[Qt-interest] boolean field checkbox QTableView

[Christopher Rasch-Olsen Raa]

Onsdag 11 februar 2009 11:19:16 skrev Linos:
> Christopher Rasch-Olsen Raa escribió:
> > Onsdag 11 februar 2009 09:55:46 skrev Linos:
> >> Hello,
> >> I have a QTableView with a QSqlRelationalTableModel and i want the
> >> boolean colums to be checkboxes in display and edit, I have searching
> >> the forum but i have not understand the full picture here i think, i
> >> have tried two ways to do that:
> >>
> >> -Create a QItemDelegate subclass and reimplement the methods
> >> createEditor, setEditorData, setModelData and updateEditorGeometry to
> >> represent a checkbox on edit.
> >>
> >> -Create a QSortProxyModel subclass and reimplement flags to add a
> >> Qt.ItemIsUserCheckable on the boolean column an check for
> >> Qt::CheckStateRole in data method to reply with the boolean value of the
> >> column.
> >>
> >> If i use the sortproxymodel i get the checkbox in display with the
> >> correct values but i still see the "true, false" strings and to change
> >> the value i get a combobox with the values true or false.
> >>
> >> If i use the delegate i get the checkbox to edit on doble click but i
> >> dont see checkboxes in display mode, only my well know "true, false"
> >> strings.
> >>
> >> If i use the delegate and the sortproxymodel i get a checkbox on the
> >> left of the cell on display mode and when i try to change the value i
> >> see other checkbox at the right of the first where i can change the
> >> value, after i commit the change the second checkbox is gone and the
> >> left display checkbox shows the change.
> >>
> >> Do i have any way to have a checkbox column in display and edit (the
> >> same) and not see the text "true, false"?
> >>
> >> Thanks in advance.
> >> _______________________________________________
> >> Qt-interest mailing list
> >> Qt-interest at trolltech.com
> >> http://lists.trolltech.com/mailman/listinfo/qt-interest
> >
> > Hi,
> >
> > I recently looked for a way to do this myself. What I had to do was
> > create a QItemDelegate and use that on the checkable column. Next I
> > subclassed QSqlTableWidget and overloaded flags() so that returned the
> > proper flags for that column. Next I used
> > QTableView::openPersistentEditor() on the fields in the checkable column
> > to make them always display. There are some clues to be found in the
> > demo-applications.
> >
> > Hope this helps.
>
> Hi,
> 	isn't the persistent editor a performance hit for the tableview?
>
> Regards,
> Miguel Angel.
>

Indeed it is, but if you want to have the checkboxes show continuously then 
(from my limited understanding) that is the easiest way to go. You could of 
course grap what the checkbox paints before it is closed and place that in the 
checkbox's place when it is destroyed. Though I guess that would be a lot more 
work.

-- 
Christopher