标签:c rotation position wpf xaml
我需要更改元素的父级. (对于组/ ungroup形状)
但是如果一个元素有一个旋转,我就不能设置它的新位置.
我看过this,this,this和this页以及其他许多方法,但都没有正常工作.
请参阅my sample project和以下图片:
Rect1的父级是ChildCanvas1,Rect2的父级是ChildCanvas2,我想将Rect1和Rect2移动到MainCanvas. (并删除ChildCanvas和ChildCanvas2)
我对Rect1没有任何问题,因为它没有任何旋转.
但是Rect2有一个旋转(-20度),我无法正确设置它的新坐标.
请看这个图像:
如何在旋转后更改元素的父级并正确设置新坐标?
更新:
注意我需要一种通用的方法(对于大应用程序中的group / ungroup元素,每个元素(可能)都有TranslateTransform和SkewTransform以及RotateTransform和ScaleTransform)
XAML:
<Canvas x:Name="MainCanvas">
<Canvas x:Name="ChildCanvas1" Width="500" Height="250" Background="Bisque" Canvas.Top="54">
<Rectangle x:Name="Rect1" Width="200" Height="100" Fill="Red" Canvas.Left="150" Canvas.Top="100"/>
</Canvas>
<Canvas Name="ChildCanvas2" Width="500" Height="250" Background="Bisque" Canvas.Left="516" Canvas.Top="54">
<Rectangle Name="Rect2" Width="200" Height="100" Fill="Red" Canvas.Left="150" Canvas.Top="100">
<Rectangle.RenderTransform>
<TransformGroup>
<SkewTransform AngleX="-40"/>
<RotateTransform Angle="-20"/>
</TransformGroup>
</Rectangle.RenderTransform>
</Rectangle>
</Canvas>
<Button Name="btn1" Click="btn1_Click" Content="Move Rect1 to MainCanvas and Remove ChildCanvas1" Width="356" Height="30" Canvas.Left="59" Canvas.Top="310"/>
<Button Name="btn2" Click="btn2_Click" Content="Move Rect2 to MainCanvas and Remove ChildCanvas2" Width="350" Height="30" Canvas.Left="590" Canvas.Top="310"/>
C#代码:
GeneralTransform transform = Rect2.TransformToVisual(MainCanvas);
Rect rect = transform.TransformBounds(new Rect(0, 0, Rect2.Width, Rect2.Height));
double ChildCanvas2Left = Canvas.GetLeft(ChildCanvas2);
double ChildCanvas2Top = Canvas.GetLeft(ChildCanvas2);
ChildCanvas2.Children.Remove(Rect2);
MainCanvas.Children.Add(Rect2);
Canvas.SetLeft(Rect2, rect.Left);
Canvas.SetTop(Rect2, rect.Top);
MainCanvas.Children.Remove(ChildCanvas2);
解决方法:
将Rect2移动到MainCanvas后,需要重新计算Rect2.像这样:
Canvas.SetTop(Rect2, Canvas.GetTop(Rect2) + Canvas.GetTop(ChildCanvas2));
完整的代码:
private void btn2_Click(object sender, RoutedEventArgs e)
{
GeneralTransform transform = Rect2.TransformToVisual(MainCanvas);
Rect rect = transform.TransformBounds(new Rect(0, 0, Rect2.Width, Rect2.Height));
ChildCanvas2.Children.Remove(Rect2);
MainCanvas.Children.Remove(ChildCanvas2);
Canvas.SetLeft(Rect2, rect.Left);
Canvas.SetTop(Rect2, Canvas.GetTop(Rect2) + Canvas.GetTop(ChildCanvas2));
MainCanvas.Children.Add(Rect2);
}
但是在您的情况下不需要Rect2.TransformToVisual和transform.TransformBounds,如果没有它们,您可以更清洁,更轻松地获得相同的结果.像这样:
ChildCanvas2.Children.Remove(Rect2);
MainCanvas.Children.Remove(ChildCanvas2);
Canvas.SetLeft(Rect2, Canvas.GetLeft(Rect2) + Canvas.GetLeft(ChildCanvas2));
Canvas.SetTop(Rect2, Canvas.GetTop(Rect2) + Canvas.GetTop(ChildCanvas2));
MainCanvas.Children.Add(Rect2);
编辑:一般方式:
ChildCanvas2.Children.Remove(Rect2);
MainCanvas.Children.Remove(ChildCanvas2);
Canvas.SetLeft(Rect2, Canvas.GetLeft(Rect2) + Canvas.GetLeft(ChildCanvas2));
Canvas.SetTop(Rect2, Canvas.GetTop(Rect2) + Canvas.GetTop(ChildCanvas2));
Canvas.SetRight(Rect2, Canvas.GetRight(Rect2) + Canvas.GetRight(ChildCanvas2));
Canvas.SetBottom(Rect2, Canvas.GetBottom(Rect2) + Canvas.GetBottom(ChildCanvas2));
MainCanvas.Children.Add(Rect2);
标签:c,rotation,position,wpf,xaml 来源: https://codeday.me/bug/20190527/1166434.html
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