Separate version

Net40/HandyControl_Net40/Controls/TabControl/TabControl.cs

@@ -0,0 +1,227 @@
+using System;
+using System.Collections.Specialized;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using HandyControl.Data;
+using HandyControl.Tools.Extension;
+
+namespace HandyControl.Controls
+{
+    [TemplatePart(Name = OverflowButtonKey, Type = typeof(ContextMenuToggleButton))]
+    [TemplatePart(Name = HeaderPanelKey, Type = typeof(TabPanel))]
+    public class TabControl : System.Windows.Controls.TabControl
+    {
+        private const string OverflowButtonKey = "PART_OverflowButton";
+
+        private const string HeaderPanelKey = "PART_HeaderPanel";
+
+        private ContextMenuToggleButton _buttonOverflow;
+
+        private TabPanel _headerPanel;
+
+        /// <summary>
+        ///     是否为内部操作
+        /// </summary>
+        internal bool IsInternalAction;
+
+        /// <summary>
+        ///     是否启用动画
+        /// </summary>
+        public static readonly DependencyProperty IsEnableAnimationProperty = DependencyProperty.Register(
+            "IsEnableAnimation", typeof(bool), typeof(TabControl), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        /// <summary>
+        ///     是否启用动画
+        /// </summary>
+        public bool IsEnableAnimation
+        {
+            get => (bool)GetValue(IsEnableAnimationProperty);
+            set => SetValue(IsEnableAnimationProperty, value);
+        }
+
+        /// <summary>
+        ///     是否可以拖动
+        /// </summary>
+        public static readonly DependencyProperty IsDraggableProperty = DependencyProperty.Register(
+            "IsDraggable", typeof(bool), typeof(TabControl), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        /// <summary>
+        ///     是否可以拖动
+        /// </summary>
+        public bool IsDraggable
+        {
+            get => (bool)GetValue(IsDraggableProperty);
+            set => SetValue(IsDraggableProperty, value);
+        }
+
+        /// <summary>
+        ///     是否显示关闭按钮
+        /// </summary>
+        public static readonly DependencyProperty ShowCloseButtonProperty = DependencyProperty.Register(
+            "ShowCloseButton", typeof(bool), typeof(TabControl), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        /// <summary>
+        ///     是否显示关闭按钮
+        /// </summary>
+        public bool ShowCloseButton
+        {
+            get => (bool)GetValue(ShowCloseButtonProperty);
+            set => SetValue(ShowCloseButtonProperty, value);
+        }
+
+        /// <summary>
+        ///     是否将标签填充
+        /// </summary>
+        public static readonly DependencyProperty IsEnableTabFillProperty = DependencyProperty.Register(
+            "IsEnableTabFill", typeof(bool), typeof(TabControl), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        /// <summary>
+        ///     是否将标签填充
+        /// </summary>
+        public bool IsEnableTabFill
+        {
+            get => (bool)GetValue(IsEnableTabFillProperty);
+            set => SetValue(IsEnableTabFillProperty, value);
+        }
+
+        /// <summary>
+        ///     标签宽度
+        /// </summary>
+        public static readonly DependencyProperty TabItemWidthProperty = DependencyProperty.Register(
+            "TabItemWidth", typeof(double), typeof(TabControl), new PropertyMetadata(200.0));
+
+        /// <summary>
+        ///     标签宽度
+        /// </summary>
+        public double TabItemWidth
+        {
+            get => (double)GetValue(TabItemWidthProperty);
+            set => SetValue(TabItemWidthProperty, value);
+        }
+
+        /// <summary>
+        ///     标签高度
+        /// </summary>
+        public static readonly DependencyProperty TabItemHeightProperty = DependencyProperty.Register(
+            "TabItemHeight", typeof(double), typeof(TabControl), new PropertyMetadata(30.0));
+
+        /// <summary>
+        ///     标签高度
+        /// </summary>
+        public double TabItemHeight
+        {
+            get => (double)GetValue(TabItemHeightProperty);
+            set => SetValue(TabItemHeightProperty, value);
+        }
+
+        /// <summary>
+        ///     可见的标签数量
+        /// </summary>
+        private int _itemShowCount;
+
+        protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
+        {
+            base.OnItemsChanged(e);
+
+            if (_headerPanel == null)
+            {
+                IsInternalAction = false;
+                return;
+            }
+
+            if (!IsEnableTabFill)
+            {
+                _itemShowCount = (int)(ActualWidth / TabItemWidth);
+                _buttonOverflow.Show(Items.Count > 0  && Items.Count >= _itemShowCount);
+            }
+
+            if (IsInternalAction)
+            {
+                IsInternalAction = false;
+                return;
+            }
+            if (IsEnableAnimation)
+            {
+                _headerPanel.ClearValue(TabPanel.FluidMoveDurationProperty);
+            }
+            else
+            {
+                _headerPanel.FluidMoveDuration = new Duration(TimeSpan.FromSeconds(0));
+            }
+            if (e.Action == NotifyCollectionChangedAction.Add)
+            {
+                foreach (TabItem item in e.NewItems)
+                {
+                    item.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
+                    item.IsSelected = true;
+                    item.TabPanel = _headerPanel;
+                }
+            }
+            IsInternalAction = false;
+        }
+
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+            _headerPanel = Template.FindName(HeaderPanelKey, this) as TabPanel;
+
+            if (IsEnableTabFill) return;
+
+            _buttonOverflow = Template.FindName(OverflowButtonKey, this) as ContextMenuToggleButton;
+            if (_buttonOverflow != null)
+            {
+                _itemShowCount = (int)(ActualWidth / TabItemWidth);
+                _buttonOverflow.Show(Items.Count > 0 && Items.Count >= _itemShowCount);
+
+                var menu = new ContextMenu
+                {
+                    Placement = PlacementMode.Bottom,
+                    PlacementTarget = _buttonOverflow
+                };
+                menu.Closed += (s, e) => _buttonOverflow.IsChecked = false;
+                _buttonOverflow.Menu = menu;
+                _buttonOverflow.Click += (s, e) =>
+                {
+                    if (_buttonOverflow.IsChecked == true)
+                    {
+                        _buttonOverflow.Menu.Items.Clear();
+                        foreach (TabItem item in Items)
+                        {
+                            var menuItem = new MenuItem
+                            {
+                                Header = item.Header,
+                                Width = TabItemWidth,
+                                IsChecked = item.IsSelected,
+                                IsCheckable = true
+                            };
+                            menuItem.Click += delegate
+                            {
+                                _buttonOverflow.IsChecked = false;
+                                var index = Items.IndexOf(item);
+                                if (index >= _itemShowCount)
+                                {
+                                    Items.Remove(item);
+                                    Items.Insert(0, item);
+                                    if (IsEnableAnimation)
+                                    {
+                                        _headerPanel.ClearValue(TabPanel.FluidMoveDurationProperty);
+                                    }
+                                    else
+                                    {
+                                        _headerPanel.FluidMoveDuration = new Duration(TimeSpan.FromSeconds(0));
+                                    }
+                                    _headerPanel.ForceUpdate = true;
+                                    _headerPanel.Measure(new Size(_headerPanel.DesiredSize.Width, ActualHeight));
+                                    _headerPanel.ForceUpdate = false;
+                                }
+                                item.IsSelected = true;
+                            };
+                            _buttonOverflow.Menu.Items.Add(menuItem);
+                        }
+                    }
+                };
+            }
+        }
+    }
+}