add SplitButton

src/Shared/HandyControl_Shared/Controls/Button/SplitButton.cs

@@ -0,0 +1,81 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Input;
+using HandyControl.Data;
+using HandyControl.Data.Enum;
+
+namespace HandyControl.Controls
+{
+    public class SplitButton : ButtonBase
+    {
+        public static readonly DependencyProperty HitModeProperty = DependencyProperty.Register(
+            "HitMode", typeof(MouseHitMode), typeof(SplitButton), new PropertyMetadata(default(MouseHitMode)));
+
+        public MouseHitMode HitMode
+        {
+            get => (MouseHitMode) GetValue(HitModeProperty);
+            set => SetValue(HitModeProperty, value);
+        }
+
+        public static readonly DependencyProperty MaxDropDownHeightProperty = DependencyProperty.Register(
+            "MaxDropDownHeight", typeof(double), typeof(SplitButton), new PropertyMetadata(SystemParameters.PrimaryScreenHeight / 3.0));
+
+        public double MaxDropDownHeight
+        {
+            get => (double) GetValue(MaxDropDownHeightProperty);
+            set => SetValue(MaxDropDownHeightProperty, value);
+        }
+
+        public static readonly DependencyProperty IsDropDownOpenProperty = DependencyProperty.Register(
+            "IsDropDownOpen", typeof(bool), typeof(SplitButton), new PropertyMetadata(ValueBoxes.FalseBox));
+
+        public bool IsDropDownOpen
+        {
+            get => (bool) GetValue(IsDropDownOpenProperty);
+            set => SetValue(IsDropDownOpenProperty, value);
+        }
+
+        public static readonly DependencyProperty DropDownContentProperty = DependencyProperty.Register(
+            "DropDownContent", typeof(object), typeof(SplitButton), new PropertyMetadata(default(object)));
+
+        public object DropDownContent
+        {
+            get => GetValue(DropDownContentProperty);
+            set => SetValue(DropDownContentProperty, value);
+        }
+
+        public SplitButton()
+        {
+            AddHandler(MenuItem.ClickEvent, new RoutedEventHandler(ItemsOnClick));
+        }
+
+        private void ItemsOnClick(object sender, RoutedEventArgs e)
+        {
+            if (e.OriginalSource is MenuItem)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.FalseBox);
+            }
+        }
+
+        protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
+        {
+            base.OnPreviewMouseLeftButtonDown(e);
+
+            if (HitMode == MouseHitMode.Hover)
+            {
+                e.Handled = true;
+            }
+        }
+
+        protected override void OnMouseEnter(MouseEventArgs e)
+        {
+            base.OnMouseEnter(e);
+
+            if (HitMode == MouseHitMode.Hover)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.TrueBox);
+            }
+        }
+    }
+}