C++ (Cpp) GraphicView::Update示例

void FrameKit::InitViewer () {
    Catalog* catalog = unidraw->GetCatalog();

    const char* page_w = catalog->GetAttribute(page_width_attrib);
    const char* page_h = catalog->GetAttribute(page_height_attrib);
    const char* page_cols = catalog->GetAttribute(page_cols_attrib);
    const char* page_rows = catalog->GetAttribute(page_rows_attrib);
    const char* x_incr = catalog->GetAttribute(grid_x_incr);
    const char* y_incr = catalog->GetAttribute(grid_y_incr);

    GraphicView* view = (GraphicView*)((FrameEditor*)_ed)->_comp->Create(COMPONENT_VIEW);
    ((FrameEditor*)_ed)->_comp->Attach(view);
    view->Update();

    Style* style = Session::instance()->style();
    boolean bookgeom = style->value_is_on("bookgeom");

    float w = bookgeom ? 700 : Math::round(atof(page_w) * ivinches);
    float h = bookgeom ? 906 : Math::round(atof(page_h) * ivinches);
    if (page_cols && page_rows) {
      int ncols = atoi(page_cols);
      int nrows = atoi(page_rows);
      if (ncols>0 && nrows>0) {
	w = ncols;
	h = nrows;
      }
    }

    OverlayPage* page = new OverlayPage(w, h);
    Grid* grid = new Grid(w, h, atof(x_incr), atof(y_incr));
    grid->Visibility(false);

    if (!bookgeom)
	((FrameEditor*)_ed)->_viewer = new FrameViewer(_ed, view, page, grid);
    else 
	((FrameEditor*)_ed)->_viewer = new FrameViewer(_ed, view, page, grid, (int) h+1, (int) w+1, Rotated);
}