开发 pyqt4 树小部件

Posted 2023-03-29

【中文标题】开发 pyqt4 树小部件

【英文标题】：Developing pyqt4 tree widget

【发布时间】：2012-10-05 00:04:09

【问题描述】：

我需要写一棵树吗？，在 pyqt 中。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)  

您对此有何建议？ QTreeWidget? QTreeView? 这将是我将用于构建 sql 查询的可点击项目。 感谢阅读。

【参考方案1】：

我建议您使用QTreeWidget 而不是QTreeView，因为您的任务非常简单。 QTreeView（带有自定义模型，例如QStandardItemModel）用于困难事件。你的很简单。

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_())

【讨论】：

到 QTreeWidget 和 QTreeView 的链接已损坏。这是他们的 API：pyqt.sourceforge.net/Docs/PyQt4/classes.html