QAbstractItemModel 自动设置检查状态

Question

我正在尝试自动检查 QTreeView 中的节点（例如，当用户加载某些数据时）。手动复选框勾选功能工作正常。我根据 http://rowinggolfer.blogspot.com.au/2010/05/qtreeview-and-qabractitemmodel-example.html 在树中搜索相关项目，即：

模型中：

def searchModel(self, person):
    def searchNode(node):
        for child in node.childItems:
            if person == child.person:
                index = self.createIndex(child.row(), 0, child)
                return index

            if child.childCount() > 0:
                result = searchNode(child)
                if result:
                    return result

    node_index = searchNode(self.parents[0])
    return node_index

def find_GivenName(self, fname):
    app = None
    for person in self.people:
        if person.fname == fname:
            app = person
            break
    if app != None:
        index = self.searchModel(app)
        return (True, index)            
    return (False, None)

然后我将相关节点传入模型来设置它的检查状态eg

model.setData(node_index, 2, QtCore.Qt.CheckStateRole)

模型中：

def setData(self, index, value, role):
    if role == Qt.CheckStateRole:
        row = index.row()
        self.args[row].checked = value            
    return True

但是相关节点的复选框没有被选中。有什么想法吗？

Answer 1

复选框被选中，但只有当鼠标悬停在相关节点上时才会被选中。根据 pyqt 文档 - 'when reimplementing the setData() function, the dataChanged() signal must be emitted explicitly' http://pyqt.sourceforge.net/Docs/PyQt4/qabstractitemmodel.html#dataChanged。我将模型中的 setData 方法更改为：

def setData(self, index, value, role):
    if role == Qt.CheckStateRole:
        row = index.row()
        self.args[row].checked = value  
        self.dataChanged.emit(index, index)
return True

这里有一些关于 dataChanged() 信号的有用信息：When to emit dataChanged from a QAbstractItemModel

QAbstractItemModel 自动设置检查状态

QAbstractItemModel set check state automatically

qt

pyqt

pyqt4