hi all!
i have the following code in my application which creates a rectangle and adds it to my canvas:
rect =newRectangle();
rect.Stroke =newSolidColorBrush(Colors.Red);
canvas.Children.Add(rect);
rect.Width = 50;
rect.Height = 50;
Canvas.SetLeft(rect, 10);
Canvas.SetTop(rect, 10);
what property do i have to set so that when the canvas is resized, the rectangle adjusts its size and position accordingly?
I don' know exactly which functionality you are looking for, but, if I were you, I would put the Canvas in a Viewbox, then you get the size and position updates for free. Or are you trying to obtain another result?
Best regards,
Benny
for example centered sizing rectangle:
rect.Margin.right = rect.Margin.left = new Thickness(canvas.Width / 2 - 25,
canvas.Height / 2 - 25,
canvas.Width / 2 - 25,
canvas.Height / 2 - 25 );
As we known, Canvas layout its children control by absolute position. so you can binding width property of Rectangle to Canvas's ActucalWidth.
Don't put the Rectangle in a Canvas. Put it in a Grid cell or even just set it to the content of a Page or Window. Don't set the Width and Height. By default, the Rectangle will automatically fill its parent because the HorizontalAlignment and VerticalAlignment properties have default values of Stretch. (See Chapter 3 of my book "Applications = Code + Markup" and later chapters for details.)
