The following example creates a
GraphicsPath object and adds three subpaths (figures) to the path. The code creates a graphics path iterator and calls its
GdipPathIterGetSubpathCount function to determine the number of subpaths in the path. Then the code displays the count.
C++
#define BUFFER_SIZE 30
TCHAR numSubpaths[BUFFER_SIZE];
Point pts[] = {Point(20, 20),
Point(40, 20),
Point(40, 40)};
GraphicsPath path;
path.AddLines(pts, 3);
path.StartFigure();
path.AddLine(20, 20, 100, 100);
path.StartFigure();
Rect rect(20, 20, 100, 50);
path.AddRectangle(rect);
// Create a GraphicsPathIterator object, and get the number of subpaths.
GraphicsPathIterator pathIterator(&path);
INT subpathCount = pathIterator.GetSubpathCount();
// Confirm that the subpaths were counted correctly.
StringCchPrintf(
numSubpaths, BUFFER_SIZE, TEXT("There are %d subpaths."), subpathCount);
MessageBox(hWnd, numSubpaths, TEXT("SubpathCount"), NULL);
SUB GDIP_PathIterGetSubpathCount (BYVAL hdc AS DWORD)
LOCAL hStatus AS LONG
LOCAL pGraphics AS DWORD
LOCAL pPath AS DWORD
LOCAL pIterator AS DWORD
LOCAL count AS LONG
DIM pts(3) AS POINTF
hStatus = GdipCreateFromHDC(hdc, pGraphics)
' // Create a path that has a rectangle and an ellipse.
hStatus = GdipCreatePath(%FillModeAlternate, pPath)
' // Add some lines to a path.
pts(0).x = 20 : pts(0).y = 20
pts(1).x = 40 : pts(1).y = 20
pts(2).x = 40 : pts(2).y = 40
hStatus = GdipAddPathLine2(pPath, pts(0), 3)
hStatus = GdipStartPathFigure(pPath)
hStatus = GdipAddPathLine(pPath, 20, 20, 100, 100)
hStatus = GdipStartPathFigure(pPath)
hStatus = GdipAddPathRectangle(pPath, 20, 20, 100, 100)
' // Create a GraphicsPathIterator object, and get the number of subpaths.
hStatus = GdipCreatePathIter(pIterator, pPath)
hStatus = GdipPathIterGetSubpathCount(pIterator, count)
' // Confirm that the subpaths were counted correctly.
MSGBOX "count =" & STR$(count)
' // Cleanup
IF pIterator THEN GdipDeletePathIter(pIterator)
IF pPath THEN GdipDeletePath(pPath)
IF pGraphics THEN GdipDeleteGraphics(pGraphics)
END SUB