我正在尝试在 QPixmap 中绘制 QTreeview 的内容,以便在另一个 QWidget 中呈现它并打印它。
目前我的代码如下所示:
QPixmap PrintWidget::getTreeView(QTreeView* treeview){
QAbstractItemView::ScrollMode scrollMode = treeview->verticalScrollMode();
treeview->selectionModel()->setCurrentIndex(QModelIndex(),QItemSelectionModel::Clear);
treeview->setVerticalScrollMode(QTreeView::ScrollPerPixel);
int width = treeview->viewport()->size().width();
int scrollMax = treeview->verticalScrollBar()->maximum();
int height = treeview->maximumViewportSize().height() + scrollMax;
int currentPosition = treeview->verticalScrollBar()->sliderPosition();
treeview->verticalScrollBar()->setSliderPosition(0);
QPixmap pixmap(width,height);
QRegion region(0,0,width,height);
QPainter painter(&pixmap);
treeview->viewport()->render(&painter,QPoint(),region,
RenderFlags(QWidget::DrawChildren|QWidget::IgnoreMask));
treeview->verticalScrollBar()->setSliderPosition(currentPosition);
treeview->setVerticalScrollMode(scrollMode);
return pixmap;
}
如果用户已经看到了 QTreeview,这将非常有效。树视图出现在主窗口的一个选项卡中。如果用户看到树视图然后单击执行我上面的代码的按钮,那么所有树视图都会出现在 QPixmap 中。否则只会出现一点树视图。
有谁知道如何解决这个问题?
谢谢