我正在尝试使用 wpf 移动控制Canvas
这是XAML
<Canvas Grid.Column="1" Grid.Row="0" x:Name="DropCanvas" AllowDrop="True" DragOver="DropCanvas_DragOver"
Drop="Canvas_Drop" DragEnter="Canvas_DragEnter" Background="#12000000" >
<TextBox Canvas.Left="162" Canvas.Top="188" Height="23" Name="textBox1" Width="120"
PreviewMouseMove="textBox1_PreviewMouseMove"
PreviewMouseLeftButtonDown="textBox1_PreviewMouseLeftButtonDown"
PreviewMouseUp="textBox1_PreviewMouseUp" />
</Canvas>
这是代码
Point p = new Point();
private void textBox1_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Control control = sender as Control;
control.CaptureMouse();
p = e.GetPosition(control);
}
private void textBox1_PreviewMouseMove(object sender, MouseEventArgs e)
{
Control control = sender as Control;
Point x = e.GetPosition(control);
if (e.LeftButton == MouseButtonState.Pressed)
{
Canvas.SetLeft(control, Canvas.GetLeft(control) + (x.X - p.X));
Canvas.SetTop(control, Canvas.GetTop(control) + (x.Y - p.Y));
}
p = x;
}
private void textBox1_PreviewMouseUp(object sender, MouseButtonEventArgs e)
{
Control control = sender as Control;
control.ReleaseMouseCapture();
activated = false;
}
代码正在运行,但是当它移动时,控件会抖动。
问题是什么