[Qt-interest] boolean field checkbox QTableView

[Andreas Pakulat]

On 11.02.09 13:17:11, Linos wrote:
> Andreas Pakulat escribió:
> > On 11.02.09 10:50:42, Christopher Rasch-Olsen Raa wrote:
> >> 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"?
> >> 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.
> > 
> > I haven't use the sql-models/views yet myself but isn't it easier to
> > subclass QSqlTableModel, overwrite flags() as needed there (returning
> > Qt::UserCheckable for the right column) and then also data() to return a
> > meaningful value for the Qt::CheckStateRole. Then put the model into a
> > plain old QTableView and it just works. Without a custom item delegate or
> > anything else. At least this approach works with custom models as well as
> > QStandardItemModel.
> 
> I have tried to do that but without a delegate i see the checkbox correctly 
> checked or not but i see too the string value, anythink like "x True" in the 

Then data() still returns something meaningful for the DisplayRole which
you should be able to disable as well. That should also get rid of the
combobox.

Andreas

-- 
Cold hands, no gloves.