Friday, April 22, 2022

Create Treeview with PyQt6

 This demo program show how to create a side menu using a treeview.

The output:


 

The code:


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import sys
import os
from PyQt6.QtWidgets import QApplication,  QVBoxLayout, QWidget, QPushButton, QTreeView
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QFont, QColor, QStandardItemModel, QStandardItem

class StandardItem(QStandardItem):
    def __init__(self, txt='', font_size=12, set_bold=False, color=QColor(0, 0, 0), color1=QColor(0, 0, 0)):
        super().__init__()

        fnt = QFont('Open Sans', font_size)
        fnt.setBold(set_bold)

        self.setEditable(False)
        self.setForeground(color)
        self.setBackground(color1)
        self.setFont(fnt)
        self.setText(txt)

class Window(QWidget):

    def __init__(self):
        super(Window, self).__init__()
        
        self.initUI()
    
        
    def initUI(self):
        self.treeView = QTreeView()
        self.treeView.setHeaderHidden(True)

        treeModel = QStandardItemModel()
        rootNode = treeModel.invisibleRootItem()
        america = StandardItem('Accounting', 12, set_bold=True, color1=QColor('#4d88ff'))

        california = StandardItem(' Accounts Payable', 10, color1=QColor('#80aaff'))
        america.appendRow(california)

        oakland = StandardItem('   Vendors', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))
        sanfrancisco = StandardItem('   Incoming Invoice', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))
        sanjose = StandardItem('   Purchases', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))

        california.appendRow(oakland)
        california.appendRow(sanfrancisco)
        california.appendRow(sanjose)


        texas = StandardItem(' Accounts Receivable', 10, color1=QColor('#80aaff'))
        america.appendRow(texas)

        austin = StandardItem('   Customers', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))
        houston = StandardItem('   Outbound Invoices', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))
        cali = StandardItem('   Dunning', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))
        dallas = StandardItem('   Sales', 8, color=QColor('#3939ac'), color1=QColor('#b3ccff'))

        texas.appendRow(austin)
        texas.appendRow(houston)
        texas.appendRow(cali)
        texas.appendRow(dallas)


        # Canada 
        canada = StandardItem('Logistics', 12, set_bold=True, color1=QColor('#4d88ff'))

        alberta = StandardItem(' Inventory', 10, color1=QColor('#80aaff'))
        bc = StandardItem(' Materials', 10, color1=QColor('#80aaff'))
        ontario = StandardItem(' Deliveries', 10, color1=QColor('#80aaff'))
        canada.appendRows([alberta, bc, ontario])


        rootNode.appendRow(america)
        rootNode.appendRow(canada)

        self.treeView.setModel(treeModel)
        self.treeView.expandAll()
        self.treeView.doubleClicked.connect(self.getValue)
        self.treeView.setIndentation(0)
        self.treeView.setAlternatingRowColors(True)
        


        
        self.pb1 = QPushButton('Exit', self)
        self.pb1.setGeometry(self.width()-110, self.height()-40, 100, 30)       
        self.pb1.clicked.connect(onClick_pb1)
        
        self.pb2 = QPushButton('Click Me!', self)
        self.pb2.setGeometry(self.width()-220, self.height()-40, 100, 30)        
        self.pb2.clicked.connect(self.onClick_pb2)
        
        self.pb3 = QPushButton('Open Notepad', self)
        self.pb3.setGeometry(self.width()-330, self.height()-40, 100, 30)
        self.pb3.clicked.connect(onClick_pb3)

        self.setGeometry(50, 65, 650, 450)
        self.treeView.setFixedSize(170,self.height()-25)
        self.setWindowTitle('Post 24')
        windowLayout = QVBoxLayout(self)
        windowLayout.addWidget(self.treeView, alignment=Qt.AlignmentFlag.AlignTop)
        self.show()
        
    def resizeEvent(self, event):
        self.treeView.setFixedSize(170,self.height()-25)
        self.pb1.setGeometry(self.width()-110, self.height()-40, 100, 30)
        self.pb2.setGeometry(self.width()-220, self.height()-40, 100, 30)
        self.pb3.setGeometry(self.width()-330, self.height()-40, 100, 30)
    def onClick_pb2(self):
 
       print("clicked")
       
    def getValue(self, val):
        print(val.data())
        print(val.row())
        print(val.column())
        
def onClick_pb3():
    os.popen(r"C:\WINDOWS\system32\notepad.exe")


    
def onClick_pb1():
    exit()

def main():

    app = QApplication(sys.argv)
    ex = Window()
    sys.exit(app.exec())


if __name__ == '__main__':
    main()

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