Graphics.IntersectClip Method (RectangleF)
Updates the clip region of this Graphics to the intersection of the current clip region and the specified RectangleF structure.
Assembly: System.Drawing (in System.Drawing.dll)
Parameters
- rect
-
Type:
System.Drawing.RectangleF
RectangleF structure to intersect with the current clip region.
The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:
Creates a rectangle with upper-left corner at (0, 0) and sets the clipping region to this rectangle.
Creates a second rectangle with upper-left corner at (100, 100) and sets the clipping region to the intersection of this rectangle and the current clipping region (the first rectangle).
Fills a large rectangle that includes both previous rectangles with a solid blue brush.
Resets the clipping region to infinite.
Draws rectangles around the two clipping regions. It uses a black pen for the first clipping rectangle and a red pen for the second clipping region.
The result is that only the intersection of the two rectangles is filled with blue.
private void IntersectClipRectangleF1(PaintEventArgs e) { // Set clipping region. Rectangle clipRect = new Rectangle(0, 0, 200, 200); e.Graphics.SetClip(clipRect); // Update clipping region to intersection of // existing region with specified rectangle. RectangleF intersectRectF = new RectangleF(100.0F, 100.0F, 200.0F, 200.0F); e.Graphics.IntersectClip(intersectRectF); // Fill rectangle to demonstrate effective clipping region. e.Graphics.FillRectangle(new SolidBrush(Color.Blue), 0, 0, 500, 500); // Reset clipping region to infinite. e.Graphics.ResetClip(); // Draw clipRect and intersectRect to screen. e.Graphics.DrawRectangle(new Pen(Color.Black), clipRect); e.Graphics.DrawRectangle(new Pen(Color.Red), Rectangle.Round(intersectRectF)); }
Available since 1.1