开发pyqt4树小部件 [英] Developing pyqt4 tree widget

问题描述

我需要在pyqt中写一棵树吗?它看起来像这样:

i need to write a tree?, in pyqt. It looks like this:

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)  

您对此有什么建议?QTreeWidget?QTreeView?这将是我将用于构建 sql 查询的可点击项目.
感谢阅读.

What would you recommend for this? QTreeWidget? QTreeView? This will be clickable items that i'll use to build sql queries.
Thanks for reading.

推荐答案

我推荐你使用 QTreeWidget 而不是 QTreeView，因为您的任务非常简单.QTreeView(使用自定义模型，例如 QStandardItemModel) 用于困难事件.你的很简单.

I recommend you to use QTreeWidget instead of QTreeView, because your tasks are pretty simple. QTreeView (with custom model, for example QStandardItemModel) is for difficult events. Yours is simple.

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_())

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