Share via

XPS OM Geometry Objects

  • Article

This topic provides an example of using the geometry-related interfaces in an XPS OM.

Create a rectangular geometry

The following code example creates a geometry object that describes a closed rectangular shape.

    HRESULT                         hr = S_OK;
    IXpsOMVisualCollection          *canvasVisuals = NULL;
    IXpsOMPath                      *pathSidebar = NULL;
    IXpsOMGeometry                  *xpsGeometry = NULL;
    IXpsOMGeometryFigure            *xpsFigure = NULL;
    IXpsOMGeometryFigureCollection  *xpsFigureCollection = NULL;
    IXpsOMSolidColorBrush           *sidebarBrush = NULL;

    XPS_POINT      startPoint;
    XPS_RECT       shape;

    // define the rectangle
    shape.x = 10.0f;
    shape.y = 10.0f;
    shape.height = 100.0f;
    shape.width = 200.0f;

    // set the start point
    startPoint.x = shape.x;
    startPoint.y = shape.y;

    // define the segment types to be straight lines
    XPS_SEGMENT_TYPE sidebarSegmentTypes[3] = {
        XPS_SEGMENT_TYPE_LINE, 
        XPS_SEGMENT_TYPE_LINE, 
        XPS_SEGMENT_TYPE_LINE
    };

    // define the points of the rectangular shape
    // other than the start point
    FLOAT sidebarSegmentData[6] = {
        shape.x,               shape.y + shape.height,
        shape.x + shape.width, shape.y + shape.height,
        shape.x + shape.width, shape.y
    };

    // set the lines to be solid (not stroked)
    BOOL sidebarSegmentStrokes[3] = {
        FALSE, FALSE, FALSE
    };

    // create the geometry figure interface
    hr = xpsFactory->CreateGeometryFigure( &startPoint, &xpsFigure );

    // close the figure so that the last segment point is
    // connected to the start point
    hr = xpsFigure->SetIsClosed( TRUE );

    // set the shape to be filled by the fill brush
    hr = xpsFigure->SetIsFilled( TRUE );

    // set the segments using the information defined above
    hr = xpsFigure->SetSegments(
        3, 
        6, 
        sidebarSegmentTypes,
        sidebarSegmentData, 
        sidebarSegmentStrokes);

    // create a geometry using the figure just created
    hr = xpsFactory->CreateGeometry(&xpsGeometry);

    // get a pointer to the figure collection
    hr = xpsGeometry->GetFigures(&xpsFigureCollection);

    // and add the figure of the rectangle to the geometry
    hr = xpsFigureCollection->Append(xpsFigure);

For more information about adding segments to a geometry figure, see the code examples in the IXpsOMGeometryFigure::GetSegmentData Method and IXpsOMGeometryFigure::SetSegments Method reference topics.

IXpsOMGeometry Interface

IXpsOMGeometryFigure Interface

IXpsOMGeometryFigure::GetSegmentData Method

IXpsOMGeometryFigure::SetSegments Method

IXpsOMGeometryFigureCollection Interface