TreeView - GitPress.io

Example Python program TreeView.py This program creates a PyQt GUI

Modules

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys

Classes

class MyMainWindow(QMainWindow):
class FormWidget(QWidget):

Methods

def init(self, parent=None):
def init(self, parent):

Code

Example Python PyQt program :

from PyQt5.QtCore import *
from PyQt5.QtGui  import *
from PyQt5.QtWidgets import *



import sys



class MyMainWindow(QMainWindow):

    def __init__(self, parent=None):

        super(MyMainWindow, self).__init__(parent)
        self.form_widget = FormWidget(self)
        self.setCentralWidget(self.form_widget)



class FormWidget(QWidget):

    def __init__(self, parent):
        super(FormWidget, self).__init__(parent)
        self.layout = QVBoxLayout(self)
        self.view = QTreeView()
        self.view.setSelectionBehavior(QAbstractItemView.SelectRows)

        model = QStandardItemModel()

        model.setHorizontalHeaderLabels(['col1', 'col2', 'col3'])

        self.view.setModel(model)

        self.view.setUniformRowHeights(True)

    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    # populate data

        for i in range(3):

            parent1 = QStandardItem('Family {}. Some long status text for sp'.format(i))

            for j in range(3):

                child1 = QStandardItem('Child {}'.format(i*3+j))

                child2 = QStandardItem('row: {}, col: {}'.format(i, j+1))

                child3 = QStandardItem('row: {}, col: {}'.format(i, j+2))

                parent1.appendRow([child1, child2, child3])

            model.appendRow(parent1) #if this line in second for loop, there's a duplicate insertion warning

        # span container columns
        #Display whole message of first collumm of each element
            self.view.setFirstColumnSpanned(i, self.view.rootIndex(), True)

    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    # expand third container

        index = model.indexFromItem(parent1)

        self.view.expand(index)

    # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    # select last row

        selmod = self.view.selectionModel()

        index2 = model.indexFromItem(child3)

        selmod.select(index2, QItemSelectionModel.Select|QItemSelectionModel.Rows)
        self.layout.addWidget(self.view)
        self.button1 = QPushButton("Button 1")
        self.layout.addWidget(self.button1)

        self.button2 = QPushButton("Button 2")
        self.layout.addWidget(self.button2)

#text edit widget
        self.text = QLineEdit()
        self.layout.addWidget(self.text)

# checklist widget
        self.salutations = ['Ahoy',
                            'Good day',
                            'Hello',
                            'Heyo',
                            'Hi',
                            'Salutations',
                            'Wassup',
                            'Yo']
        self.salutation = QComboBox()
        self.salutation.addItems(self.salutations)
        self.salutation.setMinimumWidth(285)
        self.salutation.move(110, 5)

        self.layout.addWidget(self.salutation)
        self.setLayout(self.layout)

app = QApplication([])
foo = MyMainWindow()
foo.show()
sys.exit(app.exec_())

Useful Links

Articles: https://python-commandments.org/
PyQt: https://pythonpyqt.com/
Tutorial: https://pythonprogramminglanguage.com/