QTreeWidget上的彈出菜單右鍵點擊python

Question

我想用python編寫一個程序，它包含一個treewidget，並且在點擊鼠標右鍵後可以添加，重命名和刪除集羣。 我很新的使用Python，這是我到目前爲止的代碼：

from PyQt4 import QtCore, QtGui 

try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    def _fromUtf8(s): 
     return s 

try: 
    _encoding = QtGui.QApplication.UnicodeUTF8 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig, _encoding) 
except AttributeError: 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig) 

class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName(_fromUtf8("MainWindow")) 
     MainWindow.resize(800, 600) 
     self.centralwidget = QtGui.QWidget(MainWindow) 
    self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 
    self.treeWidget = QtGui.QTreeWidget(self.centralwidget) 
    self.treeWidget.setGeometry(QtCore.QRect(155, 50, 481, 361)) 
    self.treeWidget.setObjectName(_fromUtf8("treeWidget")) 
    MainWindow.setCentralWidget(self.centralwidget) 
    self.menubar = QtGui.QMenuBar(MainWindow) 
    self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 25)) 
    self.menubar.setObjectName(_fromUtf8("menubar")) 
    MainWindow.setMenuBar(self.menubar) 
    self.statusbar = QtGui.QStatusBar(MainWindow) 
    self.statusbar.setObjectName(_fromUtf8("statusbar")) 
    MainWindow.setStatusBar(self.statusbar) 

    self.retranslateUi(MainWindow) 
    self.buildingTree() 
    QtCore.QMetaObject.connectSlotsByName(MainWindow) 


def retranslateUi(self, MainWindow): 
    MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None)) 
    self.treeWidget.headerItem().setText(0, _translate("MainWindow", "Assignment1", None)) 
    __sortingEnabled = self.treeWidget.isSortingEnabled() 


def buildingTree(self): 
    item_0 = QtGui.QTreeWidgetItem(self.treeWidget) 
    item_1 = QtGui.QTreeWidgetItem(item_0) 
    item_2 = QtGui.QTreeWidgetItem(item_1) 
    item_1 = QtGui.QTreeWidgetItem(item_0) 
    item_2 = QtGui.QTreeWidgetItem(item_1) 
    self.treeWidget.setSortingEnabled(False) 
    self.treeWidget.topLevelItem(0).setText(0, _translate("MainWindow", "default", None)) 
    self.treeWidget.topLevelItem(0).child(0).setText(0, _translate("MainWindow", "cluster1", None)) 
    self.treeWidget.topLevelItem(0).child(0).child(0).setText(0, _translate("MainWindow", "clusterA", None)) 
    self.treeWidget.topLevelItem(0).child(1).setText(0, _translate("MainWindow", "cluster2", None)) 
    self.treeWidget.topLevelItem(0).child(1).child(0).setText(0, _translate("MainWindow", "clusterA", None)) 



if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

可能有人請告訴我，我怎麼打開一個彈出菜單用鼠標右鍵點擊某個簇後？ 提前謝謝！

Answer 1

我找到了答案。 它看起來像這樣：

def new_cluster(self): 
    print "New Cluster" 

def rename_cluster(self): 
    print "Rename cluster" 

def delete_cluster(self): 
    print "Delete cluster" 

def create_popup_menu(self, parent=None): 
    self.popup_menu = QtGui.QMenu(parent) 
    self.popup_menu.addAction("New", self.new_cluster) 
    self.popup_menu.addAction("Rename", self.rename_cluster) 
    self.popup_menu.addSeparator() 
    self.popup_menu.addAction("Delete", self.delete_cluster) 

def on_context_menu(self, pos):   
    node = self.treeWidget.mapToGlobal(pos) 
    self.popup_menu.exec_(self.treeWidget.mapToGlobal(pos))