PyQt5 Treeview

Created: September-25, 2018

PyQt5 支持树视图控件（类 QTreeView）。在本文中，我们将展示如何使用窗口小控件。

![PyQt5 TreeView](/img/Tutorial/PyQt5/PyQt5 TreeView.png)

该图像显示了一个 QTreeView 小控件，其中包含数据。

PyQt5 Treeview 示例

下面的代码将使用 QTreeView 类（使用 Python 3 运行）创建树视图。数据按代码添加到树视图中。代码的说明在代码下面。

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtGui import QIcon

from PyQt5.QtCore import (QDate, QDateTime, QRegExp, QSortFilterProxyModel, Qt,
        QTime)
from PyQt5.QtGui import QStandardItemModel
from PyQt5.QtWidgets import (QApplication, QCheckBox, QComboBox, QGridLayout,
        QGroupBox, QHBoxLayout, QLabel, QLineEdit, QTreeView, QVBoxLayout,
        QWidget)


class App(QWidget):

    FROM, SUBJECT, DATE = range(3)

    def __init__(self):
        super().__init__()
        self.title = 'PyQt5 Treeview Example - tastones.com'
        self.left = 10
        self.top = 10
        self.width = 640
        self.height = 240
        self.initUI()

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(self.left, self.top, self.width, self.height)

        self.dataGroupBox = QGroupBox("Inbox")
        self.dataView = QTreeView()
        self.dataView.setRootIsDecorated(False)
        self.dataView.setAlternatingRowColors(True)

        dataLayout = QHBoxLayout()
        dataLayout.addWidget(self.dataView)
        self.dataGroupBox.setLayout(dataLayout)

        model = self.createMailModel(self)
        self.dataView.setModel(model)
        self.addMail(model, '[email protected]', 'Your Github Donation','03/25/2017 02:05 PM')
        self.addMail(model, '[email protected]', 'Github Projects','02/02/2017 03:05 PM')
        self.addMail(model, '[email protected]', 'Your Phone Bill','01/01/2017 04:05 PM')

        mainLayout = QVBoxLayout()
        mainLayout.addWidget(self.dataGroupBox)
        self.setLayout(mainLayout)

        self.show()

    def createMailModel(self,parent):
        model = QStandardItemModel(0, 3, parent)
        model.setHeaderData(self.FROM, Qt.Horizontal, "From")
        model.setHeaderData(self.SUBJECT, Qt.Horizontal, "Subject")
        model.setHeaderData(self.DATE, Qt.Horizontal, "Date")
        return model

    def addMail(self,model, mailFrom, subject, date):
        model.insertRow(0)
        model.setData(model.index(0, self.FROM), mailFrom)
        model.setData(model.index(0, self.SUBJECT), subject)
        model.setData(model.index(0, self.DATE), date)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

Treeview 解释

我们使用以下行创建一个新的树视图对象：

self.dataView = QTreeView()

视图设置为具有模型，

self.dataView.setModel(model)

其中模型如下，

model = QStandardItemModel(0, 3, parent)
model.setHeaderData(self.FROM, Qt.Horizontal, "From")
model.setHeaderData(self.SUBJECT, Qt.Horizontal, "Subject")
model.setHeaderData(self.DATE, Qt.Horizontal, "Date")

然后我们使用以下方法添加

model.insertRow(0)
model.setData(model.index(0, self.FROM), mailFrom)
model.setData(model.index(0, self.SUBJECT), subject)
model.setData(model.index(0, self.DATE), date)