[Qt-interest] boolean field checkbox QTableView

[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.