C# 如果处理对象,则阻止鼠标移动触发器
我有一个网格,当鼠标悬停在它上面时,它会使它的一个子元素变得生动(不透明度从0到1),但是这个网格也可以被处理掉(这个网格是列表框的一部分,可以通过网格上的关闭按钮移除) 当用户单击remove按钮时,它还会启动MouseLeave事件,在该事件下,当然无法再找到my DockStackPanel控件,因为它已被释放。如何解决此问题C# 如果处理对象,则阻止鼠标移动触发器,c#,wpf,xaml,animation,mouseleave,C#,Wpf,Xaml,Animation,Mouseleave,我有一个网格,当鼠标悬停在它上面时,它会使它的一个子元素变得生动(不透明度从0到1),但是这个网格也可以被处理掉(这个网格是列表框的一部分,可以通过网格上的关闭按钮移除) 当用户单击remove按钮时,它还会启动MouseLeave事件,在该事件下,当然无法再找到my DockStackPanel控件,因为它已被释放。如何解决此问题 <Grid.Triggers> <EventTrigger RoutedEvent="UIElement.MouseE
<Grid.Triggers>
<EventTrigger RoutedEvent="UIElement.MouseEnter">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0.5" Storyboard.TargetName="DockStackPanel" Storyboard.TargetProperty="Opacity" To="1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<EventTrigger RoutedEvent="UIElement.MouseLeave">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Duration="0:0:0.5" Storyboard.TargetName="DockStackPanel" Storyboard.TargetProperty="Opacity" To="0" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
您是否尝试过用代码创建动画。我在这里假设DockStackPanel控件是StackPanel
public MainWindow()
{
InitializeComponent();
MyGrid.MouseEnter += MyGrid_MouseEnter;
MyGrid.MouseLeave += MyGrid_MouseLeave;
}
void MyGrid_MouseLeave(object sender, MouseEventArgs e)
{
if (DockStackPanel != null)
{
var dur = new Duration(new TimeSpan(0, 0, 0, 0, 500));
var anim = new DoubleAnimation(0, dur);
DockStackPanel.BeginAnimation(StackPanel.OpacityProperty, anim);
}
}
void MyGrid_MouseEnter(object sender, MouseEventArgs e)
{
var dur = new Duration(new TimeSpan(0, 0, 0, 0, 500));
var anim = new DoubleAnimation(1, dur);
DockStackPanel.BeginAnimation(StackPanel.OpacityProperty, anim);
}
您可以做的另一件事是为
Grid
实现DataTrigger
,当DisableTriggers
属性更改时,它将覆盖默认的MouseLeave
和MouseEnter
事件而不执行任何操作
<Style TargetType="{x:Type Grid}">
<Style.Triggers>
<DataTrigger Binding="{Binding DisableTriggers}" Value="True">
<Setter Property="Style" Value="{StaticResource GridStyleWithoutStoryboards}" />
</DataTrigger>
</Style.Triggers>
</Style>
总之,您必须添加带有DisableTriggers
依赖属性的附加行为,该属性在OnChanged
处理程序中执行清理操作
如果您只想取消订阅特定活动:
foreach (var eventToUnsubscribe in grid.Triggers.OfType<EventTrigger>()
.Where(x => x.RoutedEvent == UIElement.MouseEnterEvent
|| x.RoutedEvent == UIElement.MouseLeaveEvent).ToList())
{
grid.Triggers.Remove(eventToUnsubscribe);
};
foreach(var eventToUnsubscribe in grid.Triggers.OfType()中)
.其中(x=>x.RouteEvent==UIElement.MouseEnterEvent
||x.RouteEvent==UIElement.MouseLeaveEvent.ToList())
{
grid.Triggers.Remove(eventToUnsubscribe);
};
您将需要发布更多的代码主管。我希望避免代码落后,但这似乎是最好的解决方案,谢谢!没问题,很乐意帮忙
foreach (var eventToUnsubscribe in grid.Triggers.OfType<EventTrigger>()
.Where(x => x.RoutedEvent == UIElement.MouseEnterEvent
|| x.RoutedEvent == UIElement.MouseLeaveEvent).ToList())
{
grid.Triggers.Remove(eventToUnsubscribe);
};