refactor some controls
TimeBar, Steps, PopupWindow, Growl, Carousel
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using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Linq;
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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.Input;
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using System.Windows.Markup;
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using System.Windows.Media;
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using System.Windows.Threading;
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using HandyControl.Interactivity;
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using HandyControl.Tools;
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namespace HandyControl.Controls
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{
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/// <summary>
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/// 轮播控件
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/// </summary>
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[DefaultProperty("Items")]
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[ContentProperty("Items")]
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[TemplatePart(Name = ElementPanelPage, Type = typeof(Panel))]
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[TemplatePart(Name = ElementItemsControl, Type = typeof(ItemsPresenter))]
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public class Carousel : ListBox
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{
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#region Constants
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private const string ElementPanelPage = "PART_PanelPage";
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private const string ElementItemsControl = "PART_ItemsControl";
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#endregion Constants
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#region Data
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private Panel _panelPage;
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private bool _appliedTemplate;
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private ItemsPresenter _itemsControl;
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#endregion Data
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public override void OnApplyTemplate()
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{
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_appliedTemplate = false;
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_panelPage?.RemoveHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonPages_OnClick));
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base.OnApplyTemplate();
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_itemsControl = GetTemplateChild(ElementItemsControl) as ItemsPresenter;
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_panelPage = GetTemplateChild(ElementPanelPage) as Panel;
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CheckNull();
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_panelPage.AddHandler(ButtonBase.ClickEvent, new RoutedEventHandler(ButtonPages_OnClick));
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_appliedTemplate = true;
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Update();
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}
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private void Update()
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{
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TimerSwitch(AutoRun);
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UpdatePageButtons();
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}
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private void CheckNull()
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{
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if (_itemsControl == null || _panelPage == null) throw new Exception();
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}
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public static readonly DependencyProperty AutoRunProperty = DependencyProperty.Register(
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"AutoRun", typeof(bool), typeof(Carousel), new PropertyMetadata(default(bool), (o, args) =>
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{
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var ctl = (Carousel)o;
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ctl.TimerSwitch((bool)args.NewValue);
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}));
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public static readonly DependencyProperty IntervalProperty = DependencyProperty.Register(
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"Interval", typeof(TimeSpan), typeof(Carousel), new PropertyMetadata(TimeSpan.FromSeconds(2)));
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public static readonly DependencyProperty ExtendWidthProperty = DependencyProperty.Register(
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"ExtendWidth", typeof(double), typeof(Carousel), new PropertyMetadata(default(double)));
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public double ExtendWidth
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{
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get => (double)GetValue(ExtendWidthProperty);
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set => SetValue(ExtendWidthProperty, value);
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}
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public static readonly DependencyProperty IsCenterProperty = DependencyProperty.Register(
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"IsCenter", typeof(bool), typeof(Carousel), new PropertyMetadata(default(bool)));
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public bool IsCenter
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{
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get => (bool)GetValue(IsCenterProperty);
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set => SetValue(IsCenterProperty, value);
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}
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private int _pageIndex;
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private Button _selectedButton;
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private DispatcherTimer _updateTimer;
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private readonly List<double> _widthList = new List<double>();
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public Carousel()
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{
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CommandBindings.Add(new CommandBinding(ControlCommands.Prev, ButtonPrev_OnClick));
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CommandBindings.Add(new CommandBinding(ControlCommands.Next, ButtonNext_OnClick));
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CommandBindings.Add(new CommandBinding(ControlCommands.Selected, ButtonPages_OnClick));
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Loaded += (s, e) => UpdatePageButtons();
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}
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protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
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{
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base.OnItemsChanged(e);
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UpdatePageButtons();
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}
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/// <summary>
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/// 是否自动跳转
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/// </summary>
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public bool AutoRun
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{
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get => (bool)GetValue(AutoRunProperty);
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set => SetValue(AutoRunProperty, value);
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}
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/// <summary>
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/// 跳转时间间隔
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/// </summary>
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public TimeSpan Interval
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{
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get => (TimeSpan)GetValue(IntervalProperty);
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set => SetValue(IntervalProperty, value);
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}
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/// <summary>
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/// 页码
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/// </summary>
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public int PageIndex
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{
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get => _pageIndex;
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set
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{
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if (Items.Count == 0) return;
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if (_pageIndex == value) return;
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if (value < 0)
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_pageIndex = Items.Count - 1;
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else if (value >= Items.Count)
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_pageIndex = 0;
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else
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_pageIndex = value;
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UpdatePageButtons(_pageIndex);
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}
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}
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/// <summary>
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/// 计时器开关
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/// </summary>
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private void TimerSwitch(bool run)
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{
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if (!_appliedTemplate) return;
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if (run)
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{
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_updateTimer = new DispatcherTimer
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{
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Interval = Interval
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};
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_updateTimer.Tick += UpdateTimer_Tick;
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_updateTimer.Start();
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}
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else
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{
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if (_updateTimer != null)
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{
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_updateTimer.Tick -= UpdateTimer_Tick;
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_updateTimer.Stop();
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_updateTimer = null;
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}
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}
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}
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private void UpdateTimer_Tick(object sender, EventArgs e)
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{
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if (IsMouseOver) return;
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PageIndex++;
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}
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/// <summary>
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/// 更新页按钮
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/// </summary>
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public void UpdatePageButtons(int? index = null)
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{
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if (!_appliedTemplate) return;
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if (index == null)
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{
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var count = Items.Count;
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_widthList.Clear();
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_widthList.Add(0);
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var width = .0;
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foreach (FrameworkElement item in Items)
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{
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item.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
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width += item.DesiredSize.Width;
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_widthList.Add(width);
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}
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_itemsControl.Width = _widthList.Last() + ExtendWidth;
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_panelPage.Children.Clear();
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for (var i = 0; i < count; i++)
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_panelPage.Children.Add(CreatePateButton());
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if (count > 0)
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{
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var button = _panelPage.Children[0];
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button.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent, button));
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}
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}
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else
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{
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if (index >= 0 && index < _panelPage.Children.Count)
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{
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var button = _panelPage.Children[(int)index];
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button.RaiseEvent(new RoutedEventArgs(ButtonBase.ClickEvent, button));
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UpdateItemsPosition();
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}
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}
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}
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/// <summary>
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/// 更新项的位置
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/// </summary>
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private void UpdateItemsPosition()
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{
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if (!_appliedTemplate) return;
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if (Items.Count == 0) return;
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if (!IsCenter)
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{
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_itemsControl.BeginAnimation(MarginProperty,
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AnimationHelper.CreateAnimation(new Thickness(-_widthList[PageIndex], 0, 0, 0)));
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}
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else
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{
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var ctl = (FrameworkElement)Items[PageIndex];
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var ctlWidth = ctl.DesiredSize.Width;
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_itemsControl.BeginAnimation(MarginProperty,
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AnimationHelper.CreateAnimation(
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new Thickness(-_widthList[PageIndex] + (ActualWidth - ctlWidth) / 2, 0, 0, 0)));
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}
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}
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protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
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{
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base.OnRenderSizeChanged(sizeInfo);
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UpdateItemsPosition();
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}
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/// <summary>
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/// 创建页按钮
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/// </summary>
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/// <returns></returns>
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private Button CreatePateButton()
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{
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var button = new Button
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{
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Style = TryFindResource("ButtonCustom") as Style,
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Content = new Border
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{
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Width = 10,
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Height = 10,
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CornerRadius = new CornerRadius(5),
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Background = Brushes.White,
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Margin = new Thickness(5, 0, 5, 0),
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BorderThickness = new Thickness(1),
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BorderBrush = TryFindResource("PrimaryBrush") as Brush
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}
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};
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return button;
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}
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private void ButtonPages_OnClick(object sender, RoutedEventArgs e)
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{
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if (_selectedButton != null && _selectedButton.Content is Border borderOri)
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borderOri.Background = Brushes.White;
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_selectedButton = e.OriginalSource as Button;
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if (_selectedButton != null && _selectedButton.Content is Border border)
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border.Background = TryFindResource("PrimaryBrush") as Brush;
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var index = _panelPage.Children.IndexOf(_selectedButton);
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if (index != -1)
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PageIndex = index;
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}
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private void ButtonPrev_OnClick(object sender, RoutedEventArgs e) => PageIndex--;
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private void ButtonNext_OnClick(object sender, RoutedEventArgs e) => PageIndex++;
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}
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}
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