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Friday, January 27, 2012

Qt 4.8 Model/View Tutorial - Part 4

The following is based on code from the Qt 4.8 Model/View Tutorial - 2.4 Setting Up Headers for Columns and Rows.


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

'''
    PyQt4 conversion of Qt Model-View Tutorial
    
        Add headers to a table view by overriding 
        headerData().
        
    NOTES:
    =====
    Headers are shown/hidden using QTableView.verticalHeader().hide()
    but they are defined in the model.
    
    The Qt example only includes column headers, added row headers
    and set row and column header text color to red.
    
last modified: 2012-01-27 jg
ref:
    http://developer.qt.nokia.com/doc/qt-4.8/modelview.html#2-3-a-clock-inside-a-table-cell
    
'''
from PyQt4.QtGui import (QApplication, QTableView, QColor)
from PyQt4.QtCore import (Qt, QAbstractTableModel, QModelIndex)

class MyModel(QAbstractTableModel):
    def __init__(self, parent=None):    # initialise base class
        super(MyModel, self).__init__(parent)

    def rowCount(self, index=QModelIndex()):
        return 2

    def columnCount(self, index=QModelIndex()):
        return 3

    def headerData(self, section, orientation, role):
        if role == Qt.DisplayRole:
            if(orientation == Qt.Horizontal):
                if section == 0: return "Column One"
                elif section == 1: return "Column Two"
                elif section == 2: return "Column Three"
            elif(orientation == Qt.Vertical):
                if section == 0: return "Row One"
                elif section == 1: return "Row Two"
        elif role == Qt.TextColorRole:
            return QColor(Qt.red)

        return None

    def data(self, index, role):
        row = index.row()
        col = index.column()

        if role == Qt.DisplayRole:
            return "Row {0}, Column {1}".format(row + 1,
                                                col + 1)
        else:
            return None

# main ========================================================================

if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)
    tv = QTableView()

    myModel = MyModel()
    tv.setModel(myModel)
    tv.setWindowTitle("Adding Headers")
    tv.show()

    sys.exit(app.exec_())