ScaleTransform in WPF

Scaling is a process of stretching or shrinking an element. The ScaleTransform scales an element by a given factor.

The ScaleTransform object in WPF represents ScaleTransform. The ScaleX and ScaleY properties represent the factor related to x and y coordinates respectively. The CenterX and CenterY properties represent the X and Y coordinates of the center point. By default, a ScaleTransform is centered at the point (0,0), which corresponds to the upper-left corner of the rectangle.

The code listed in Listing creates two rectangles with same position and size accepts the second rectangle is scaled to 1.5 and 2.0 toward the x and y axis respectively. Scaling value 1.5 represents 150% increase and 2.0 represents 200% increase.

<Rectangle.RenderTransform>

</Rectangle.RenderTransform>

</Rectangle>

The output of Listing looks like Figure 1.

Figure 1

The code listed in Listing creates a RotateTransform object dynamically and set it as RenderTransform property of a Rectangle. The output looks like Figure .

private void ScaleTransformSample()

{

Rectangle originalRectangle = new Rectangle();

originalRectangle.Width = 200;

originalRectangle.Height = 50;

originalRectangle.Fill = Brushes.Yellow;

LayoutRoot.Children.Add(originalRectangle);

Rectangle scaledRectangle = new Rectangle();

scaledRectangle.Width = 200;

scaledRectangle.Height = 50;

scaledRectangle.Fill = Brushes.Blue;

scaledRectangle.Opacity = 0.5;

ScaleTransform scaleTransform1 = new ScaleTransform(1.5, 2.0, 50, 50);

scaledRectangle.RenderTransform = scaleTransform1;

LayoutRoot.Children.Add(scaledRectangle);

}