How to read/update widget(s) in QTreeView

ShinSat

Hello,

I'm trying to implement a program that reads and updates a row in QTreeView using indexWidget, but no luck so far. (indexWidget always returns None... :<
Would you correct me to a right direction?
My current test code is as follows.

import sys, os, pprint, time
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class App(QWidget):
    def __init__(self):
        super().__init__()

        self.vbox = QVBoxLayout()
        self.view = QTreeView()
        self.view.setSelectionBehavior(QAbstractItemView.SelectRows)

        self.model = QStandardItemModel()
        self.model.setHorizontalHeaderLabels(['col1', 'col2', 'col3'])
        self.view.setModel(self.model)
        self.view.setUniformRowHeights(True)

        self.vbox.addWidget(self.view)
        self.setLayout(self.vbox)

        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])
            self.model.appendRow(parent1)
            # span container columns
            self.view.setFirstColumnSpanned(i, self.view.rootIndex(), True)

        # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        # expand third container
        index = self.model.indexFromItem(parent1)
        self.view.expand(index)
        # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        # select last row
        selmod = self.view.selectionModel()
        index2 = self.model.indexFromItem(child3)
        selmod.select(index2, QItemSelectionModel.Select|QItemSelectionModel.Rows)
        # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        #view.show()
        # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    def get_data_row(self, row):
        row_wgt = self.view.indexWidget(self.model.createIndex(1,1))
        self.model.appendRow(row_wgt)

if __name__ == '__main__':
    app = QApplication(sys.argv)

    wgt = App()
    wgt.show()

    wgt.get_data_row(0)

    sys.exit(app.exec_())

Many many thanks in advance for your help.
Regards,
Sat

mrjj

Hi
The data is in the model. Not the view.
So you would use its Data function
http://doc.qt.io/qt-5/qabstractitemmodel.html#data
to read and insert new data to the model with
insertRow

ShinSat

@mrjj It works! Thanks for your help!!
I'll continue to test further to reach to my goal. :)
BTW, I'm still not sure if dataChanged signal is required to emit to update/insert the model?

Regards,
Sat

mrjj

@ShinSat said in How to read/update widget(s) in QTreeView:

dataChanged

hi
Its normal to emit that to tell the view(s) that model/data has changed.
But if you didnt make you own setData() , it might do it automatically.

ShinSat

Thanks a lot, @mrjj
I'll carefully test, and then, go up to next level. :)

Regards,
Sat