【发布时间】:2015-07-03 15:58:57
【问题描述】:
我是 C# 新手。我想防止通过操作事件抛出 XAML 的对象。我的应用是在 Windows Phone 8.1 RT 中开发的。
我有 XAML 的矩形:
<Canvas x:Name="MyCanvas" Background="White">
<Rectangle Name="TestRectangle"
Width="100" Height="200" Fill="Blue"
ManipulationMode="All"/>
</Canvas>
在主页中:
public MainPage()
{
this.InitializeComponent();
// Handle manipulation events.
TestRectangle.ManipulationDelta += Drag_ManipulationDelta;
dragTranslation = new TranslateTransform();
TestRectangle.RenderTransform = this.dragTranslation;
this.NavigationCacheMode = NavigationCacheMode.Required;
}
void Drag_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
// Move the rectangle.
dragTranslation.X += e.Delta.Translation.X;
dragTranslation.Y += e.Delta.Translation.Y;
}
private void TestRectangle_PointerPressed(object sender,
PointerRoutedEventArgs e)
{
Rectangle rect = sender as Rectangle;
// Change the size of the Rectangle
if (null != rect)
{
rect.Width = 250;
rect.Height = 150;
}
}
private void TestRectangle_PointerReleased(object sender,
PointerRoutedEventArgs e)
{
Rectangle rect = sender as Rectangle;
// Reset the dimensions on the Rectangle
if (null != rect)
{
rect.Width = 200;
rect.Height = 100;
}
}
private void TestRectangle_PointerExited(object sender,
PointerRoutedEventArgs e)
{
Rectangle rect = sender as Rectangle;
// Finger moved out of Rectangle before the pointer exited event
// Reset the dimensions on the Rectangle
if (null != rect)
{
rect.Width = 200;
rect.Height = 100;
}
}
当用户退出事件时如何移动对象而不抛出?
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