增加DataGridEx
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chfei committed
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@@ -0,0 +1,100 @@
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Media;
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using System.Windows.Threading;
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namespace Store.Management.Framework.Controls;
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public partial class DataGridEx
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{
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private DispatcherTimer? imageResumeTimer;
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private bool draggingScrollThumb;
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private void InitializeImageLoadingPause()
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{
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imageResumeTimer = new DispatcherTimer(DispatcherPriority.Background, Dispatcher)
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{
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Interval = TimeSpan.FromMilliseconds(500)
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};
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imageResumeTimer.Tick += (_, _) =>
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{
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imageResumeTimer.Stop();
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if (!draggingScrollThumb && IsLoaded) SetImageLoadingSuspended(false);
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};
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AddHandler(Thumb.DragStartedEvent, new DragStartedEventHandler(ScrollThumbDragStarted), true);
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AddHandler(Thumb.DragCompletedEvent, new DragCompletedEventHandler(ScrollThumbDragCompleted), true);
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AddHandler(ScrollViewer.ScrollChangedEvent, new ScrollChangedEventHandler(ImageScrollChanged), true);
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Unloaded += (_, _) =>
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{
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imageResumeTimer.Stop(); draggingScrollThumb = false;
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SetImageLoadingSuspended(true);
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};
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Loaded += (_, _) => { ApplyImageLoadingOptions(); SetImageLoadingSuspended(false); };
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ApplyImageLoadingOptions();
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}
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private void SetImageLoadingSuspended(bool suspended)
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{
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SetValue(IsImageLoadingSuspendedPropertyKey, suspended);
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NetworkThumbnail.SetIsLoadingSuspended(this, suspended);
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}
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private void ApplyImageLoadingOptions()
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{
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NetworkThumbnail.SetCacheEnabled(this, EnableImageCache);
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if (imageResumeTimer == null) return;
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if (!PauseImageLoadingWhileDragging)
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{
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imageResumeTimer.Stop(); draggingScrollThumb = false; SetImageLoadingSuspended(false);
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}
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}
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private bool IsOwnScrollBar(DependencyObject? source)
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{
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var foundScrollBar = false;
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for (var parent = source; parent != null; parent = VisualTreeHelper.GetParent(parent))
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{
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if (parent is ScrollBar) foundScrollBar = true;
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if (parent is DataGrid) return ReferenceEquals(parent, this) && foundScrollBar;
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}
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return false;
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}
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private void ScrollThumbDragStarted(object sender, DragStartedEventArgs e)
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{
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if (!PauseImageLoadingWhileDragging || !IsOwnScrollBar(e.OriginalSource as DependencyObject)) return;
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draggingScrollThumb = true;
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imageResumeTimer!.Stop();
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// 继承到可见图片及随后回收生成的新行，立即取消请求并清空图片。
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SetImageLoadingSuspended(true);
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}
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private void ScrollThumbDragCompleted(object sender, DragCompletedEventArgs e)
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{
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if (!PauseImageLoadingWhileDragging || !IsOwnScrollBar(e.OriginalSource as DependencyObject)) return;
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draggingScrollThumb = false;
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RestartImageResumeTimer();
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}
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private void ImageScrollChanged(object sender, ScrollChangedEventArgs e)
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{
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if (!NetworkThumbnail.GetIsLoadingSuspended(this) || draggingScrollThumb ||
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(e.VerticalChange == 0 && e.HorizontalChange == 0) ||
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!IsOwnScrollViewer(e.OriginalSource as DependencyObject)) return;
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RestartImageResumeTimer();
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}
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private bool IsOwnScrollViewer(DependencyObject? source)
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{
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for (var parent = source; parent != null; parent = VisualTreeHelper.GetParent(parent))
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if (parent is DataGrid) return ReferenceEquals(parent, this);
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return false;
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}
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private void RestartImageResumeTimer()
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{
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imageResumeTimer!.Stop();
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imageResumeTimer.Start();
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}
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}
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@@ -0,0 +1,52 @@
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using Store.Management.Framework.Controls.Attach;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Input;
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namespace Store.Management.Framework.Controls;
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public partial class DataGridEx
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{
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public static readonly DependencyProperty NoDataTipsProperty = DataGridHelper.NoDataTipsProperty.AddOwner(typeof(DataGridEx));
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public string NoDataTips { get => (string)GetValue(NoDataTipsProperty); set => SetValue(NoDataTipsProperty, value); }
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public static readonly DependencyProperty IsActiveProperty = DataGridHelper.IsActiveProperty.AddOwner(typeof(DataGridEx));
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/// <summary>为 true 时抑制空数据提示；可在业务加载数据期间设置。</summary>
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public bool IsActive { get => (bool)GetValue(IsActiveProperty); set => SetValue(IsActiveProperty, value); }
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public static readonly DependencyProperty RowContextMenuProperty = DependencyProperty.Register(nameof(RowContextMenu), typeof(ContextMenu), typeof(DataGridEx), new PropertyMetadata(null));
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public ContextMenu? RowContextMenu { get => (ContextMenu?)GetValue(RowContextMenuProperty); set => SetValue(RowContextMenuProperty, value); }
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public static readonly DependencyProperty ShowSelectAllProperty = DependencyProperty.Register(nameof(ShowSelectAll), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true));
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public static readonly DependencyProperty ToggleSelectionOnRowHeaderClickProperty = DependencyProperty.Register(nameof(ToggleSelectionOnRowHeaderClick), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true));
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public static readonly DependencyProperty SelectRowOnRightClickProperty = DependencyProperty.Register(nameof(SelectRowOnRightClick), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false));
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public static readonly DependencyProperty PauseImageLoadingWhileDraggingProperty = DependencyProperty.Register(nameof(PauseImageLoadingWhileDragging), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true, ImageOptionsChanged));
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public static readonly DependencyProperty EnableImageCacheProperty = DependencyProperty.Register(nameof(EnableImageCache), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true, ImageOptionsChanged));
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private static readonly DependencyPropertyKey IsImageLoadingSuspendedPropertyKey = DependencyProperty.RegisterReadOnly(nameof(IsImageLoadingSuspended), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false));
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public static readonly DependencyProperty IsImageLoadingSuspendedProperty = IsImageLoadingSuspendedPropertyKey.DependencyProperty;
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public bool ShowSelectAll { get => (bool)GetValue(ShowSelectAllProperty); set => SetValue(ShowSelectAllProperty, value); }
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public bool ToggleSelectionOnRowHeaderClick { get => (bool)GetValue(ToggleSelectionOnRowHeaderClickProperty); set => SetValue(ToggleSelectionOnRowHeaderClickProperty, value); }
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public bool SelectRowOnRightClick { get => (bool)GetValue(SelectRowOnRightClickProperty); set => SetValue(SelectRowOnRightClickProperty, value); }
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/// <summary>默认开启；拖动时暂停并清空图片，停止滚动 500ms 后恢复。</summary>
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public bool PauseImageLoadingWhileDragging { get => (bool)GetValue(PauseImageLoadingWhileDraggingProperty); set => SetValue(PauseImageLoadingWhileDraggingProperty, value); }
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/// <summary>默认开启图片缓存；设为 false 时不读取或写入缓存。</summary>
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public bool EnableImageCache { get => (bool)GetValue(EnableImageCacheProperty); set => SetValue(EnableImageCacheProperty, value); }
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public bool IsImageLoadingSuspended => (bool)GetValue(IsImageLoadingSuspendedProperty);
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private static void ImageOptionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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=> ((DataGridEx)d).ApplyImageLoadingOptions();
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protected override void OnPreviewMouseRightButtonDown(MouseButtonEventArgs e)
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{
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if (SelectRowOnRightClick && !e.Handled && SelectionUnit != DataGridSelectionUnit.Cell && e.OriginalSource is DependencyObject source)
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{
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var row = FindRow(source);
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if (row != null && ItemsControl.ItemsControlFromItemContainer(row) == this && !row.IsSelected &&
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row.Item != System.Windows.Data.CollectionView.NewItemPlaceholder)
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{
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UnselectAll(); row.SetCurrentValue(DataGridRow.IsSelectedProperty, true);
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}
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}
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base.OnPreviewMouseRightButtonDown(e);
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}
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}
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@@ -0,0 +1,207 @@
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using System.Collections;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Data;
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using System.Windows.Input;
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namespace Store.Management.Framework.Controls;
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/// <summary>调用方收到请求后加载对应页，再更新 ItemsSource 和 TotalItemCount。</summary>
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public sealed record DataGridPageRequest(int PageIndex, int PageSize);
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public partial class DataGridEx
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{
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public static readonly DependencyProperty IsLoadingProperty = DependencyProperty.Register(nameof(IsLoading), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false));
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public static readonly DependencyProperty LoadingTextProperty = DependencyProperty.Register(nameof(LoadingText), typeof(string), typeof(DataGridEx), new PropertyMetadata("正在加载数据…"));
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/// <summary>加载时显示动画并禁用表格内容；由调用方控制请求生命周期。</summary>
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public bool IsLoading { get => (bool)GetValue(IsLoadingProperty); set => SetValue(IsLoadingProperty, value); }
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public string LoadingText { get => (string)GetValue(LoadingTextProperty); set => SetValue(LoadingTextProperty, value); }
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public static readonly DependencyProperty ShowToolbarProperty = DependencyProperty.Register(nameof(ShowToolbar), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true));
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public static readonly DependencyProperty ShowColumnSettingsProperty = DependencyProperty.Register(nameof(ShowColumnSettings), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true));
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public static readonly DependencyProperty ShowPaginationProperty = DependencyProperty.Register(nameof(ShowPagination), typeof(bool), typeof(DataGridEx), new PropertyMetadata(true, HeaderOptionsChanged));
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public static readonly DependencyProperty ToolbarContentProperty = DependencyProperty.Register(nameof(ToolbarContent), typeof(object), typeof(DataGridEx));
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public static readonly DependencyProperty PaginationContentProperty = DependencyProperty.Register(nameof(PaginationContent), typeof(object), typeof(DataGridEx));
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public static readonly DependencyProperty PageSizesProperty = DependencyProperty.Register(nameof(PageSizes), typeof(IEnumerable), typeof(DataGridEx), new PropertyMetadata(new[] { 20, 50, 100 }));
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public static readonly DependencyProperty PageChangedCommandProperty = DependencyProperty.Register(nameof(PageChangedCommand), typeof(ICommand), typeof(DataGridEx));
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public static readonly DependencyProperty PageIndexProperty = DependencyProperty.Register(nameof(PageIndex), typeof(int), typeof(DataGridEx), new FrameworkPropertyMetadata(1, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, PageOptionsChanged), value => (int)value > 0);
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public static readonly DependencyProperty PageSizeProperty = DependencyProperty.Register(nameof(PageSize), typeof(int), typeof(DataGridEx), new FrameworkPropertyMetadata(50, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, PageOptionsChanged), value => (int)value > 0);
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public static readonly DependencyProperty TotalItemCountProperty = DependencyProperty.Register(nameof(TotalItemCount), typeof(int), typeof(DataGridEx), new PropertyMetadata(0, TotalChanged), value => (int)value >= 0);
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public bool ShowToolbar { get => (bool)GetValue(ShowToolbarProperty); set => SetValue(ShowToolbarProperty, value); }
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public bool ShowColumnSettings { get => (bool)GetValue(ShowColumnSettingsProperty); set => SetValue(ShowColumnSettingsProperty, value); }
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public bool ShowPagination { get => (bool)GetValue(ShowPaginationProperty); set => SetValue(ShowPaginationProperty, value); }
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/// <summary>自定义批量按钮区，使用调用方的 DataContext。</summary>
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public object? ToolbarContent { get => GetValue(ToolbarContentProperty); set => SetValue(ToolbarContentProperty, value); }
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/// <summary>自定义整个分页栏，继承调用方 DataContext；null 时使用默认分页栏。</summary>
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public object? PaginationContent { get => GetValue(PaginationContentProperty); set => SetValue(PaginationContentProperty, value); }
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public IEnumerable PageSizes { get => (IEnumerable)GetValue(PageSizesProperty); set => SetValue(PageSizesProperty, value); }
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public ICommand? PageChangedCommand { get => (ICommand?)GetValue(PageChangedCommandProperty); set => SetValue(PageChangedCommandProperty, value); }
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public int PageIndex { get => (int)GetValue(PageIndexProperty); set => SetValue(PageIndexProperty, value); }
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public int PageSize { get => (int)GetValue(PageSizeProperty); set => SetValue(PageSizeProperty, value); }
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public int TotalItemCount { get => (int)GetValue(TotalItemCountProperty); set => SetValue(TotalItemCountProperty, value); }
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private static readonly DependencyPropertyKey PageCountPropertyKey = DependencyProperty.RegisterReadOnly(nameof(PageCount), typeof(int), typeof(DataGridEx), new PropertyMetadata(1));
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public static readonly DependencyProperty PageCountProperty = PageCountPropertyKey.DependencyProperty;
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public int PageCount => (int)GetValue(PageCountProperty);
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private static readonly DependencyPropertyKey PageSummaryPropertyKey = DependencyProperty.RegisterReadOnly(nameof(PageSummary), typeof(string), typeof(DataGridEx), new PropertyMetadata("1 / 1"));
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public static readonly DependencyProperty PageSummaryProperty = PageSummaryPropertyKey.DependencyProperty;
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public string PageSummary => (string)GetValue(PageSummaryProperty);
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private static readonly DependencyPropertyKey TotalSummaryPropertyKey = DependencyProperty.RegisterReadOnly(nameof(TotalSummary), typeof(string), typeof(DataGridEx), new PropertyMetadata("共 0 条记录"));
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public static readonly DependencyProperty TotalSummaryProperty = TotalSummaryPropertyKey.DependencyProperty;
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public string TotalSummary => (string)GetValue(TotalSummaryProperty);
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private static readonly DependencyPropertyKey SelectionSummaryPropertyKey = DependencyProperty.RegisterReadOnly(nameof(SelectionSummary), typeof(string), typeof(DataGridEx), new PropertyMetadata("选择记录后可批量操作"));
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public static readonly DependencyProperty SelectionSummaryProperty = SelectionSummaryPropertyKey.DependencyProperty;
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public string SelectionSummary => (string)GetValue(SelectionSummaryProperty);
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/// <summary>设为 false 的业务列在列设置中固定显示。</summary>
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public static readonly DependencyProperty CanHideColumnProperty = DependencyProperty.RegisterAttached("CanHideColumn", typeof(bool), typeof(DataGridEx), new PropertyMetadata(true, CanHideColumnChanged));
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public static bool GetCanHideColumn(DependencyObject column) => (bool)column.GetValue(CanHideColumnProperty);
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public static void SetCanHideColumn(DependencyObject column, bool value) => column.SetValue(CanHideColumnProperty, value);
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private static void CanHideColumnChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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if (!(bool)e.NewValue && d is DataGridColumn column)
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{
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column.SetCurrentValue(DataGridColumn.VisibilityProperty, Visibility.Visible);
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}
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}
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public static readonly DependencyProperty RowNumberProperty = DependencyProperty.RegisterAttached("RowNumber", typeof(long), typeof(DataGridEx), new FrameworkPropertyMetadata(0L, FrameworkPropertyMetadataOptions.Inherits));
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public static long GetRowNumber(DependencyObject target) => (long)target.GetValue(RowNumberProperty);
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public static void SetRowNumber(DependencyObject target, long value) => target.SetValue(RowNumberProperty, value);
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public static readonly RoutedUICommand FirstPageCommand = new("首页", nameof(FirstPageCommand), typeof(DataGridEx));
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public static readonly RoutedUICommand PreviousPageCommand = new("上一页", nameof(PreviousPageCommand), typeof(DataGridEx));
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public static readonly RoutedUICommand NextPageCommand = new("下一页", nameof(NextPageCommand), typeof(DataGridEx));
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public static readonly RoutedUICommand LastPageCommand = new("末页", nameof(LastPageCommand), typeof(DataGridEx));
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private readonly RowNumberColumn rowNumberColumn = new();
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private Button? columnsButton;
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private bool updatingPage;
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private void InitializeWorkbench()
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{
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Columns.Add(rowNumberColumn);
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UpdateHeaderOptions();
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CommandBindings.Add(new CommandBinding(FirstPageCommand, (_, e) => { SetCurrentValue(PageIndexProperty, 1); e.Handled = true; }, (_, e) => { e.CanExecute = PageIndex > 1; e.Handled = true; }));
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CommandBindings.Add(new CommandBinding(PreviousPageCommand, (_, e) => { SetCurrentValue(PageIndexProperty, PageIndex - 1); e.Handled = true; }, (_, e) => { e.CanExecute = PageIndex > 1; e.Handled = true; }));
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CommandBindings.Add(new CommandBinding(NextPageCommand, (_, e) => { SetCurrentValue(PageIndexProperty, PageIndex + 1); e.Handled = true; }, (_, e) => { e.CanExecute = PageIndex < PageCount; e.Handled = true; }));
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CommandBindings.Add(new CommandBinding(LastPageCommand, (_, e) => { SetCurrentValue(PageIndexProperty, PageCount); e.Handled = true; }, (_, e) => { e.CanExecute = PageIndex < PageCount; e.Handled = true; }));
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}
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private void UpdateHeaderOptions()
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{
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SetCurrentValue(RowHeaderWidthProperty, ShowCheckBox ? 32d : 0d);
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rowNumberColumn.Visibility = ShowRowNumber ? Visibility.Visible : Visibility.Collapsed;
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QueueHeaderUpdate();
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}
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private static void PageOptionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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DataGridEx grid = (DataGridEx)d;
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if (grid.updatingPage)
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{
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return;
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}
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grid.updatingPage = true;
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try
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{
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grid.SetCurrentValue(PageIndexProperty, e.Property == PageSizeProperty ? 1 : Math.Min(grid.PageIndex, grid.CalculatePageCount()));
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grid.UpdatePageSummary();
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}
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finally
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{
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grid.updatingPage = false;
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}
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grid.UnselectAll();
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grid.QueueHeaderUpdate();
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DataGridPageRequest request = new(grid.PageIndex, grid.PageSize);
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if (grid.PageChangedCommand?.CanExecute(request) == true)
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{
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grid.PageChangedCommand.Execute(request);
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}
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}
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private static void TotalChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
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{
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DataGridEx grid = (DataGridEx)d;
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grid.UpdatePageSummary();
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if (grid.PageIndex > grid.PageCount)
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{
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grid.SetCurrentValue(PageIndexProperty, grid.PageCount);
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}
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}
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private int CalculatePageCount() => Math.Max(1, (int)(((long)TotalItemCount + PageSize - 1) / PageSize));
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private void UpdatePageSummary()
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{
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SetValue(PageCountPropertyKey, CalculatePageCount());
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SetValue(PageSummaryPropertyKey, $"{PageIndex} / {PageCount}");
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SetValue(TotalSummaryPropertyKey, $"共 {TotalItemCount:N0} 条记录");
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CommandManager.InvalidateRequerySuggested();
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}
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public override void OnApplyTemplate()
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{
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if (columnsButton != null)
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{
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columnsButton.Click -= OpenColumnSettings;
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}
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base.OnApplyTemplate();
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columnsButton = GetTemplateChild("PART_ColumnsButton") as Button;
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if (columnsButton != null)
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{
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columnsButton.Click += OpenColumnSettings;
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}
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}
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private void OpenColumnSettings(object sender, RoutedEventArgs e)
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{
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ContextMenu menu = new() { PlacementTarget = columnsButton, Placement = PlacementMode.Bottom, VerticalOffset = 6, Style = (Style)FindResource("DataGridExColumnMenu") };
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menu.CommandBindings.Add(new CommandBinding(ApplicationCommands.Close, (_, _) => menu.IsOpen = false));
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foreach (DataGridColumn column in Columns.OrderBy(column => column.DisplayIndex))
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{
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if (column == rowNumberColumn)
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{
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continue;
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}
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bool canHide = GetCanHideColumn(column);
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MenuItem option = new()
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{
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Header = $"{column.Header}{(canHide ? string.Empty : "（固定）")}",
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IsCheckable = true,
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IsChecked = column.Visibility == Visibility.Visible,
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IsEnabled = canHide,
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StaysOpenOnClick = true
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};
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option.Click += (_, _) => column.SetCurrentValue(DataGridColumn.VisibilityProperty, option.IsChecked ? Visibility.Visible : Visibility.Collapsed);
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menu.Items.Add(option);
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}
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columnsButton!.ContextMenu = menu;
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menu.IsOpen = true;
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}
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private sealed class RowNumberColumn : DataGridColumn
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{
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public RowNumberColumn()
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{
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Header = "序号";
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Width = 52;
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IsReadOnly = true;
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CanUserSort = false;
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CanUserReorder = false;
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}
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protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
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{
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TextBlock text = new() { HorizontalAlignment = HorizontalAlignment.Right, VerticalAlignment = VerticalAlignment.Center };
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text.SetBinding(TextBlock.TextProperty, new Binding { Path = new PropertyPath(RowNumberProperty), RelativeSource = RelativeSource.Self, Mode = BindingMode.OneWay });
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return text;
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}
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protected override FrameworkElement GenerateEditingElement(DataGridCell cell, object dataItem) => GenerateElement(cell, dataItem);
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}
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}
|
||||
@@ -0,0 +1,330 @@
|
||||
using System.Collections;
|
||||
using System.Collections.Specialized;
|
||||
using System.Windows;
|
||||
using System.Windows.Controls;
|
||||
using System.Windows.Controls.Primitives;
|
||||
using System.Windows.Input;
|
||||
using System.Windows.Media;
|
||||
using System.Windows.Threading;
|
||||
|
||||
namespace Store.Management.Framework.Controls;
|
||||
|
||||
/// <summary>带默认样式、行号和行选择勾选框的 DataGrid。</summary>
|
||||
public partial class DataGridEx : DataGrid
|
||||
{
|
||||
public static readonly DependencyProperty SelectedItemsProperty = DependencyProperty.Register(
|
||||
nameof(SelectedItems), typeof(IList), typeof(DataGridEx),
|
||||
new FrameworkPropertyMetadata(null, OnSelectedItemsChanged));
|
||||
|
||||
/// <summary>可绑定的选中集合。使用 ObservableCollection 可从 VM 增删选中项；未绑定时返回原生选中集合。</summary>
|
||||
public new IList SelectedItems
|
||||
{
|
||||
get => (IList?)GetValue(SelectedItemsProperty) ?? base.SelectedItems;
|
||||
set => SetValue(SelectedItemsProperty, value);
|
||||
}
|
||||
|
||||
/// <summary>批量恢复性能测试前的选择，只发出一次选择变更。</summary>
|
||||
internal void RestoreSelection(IEnumerable<object> selected)
|
||||
{
|
||||
var available = Items.Cast<object>().ToHashSet();
|
||||
BeginUpdateSelectedItems();
|
||||
try
|
||||
{
|
||||
base.SelectedItems.Clear();
|
||||
foreach (var item in selected)
|
||||
if (available.Contains(item)) base.SelectedItems.Add(item);
|
||||
}
|
||||
finally { EndUpdateSelectedItems(); }
|
||||
}
|
||||
|
||||
private bool synchronizingSelection;
|
||||
|
||||
private static void OnSelectedItemsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
var grid = (DataGridEx)d;
|
||||
if (e.NewValue is IList { IsReadOnly: true } or IList { IsFixedSize: true })
|
||||
throw new ArgumentException("SelectedItems 必须绑定到可增删的集合，例如 ObservableCollection<T>。");
|
||||
if (e.OldValue is INotifyCollectionChanged oldCollection)
|
||||
CollectionChangedEventManager.RemoveHandler(oldCollection, grid.OnBoundSelectionChanged);
|
||||
if (e.NewValue is INotifyCollectionChanged newCollection)
|
||||
CollectionChangedEventManager.AddHandler(newCollection, grid.OnBoundSelectionChanged);
|
||||
grid.ApplyBoundSelection();
|
||||
}
|
||||
|
||||
private void OnBoundSelectionChanged(object? sender, NotifyCollectionChangedEventArgs e) => ApplyBoundSelection();
|
||||
|
||||
private void ApplyBoundSelection()
|
||||
{
|
||||
if (synchronizingSelection || GetValue(SelectedItemsProperty) is not IList boundItems ||
|
||||
ReferenceEquals(boundItems, base.SelectedItems) || SelectionUnit == DataGridSelectionUnit.Cell) return;
|
||||
var available = Items.Cast<object>().ToHashSet();
|
||||
var desired = boundItems.Cast<object>().Where(item => available.Contains(item) &&
|
||||
item != System.Windows.Data.CollectionView.NewItemPlaceholder).Distinct().ToList();
|
||||
if (SelectionMode == DataGridSelectionMode.Single) desired = desired.Take(1).ToList();
|
||||
synchronizingSelection = true;
|
||||
try
|
||||
{
|
||||
var desiredSet = desired.ToHashSet();
|
||||
var current = base.SelectedItems.Cast<object>().ToHashSet();
|
||||
if (SelectionMode == DataGridSelectionMode.Single)
|
||||
SetCurrentValue(SelectedItemProperty, desired.FirstOrDefault());
|
||||
else if (desired.Count == 0) UnselectAll();
|
||||
else
|
||||
{
|
||||
foreach (var item in current)
|
||||
if (!desiredSet.Contains(item)) base.SelectedItems.Remove(item);
|
||||
foreach (var item in desired)
|
||||
if (!current.Contains(item)) base.SelectedItems.Add(item);
|
||||
}
|
||||
}
|
||||
finally { synchronizingSelection = false; }
|
||||
UpdateSelectAllState();
|
||||
}
|
||||
|
||||
private void PublishSelection()
|
||||
{
|
||||
if (synchronizingSelection || GetValue(SelectedItemsProperty) is not IList boundItems ||
|
||||
ReferenceEquals(boundItems, base.SelectedItems)) return;
|
||||
synchronizingSelection = true;
|
||||
try
|
||||
{
|
||||
var current = base.SelectedItems.Cast<object>().ToArray();
|
||||
if (current.Length == 0) boundItems.Clear();
|
||||
else
|
||||
{
|
||||
var currentSet = current.ToHashSet();
|
||||
for (var i = boundItems.Count - 1; i >= 0; i--)
|
||||
if (!currentSet.Contains(boundItems[i]!)) boundItems.RemoveAt(i);
|
||||
var boundSet = boundItems.Cast<object>().ToHashSet();
|
||||
foreach (var item in current)
|
||||
if (boundSet.Add(item)) boundItems.Add(item);
|
||||
}
|
||||
}
|
||||
finally { synchronizingSelection = false; }
|
||||
}
|
||||
|
||||
protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
|
||||
{
|
||||
var wasSynchronizing = synchronizingSelection;
|
||||
synchronizingSelection = true;
|
||||
try { base.OnItemsSourceChanged(oldValue, newValue); }
|
||||
finally { synchronizingSelection = wasSynchronizing; }
|
||||
ApplyBoundSelection();
|
||||
}
|
||||
private static readonly DependencyPropertyKey IsSelectionModeActivePropertyKey = DependencyProperty.RegisterReadOnly(
|
||||
nameof(IsSelectionModeActive), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false));
|
||||
public static readonly DependencyProperty IsSelectionModeActiveProperty = IsSelectionModeActivePropertyKey.DependencyProperty;
|
||||
/// <summary>点击行头勾选框后进入批量选择，取消所有选中后退出。</summary>
|
||||
public bool IsSelectionModeActive => (bool)GetValue(IsSelectionModeActiveProperty);
|
||||
public static readonly RoutedUICommand ToggleSelectAllCommand = new("全选或取消全选", nameof(ToggleSelectAllCommand), typeof(DataGridEx));
|
||||
private static readonly DependencyPropertyKey AreAllRowsSelectedPropertyKey = DependencyProperty.RegisterReadOnly(
|
||||
nameof(AreAllRowsSelected), typeof(bool?), typeof(DataGridEx), new PropertyMetadata(false));
|
||||
public static readonly DependencyProperty AreAllRowsSelectedProperty = AreAllRowsSelectedPropertyKey.DependencyProperty;
|
||||
/// <summary>全部选中为 true，部分选中为 null，未选中为 false。</summary>
|
||||
public bool? AreAllRowsSelected => (bool?)GetValue(AreAllRowsSelectedProperty);
|
||||
public static readonly DependencyProperty SelectedRowBackgroundProperty = DependencyProperty.Register(
|
||||
nameof(SelectedRowBackground), typeof(Brush), typeof(DataGridEx),
|
||||
new PropertyMetadata((Brush)new BrushConverter().ConvertFromString("#F3EAF1")!));
|
||||
public static readonly DependencyProperty SelectedRowForegroundProperty = DependencyProperty.Register(
|
||||
nameof(SelectedRowForeground), typeof(Brush), typeof(DataGridEx), new PropertyMetadata(Brushes.Black));
|
||||
public static readonly DependencyProperty ShowCheckBoxProperty = DependencyProperty.Register(
|
||||
nameof(ShowCheckBox), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false, HeaderOptionsChanged));
|
||||
public static readonly DependencyProperty ShowRowNumberProperty = DependencyProperty.Register(
|
||||
nameof(ShowRowNumber), typeof(bool), typeof(DataGridEx), new PropertyMetadata(false, HeaderOptionsChanged));
|
||||
|
||||
public Brush SelectedRowBackground { get => (Brush)GetValue(SelectedRowBackgroundProperty); set => SetValue(SelectedRowBackgroundProperty, value); }
|
||||
public Brush SelectedRowForeground { get => (Brush)GetValue(SelectedRowForegroundProperty); set => SetValue(SelectedRowForegroundProperty, value); }
|
||||
/// <summary>勾选状态与行 IsSelected 同步，可通过 SelectedItems 获取。</summary>
|
||||
public bool ShowCheckBox { get => (bool)GetValue(ShowCheckBoxProperty); set => SetValue(ShowCheckBoxProperty, value); }
|
||||
public bool ShowRowNumber { get => (bool)GetValue(ShowRowNumberProperty); set => SetValue(ShowRowNumberProperty, value); }
|
||||
|
||||
static DataGridEx()
|
||||
{
|
||||
DefaultStyleKeyProperty.OverrideMetadata(typeof(DataGridEx), new FrameworkPropertyMetadata(typeof(DataGridEx)));
|
||||
}
|
||||
|
||||
public DataGridEx()
|
||||
{
|
||||
InitializeImageLoadingPause();
|
||||
InitializeWorkbench();
|
||||
CommandBindings.Add(new CommandBinding(ToggleSelectAllCommand, (_, e) =>
|
||||
{
|
||||
if (AreAllRowsSelected == true) UnselectAll();
|
||||
else
|
||||
{
|
||||
SelectAll();
|
||||
SetValue(IsSelectionModeActivePropertyKey, base.SelectedItems.Count > 0);
|
||||
}
|
||||
e.Handled = true;
|
||||
}, (_, e) =>
|
||||
{
|
||||
e.CanExecute = SelectionMode == DataGridSelectionMode.Extended &&
|
||||
SelectionUnit != DataGridSelectionUnit.Cell && SelectableItemCount > 0;
|
||||
e.Handled = true;
|
||||
}));
|
||||
AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(OnRowCheckBoxClick), true);
|
||||
LoadingRow += (_, e) => UpdateRowNumber(e.Row);
|
||||
ItemContainerGenerator.ItemsChanged += (_, _) => QueueHeaderUpdate();
|
||||
Loaded += (_, _) => { ApplyBoundSelection(); QueueHeaderUpdate(); };
|
||||
}
|
||||
|
||||
private void OnRowCheckBoxClick(object sender, RoutedEventArgs e)
|
||||
{
|
||||
if (e.OriginalSource is not CheckBox checkBox) return;
|
||||
DependencyObject? parent = checkBox;
|
||||
while (parent != null && parent != this)
|
||||
{
|
||||
if (parent is DataGridRowHeader header &&
|
||||
ItemsControl.ItemsControlFromItemContainer(FindRow(header)) == this)
|
||||
{
|
||||
SetValue(IsSelectionModeActivePropertyKey, base.SelectedItems.Count > 0);
|
||||
return;
|
||||
}
|
||||
parent = VisualTreeHelper.GetParent(parent);
|
||||
}
|
||||
}
|
||||
|
||||
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
|
||||
{
|
||||
if (!e.Handled && SelectionUnit == DataGridSelectionUnit.CellOrRowHeader)
|
||||
{
|
||||
for (DependencyObject? source = e.OriginalSource as DependencyObject; source != null && source != this;
|
||||
source = source is FrameworkContentElement content ? content.Parent : VisualTreeHelper.GetParent(source))
|
||||
{
|
||||
if (source is DataGrid)
|
||||
{
|
||||
break;
|
||||
}
|
||||
if (source is Border border && FindRow(border) is DataGridRow blankRow &&
|
||||
ItemsControl.ItemsControlFromItemContainer(blankRow) == this &&
|
||||
ReferenceEquals(blankRow.Template.FindName("border", blankRow), border))
|
||||
{
|
||||
SelectRowThroughHeader(blankRow, e);
|
||||
break;
|
||||
} if (source is DataGridCell cell)
|
||||
{
|
||||
if (cell.Column == rowNumberColumn && FindRow(cell) is DataGridRow row)
|
||||
{
|
||||
SelectRowThroughHeader(row, e);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!e.Handled && ShowCheckBox && ToggleSelectionOnRowHeaderClick && SelectionUnit != DataGridSelectionUnit.Cell)
|
||||
{
|
||||
for (var source = e.OriginalSource as DependencyObject; source != null && source != this;
|
||||
source = source is FrameworkContentElement content ? content.Parent : VisualTreeHelper.GetParent(source))
|
||||
{
|
||||
// 保留行高拖动和嵌套表格自己的鼠标处理。
|
||||
if (source is Thumb || source is DataGrid) break;
|
||||
if (source is not DataGridRowHeader header) continue;
|
||||
var row = FindRow(header);
|
||||
if (row == null || ItemsControl.ItemsControlFromItemContainer(row) != this ||
|
||||
row.Item == System.Windows.Data.CollectionView.NewItemPlaceholder) break;
|
||||
|
||||
// 在 DataGridRowHeader 默认单选逻辑之前处理整个行头，
|
||||
// 包括勾选框四周的留白；阻止 CheckBox 再次切换造成双重反转。
|
||||
e.Handled = true;
|
||||
row.SetCurrentValue(DataGridRow.IsSelectedProperty, !row.IsSelected);
|
||||
SetValue(IsSelectionModeActivePropertyKey, base.SelectedItems.Count > 0);
|
||||
return;
|
||||
}
|
||||
}
|
||||
base.OnPreviewMouseLeftButtonDown(e);
|
||||
}
|
||||
|
||||
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
|
||||
{
|
||||
if (!e.Handled && SelectionUnit != DataGridSelectionUnit.Cell &&
|
||||
e.OriginalSource is Border border &&
|
||||
FindRow(border) is DataGridRow row &&
|
||||
ItemsControl.ItemsControlFromItemContainer(row) == this &&
|
||||
ReferenceEquals(row.Template.FindName("border", row), border))
|
||||
{
|
||||
SelectRowThroughHeader(row, e);
|
||||
}
|
||||
base.OnMouseLeftButtonDown(e);
|
||||
}
|
||||
|
||||
private static void SelectRowThroughHeader(DataGridRow row, MouseButtonEventArgs e)
|
||||
{
|
||||
// 序号和行尾留白沿用原生行头逻辑，保留 Ctrl/Shift 与选择锚点。
|
||||
if (row.Template.FindName("PART_RowHeader", row) is DataGridRowHeader header)
|
||||
{
|
||||
header.RaiseEvent(new MouseButtonEventArgs(e.MouseDevice, e.Timestamp, e.ChangedButton, e.StylusDevice)
|
||||
{
|
||||
RoutedEvent = Mouse.MouseDownEvent
|
||||
});
|
||||
e.Handled = true;
|
||||
}
|
||||
}
|
||||
private static DataGridRow? FindRow(DependencyObject element)
|
||||
{
|
||||
for (DependencyObject? parent = element; parent != null; parent = parent is FrameworkContentElement content ? content.Parent : VisualTreeHelper.GetParent(parent))
|
||||
if (parent is DataGridRow row) return row;
|
||||
return null;
|
||||
}
|
||||
|
||||
private static void HeaderOptionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
=> ((DataGridEx)d).UpdateHeaderOptions();
|
||||
|
||||
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
|
||||
{
|
||||
base.OnItemsChanged(e);
|
||||
QueueHeaderUpdate();
|
||||
UpdateSelectAllState();
|
||||
}
|
||||
|
||||
private int SelectableItemCount => Items.Count - (Items.Contains(System.Windows.Data.CollectionView.NewItemPlaceholder) ? 1 : 0);
|
||||
|
||||
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
|
||||
{
|
||||
PublishSelection();
|
||||
base.OnSelectionChanged(e);
|
||||
UpdateSelectAllState();
|
||||
}
|
||||
|
||||
private void UpdateSelectAllState()
|
||||
{
|
||||
SetValue(AreAllRowsSelectedPropertyKey, base.SelectedItems.Count == 0 ? false :
|
||||
base.SelectedItems.Count == SelectableItemCount ? true : (bool?)null);
|
||||
if (base.SelectedItems.Count == 0) SetValue(IsSelectionModeActivePropertyKey, false);
|
||||
SetValue(SelectionSummaryPropertyKey, base.SelectedItems.Count == 0 ? "选择记录后可批量操作" : $"已选择 {base.SelectedItems.Count} 条记录");
|
||||
CommandManager.InvalidateRequerySuggested();
|
||||
}
|
||||
|
||||
protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
base.OnPropertyChanged(e);
|
||||
if (e.Property == FontSizeProperty || e.Property == FontFamilyProperty ||
|
||||
e.Property == FontStyleProperty || e.Property == FontWeightProperty || e.Property == FontStretchProperty)
|
||||
QueueHeaderUpdate();
|
||||
}
|
||||
|
||||
private bool headerUpdatePending;
|
||||
private void QueueHeaderUpdate()
|
||||
{
|
||||
if (headerUpdatePending) return;
|
||||
headerUpdatePending = true;
|
||||
Dispatcher.BeginInvoke(DispatcherPriority.Loaded, new Action(() =>
|
||||
{
|
||||
headerUpdatePending = false;
|
||||
foreach (var row in GetRealizedRows(this)) UpdateRowNumber(row);
|
||||
}));
|
||||
}
|
||||
|
||||
private void UpdateRowNumber(DataGridRow row)
|
||||
=> row.SetValue(RowNumberProperty, (PageIndex - 1L) * PageSize + row.GetIndex() + 1);
|
||||
|
||||
private IEnumerable<DataGridRow> GetRealizedRows(DependencyObject parent)
|
||||
{
|
||||
for (var i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
|
||||
{
|
||||
var child = VisualTreeHelper.GetChild(parent, i);
|
||||
if (child is DataGridRow row && ItemsControl.ItemsControlFromItemContainer(row) == this) yield return row;
|
||||
else if (child is not DataGrid)
|
||||
foreach (var descendant in GetRealizedRows(child)) yield return descendant;
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,875 @@
|
||||
<ResourceDictionary
|
||||
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
|
||||
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
|
||||
xmlns:local="clr-namespace:Store.Management.Framework.Controls"
|
||||
xmlns:ext="clr-namespace:Store.Management.Framework.Controls"
|
||||
xmlns:f="clr-namespace:Store.Management.Framework.Controls.Attach;assembly=Store.Management.Framework"
|
||||
xmlns:sys="clr-namespace:System;assembly=mscorlib">
|
||||
|
||||
|
||||
<sys:Double x:Key="DataGridExFontSize">12</sys:Double>
|
||||
<FontFamily x:Key="DataGridExFontFamily">Microsoft YaHei UI, Segoe UI</FontFamily>
|
||||
<BooleanToVisibilityConverter x:Key="DataGridExVisibility"/>
|
||||
<Style x:Key="DataGridExCheckBoxStyle" TargetType="CheckBox" BasedOn="{StaticResource {x:Type CheckBox}}"/>
|
||||
<Style x:Key="DataGridExDefaultCellHeaderStyle" TargetType="DataGridColumnHeader">
|
||||
<Setter Property="UseLayoutRounding" Value="True" />
|
||||
<!--<Setter Property="f:DataGridHelper.ShowBorder" Value="True" />-->
|
||||
|
||||
<Setter Property="Height" Value="{Binding ColumnHeaderHeight, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
<Setter Property="Background" Value="#eeeeee" />
|
||||
<Setter Property="BorderThickness" Value="0,0,0,1" />
|
||||
<!-- 只保留底边框，竖线不再用 Border 画 -->
|
||||
<Setter Property="HorizontalContentAlignment" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=HorizontalContentAlignment}" />
|
||||
<Setter Property="Padding" Value="8,0" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<Setter Property="BorderBrush" Value="{Binding HorizontalGridLinesBrush, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="DataGridColumnHeader">
|
||||
<Grid>
|
||||
<Border
|
||||
Padding="{TemplateBinding Padding}"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}"
|
||||
UseLayoutRounding="True">
|
||||
<Grid HorizontalAlignment="Stretch" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
|
||||
<Grid.ColumnDefinitions>
|
||||
<ColumnDefinition Width="*" />
|
||||
<ColumnDefinition Width="Auto" />
|
||||
</Grid.ColumnDefinitions>
|
||||
<ContentPresenter
|
||||
Grid.Column="0"
|
||||
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
|
||||
RecognizesAccessKey="True"
|
||||
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
<Grid
|
||||
x:Name="SortArrowGrid"
|
||||
Grid.Column="1"
|
||||
Width="7"
|
||||
Height="15"
|
||||
Margin="10,0,0,0"
|
||||
HorizontalAlignment="Right"
|
||||
VerticalAlignment="Center"
|
||||
Visibility="Collapsed">
|
||||
<Grid.RowDefinitions>
|
||||
<RowDefinition />
|
||||
<RowDefinition />
|
||||
</Grid.RowDefinitions>
|
||||
<Path
|
||||
x:Name="SortArrowUp"
|
||||
Margin="0,0,0,2"
|
||||
Data="M500 365.76l-244.78 279.7a16 16 0 0 0 12 26.54h489.52a16 16 0 0 0 12-26.54L524 365.76a16 16 0 0 0-24 0z"
|
||||
Fill="#D2D2D2"
|
||||
Stretch="Fill" />
|
||||
<Path
|
||||
x:Name="SortArrowDown"
|
||||
Grid.Row="1"
|
||||
Margin="0,2,0,0"
|
||||
Data="M524 658.24l244.74-279.7a16 16 0 0 0-12-26.54H267.26a16 16 0 0 0-12 26.54L500 658.24a16 16 0 0 0 24 0z"
|
||||
Fill="#D2D2D2"
|
||||
Stretch="Fill" />
|
||||
</Grid>
|
||||
</Grid>
|
||||
</Border>
|
||||
|
||||
<!-- 关键改动：用固定宽度的 Rectangle 画右侧竖线，永不消失 -->
|
||||
<Rectangle
|
||||
Width="1"
|
||||
HorizontalAlignment="Right"
|
||||
Fill="{TemplateBinding BorderBrush}"
|
||||
SnapsToDevicePixels="False" />
|
||||
|
||||
<Thumb
|
||||
x:Name="PART_LeftHeaderGripper"
|
||||
Width="6"
|
||||
HorizontalAlignment="Left"
|
||||
Background="Transparent"
|
||||
Cursor="SizeWE"
|
||||
FocusVisualStyle="{x:Null}">
|
||||
<Thumb.Style>
|
||||
<Style TargetType="Thumb">
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="Thumb">
|
||||
<Border Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" />
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
</Thumb.Style>
|
||||
</Thumb>
|
||||
<Thumb
|
||||
x:Name="PART_RightHeaderGripper"
|
||||
Width="6"
|
||||
HorizontalAlignment="Right"
|
||||
Background="Transparent"
|
||||
Cursor="SizeWE"
|
||||
FocusVisualStyle="{x:Null}">
|
||||
<Thumb.Style>
|
||||
<Style TargetType="Thumb">
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="Thumb">
|
||||
<Border Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" />
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
</Thumb.Style>
|
||||
</Thumb>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="SortDirection" Value="Ascending">
|
||||
<Setter TargetName="SortArrowGrid" Property="Visibility" Value="Visible" />
|
||||
<Setter TargetName="SortArrowUp" Property="Fill" Value="#61646D" />
|
||||
<Setter TargetName="SortArrowDown" Property="Fill" Value="#E1E4E8" />
|
||||
</Trigger>
|
||||
<Trigger Property="SortDirection" Value="Descending">
|
||||
<Setter TargetName="SortArrowGrid" Property="Visibility" Value="Visible" />
|
||||
<Setter TargetName="SortArrowUp" Property="Fill" Value="#E1E4E8" />
|
||||
<Setter TargetName="SortArrowDown" Property="Fill" Value="#61646D" />
|
||||
</Trigger>
|
||||
<Trigger Property="SortDirection" Value="{x:Null}">
|
||||
<Setter TargetName="SortArrowGrid" Property="Visibility" Value="Collapsed" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
<Style.Triggers>
|
||||
<DataTrigger Binding="{Binding GridLinesVisibility, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" Value="None">
|
||||
<Setter Property="Padding" Value="0" />
|
||||
</DataTrigger>
|
||||
</Style.Triggers>
|
||||
</Style>
|
||||
|
||||
<Style x:Key="DataGridExDefaultCellStyle" TargetType="DataGridCell">
|
||||
<Setter Property="BorderThickness" Value="0" />
|
||||
<Setter Property="Background" Value="Transparent" />
|
||||
<Setter Property="Padding" Value="8,0" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<!--<Setter Property="Foreground" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=Foreground, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />-->
|
||||
<Setter Property="VerticalContentAlignment" Value="Center" />
|
||||
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type DataGridCell}">
|
||||
<Grid>
|
||||
<Border
|
||||
Padding="{TemplateBinding Padding}"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}">
|
||||
<ContentPresenter
|
||||
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
|
||||
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
|
||||
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
</Border>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter Property="Foreground" Value="White" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style x:Key="DataGridExDefaultRowHeaderStyle" TargetType="{x:Type DataGridRowHeader}">
|
||||
<Setter Property="BorderBrush" Value="{Binding BorderBrush, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
<Setter Property="BorderThickness" Value="0,0,1,1" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type DataGridRowHeader}">
|
||||
<Border
|
||||
Background="Transparent"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}">
|
||||
<ContentPresenter
|
||||
HorizontalAlignment="Center"
|
||||
VerticalAlignment="Center"
|
||||
TextElement.FontSize="10" />
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
|
||||
<Setter Property="Foreground" Value="White" />
|
||||
</DataTrigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style x:Key="DataGridExDefaultRowStyle" TargetType="{x:Type DataGridRow}">
|
||||
<Setter Property="BorderThickness" Value="0,0,1,0" />
|
||||
<Setter Property="Background" Value="Transparent" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<Setter Property="BorderBrush" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=BorderBrush}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="DataGridRow">
|
||||
<Grid>
|
||||
<Border
|
||||
x:Name="border"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}" />
|
||||
<SelectiveScrollingGrid>
|
||||
<SelectiveScrollingGrid.ColumnDefinitions>
|
||||
<ColumnDefinition Width="Auto" />
|
||||
<ColumnDefinition Width="*" />
|
||||
</SelectiveScrollingGrid.ColumnDefinitions>
|
||||
<SelectiveScrollingGrid.RowDefinitions>
|
||||
<RowDefinition Height="*" />
|
||||
<RowDefinition Height="Auto" />
|
||||
</SelectiveScrollingGrid.RowDefinitions>
|
||||
<DataGridCellsPresenter
|
||||
Grid.Column="1"
|
||||
ItemsPanel="{TemplateBinding ItemsPanel}"
|
||||
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
<DataGridDetailsPresenter
|
||||
x:Name="DetailsPresenter"
|
||||
Grid.Row="1"
|
||||
Grid.Column="1"
|
||||
SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
|
||||
Visibility="{TemplateBinding DetailsVisibility}" />
|
||||
<DataGridRowHeader x:Name="PART_RowHeader"
|
||||
Grid.RowSpan="2"
|
||||
SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical"
|
||||
Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
</SelectiveScrollingGrid>
|
||||
<Grid
|
||||
x:Name="fousIcon"
|
||||
IsHitTestVisible="False"
|
||||
Opacity="0"
|
||||
Visibility="Collapsed">
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Top"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="0" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Right"
|
||||
VerticalAlignment="Top"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="90" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Right"
|
||||
VerticalAlignment="Bottom"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="180" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Bottom"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="-90" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
</Grid>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter TargetName="fousIcon" Property="Opacity" Value="1" />
|
||||
<!-- 整行变色 -->
|
||||
<Setter TargetName="border" Property="Background" Value="#4BB2FF" />
|
||||
</Trigger>
|
||||
<Trigger Property="DetailsVisibility" Value="Visible">
|
||||
<Setter TargetName="DetailsPresenter" Property="Margin" Value="0,0,1,0" />
|
||||
</Trigger>
|
||||
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style
|
||||
x:Key="DataGridExDefaultNumberCellHeaderStyle"
|
||||
BasedOn="{StaticResource DataGridExDefaultCellHeaderStyle}"
|
||||
TargetType="DataGridColumnHeader">
|
||||
<Setter Property="HorizontalContentAlignment" Value="Right" />
|
||||
</Style>
|
||||
|
||||
<Style
|
||||
x:Key="DataGridExDefaultNumberCellStyle"
|
||||
BasedOn="{StaticResource DataGridExDefaultCellStyle}"
|
||||
TargetType="DataGridCell">
|
||||
<Setter Property="HorizontalContentAlignment" Value="Right" />
|
||||
</Style>
|
||||
|
||||
<Style x:Key="DataGridExDefaultDataGridStyle" TargetType="local:DataGridEx">
|
||||
<Style.Resources>
|
||||
<Style x:Key="DataGridExColumnMenu" TargetType="ContextMenu">
|
||||
<Setter Property="Width" Value="240"/>
|
||||
<Setter Property="FontSize" Value="12"/>
|
||||
<Setter Property="Foreground" Value="#343A40"/>
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="ContextMenu">
|
||||
<Border Background="White" BorderBrush="#DDE0E5" BorderThickness="1" CornerRadius="6" Padding="0">
|
||||
<StackPanel KeyboardNavigation.DirectionalNavigation="Cycle">
|
||||
<StackPanel Margin="14,12,14,8">
|
||||
<TextBlock Text="显示的列" FontSize="14" FontWeight="SemiBold"/>
|
||||
<TextBlock Text="勾选后立即生效" Foreground="#858A94" Margin="0,4,0,0"/>
|
||||
</StackPanel>
|
||||
<ScrollViewer MaxHeight="340" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled" Margin="6,0,6,8">
|
||||
<ItemsPresenter KeyboardNavigation.DirectionalNavigation="Cycle"/>
|
||||
</ScrollViewer>
|
||||
<Border BorderBrush="#ECEEF1" BorderThickness="0,1,0,0" Padding="12,9" Background="#FAFAFB">
|
||||
<Button x:Name="PART_DoneButton" Content="完成" HorizontalAlignment="Right" Width="64" Height="28"
|
||||
Command="{x:Static ApplicationCommands.Close}"
|
||||
Foreground="White" Background="#98638F" BorderThickness="0">
|
||||
<Button.Template>
|
||||
<ControlTemplate TargetType="Button">
|
||||
<Border x:Name="ButtonBorder" Background="{TemplateBinding Background}" CornerRadius="4">
|
||||
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsMouseOver" Value="True"><Setter TargetName="ButtonBorder" Property="Opacity" Value="0.85"/></Trigger>
|
||||
<Trigger Property="IsKeyboardFocused" Value="True"><Setter TargetName="ButtonBorder" Property="BorderBrush" Value="#343A40"/><Setter TargetName="ButtonBorder" Property="BorderThickness" Value="1"/></Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Button.Template>
|
||||
</Button>
|
||||
</Border>
|
||||
</StackPanel>
|
||||
</Border>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
<Setter Property="ItemContainerStyle">
|
||||
<Setter.Value>
|
||||
<Style TargetType="MenuItem">
|
||||
<Setter Property="Height" Value="30"/>
|
||||
<Setter Property="Padding" Value="8,0"/>
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="MenuItem">
|
||||
<Border x:Name="ItemBorder" Background="Transparent" CornerRadius="4" Padding="{TemplateBinding Padding}">
|
||||
<Grid>
|
||||
<Grid.ColumnDefinitions><ColumnDefinition Width="24"/><ColumnDefinition Width="*"/></Grid.ColumnDefinitions>
|
||||
<Border x:Name="CheckBorder" Width="14" Height="14" HorizontalAlignment="Left" VerticalAlignment="Center"
|
||||
BorderBrush="#C8CDD4" BorderThickness="1" CornerRadius="3" Background="White">
|
||||
<Path x:Name="CheckMark" Data="M 2,6 L 5,9 L 11,3" Stroke="White" StrokeThickness="1.5" Visibility="Collapsed"/>
|
||||
</Border>
|
||||
<ContentPresenter Grid.Column="1" ContentSource="Header" VerticalAlignment="Center"/>
|
||||
</Grid>
|
||||
</Border>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsHighlighted" Value="True"><Setter TargetName="ItemBorder" Property="Background" Value="#F3F4F6"/></Trigger>
|
||||
<Trigger Property="IsChecked" Value="True">
|
||||
<Setter TargetName="CheckBorder" Property="Background" Value="#98638F"/>
|
||||
<Setter TargetName="CheckBorder" Property="BorderBrush" Value="#98638F"/>
|
||||
<Setter TargetName="CheckMark" Property="Visibility" Value="Visible"/>
|
||||
</Trigger>
|
||||
<Trigger Property="IsEnabled" Value="False">
|
||||
<Setter Property="Foreground" Value="#8A8F98"/>
|
||||
<Setter TargetName="CheckBorder" Property="Background" Value="#D5D8DE"/>
|
||||
<Setter TargetName="CheckBorder" Property="BorderBrush" Value="#D5D8DE"/>
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
</Style.Resources>
|
||||
<Setter Property="UseLayoutRounding" Value="True" />
|
||||
<Setter Property="SnapsToDevicePixels" Value="True" />
|
||||
<Setter Property="Background" Value="White" />
|
||||
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
|
||||
<Setter Property="ColumnHeaderHeight" Value="29" />
|
||||
<Setter Property="MinRowHeight" Value="28" />
|
||||
<Setter Property="CanUserAddRows" Value="False" />
|
||||
<Setter Property="AutoGenerateColumns" Value="False" />
|
||||
<Setter Property="CanUserSortColumns" Value="True" />
|
||||
<Setter Property="CanUserReorderColumns" Value="False" />
|
||||
<Setter Property="AreRowDetailsFrozen" Value="False" />
|
||||
<Setter Property="HeadersVisibility" Value="All" />
|
||||
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
|
||||
<Setter Property="VerticalContentAlignment" Value="Center" />
|
||||
<Setter Property="Foreground" Value="#343A40" />
|
||||
<Setter Property="BorderBrush" Value="#E1E4E8" />
|
||||
<Setter Property="BorderThickness" Value="1" />
|
||||
<Setter Property="VerticalGridLinesBrush" Value="#E1E4E8" />
|
||||
<Setter Property="HorizontalGridLinesBrush" Value="#E1E4E8" />
|
||||
<Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected" />
|
||||
<Setter Property="ScrollViewer.CanContentScroll" Value="true" />
|
||||
<Setter Property="ScrollViewer.PanningMode" Value="Both" />
|
||||
<Setter Property="SelectionMode" Value="Single" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<Setter Property="RowHeaderStyle" Value="{StaticResource DataGridExDefaultRowHeaderStyle}" />
|
||||
<Setter Property="RowStyle" Value="{StaticResource DataGridExDefaultRowStyle}" />
|
||||
<Setter Property="ColumnHeaderStyle" Value="{StaticResource DataGridExDefaultCellHeaderStyle}" />
|
||||
<Setter Property="CellStyle" Value="{StaticResource DataGridExDefaultCellStyle}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type local:DataGridEx}">
|
||||
<Grid>
|
||||
<Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="*"/><RowDefinition Height="Auto"/></Grid.RowDefinitions>
|
||||
<!-- 调用方可以提供批量操作内容，默认展示选择提示和列设置。 -->
|
||||
<Border x:Name="PART_ToolbarArea" Grid.Row="0" Background="#FAFAFA" BorderBrush="#E1E4E8" BorderThickness="1,1,1,0" Padding="8,5"
|
||||
Visibility="{Binding ShowToolbar, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay, Converter={StaticResource DataGridExVisibility}}">
|
||||
<DockPanel LastChildFill="True">
|
||||
<Button x:Name="PART_ColumnsButton" DockPanel.Dock="Right" Content="列设置" Padding="10,3" MinHeight="26"
|
||||
Visibility="{Binding ShowColumnSettings, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay, Converter={StaticResource DataGridExVisibility}}"/>
|
||||
<TextBlock DockPanel.Dock="Left" VerticalAlignment="Center" Margin="0,0,12,0"
|
||||
Text="{Binding SelectionSummary, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"/>
|
||||
<ContentPresenter Content="{TemplateBinding ToolbarContent}" VerticalAlignment="Center"/>
|
||||
</DockPanel>
|
||||
</Border>
|
||||
<!-- 原生 DataGrid 滚动与虚拟化宿主。 -->
|
||||
<Border x:Name="PART_TableArea" Grid.Row="1"
|
||||
Padding="{TemplateBinding Padding}"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}"
|
||||
SnapsToDevicePixels="True"
|
||||
UseLayoutRounding="True">
|
||||
<ScrollViewer x:Name="DG_ScrollViewer" Focusable="false">
|
||||
<ScrollViewer.Template>
|
||||
<ControlTemplate TargetType="{x:Type ScrollViewer}">
|
||||
<Grid>
|
||||
<Grid.ColumnDefinitions>
|
||||
<ColumnDefinition Width="Auto" />
|
||||
<ColumnDefinition Width="*" />
|
||||
<ColumnDefinition Width="Auto" />
|
||||
</Grid.ColumnDefinitions>
|
||||
<Grid.RowDefinitions>
|
||||
<RowDefinition Height="Auto" />
|
||||
<RowDefinition Height="*" />
|
||||
<RowDefinition Height="Auto" />
|
||||
</Grid.RowDefinitions>
|
||||
<Border
|
||||
Grid.Row="0"
|
||||
Grid.Column="0"
|
||||
Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
|
||||
Background="#eeeeee"
|
||||
BorderBrush="{Binding BorderBrush, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
|
||||
BorderThickness="0,0,1,1">
|
||||
<CheckBox
|
||||
Width="16"
|
||||
HorizontalAlignment="Center"
|
||||
VerticalAlignment="Center"
|
||||
HorizontalContentAlignment="Center"
|
||||
AutomationProperties.Name="全选行"
|
||||
Command="{x:Static ext:DataGridEx.ToggleSelectAllCommand}"
|
||||
CommandTarget="{Binding RelativeSource={RelativeSource AncestorType={x:Type ext:DataGridEx}}}"
|
||||
IsChecked="{Binding AreAllRowsSelected, RelativeSource={RelativeSource AncestorType={x:Type ext:DataGridEx}}, Mode=OneWay}">
|
||||
<CheckBox.Style>
|
||||
<Style TargetType="CheckBox" BasedOn="{StaticResource DataGridExCheckBoxStyle}">
|
||||
<Setter Property="Visibility" Value="Collapsed" />
|
||||
<Style.Triggers>
|
||||
<MultiDataTrigger>
|
||||
<MultiDataTrigger.Conditions>
|
||||
<Condition Binding="{Binding ShowCheckBox, RelativeSource={RelativeSource AncestorType={x:Type ext:DataGridEx}}}" Value="True" />
|
||||
<Condition Binding="{Binding ShowSelectAll, RelativeSource={RelativeSource AncestorType={x:Type ext:DataGridEx}}}" Value="True" />
|
||||
</MultiDataTrigger.Conditions>
|
||||
<Setter Property="Visibility" Value="Visible" />
|
||||
</MultiDataTrigger>
|
||||
</Style.Triggers>
|
||||
</Style>
|
||||
</CheckBox.Style>
|
||||
</CheckBox>
|
||||
</Border>
|
||||
|
||||
<DataGridColumnHeadersPresenter
|
||||
x:Name="PART_ColumnHeadersPresenter"
|
||||
Grid.Column="1"
|
||||
Grid.ColumnSpan="2"
|
||||
Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Column}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
|
||||
<Grid
|
||||
Grid.Row="1"
|
||||
Grid.Column="0"
|
||||
Grid.ColumnSpan="2">
|
||||
<ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}" />
|
||||
<Grid
|
||||
x:Name="NoDataTipsGrid"
|
||||
HorizontalAlignment="Center"
|
||||
VerticalAlignment="Center"
|
||||
IsHitTestVisible="False"
|
||||
Visibility="Collapsed">
|
||||
<Grid.RowDefinitions>
|
||||
<RowDefinition Height="60" />
|
||||
<RowDefinition Height="auto" />
|
||||
</Grid.RowDefinitions>
|
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<Path
|
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Width="100"
|
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Height="60"
|
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|
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Stretch="Fill" />
|
||||
<TextBlock
|
||||
Grid.Row="1"
|
||||
Margin="10"
|
||||
HorizontalAlignment="Center"
|
||||
VerticalAlignment="Bottom"
|
||||
FontSize="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=FontSize, Mode=OneWay}"
|
||||
Foreground="LightGray"
|
||||
Text="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=(f:DataGridHelper.NoDataTips), Mode=OneWay}" />
|
||||
</Grid>
|
||||
</Grid>
|
||||
<ScrollBar
|
||||
x:Name="PART_VerticalScrollBar"
|
||||
Grid.Row="1"
|
||||
Grid.Column="2"
|
||||
Maximum="{TemplateBinding ScrollableHeight}"
|
||||
Orientation="Vertical"
|
||||
|
||||
ViewportSize="{TemplateBinding ViewportHeight}"
|
||||
Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"
|
||||
Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" />
|
||||
<Grid Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2">
|
||||
<ScrollBar
|
||||
x:Name="PART_HorizontalScrollBar"
|
||||
Maximum="{TemplateBinding ScrollableWidth}"
|
||||
Orientation="Horizontal"
|
||||
|
||||
ViewportSize="{TemplateBinding ViewportWidth}"
|
||||
Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}"
|
||||
Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" />
|
||||
</Grid>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<MultiDataTrigger>
|
||||
<MultiDataTrigger.Conditions>
|
||||
<Condition Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=(f:DataGridHelper.IsActive)}" Value="false" />
|
||||
<Condition Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=HasItems}" Value="false" />
|
||||
</MultiDataTrigger.Conditions>
|
||||
<Setter TargetName="NoDataTipsGrid" Property="Visibility" Value="Visible" />
|
||||
</MultiDataTrigger>
|
||||
<!--<DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=(f:DataGridHelper.NoDataTips)}" Value="{x:Null}">
|
||||
<Setter TargetName="NoDataTipsGrid" Property="Visibility" Value="Collapsed" />
|
||||
</DataTrigger>
|
||||
<DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGrid}, Path=(f:DataGridHelper.NoDataTips)}" Value="">
|
||||
<Setter TargetName="NoDataTipsGrid" Property="Visibility" Value="Collapsed" />
|
||||
</DataTrigger>-->
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</ScrollViewer.Template>
|
||||
<ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
</ScrollViewer>
|
||||
</Border>
|
||||
<!-- 分页仅请求数据，不截断调用方的 ItemsSource。 -->
|
||||
<Border x:Name="PART_PaginationArea" Grid.Row="2" Background="#FAFAFA" BorderBrush="#E1E4E8" BorderThickness="1,0,1,1" Padding="8,4"
|
||||
Visibility="{Binding ShowPagination, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay, Converter={StaticResource DataGridExVisibility}}">
|
||||
<Grid>
|
||||
<ContentPresenter x:Name="PART_PaginationContent" Content="{TemplateBinding PaginationContent}"/>
|
||||
<DockPanel x:Name="PART_DefaultPagination" Visibility="Collapsed">
|
||||
<StackPanel DockPanel.Dock="Right" Orientation="Horizontal">
|
||||
<TextBlock Text="每页" VerticalAlignment="Center" Margin="0,0,6,0"/>
|
||||
<ComboBox Width="70" MinHeight="26" IsEditable="False" Margin="0,0,8,0"
|
||||
ItemsSource="{Binding PageSizes, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
|
||||
SelectedItem="{Binding PageSize, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
|
||||
<Button Content="首页" Command="{x:Static local:DataGridEx.FirstPageCommand}" Padding="8,2" Margin="0,0,4,0"/>
|
||||
<Button Content="上一页" Command="{x:Static local:DataGridEx.PreviousPageCommand}" Padding="8,2"/>
|
||||
<TextBlock Text="{Binding PageSummary, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" VerticalAlignment="Center" Margin="10,0"/>
|
||||
<Button Content="下一页" Command="{x:Static local:DataGridEx.NextPageCommand}" Padding="8,2"/>
|
||||
<Button Content="末页" Command="{x:Static local:DataGridEx.LastPageCommand}" Padding="8,2" Margin="4,0,0,0"/>
|
||||
</StackPanel>
|
||||
<TextBlock Text="{Binding TotalSummary, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}" VerticalAlignment="Center"/>
|
||||
</DockPanel>
|
||||
</Grid>
|
||||
</Border>
|
||||
<Border x:Name="PART_LoadingOverlay" Grid.RowSpan="3" Background="#DDFFFFFF" Visibility="Collapsed" Cursor="Wait">
|
||||
<StackPanel Width="180" HorizontalAlignment="Center" VerticalAlignment="Center">
|
||||
<ProgressBar x:Name="PART_LoadingProgress" Height="4" IsIndeterminate="False" Foreground="#98638F" Background="#EDE5EB" BorderThickness="0"/>
|
||||
<TextBlock Text="{TemplateBinding LoadingText}" HorizontalAlignment="Center" Margin="0,12,0,0" Foreground="#626873"
|
||||
AutomationProperties.LiveSetting="Polite"/>
|
||||
</StackPanel>
|
||||
</Border>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsLoading" Value="True">
|
||||
<Setter TargetName="PART_LoadingOverlay" Property="Visibility" Value="Visible"/>
|
||||
<Setter TargetName="PART_LoadingProgress" Property="IsIndeterminate" Value="True"/>
|
||||
<Setter TargetName="PART_ToolbarArea" Property="IsEnabled" Value="False"/>
|
||||
<Setter TargetName="PART_TableArea" Property="IsEnabled" Value="False"/>
|
||||
<Setter TargetName="PART_PaginationArea" Property="IsEnabled" Value="False"/>
|
||||
</Trigger>
|
||||
<Trigger Property="PaginationContent" Value="{x:Null}">
|
||||
<Setter TargetName="PART_DefaultPagination" Property="Visibility" Value="Visible"/>
|
||||
<Setter TargetName="PART_PaginationContent" Property="Visibility" Value="Collapsed"/>
|
||||
</Trigger>
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||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
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||||
</Setter>
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||||
<Style.Triggers>
|
||||
<MultiTrigger>
|
||||
<MultiTrigger.Conditions>
|
||||
<Condition Property="IsGrouping" Value="true" />
|
||||
<Condition Property="VirtualizingPanel.IsVirtualizingWhenGrouping" Value="false" />
|
||||
</MultiTrigger.Conditions>
|
||||
<Setter Property="ScrollViewer.CanContentScroll" Value="false" />
|
||||
</MultiTrigger>
|
||||
</Style.Triggers>
|
||||
</Style>
|
||||
|
||||
|
||||
|
||||
<Style x:Key="DataGridExCellStyle" TargetType="DataGridCell">
|
||||
<Setter Property="BorderThickness" Value="0" />
|
||||
<Setter Property="Background" Value="Transparent" />
|
||||
<Setter Property="Padding" Value="8,0" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<!--<Setter Property="Foreground" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=Foreground, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />-->
|
||||
<Setter Property="VerticalContentAlignment" Value="Center" />
|
||||
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="{x:Type DataGridCell}">
|
||||
<Grid>
|
||||
<Border
|
||||
Padding="{TemplateBinding Padding}"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}">
|
||||
<ContentPresenter
|
||||
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
|
||||
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
|
||||
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
</Border>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter Property="Background" Value="{Binding SelectedRowBackground, RelativeSource={RelativeSource AncestorType={x:Type local:DataGridEx}}}" />
|
||||
<Setter Property="Foreground" Value="{Binding SelectedRowForeground, RelativeSource={RelativeSource AncestorType={x:Type local:DataGridEx}}}" />
|
||||
</Trigger>
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
<Style x:Key="DataGridExRowStyle" TargetType="{x:Type DataGridRow}">
|
||||
<Setter Property="ContextMenu" Value="{Binding RowContextMenu, RelativeSource={RelativeSource AncestorType=local:DataGridEx}}" />
|
||||
<Setter Property="Tag" Value="{Binding DataContext, RelativeSource={RelativeSource AncestorType=local:DataGridEx}}" />
|
||||
<Setter Property="BorderThickness" Value="0,0,1,0" />
|
||||
<Setter Property="Background" Value="Transparent" />
|
||||
<Setter Property="FontSize" Value="{StaticResource DataGridExFontSize}" />
|
||||
<Setter Property="FontFamily" Value="{StaticResource DataGridExFontFamily}" />
|
||||
<Setter Property="BorderBrush" Value="{Binding RelativeSource={RelativeSource AncestorType=DataGrid, Mode=FindAncestor}, Path=BorderBrush}" />
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="DataGridRow">
|
||||
<Grid>
|
||||
<Border
|
||||
x:Name="border"
|
||||
Background="{TemplateBinding Background}"
|
||||
BorderBrush="{TemplateBinding BorderBrush}"
|
||||
BorderThickness="{TemplateBinding BorderThickness}" />
|
||||
<SelectiveScrollingGrid>
|
||||
<SelectiveScrollingGrid.ColumnDefinitions>
|
||||
<ColumnDefinition Width="Auto" />
|
||||
<ColumnDefinition Width="*" />
|
||||
</SelectiveScrollingGrid.ColumnDefinitions>
|
||||
<SelectiveScrollingGrid.RowDefinitions>
|
||||
<RowDefinition Height="*" />
|
||||
<RowDefinition Height="Auto" />
|
||||
</SelectiveScrollingGrid.RowDefinitions>
|
||||
<DataGridCellsPresenter
|
||||
Grid.Column="1"
|
||||
ItemsPanel="{TemplateBinding ItemsPanel}"
|
||||
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
|
||||
<DataGridDetailsPresenter
|
||||
x:Name="DetailsPresenter"
|
||||
Grid.Row="1"
|
||||
Grid.Column="1"
|
||||
SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
|
||||
Visibility="{TemplateBinding DetailsVisibility}" />
|
||||
<DataGridRowHeader x:Name="PART_RowHeader"
|
||||
Grid.RowSpan="2"
|
||||
SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical"
|
||||
Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" />
|
||||
</SelectiveScrollingGrid>
|
||||
<Grid
|
||||
x:Name="fousIcon"
|
||||
IsHitTestVisible="False"
|
||||
Opacity="0"
|
||||
Visibility="Collapsed">
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Top"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="0" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Right"
|
||||
VerticalAlignment="Top"
|
||||
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|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="90" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Right"
|
||||
VerticalAlignment="Bottom"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="180" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
<Path
|
||||
Width="10"
|
||||
Height="10"
|
||||
HorizontalAlignment="Left"
|
||||
VerticalAlignment="Bottom"
|
||||
Data="M0,0 L0,0 50,0 50,10 10,10 10,50 0,50 0,52 z"
|
||||
Fill="{DynamicResource PrimaryBrush}"
|
||||
RenderTransformOrigin="0.5,0.5"
|
||||
Stretch="Fill">
|
||||
<Path.RenderTransform>
|
||||
<TransformGroup>
|
||||
<ScaleTransform />
|
||||
<SkewTransform />
|
||||
<RotateTransform Angle="-90" />
|
||||
<TranslateTransform />
|
||||
</TransformGroup>
|
||||
</Path.RenderTransform>
|
||||
</Path>
|
||||
</Grid>
|
||||
</Grid>
|
||||
<ControlTemplate.Triggers>
|
||||
<Trigger Property="IsSelected" Value="True">
|
||||
<Setter TargetName="fousIcon" Property="Opacity" Value="1" />
|
||||
<Setter Property="Foreground" Value="{Binding SelectedRowForeground, RelativeSource={RelativeSource AncestorType={x:Type local:DataGridEx}}}" />
|
||||
<Setter TargetName="border" Property="Background" Value="{Binding SelectedRowBackground, RelativeSource={RelativeSource AncestorType={x:Type local:DataGridEx}}}" />
|
||||
</Trigger>
|
||||
<Trigger Property="DetailsVisibility" Value="Visible">
|
||||
<Setter TargetName="DetailsPresenter" Property="Margin" Value="0,0,1,0" />
|
||||
</Trigger>
|
||||
|
||||
</ControlTemplate.Triggers>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
<Style x:Key="DataGridExRowHeaderStyle" BasedOn="{StaticResource DataGridExDefaultRowHeaderStyle}" TargetType="DataGridRowHeader">
|
||||
<Setter Property="Template">
|
||||
<Setter.Value>
|
||||
<ControlTemplate TargetType="DataGridRowHeader">
|
||||
<Border Background="Transparent" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0,0,1,1">
|
||||
<CheckBox Style="{StaticResource DataGridExCheckBoxStyle}" HorizontalAlignment="Center" VerticalAlignment="Center" AutomationProperties.Name="选择行"
|
||||
IsChecked="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=DataGridRow}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
|
||||
</Border>
|
||||
</ControlTemplate>
|
||||
</Setter.Value>
|
||||
</Setter>
|
||||
</Style>
|
||||
|
||||
<Style
|
||||
x:Key="DataGridExNumberCellStyle"
|
||||
BasedOn="{StaticResource DataGridExCellStyle}"
|
||||
TargetType="DataGridCell">
|
||||
<Setter Property="HorizontalContentAlignment" Value="Right" />
|
||||
</Style>
|
||||
|
||||
<Style BasedOn="{StaticResource DataGridExDefaultDataGridStyle}" TargetType="local:DataGridEx">
|
||||
<Setter Property="EnableRowVirtualization" Value="True" />
|
||||
<Setter Property="EnableColumnVirtualization" Value="True" />
|
||||
<Setter Property="VirtualizingPanel.IsVirtualizing" Value="True" />
|
||||
<Setter Property="VirtualizingPanel.VirtualizationMode" Value="Recycling" />
|
||||
<Setter Property="ScrollViewer.CanContentScroll" Value="True" />
|
||||
|
||||
<Setter Property="SelectionMode" Value="Extended" />
|
||||
<Setter Property="SelectionUnit" Value="FullRow" />
|
||||
<Setter Property="RowStyle" Value="{StaticResource DataGridExRowStyle}" />
|
||||
<Setter Property="CellStyle" Value="{StaticResource DataGridExCellStyle}" />
|
||||
<Setter Property="RowHeaderStyle" Value="{StaticResource DataGridExRowHeaderStyle}" />
|
||||
</Style>
|
||||
|
||||
</ResourceDictionary>
|
||||
@@ -0,0 +1,169 @@
|
||||
using System.Diagnostics;
|
||||
using System.IO;
|
||||
using System.Net.Http;
|
||||
using System.Windows.Controls;
|
||||
using System.Windows.Data;
|
||||
using System.Windows.Media.Imaging;
|
||||
using System.Windows.Media;
|
||||
using System.Windows;
|
||||
|
||||
namespace Store.Management.Framework.Controls;
|
||||
|
||||
/// <summary>配套图片列：自动使用所属 DataGridEx 的拖动暂停和图片缓存能力。</summary>
|
||||
public class DataGridExImageColumn : DataGridBoundColumn
|
||||
{
|
||||
private static readonly Style DefaultImageStyle = CreateDefaultStyle();
|
||||
/// <summary>可选的逐行占位图；未设置时显示空白。</summary>
|
||||
public BindingBase? PlaceholderBinding { get; set; }
|
||||
|
||||
protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)
|
||||
{
|
||||
var image = new NetworkThumbnail { Style = ElementStyle ?? DefaultImageStyle };
|
||||
if (Binding != null) BindingOperations.SetBinding(image, NetworkThumbnail.UrlProperty, Binding);
|
||||
if (PlaceholderBinding != null)
|
||||
BindingOperations.SetBinding(image, NetworkThumbnail.PlaceholderProperty, PlaceholderBinding);
|
||||
return image;
|
||||
}
|
||||
protected override FrameworkElement GenerateEditingElement(DataGridCell cell, object dataItem) => GenerateElement(cell, dataItem);
|
||||
private static Style CreateDefaultStyle()
|
||||
{
|
||||
var style = new Style(typeof(NetworkThumbnail));
|
||||
style.Setters.Add(new Setter(FrameworkElement.WidthProperty, 58d));
|
||||
style.Setters.Add(new Setter(FrameworkElement.HeightProperty, 58d));
|
||||
style.Setters.Add(new Setter(System.Windows.Controls.Image.StretchProperty, Stretch.Uniform));
|
||||
style.Seal(); return style;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>仅为已生成的可见单元格加载图片；回收时取消，避免旧图片覆盖新行。</summary>
|
||||
public sealed class NetworkThumbnail : Image
|
||||
{
|
||||
public static readonly DependencyProperty CacheEnabledProperty = DependencyProperty.RegisterAttached("CacheEnabled", typeof(bool), typeof(NetworkThumbnail), new FrameworkPropertyMetadata(true, FrameworkPropertyMetadataOptions.Inherits, Changed));
|
||||
public static bool GetCacheEnabled(DependencyObject target) => (bool)target.GetValue(CacheEnabledProperty);
|
||||
public static void SetCacheEnabled(DependencyObject target, bool value) => target.SetValue(CacheEnabledProperty, value);
|
||||
|
||||
public static readonly DependencyProperty IsLoadingSuspendedProperty = DependencyProperty.RegisterAttached(
|
||||
"IsLoadingSuspended", typeof(bool), typeof(NetworkThumbnail),
|
||||
new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.Inherits, SuspensionChanged));
|
||||
public static bool GetIsLoadingSuspended(DependencyObject target) => (bool)target.GetValue(IsLoadingSuspendedProperty);
|
||||
public static void SetIsLoadingSuspended(DependencyObject target, bool value) => target.SetValue(IsLoadingSuspendedProperty, value);
|
||||
|
||||
private static void SuspensionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
if (d is not NetworkThumbnail image) return;
|
||||
image.CancelLoading();
|
||||
image.Source = null;
|
||||
if (!(bool)e.NewValue) image.QueueRefresh();
|
||||
}
|
||||
|
||||
public static readonly DependencyProperty UrlProperty = DependencyProperty.Register(nameof(Url), typeof(string), typeof(NetworkThumbnail), new PropertyMetadata(null, Changed));
|
||||
public static readonly DependencyProperty PlaceholderProperty = DependencyProperty.Register(nameof(Placeholder), typeof(ImageSource), typeof(NetworkThumbnail), new PropertyMetadata(null, Changed));
|
||||
public string? Url { get => (string?)GetValue(UrlProperty); set => SetValue(UrlProperty, value); }
|
||||
public ImageSource? Placeholder { get => (ImageSource?)GetValue(PlaceholderProperty); set => SetValue(PlaceholderProperty, value); }
|
||||
private CancellationTokenSource? loading;
|
||||
private bool refreshPending;
|
||||
|
||||
public NetworkThumbnail()
|
||||
{
|
||||
Loaded += (_, _) => QueueRefresh();
|
||||
Unloaded += (_, _) => CancelLoading();
|
||||
}
|
||||
private static void Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
|
||||
{
|
||||
if (d is not NetworkThumbnail image) return;
|
||||
image.CancelLoading();
|
||||
image.Source = GetIsLoadingSuspended(image) ? null : image.Placeholder;
|
||||
// 回收行时多个绑定会依次变更，等本轮绑定完成后只加载一次新 URL。
|
||||
image.QueueRefresh();
|
||||
}
|
||||
private void QueueRefresh()
|
||||
{
|
||||
if (!IsLoaded || refreshPending) return;
|
||||
refreshPending = true;
|
||||
Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Loaded, new Action(() =>
|
||||
{
|
||||
refreshPending = false;
|
||||
if (IsLoaded) StartLoading();
|
||||
}));
|
||||
}
|
||||
private void CancelLoading()
|
||||
{
|
||||
loading?.Cancel(); loading?.Dispose(); loading = null;
|
||||
}
|
||||
private async void StartLoading()
|
||||
{
|
||||
CancelLoading(); ToolTip = null;
|
||||
if (GetIsLoadingSuspended(this)) { Source = null; return; }
|
||||
Source = Placeholder;
|
||||
if (string.IsNullOrWhiteSpace(Url)) return;
|
||||
var request = new CancellationTokenSource(); loading = request;
|
||||
var token = request.Token;
|
||||
try
|
||||
{
|
||||
var bitmap = await ThumbnailLoader.LoadAsync(Url, GetCacheEnabled(this), token);
|
||||
if (!token.IsCancellationRequested && ReferenceEquals(loading, request)) Source = bitmap;
|
||||
}
|
||||
catch (OperationCanceledException) when (token.IsCancellationRequested) { }
|
||||
catch (Exception ex)
|
||||
{
|
||||
if (!token.IsCancellationRequested && ReferenceEquals(loading, request)) ToolTip = $"图片加载失败：{ex.Message}";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
internal static class ThumbnailLoader
|
||||
{
|
||||
private static readonly HttpClient Client = new() { Timeout = TimeSpan.FromSeconds(12) };
|
||||
private static readonly SemaphoreSlim Slots = new(4);
|
||||
private static readonly object CacheLock = new();
|
||||
private static readonly Dictionary<string, BitmapSource> Cache = new();
|
||||
private static readonly Queue<string> CacheOrder = new();
|
||||
private static long started, succeeded, failed, canceled, cacheHits, bytes, totalTicks;
|
||||
private static int active, pending;
|
||||
public static int Pending => Volatile.Read(ref pending);
|
||||
public static string Statistics => $"网络图片：请求 {Interlocked.Read(ref started)} / 成功 {Interlocked.Read(ref succeeded)} / 失败 {Interlocked.Read(ref failed)} / 取消 {Interlocked.Read(ref canceled)} / 缓存命中 {Interlocked.Read(ref cacheHits)} | 活跃 {Volatile.Read(ref active)}，待完成 {Pending} | 下载 {Interlocked.Read(ref bytes) / 1024d:N0} KB | 成功平均 {AverageMilliseconds:N0} ms";
|
||||
private static double AverageMilliseconds => Interlocked.Read(ref succeeded) == 0 ? 0 : Interlocked.Read(ref totalTicks) * 1000d / Stopwatch.Frequency / Interlocked.Read(ref succeeded);
|
||||
|
||||
public static async Task<BitmapSource> LoadAsync(string url, bool cacheEnabled, CancellationToken token)
|
||||
{
|
||||
var cacheKey = url;
|
||||
lock (CacheLock)
|
||||
if (cacheEnabled && Cache.TryGetValue(cacheKey, out var cached)) { Interlocked.Increment(ref cacheHits); return cached; }
|
||||
Interlocked.Increment(ref pending);
|
||||
var acquired = false;
|
||||
try
|
||||
{
|
||||
await Slots.WaitAsync(token).ConfigureAwait(false); acquired = true;
|
||||
Interlocked.Increment(ref active); Interlocked.Increment(ref started);
|
||||
var watch = Stopwatch.StartNew();
|
||||
var data = await Client.GetByteArrayAsync(url, token).ConfigureAwait(false);
|
||||
Interlocked.Add(ref bytes, data.Length);
|
||||
var bitmap = await Task.Run(() =>
|
||||
{
|
||||
token.ThrowIfCancellationRequested();
|
||||
using var stream = new MemoryStream(data);
|
||||
var image = new BitmapImage(); image.BeginInit(); image.CacheOption = BitmapCacheOption.OnLoad;
|
||||
image.DecodePixelWidth = 72; image.StreamSource = stream; image.EndInit(); image.Freeze();
|
||||
return image;
|
||||
}, token).ConfigureAwait(false);
|
||||
token.ThrowIfCancellationRequested();
|
||||
lock (CacheLock)
|
||||
{
|
||||
if (cacheEnabled && !Cache.ContainsKey(cacheKey))
|
||||
{
|
||||
if (Cache.Count >= 128) Cache.Remove(CacheOrder.Dequeue());
|
||||
Cache.Add(cacheKey, bitmap); CacheOrder.Enqueue(cacheKey);
|
||||
}
|
||||
}
|
||||
Interlocked.Increment(ref succeeded); Interlocked.Add(ref totalTicks, watch.ElapsedTicks);
|
||||
return bitmap;
|
||||
}
|
||||
catch (OperationCanceledException) when (token.IsCancellationRequested) { Interlocked.Increment(ref canceled); throw; }
|
||||
catch { Interlocked.Increment(ref failed); throw; }
|
||||
finally
|
||||
{
|
||||
if (acquired) { Interlocked.Decrement(ref active); Slots.Release(); }
|
||||
Interlocked.Decrement(ref pending);
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user