确定 UIElement 在 Canvas 上的位置
我花了 20 分钟尝试在 C# 中找到如何在两个矩形之间绘制一条线的示例，但我找不到任何内容。 我不知道我是否只是不理解在 Silverlight 中绘制 2D 形状的范式，或者我是否只是找错了地方。
我已经设置了矩形，以便可以拖动它们，现在我想在画布上拖动矩形时在两个形状之间画一条线。 我希望能够在拖动第二个矩形时执行类似的操作：
void host1_MouseLeftButtonMove(object sender, MouseEventArgs e)
{
if (isDown)
{
this.host1TranslateTransform.X = e.GetPosition(canvas).X - x;
this.host1TranslateTransform.Y = e.GetPosition(canvas).Y - y;
Line l = new Line();
l.X1 = rect1.X; // does not work
l.X2 = e.GetPosition(canvas).X;
l.Y1 = rect1.Y; // does not work
l.Y2 = e.GetPosition(canvas).Y;
}
}
如何获取第一个框的坐标？ 我不知道如何在应用程序中获取形状相对于画布的坐标。 如果有任何教程能够让初学者了解如何绘制简单的 2D 形状，我将不胜感激。
谢谢！
I have spent 20 minutes trying to find an example in C# of how to draw a line between two rectangles, and I can't find anything. I don't know if I just don't understand the paradigm of drawing 2D shapes in Silverlight, or if I'm just looking in the wrong place.
I have set up the rectangles so I can drag them around, and now I want to draw a line between the two shapes as I drag a rectangle across the canvas. I want to be able to do something like this as I drag the second rectangle:
void host1_MouseLeftButtonMove(object sender, MouseEventArgs e)
{
if (isDown)
{
this.host1TranslateTransform.X = e.GetPosition(canvas).X - x;
this.host1TranslateTransform.Y = e.GetPosition(canvas).Y - y;
Line l = new Line();
l.X1 = rect1.X; // does not work
l.X2 = e.GetPosition(canvas).X;
l.Y1 = rect1.Y; // does not work
l.Y2 = e.GetPosition(canvas).Y;
}
}
How do I get the coordinates of the first box? I can't figure out how to get the coordinates of shapes relative to the canvas in my application. I would appreciate any tutorials that give a beginner overview for how to draw simple 2D shapes.
Thanks!
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尝试这个
位置属性是附加属性;)
try this
position properties are attached properties ;)