GDI+: GdipGetRegionBounds

[José Roca]

The following example creates a region from a path, gets the region's enclosing rectangle, and then displays both.

C++

Code Select Expand


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

   Point points[] = {
      Point(110, 20),
      Point(120, 30),
      Point(100, 60),
      Point(120, 70),
      Point(150, 60),
      Point(140, 10)};

   GraphicsPath path;
    SolidBrush solidBrush(Color(255, 255, 0, 0));
    Pen pen(Color(255, 0, 0, 0));
    Rect rect;

   path.AddClosedCurve(points, 6);

    // Create a region from a path.
    Region pathRegion(&path);   
   
    // Get the region's enclosing rectangle.
    pathRegion.GetBounds(&rect, &graphics);

    // Show the region and the enclosing rectangle.
    graphics.FillRegion(&solidBrush, &pathRegion);
    graphics.DrawRectangle(&pen, rect);
}


PowerBASIC

Code Select Expand


SUB GDIP_GetRegionBounds (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pPath AS DWORD
   LOCAL pSolidBrush AS DWORD
   LOCAl pPen AS DWORD
   LOCAL pPathRegion AS DWORD
   LOCAL rc AS RECTF
   DIM   pts(5) AS POINTL

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   pts(0).x = 110 : pts(0).y = 20
   pts(1).x = 120 : pts(1).y = 30
   pts(2).x = 100 : pts(2).y = 60
   pts(3).x = 120 : pts(3).y = 70
   pts(4).x = 150 : pts(4).y = 60
   pts(5).x = 140 : pts(5).y = 10

   hStatus = GdipCreatePath(%FillModeAlternate, pPath)
   hStatus = GdipCreateSolidFill(GDIP_ARGB(255, 255, 0, 0), pSolidBrush)
   hStatus = GdipCreatePen1(GDIP_ARGB(255, 0, 0, 0), 1.0, %UnitWorld, pPen)

   hStatus = GdipAddPathClosedCurveI(pPath, pts(0), 6)

   ' // Create a region from a path.
   hStatus = GdipCreateRegionPath(pPath, pPathRegion)

   ' // Get the region's enclosing rectangle.
   hStatus = GdipGetRegionBounds(pPathRegion, pGraphics, rc)

   ' // Show the region and the enclosing rectangle.
   hStatus = GdipFillRegion(pGraphics, pSolidBrush, pPathRegion)
   hStatus = GdipDrawRectangle(pGraphics, pPen, rc.x, rc.y, rc.Width, rc.Height)

   ' // Cleanup
   IF pPen THEN GdipDeletePen(pPen)
   IF pPathRegion THEN GdipDeleteRegion(pPathRegion)
   IF pSolidBrush THEN GdipDeleteBrush(pSolidBrush)
   IF pPath THEN GdipDeletePath(pPath)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB


The following illustration shows the output of the preceding code.

[José Roca]

The following example creates a region from a path, gets the region's enclosing rectangle, and then displays both.

C++

Code Select Expand


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

   Point points[] = {
      Point(110, 20),
      Point(120, 30),
      Point(100, 60),
      Point(120, 70),
      Point(150, 60),
      Point(140, 10)};

   GraphicsPath path;
    SolidBrush solidBrush(Color(255, 255, 0, 0));
    Pen pen(Color(255, 0, 0, 0));
    Rect rect;

   path.AddClosedCurve(points, 6);

    // Create a region from a path.
    Region pathRegion(&path);   
   
    // Get the region's enclosing rectangle.
    pathRegion.GetBounds(&rect, &graphics);

    // Show the region and the enclosing rectangle.
    graphics.FillRegion(&solidBrush, &pathRegion);
    graphics.DrawRectangle(&pen, rect);
}


PowerBASIC

Code Select Expand


SUB GDIP_GetRegionBoundsI (BYVAL hdc AS DWORD)

   LOCAL hStatus AS LONG
   LOCAL pGraphics AS DWORD
   LOCAL pPath AS DWORD
   LOCAL pSolidBrush AS DWORD
   LOCAl pPen AS DWORD
   LOCAL pPathRegion AS DWORD
   LOCAL rc AS RECTL
   DIM   pts(5) AS POINTL

   hStatus = GdipCreateFromHDC(hdc, pGraphics)

   pts(0).x = 110 : pts(0).y = 20
   pts(1).x = 120 : pts(1).y = 30
   pts(2).x = 100 : pts(2).y = 60
   pts(3).x = 120 : pts(3).y = 70
   pts(4).x = 150 : pts(4).y = 60
   pts(5).x = 140 : pts(5).y = 10

   hStatus = GdipCreatePath(%FillModeAlternate, pPath)
   hStatus = GdipCreateSolidFill(GDIP_ARGB(255, 255, 0, 0), pSolidBrush)
   hStatus = GdipCreatePen1(GDIP_ARGB(255, 0, 0, 0), 1.0, %UnitWorld, pPen)

   hStatus = GdipAddPathClosedCurveI(pPath, pts(0), 6)

   ' // Create a region from a path.
   hStatus = GdipCreateRegionPath(pPath, pPathRegion)

   ' // Get the region's enclosing rectangle.
   hStatus = GdipGetRegionBoundsI(pPathRegion, pGraphics, rc)

   ' // Show the region and the enclosing rectangle.
   hStatus = GdipFillRegion(pGraphics, pSolidBrush, pPathRegion)
   hStatus = GdipDrawRectangleI(pGraphics, pPen, rc.nLeft, rc.nTop, rc.nRight, rc.nBottom)

   ' // Cleanup
   IF pPen THEN GdipDeletePen(pPen)
   IF pPathRegion THEN GdipDeleteRegion(pPathRegion)
   IF pSolidBrush THEN GdipDeleteBrush(pSolidBrush)
   IF pPath THEN GdipDeletePath(pPath)
   IF pGraphics THEN GdipDeleteGraphics(pGraphics)

END SUB


The following illustration shows the output of the preceding code.