[英]How to place QSizeGrip in the bottom right of a QDial?
在GraphicsView(QGraphicsView)上設置場景(QGraphicsScene)時,我正在通過qgraphicsproxy小部件添加qdial對象,將sizegrip放在右下位置? `
QDial *dial = new QDial(); // dial object
plot->setGeometry(event->pos().x(),event->pos().y(),80,80);
QSizeGrip * sizeGrip = new QSizeGrip(dial );// placing sizegrip
QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget();
proxy->setWidget(dial );
proxy->setFlag(QGraphicsItem::ItemIsMovable,true);
scene->addItem(proxy);`
輸出圖像
您必須使用如下所示的布局:
#include <QApplication>
#include <QDial>
#include <QGraphicsProxyWidget>
#include <QGraphicsView>
#include <QHBoxLayout>
#include <QSizeGrip>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QGraphicsView view;
QGraphicsScene *scene = new QGraphicsScene(&view);
view.setScene(scene);
QDial *dial = new QDial;
QSizeGrip * sizeGrip = new QSizeGrip(dial);
QHBoxLayout *layout = new QHBoxLayout(dial);
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(sizeGrip, 0, Qt::AlignRight | Qt::AlignBottom);
QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget();
proxy->setWidget(dial);
proxy->setFlag(QGraphicsItem::ItemIsMovable,true);
scene->addItem(proxy);
view.show();
return a.exec();
}
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