The following example creates a
GraphicsPath object and adds three lines to the path. The code creates a graphics patyh iterator and calls the
GdipPathIterCopyData function to retrieve the path's points and point types. Then the code displays the count returned by the
GdipPathIterCopyData function.
C++
#define BUFFER_SIZE 30
TCHAR numPointsCopied[BUFFER_SIZE];
// Create the points for three lines in a path.
Point pts[] = { Point(20, 20),
Point(100, 20),
Point(100, 50),
Point(20, 50) };
GraphicsPath path;
path.AddLines(pts, 4); // Add the lines to the path.
// Create a GraphicsPathIterator object and associate it with the path.
GraphicsPathIterator pathIterator(&path);
// Create destination arrays, and copy the path data to them.
PointF* pCopiedPoints = new PointF[4];
BYTE* pTypes = new BYTE[4];
INT count = pathIterator.CopyData(pCopiedPoints, pTypes, 0, 3);
// Confirm that the points copied.
StringCchPrintf(
numPointsCopied, BUFFER_SIZE, TEXT("%d points were copied."), count);
MessageBox(hWnd, numPointsCopied, TEXT("CopyData"), NULL);
delete[] pCopiedPoints;
delete[] pTypes;
SUB GDIP_PathIterCopyData (BYVAL hdc AS DWORD)
LOCAL hStatus AS LONG
LOCAL pGraphics AS DWORD
LOCAL pPath AS DWORD
LOCAL pIterator AS DWORD
LOCAL c AS LONG
LOCAL count AS LONG
DIM pts(3) AS POINTF
DIM pPoints(3) AS POINTF
DIM pTypes(3) AS BYTE
hStatus = GdipCreateFromHDC(hdc, pGraphics)
' // Create a path that has a rectangle and an ellipse.
hStatus = GdipCreatePath(%FillModeAlternate, pPath)
hStatus = GdipAddPathRectangle(pPath, 20, 20, 60, 30)
' // Add some lines to a path.
pts(0).x = 20 : pts(0).y = 20
pts(1).x = 100 : pts(1).y = 20
pts(2).x = 100 : pts(2).y = 50
pts(3).x = 20 : pts(3).y = 50
hStatus = GdipAddPathLine2(pPath, pts(0), 4)
' // Create a GraphicsPathIterator object, and associate it with the path.
hStatus = GdipCreatePathIter(pIterator, pPath)
OutputDebugString("pIterator =" & STR$(pIterator))
' // Copy the path data to the destination arrays.
hStatus = GdipPathIterCopyData(pIterator, count, pPoints(0), pTypes(0), 0, 3)
OutPutDebugString("hStatus =" & STR$(hStatus))
' // Confirm that the points copied.
OutPutDebugString("count =" & STR$(count))
' // Cleanup
IF pIterator THEN GdipDeletePathIter(pIterator)
IF pPath THEN GdipDeletePath(pPath)
IF pGraphics THEN GdipDeleteGraphics(pGraphics)
END SUB