描述

 

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C++ Syntax

 

 

 

FreeBASIC 语法

 

 

 

参数

 

rc

 

[out]指向GpRectF或GpRect接收边框结构.

 

返回值

 

如果该方法成功,则返回Ok,这是对Status枚举元素.

如果这个方法失败,它返回一个枚举的其他元素的Status.

 

引用文件

 

CGpBrush.inc (include CGdiPlus.inc)

 

示例

 

' ========================================================================================

' The following example creates a PathGradientBrush object based on a polygon that is defined

' by four points. The code calls the PathGradientBrush::GetRectangle method of the

' PathGradientBrush object to obtain the smallest rectangle that encloses the brush's

' boundary path. The code calls the Graphics.FillRectangle method of a Graphics object,

' passing the address of the PathGradientBrush object and a reference to the brush's bounding

' rectangle. That call fills only the portion of the bounding rectangle that is inside the

' brush's boundary path. Finally the code draws the outline of the bounding rectangle.

' ========================================================================================

SUB Example_GetRectangle (BYVAL hdc AS HDC)

 

  ' // Create a graphics object from the window device context

  DIM graphics AS CGpGraphics = hdc

  ' // Get the DPI scaling ratio

  DIM rxRatio AS SINGLE = graphics.GetDpiX / 96

  DIM ryRatio AS SINGLE = graphics.GetDpiY / 96

  ' // Set the scale transform

  graphics.ScaleTransform(rxRatio, ryRatio)

 

  DIM pen AS CGpPen = GDIP_ARGB(255, 0, 0, 0)

 

  ' // Create a path gradient brush based on an array of points.

  DIM points(0 TO 3) AS GpPoint = {GDIP_POINT(30, 20), GDIP_POINT(150, 40), GDIP_POINT(100, 100), GDIP_POINT(60, 200)}

  DIM pthGrBrush AS CGpPathGradientBrush = CGpPathGradientBrush(@points(0), 4)

 

  ' // Obtain information about the path gradient brush.

  DIM rc AS GpRectF

  pthGrBrush.GetRectangle(@rc)

 

  graphics.FillRectangle(@pthGrBrush, @rc)

  graphics.DrawRectangle(@pen, @rc)

 

END SUB

' ========================================================================================