GraphicsPath.IsVisible Method (Int32, Int32, Graphics)

 

Indicates whether the specified point is contained within this GraphicsPath, using the specified Graphics.

Namespace:   System.Drawing.Drawing2D
Assembly:  System.Drawing (in System.Drawing.dll)

public bool IsVisible(
	int x,
	int y,
	Graphics graphics
)

Parameters

x
Type: System.Int32

The x-coordinate of the point to test.

y
Type: System.Int32

The y-coordinate of the point to test.

graphics
Type: System.Drawing.Graphics

The Graphics for which to test visibility.

Return Value

Type: System.Boolean

This method returns true if the specified point is contained within this GraphicsPath; otherwise, false.

The coordinates of the point to be tested are given in world coordinates. The transform matrix of graphics is temporarily applied before testing for visibility.

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

  • Creates a path and adds an ellipse to the path.

  • Tests whether the specified point is contained within the path.

  • Displays the result in a dialog box.

private void IsVisibleExample(PaintEventArgs e)
{

    // Create a path and add an ellipse.
    GraphicsPath myPath = new GraphicsPath();
    myPath.AddEllipse(0, 0, 100, 100);

    // Test the visibility of point (50, 50).
    bool visible = myPath.IsVisible(50, 50, e.Graphics);

    // Show the result.
    MessageBox.Show(visible.ToString());
}

.NET Framework
Available since 1.1
Return to top
Show: