GDI+: GdipGetHatchBackgroundColor

[José Roca]

The following example sets up three colors: black, turquoise, and current (initialized to black). A rectangle is painted by using turquoise as the background color and black as the foreground color. Then the GdipGetBackgroundColor function is used to get the current color of the brush (which at the time is turquoise). The address of the current color (initialized to black) is passed as the return point for the call to GdipGetBackgroundColor. When the rectangle is painted again, note that the background color is again turquoise (not black). This shows that the call to GdipGetBackgroundColor was successful.

C++

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VOID Example_GetBackgroundColor(HDC hdc)
{
   Graphics graphics(hdc);

   // Set colors.
   Color black(255, 0, 0, 0);         // foreground
   Color turquoise(255, 0, 255, 255); // background
   Color current(255, 0, 0, 0);       // new background

   // Set and then draw the first hatch style.
   HatchBrush brush(HatchStyleHorizontal, black, turquoise);
   graphics.FillRectangle(&brush, 20, 20, 100, 50);

   // Get the background color of the current brush.
   brush.GetBackgroundColor(&current);

   // Draw the rectangle again using the current color.
   HatchBrush brush2(HatchStyleDiagonalCross, black, current);
   graphics.FillRectangle(&brush2, 130, 20, 100, 50);
}


PowerBASIC

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SUB GDIP_GetHatchBackgroundColor (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pColorBlack AS DWORD
   LOCAL pColorTurquoise AS DWORD
   LOCAL pColorCurrent AS DWORD
   LOCAL pBrush AS DWORD
   LOCAL pBrush2 AS DWORD

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   ' // Set colors.
   pColorBlack = GDIP_ARGB(255, 0, 0, 0)           ' foreground
   pColorTurquoise = GDIP_ARGB(255, 0, 255, 255)   ' background
   pColorCurrent = GDIP_ARGB(255, 0, 0, 0)         ' new background

   ' // Set and then draw the first hatch style.
   hStatus = GdipCreateHatchBrush(%HatchStyleHorizontal, pColorBlack, pColorTurquoise, pBrush)
   hStatus = GdipFillRectangle(pGraphics, pBrush, 20, 20, 100, 50)

   ' // Get the background color of the current brush.
   hStatus = GdipGetHatchBackgroundColor(pBrush, pColorCurrent)

   ' // Draw the rectangle again using the current color.
   hStatus = GdipCreateHatchBrush(%HatchStyleDiagonalCross, pColorBlack, pColorCurrent, pBrush2)
   hStatus = GdipFillRectangle(pGraphics, pBrush2, 130, 20, 100, 50)

   ' // Cleanup
   IF pBrush THEN GdipDeleteBrush(pBrush)
   IF pBrush2 THEN GdipDeleteBrush(pBrush2)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB