CGpGraphics.IsVisiblemethod

Determines whether the specified point is inside the visible clipping region of this **Graphics** object.

GraphicsmethodCGpGraphics.incdocumented

Syntax

FUNCTION IsVisible (BYVAL pt AS GpPointF PTR) AS BOOLEAN

FUNCTION IsVisible (BYVAL pt AS GpPoint PTR) AS BOOLEAN

FUNCTION IsVisible (BYVAL x AS SINGLE, BYVAL y AS SINGLE) AS BOOLEAN

FUNCTION IsVisible (BYVAL x AS INT_, BYVAL y AS INT_) AS BOOLEAN

FUNCTION IsVisible (BYVAL rc AS GpRectF PTR) AS BOOLEAN

FUNCTION IsVisible (BYVAL rc AS GpRect PTR) AS BOOLEAN

FUNCTION IsVisible (BYVAL x AS SINGLE, BYVAL y AS SINGLE, BYVAL nWidth AS SINGLE, BYVAL nHeight AS SINGLE) AS BOOLEAN

FUNCTION IsVisible (BYVAL x AS INT_, BYVAL y AS INT_, BYVAL nWidth AS INT_, BYVAL nHeight AS INT_) AS BOOLEAN

Parameters

Name		Description
`pt`		Reference to a point to be tested to see whether it is inside the visible clipping region.
`x, y`		Reference to a point to be tested to see whether it is inside the visible clipping region.
`rc`		Reference to a rectangle to be tested to see whether it intersects the visible clipping region.
`x, y, nWidth, nHeight`		Reference to a rectangle to be tested to see whether it intersects the visible clipping region.

Return value

If the specified point is inside the visible clipping region, this method returns TRUE; otherwise, it returns FALSE.

Description

Determines whether the specified point is inside the visible clipping region of this Graphics object. The visible clipping region is the intersection of the clipping region of this Graphics object and the clipping region of the window.

Example

' ======================================================================================== ' The following example determines whether the clipping region is empty and, if it isn't, ' draws a rectangle. ' ======================================================================================== SUB Example_IsVisible (BYVAL hdc AS HDC)

' // Create a graphics object from the window device context DIM graphics AS CGpGraphics = hdc ' // Set the scale transform graphics.ScaleTransformForDpi

' // Determine whether the point is visible and, if it is, draw an ellipse. IF graphics.IsVisible(100, 100) THEN

graphics.FillEllipse(@CGpSolidBrush(ARGB_BLACK), 100, 100, 5, 5)

END IF

END SUB ' ========================================================================================

Reference

Include file CGpGraphics.inc
Defined in AfxNova/CGpGraphics.inc:1461
Documented in Graphics/GdiPlus Classes/CGpGraphics Classes.md
Topic: CGpGraphics Class