开发PyQt4的树部件(Developing pyqt4 tree widget)

我需要写一棵树？在PyQt的。 它看起来像这样：

Clients(this is text)  
   Type A (this is a Clients child and has a checkbox)  
    Type B (this is a Clients child and has a checkbox)  
Vendors(this is text) 
    Mary  (this is a Vendors child and has a checkbox)   
    Arnold  (this is a Vendors child and has a checkbox)  
Time Period  
    Init(this is a Time Period child, and would be a calendarWidget for date selection)  
    End (this is a Time Period child, and would be a calendarWidget for date selection)  

你会推荐这算什么？ QTreeWidget ？ QTreeView? 这将是我将用它来建立SQL查询点击的项目。
谢谢阅读。

Answer 1:

我建议你使用QTreeWidget代替QTreeView则 ，因为你的任务是非常简单的。 QTreeView则 （含定制机型，例如QStandardItemModel ）是困难的事件。 你是简单的。

import sys
from PyQt4 import QtCore, QtGui


class Window(QtGui.QWidget):

    def __init__(self):
        QtGui.QWidget.__init__(self)
        self.treeWidget = QtGui.QTreeWidget()
        self.treeWidget.setHeaderHidden(True)
        self.addItems(self.treeWidget.invisibleRootItem())
        self.treeWidget.itemChanged.connect (self.handleChanged)
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.treeWidget)
        self.setLayout(layout)

    def addItems(self, parent):
        column = 0
        clients_item = self.addParent(parent, column, 'Clients', 'data Clients')
        vendors_item = self.addParent(parent, column, 'Vendors', 'data Vendors')
        time_period_item = self.addParent(parent, column, 'Time Period', 'data Time Period')

        self.addChild(clients_item, column, 'Type A', 'data Type A')
        self.addChild(clients_item, column, 'Type B', 'data Type B')

        self.addChild(vendors_item, column, 'Mary', 'data Mary')
        self.addChild(vendors_item, column, 'Arnold', 'data Arnold')

        self.addChild(time_period_item, column, 'Init', 'data Init')
        self.addChild(time_period_item, column, 'End', 'data End')

    def addParent(self, parent, column, title, data):
        item = QtGui.QTreeWidgetItem(parent, [title])
        item.setData(column, QtCore.Qt.UserRole, data)
        item.setChildIndicatorPolicy(QtGui.QTreeWidgetItem.ShowIndicator)
        item.setExpanded (True)
        return item

    def addChild(self, parent, column, title, data):
        item = QtGui.QTreeWidgetItem(parent, [title])
        item.setData(column, QtCore.Qt.UserRole, data)
        item.setCheckState (column, QtCore.Qt.Unchecked)
        return item

    def handleChanged(self, item, column):
        if item.checkState(column) == QtCore.Qt.Checked:
            print "checked", item, item.text(column)
        if item.checkState(column) == QtCore.Qt.Unchecked:
            print "unchecked", item, item.text(column)

if __name__ == "__main__":

    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())

文章来源: Developing pyqt4 tree widget