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chore: add IsDisabled prop for ScrollViewerAttach.

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This commit is contained in:
NaBian 2022-06-08 22:48:34 +08:00
parent 589c07f156
commit 7b68692509
1 changed files with 53 additions and 8 deletions
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61
src/Shared/HandyControl_Shared/Controls/Attach/ScrollViewerAttach.cs
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@ -1,7 +1,9 @@
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using HandyControl.Data;
using HandyControl.Tools;
namespace HandyControl.Controls;
@ -30,21 +32,21 @@ public class ScrollViewerAttach
{
if ((Orientation) e.NewValue == Orientation.Horizontal)
{
scrollViewer.PreviewMouseWheel += ScrollViewer_PreviewMouseWheel;
scrollViewer.PreviewMouseWheel += ScrollViewerPreviewMouseWheel;
}
else
{
scrollViewer.PreviewMouseWheel -= ScrollViewer_PreviewMouseWheel;
scrollViewer.PreviewMouseWheel -= ScrollViewerPreviewMouseWheel;
}
}
}
private static void ScrollViewer_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e)
{
var scrollViewer = (System.Windows.Controls.ScrollViewer) sender;
scrollViewer.ScrollToHorizontalOffset(Math.Min(Math.Max(0, scrollViewer.HorizontalOffset - e.Delta), scrollViewer.ScrollableWidth));
void ScrollViewerPreviewMouseWheel(object sender, MouseWheelEventArgs args)
{
var scrollViewerNative = (System.Windows.Controls.ScrollViewer) sender;
scrollViewerNative.ScrollToHorizontalOffset(Math.Min(Math.Max(0, scrollViewerNative.HorizontalOffset - args.Delta), scrollViewerNative.ScrollableWidth));
e.Handled = true;
args.Handled = true;
}
}
public static void SetOrientation(DependencyObject element, Orientation value)
@ -52,4 +54,47 @@ public class ScrollViewerAttach
public static Orientation GetOrientation(DependencyObject element)
=> (Orientation) element.GetValue(OrientationProperty);
public static readonly DependencyProperty IsDisabledProperty = DependencyProperty.RegisterAttached(
"IsDisabled", typeof(bool), typeof(ScrollViewerAttach), new PropertyMetadata(ValueBoxes.FalseBox, OnIsDisabledChanged));
private static void OnIsDisabledChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (d is UIElement element)
{
if ((bool)e.NewValue)
{
element.PreviewMouseWheel += ScrollViewerPreviewMouseWheel;
}
else
{
element.PreviewMouseWheel -= ScrollViewerPreviewMouseWheel;
}
}
void ScrollViewerPreviewMouseWheel(object sender, MouseWheelEventArgs args)
{
if (args.Handled)
{
return;
}
args.Handled = true;
if (VisualHelper.GetParent<System.Windows.Controls.ScrollViewer>((UIElement) sender) is { } scrollViewer)
{
scrollViewer.RaiseEvent(new MouseWheelEventArgs(args.MouseDevice, args.Timestamp, args.Delta)
{
RoutedEvent = UIElement.MouseWheelEvent,
Source = sender
});
}
}
}
public static void SetIsDisabled(DependencyObject element, bool value)
=> element.SetValue(IsDisabledProperty, ValueBoxes.BooleanBox(value));
public static bool GetIsDisabled(DependencyObject element)
=> (bool) element.GetValue(IsDisabledProperty);
}