PathGradientBrush.RotateTransform Method

Definition

Namespace:

System.Drawing.Drawing2D

Assembly:

System.Drawing.Common.dll

Applies a clockwise rotation of the specified angle to the local geometric transform.

Overloads

RotateTransform(Single)	Rotates the local geometric transform by the specified amount. This method prepends the rotation to the transform.
RotateTransform(Single, MatrixOrder)	Rotates the local geometric transform by the specified amount in the specified order.

RotateTransform(Single)

Source:

PathGradientBrush.cs

Rotates the local geometric transform by the specified amount. This method prepends the rotation to the transform.

C#

public void RotateTransform(float angle);

Parameters

angle

Single

The angle (extent) of rotation.

Examples

For an example, see RotateTransform.

RotateTransform(Single, MatrixOrder)

Source:

PathGradientBrush.cs

Rotates the local geometric transform by the specified amount in the specified order.

C#

public void RotateTransform(float angle, System.Drawing.Drawing2D.MatrixOrder order);

Parameters

angle

Single

The angle (extent) of rotation.

order

MatrixOrder

A MatrixOrder that specifies whether to append or prepend the rotation matrix.

Examples

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, an OnPaint event object. The code performs the following actions:

• Creates a graphics path and adds a rectangle to it.

• Creates a PathGradientBrush from the path points (in this example, the points form a rectangle, but it could be most any shape).

• Sets the center color to red and the surrounding color to blue.

• Draws the PathGradientBrush to the screen prior to applying the rotate transform.

• Applies the rotate transform to the brush by using its RotateTransform method.

• Draws the rotated brush (rectangle) to the screen.

Notice that the bottom rectangle is rotated 45 degrees as compared to the one drawn prior to the translation.

C#

public void RotateTransformExample(PaintEventArgs e)
{
             
    // Create a graphics path and add an ellipse.
    GraphicsPath myPath = new GraphicsPath();
    Rectangle rect = new Rectangle(100, 20, 100, 50);
    myPath.AddRectangle(rect);
             
    // Get the path's array of points.
    PointF[] myPathPointArray = myPath.PathPoints;
             
    // Create a path gradient brush.
    PathGradientBrush myPGBrush = new
        PathGradientBrush(myPathPointArray);
             
    // Set the color span.
    myPGBrush.CenterColor = Color.Red;
    Color[] mySurroundColor = {Color.Blue};
    myPGBrush.SurroundColors = mySurroundColor;
             
    // Draw the brush to the screen prior to transformation.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 200);
             
    // Apply the rotate transform to the brush.
    myPGBrush.RotateTransform(45, MatrixOrder.Append);
             
    // Draw the brush to the screen again after applying the
    // transform.
    e.Graphics.FillRectangle(myPGBrush, 10, 10, 200, 300);
}