我有一个Canvas中包含一个Thumb(包含一个TextBlock)和一个Border。
Thumb接收拖放事件,可以正常拖动。
我的需求是,在Thumb拖动时捕获Border的MouseEnter事件。
但问题是,当鼠标按钮释放后,才会触发MouseEnter事件。
那么,如何在鼠标按下时就知道鼠标进入了Border呢?
Xaml代码:
<Grid>
<Canvas Margin="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Canvas Name="dragTarget">
<Thumb
DragStarted="Thumb_DragStarted"
DragDelta="Thumb_DragDelta"
DragCompleted="Thumb_DragCompleted">
<Thumb.Template>
<ControlTemplate>
<TextBlock
Text="Some Text"
Foreground="White"
Background="DimGray"/>
</ControlTemplate>
</Thumb.Template>
</Thumb>
</Canvas>
<Border Width="100" Height="100" Margin="50,50,0,0"
BorderBrush="AliceBlue" BorderThickness="1" Background="Silver"
MouseEnter="Border_MouseEnter"/>
</Canvas>
Xaml.cs:
bool isDragging = false;
double x = 0;
double y = 0;
private void Border_MouseEnter(object sender, MouseEventArgs e)
{
if(isDragging)
Title = "Captured";
}
private void Thumb_DragStarted(object sender, System.Windows.Controls.Primitives.DragStartedEventArgs e)
{
isDragging = true;
x = e.HorizontalOffset;
y = e.VerticalOffset;
}
private void Thumb_DragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)
{
isDragging = false;
}
private void Thumb_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
x += e.HorizontalChange;
y += e.VerticalChange;
dragTarget.Margin = new Thickness(x , y , 0, 0);
}