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我一直在嘗試了幾天，找出爲什麼我的QAbstractLisModel不會允許用戶切換三種狀態的可檢查項目。該模型返回flags（）方法中的Qt.IsTristate和Qt.ItemIsUserCheckable，但是當程序運行時，僅在編輯時切換Qt.Checked和Qt.Unchecked。PyQt QAbstractListModel似乎忽略三態標誌
class cboxModel(QtCore.QAbstractListModel):
def __init__(self, parent=None):
super(cboxModel, self).__init__(parent)
self.cboxes = [
['a',0],
['b',1],
['c',2],
['d',0]
]
def rowCount(self,index=QtCore.QModelIndex()):
return len(self.cboxes)
def data(self,index,role):
if not index.isValid: return QtCore.QVariant()
myname,mystate = self.cboxes[index.row()]
if role == QtCore.Qt.DisplayRole:
return QtCore.QVariant(myname)
if role == QtCore.Qt.CheckStateRole:
if mystate == 0:
return QtCore.QVariant(QtCore.Qt.Unchecked)
elif mystate == 1:
return QtCore.QVariant(QtCore.Qt.PartiallyChecked)
elif mystate == 2:
return QtCore.QVariant(QtCore.Qt.Checked)
return QtCore.QVariant()
def setData(self,index,value,role=QtCore.Qt.EditRole):
if index.isValid():
self.cboxes[index.row()][1] = value.toInt()[0]
self.emit(QtCore.SIGNAL("dataChanged(QModelIndex,QModelIndex)"),
index, index)
print self.cboxes
return True
return False
def flags(self,index):
if not index.isValid():
return QtCore.Qt.ItemIsEditable
return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsUserCheckable | QtCore.Qt.ItemIsTristate
你可以用這個測試，
class MainForm(QtGui.QMainWindow):
def __init__(self, parent=None):
super(MainForm, self).__init__(parent)
model = cboxModel(self)
self.view = QtGui.QListView()
self.view.setModel(model)
self.setCentralWidget(self.view)
app = QtGui.QApplication(sys.argv)
form = MainForm()
form.show()
app.exec_()
，看到只有2個狀態是可用的。我假設我錯過了一些簡單的東西。有任何想法嗎？謝謝！