C++ (Cpp) QGraphicsView::horizontalScrollBar示例

QRectF PageClientQGraphicsWidget::graphicsItemVisibleRect() const
{
    if (!view->scene())
        return QRectF();

    QList<QGraphicsView*> views = view->scene()->views();
    if (views.isEmpty())
        return QRectF();

    QGraphicsView* graphicsView = views.at(0);
    int xOffset = graphicsView->horizontalScrollBar()->value();
    int yOffset = graphicsView->verticalScrollBar()->value();
    return view->mapRectFromScene(QRectF(QPointF(xOffset, yOffset), graphicsView->viewport()->size()));
}

示例#2

显示文件

文件： qgraphicswkview.cpp 项目： achellies/WinCEWebKit

QRectF QGraphicsWKView::visibleRect() const
{
    if (!scene())
        return QRectF();

    QList<QGraphicsView*> views = scene()->views();
    if (views.isEmpty())
        return QRectF();

    QGraphicsView* graphicsView = views.at(0);
    int xOffset = graphicsView->horizontalScrollBar()->value();
    int yOffset = graphicsView->verticalScrollBar()->value();
    return mapRectFromScene(QRectF(QPointF(xOffset, yOffset), graphicsView->viewport()->size()));
}