[Qt-interest] Changing font size in QTableWidgetItem

[Paul England]

Malyushytsky, Alex wrote:
>>> tbl_main->item( row, col )->font().setPointSize( font_size );
>>>       
>
> Above code would not work cause you change a copy of the QFont object
> Look at font () declaration: "QFont font () const;". You does not change the font used by item.
>
> You should use setFont( ); as you did.
>
> If you are going to make a lot of changes, try to disable widget update using QWidget::setUpdatesEnabled, this should improve performance:
>
> setUpdatesEnabled(false);
> bigVisualChanges();
> setUpdatesEnabled(true);
>
>   

Thanks -- I will try this.

Why not set the font role on the model? 

Of course you would need a custom model, but if you can get away with a
tablewidget the model wont be too complex.


Model isn't going to work for this.  It's a very complex QTableWidget.  
Has data from multiple sockets, as well as user input.
> Best regards,
>    Alex
>
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Paul England
> Sent: Monday, January 19, 2009 3:21 PM
> To: qt-interest at trolltech.com
> Subject: [Qt-interest] Changing font size in QTableWidgetItem
>
> Hi
>
> Trying to change the font size of a QTableWidget (well, the
> QTableWidgetItems in the QTableWidget).
> Something like this works, but is painfully slow:
>
> QFont f( "Tahoma", 10, QFont::Bold );
> my_table->item( row, col )->setFont( f );
>
> For a table of 18 rows and about 40-50 columns,  it takes a few seconds
> to update.
> I tried this:
> tbl_main->item( row, col )->font().setPointSize( font_size );
>
> Doesn't really work, unfortunately.  Do I have to repaint it or something?
>
> Thanks
> Paul
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