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Objetos geometry de OM XPS

  • Artículo

En este tema se proporciona un ejemplo del uso de las interfaces relacionadas con la geometría en un OM XPS.

Creación de una geometría rectangular

En el ejemplo de código siguiente se crea un objeto geometry que describe una forma rectangular cerrada.

    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);

Para obtener más información sobre cómo agregar segmentos a una figura de geometría, vea los ejemplos de código en los temas de referencia del método IXpsOMGeometryFigure::GetSegmentData yIXpsOMGeometryFigure::SetSegments (Método).

IXpsOMGeometry (interfaz)

IXpsOMGeometryFigure (Interfaz)

IXpsOMGeometryFigure::GetSegmentData (Método)

IXpsOMGeometryFigure::SetSegments (Método)

IXpsOMGeometryFigureCollection (Interfaz)