38 lines
1.1 KiB
C#
38 lines
1.1 KiB
C#
using System.Windows;
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using System.Windows.Input;
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namespace WpfStyleableWindow.StyleableWindow
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{
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public static class WindowDragBehavior
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{
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public static readonly DependencyProperty LeftMouseButtonDrag = DependencyProperty.RegisterAttached("LeftMouseButtonDrag", typeof(Window), typeof(WindowDragBehavior), new UIPropertyMetadata(null, OnLeftMouseButtonDragChanged));
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public static Window GetLeftMouseButtonDrag(DependencyObject obj)
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{
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return (Window)obj.GetValue(LeftMouseButtonDrag);
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}
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public static void SetLeftMouseButtonDrag(DependencyObject obj, Window window)
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{
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obj.SetValue(LeftMouseButtonDrag, window);
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}
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private static void OnLeftMouseButtonDragChanged(object sender, DependencyPropertyChangedEventArgs e)
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{
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if (sender is UIElement uIElement)
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{
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uIElement.MouseLeftButtonDown += buttonDown;
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}
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}
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private static void buttonDown(object sender, MouseButtonEventArgs e)
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{
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UIElement uIElement = sender as UIElement;
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if (uIElement.GetValue(LeftMouseButtonDrag) is Window window)
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{
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window.DragMove();
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}
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}
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}
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}
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