PreviewMouseLeftButtonDown防止SelectionChanged事件
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我在画布上有ListBoxItems。我可以使用ScrollViewer通过一些Mouse事件在画布上拖动和滚动视图。这些鼠标事件似乎会覆盖嵌套在ScrollViewer中的ListBox的SelectionChanged事件，或者永远不会做出选择，因为鼠标事件会在ListBox捕获之前捕获单击。如果有人对这个问题有任何解决方案，将不胜感激。感谢您的时间，这是我的代码。
XAML：
<ScrollViewer x:Name=\"objScrollViewer\"
Grid.Row=\"0\"
Grid.Column=\"1\"
VerticalScrollBarVisibility=\"Hidden\"
HorizontalScrollBarVisibility=\"Hidden\"
HorizontalAlignment=\"Stretch\"
VerticalAlignment=\"Stretch\"
MouseLeftButtonUp =\"OnMouseLeftButtonUp\"
PreviewMouseLeftButtonUp =\"OnMouseLeftButtonUp\"
PreviewMouseLeftButtonDown=\"OnPreviewMouseLeftButtonDown\"
PreviewMouseMove=\"OnPreviewMouseMove\"
PreviewMouseUp=\"OnPreviewMouseUp\"
ScrollChanged=\"OnScrollViewerScrollChanged\">
<ListBox x:Name=\"objCoreViewer\"
ItemsSource=\"{Binding ItemsSource}\"
Background=\"Transparent\"
SelectionChanged=\"objCoreViewer_SelectionChanged\"
ItemTemplateSelector=\"{DynamicResource CoreViewerDataTemplateSelector}\"
ItemContainerStyleSelector=\"{DynamicResource ItemContainerStyleSelector}\"
PreviewMouseWheel=\"objCoreViewer_PreviewMouseWheel\">
<!-- Core Map Canvas -->
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<local:CoreViewerCanvas x:Name=\"objCoreViewerCanvas\"
Background=\"Transparent\"
ClipToBounds=\"True\">
<local:CoreViewerCanvas.LayoutTransform>
<ScaleTransform ScaleX=\"{Binding Path=Value, ElementName=ZoomSlider}\"
ScaleY=\"{Binding Path=Value, ElementName=ZoomSlider}\" />
</local:CoreViewerCanvas.LayoutTransform>
</local:CoreViewerCanvas>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</ScrollViewer>
private void objCoreViewer_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
}
private void OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var mousePos = e.GetPosition(objScrollViewer);
if (mousePos.X <= objScrollViewer.ViewportWidth && mousePos.Y <
objScrollViewer.ViewportHeight)
{
objScrollViewer.Cursor = Cursors.SizeAll;
lastDragPoint = mousePos;
Mouse.Capture(objScrollViewer);
}
}
没有找到相关结果
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傻零凰死授
private void OnPreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { var mousePos = e.GetPosition(objScrollViewer); if (mousePos.X <= objScrollViewer.ViewportWidth && mousePos.Y < objScrollViewer.ViewportHeight) { objScrollViewer.Cursor = Cursors.SizeAll; lastDragPoint = mousePos; Mouse.Capture(objScrollViewer); } FrameworkElement ctrl = (e.OriginalSource as FrameworkElement); if (ctrl != null) { switch (ctrl.DataContext.GetType().ToString()) { case \"GE.GNF.ACUMEN.Library.SIMULATOR_BUNDLE_NODAL_DATA\": objCoreViewer.SelectedItem = ctrl.DataContext as SIMULATOR_BUNDLE_NODAL_DATA; break; case \"GE.GNF.ACUMEN.Library.SIMULATOR_CONTROL_BLADE_NODAL_DATA\": objCoreViewer.SelectedItem = ctrl.DataContext as SIMULATOR_CONTROL_BLADE_NODAL_DATA; break; default: break; } } }