我需要在我的窗口右键单击时创建一个上下文菜单。但我真的不知道如何实现这一目标。
是否有任何小部件,或者我必须从头开始创建它?
编程语言:Python
图形库:Qt(PyQt)
答案 0 :(得分:40)
我不能说python,但它在C ++中相当容易。
首先在创建窗口小部件后设置策略:w->setContextMenuPolicy(Qt::CustomContextMenu);
然后将上下文菜单事件连接到插槽:
connect(w, SIGNAL(customContextMenuRequested(const QPoint &)), this, SLOT(ctxMenu(const QPoint &)));
最后,您实现了插槽:
void A::ctxMenu(const QPoint &pos) {
QMenu *menu = new QMenu;
menu->addAction(tr("Test Item"), this, SLOT(test_slot()));
menu->exec(w->mapToGlobal(pos));
}
这就是你在c ++中的表现,在python API中不应该有太大的不同。
浏览谷歌后,编辑:,这是我在python中的示例的设置部分:
self.w = QWhatever();
self.w.setContextMenuPolicy(Qt.CustomContextMenu)
self.connect(self.w,SIGNAL('customContextMenuRequested(QPoint)'), self.ctxMenu)
答案 1 :(得分:14)
另一个示例显示如何在工具栏和上下文菜单中使用操作。
class Foo( QtGui.QWidget ):
def __init__(self):
QtGui.QWidget.__init__(self, None)
mainLayout = QtGui.QVBoxLayout()
self.setLayout(mainLayout)
# Toolbar
toolbar = QtGui.QToolBar()
mainLayout.addWidget(toolbar)
# Action are added/created using the toolbar.addAction
# which creates a QAction, and returns a pointer..
# .. instead of myAct = new QAction().. toolbar.AddAction(myAct)
# see also menu.addAction and others
self.actionAdd = toolbar.addAction("New", self.on_action_add)
self.actionEdit = toolbar.addAction("Edit", self.on_action_edit)
self.actionDelete = toolbar.addAction("Delete", self.on_action_delete)
self.actionDelete.setDisabled(True)
# Tree
self.tree = QtGui.QTreeView()
mainLayout.addWidget(self.tree)
self.tree.setContextMenuPolicy( Qt.CustomContextMenu )
self.connect(self.tree, QtCore.SIGNAL('customContextMenuRequested(const QPoint&)'), self.on_context_menu)
# Popup Menu is not visible, but we add actions from above
self.popMenu = QtGui.QMenu( self )
self.popMenu.addAction( self.actionEdit )
self.popMenu.addAction( self.actionDelete )
self.popMenu.addSeparator()
self.popMenu.addAction( self.actionAdd )
def on_context_menu(self, point):
self.popMenu.exec_( self.tree.mapToGlobal(point) )