我正在努力告诉QScitilla textEdit(它是MainWindow应用程序的主要小部件)接受右键单击鼠标显示个性化上下文菜单。
如果我使用标准的Qt5 textEdit可以正常工作,如果与QScintilla替代方法一起使用会失败。我尝试通过一些操作来定义用户菜单:
void MainWindow::contextMenuEvent(QContextMenuEvent *event)
{
QMenu menu(this);
menu.addAction(cutAct);
menu.addAction(copyAct);
menu.addAction(pasteAct);
menu.exec(event->globalPos());
}
#endif // QT_NO_CONTEXTMENU
对QContextMenuEvent起作用,但是仅当我右键单击MainWindow的元素而不是QScintilla textEdit时,菜单才会显示。当我在textEdit中进行操作时,仅显示标准的剪切/复制/粘贴菜单。
如何为QScintilla textEdit实现该功能?
答案 0 :(得分:1)
有两种方法:
方法1:为QScintilla文本编辑的上下文菜单策略设置class ViewController: UIViewController {
var myView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
myView = UIView(frame: CGRect(x: 0, y: 0, width: 400, height: 200))
myView.center = self.view.center
myView.isUserInteractionEnabled = true
myView.backgroundColor = UIColor.red
self.view.addSubview(myView)
}
func pToA (_ t:UITouch) -> CGFloat {
let loc = t.location(in: myView)
let c = myView.convert(myView.center, from:myView.superview!)
return atan2(loc.y - c.y, loc.x - c.x)
}
var initialAngle = CGFloat(0)
var angle = CGFloat(0)
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.initialAngle = pToA(touches.first!)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
let ang = pToA(touches.first!) - self.initialAngle
let absoluteAngle = self.angle + ang
myView.transform = myView.transform.rotated(by: ang)
self.angle = absoluteAngle
}
}
:
Qt::CustomContextMenu
方法2:定义QScintilla的子类,然后重新定义覆盖函数contextMenuEvent:
textEdit->setContextMenuPolicy( Qt::CustomContextMenu );
connect(textEdit, SIGNAL(customContextMenuRequested(const QPoint &)),
this, SLOT(ShowContextMenu(const QPoint &)));
}
void MainWindow::ShowContextMenu(const QPoint &pos)
{
QMenu contextMenu(tr("Context menu"), this);
QAction action1("Action 1", this);
connect(&action1, &QAction::triggered, this, []{
qDebug() << "On action 1 click !!!";
});
contextMenu.addAction(&action1);
contextMenu.exec(mapToGlobal(pos));
}