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List:       pykde
Subject:    Re: [PyKDE] Abstract Table Model + TableView
From:       "Kelly Burkhart" <kelly.burkhart () gmail ! com>
Date:       2007-01-31 1:10:53
Message-ID: fa1e4ce70701301710p5a3c4dffy55f029f329c4e237 () mail ! gmail ! com
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That works perfectly.  Thanks!

-K

On 1/30/07, David Boddie <david@boddie.org.uk> wrote:
> On Tue Jan 30 23:45:23 MET 2007, Kelly Burkhart wrote:
>
> > I'm experimenting with QAbstractTableModel + QTableView and having a
> > difficult time getting what I expect.  I'm hoping with the attached
> > code to create a grid with a header and each cell showing some text.
> > Instead I'm getting a grid with no header (tableview.header().show()
> > has no effect) and cells that look like check box widgets.
> >
> > Can anyone spot some obvious problems with my code?
>
> Yes, you're returning QVariants containing empty strings when you mean
> to return invalid QVariants. Change all occurrences of QVariant('') to
> QVariant() and it should work as you expect.
>
> > With QTableView does one have to manually create header and enable
> > column resizing?  Or is there some hidden switch that I'm not touching
> > that enables this functionality?
>
> It should just work. There are some subtleties with expanding columns
> and rows to optimize the space allocated to items - just ask again if
> you encounter problems along those lines.
>
> David
>
> _______________________________________________
> PyKDE mailing list    PyKDE@mats.imk.fraunhofer.de
> http://mats.imk.fraunhofer.de/mailman/listinfo/pykde
>

["tst_tv.py" (text/x-python)]

#!/usr/bin/env python

import sys
import os
from PyQt4 import QtGui, QtCore

class TstModel( QtCore.QAbstractTableModel ):
    
    def __init__( self ):
        QtCore.QAbstractTableModel.__init__(self)

        self._header = ( 'col0', 'col1', 'col2' )
        self._itemsToKeep = 10
        self._itemIdx = 0
        self._items = [ ('item0', 'item0', 'item0'),
                        ('item1','item1','item1'),
                        ('item2','item2','item2') ]

    def rowCount( self, parent ):
        return len(self._items)

    def columnCount( self, parent ):
        return len(self._header)

    def data( self, index, role ):
        if not index.isValid():
            return QtCore.QVariant()

        if role != QtCore.Qt.DisplayRole:
            return QtCore.QVariant()

        row = index.row()
        col = index.column()
        
        if row < 0 or row >= len(self._items) or \
               col < 0 or col >= len(self._header):
            return QtCore.QVariant()

        return QtCore.QVariant(self._items[row][col])

    def headerData( self, section, orientation, role ):
        if orientation == QtCore.Qt.Horizontal and \
               role == QtCore.Qt.DisplayRole:
            return QtCore.QVariant( self._header[section] )

        return QtCore.QVariant()

    def flags( self, index ):
        return QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled

class TstTableView( QtGui.QTableView ):
    def __init__( self, model ):
        QtGui.QTableView.__init__(self)
        self.setModel(model)
        self.verticalHeader().hide()
        self.horizontalHeader().setResizeMode(0, QtGui.QHeaderView.Interactive)
        self.horizontalHeader().setResizeMode(1, QtGui.QHeaderView.Interactive)
        self.horizontalHeader().setResizeMode(2, QtGui.QHeaderView.Stretch)

class Tst:
    def run( self ):
        app = QtGui.QApplication(sys.argv)
        tm = TstModel()
        tv1 = TstTableView( tm )
        tv1.show()
        
        app.connect(app, QtCore.SIGNAL('lastWindowClosed()'), \
                    app, QtCore.SLOT('quit()'))
        sys.exit(app.exec_())

if __name__ == "__main__":
    tst = Tst()
    tst.run()



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