Spreadsheet of QCheckBoxes...help!

[JonathanForQT4]

Hello all,

I have just been told to program a spreadsheet looking area of checkboxes, each cell in the spread sheet being a checkbox.

The axis of the spreadsheet (rows) is the a unique object and the other axis (columns) are properties that can be turned on for each object. When a user clicks on a object name, all the properties for the object should be selected or unselected. If the user clicks on a property name then all the check boxes for each object should have that property selected or unselected....

Any ideas of how I should approach the problem?

Cheers,

Jonathan

[jacek]

Maybe you could use QTableView/QTreeView and a custom model with checkable items?

[JonathanForQT4]

from what I can see so far....you can set cells selected, but you can't set the cell to be a widget....they need to be of type QTableWidgetItem or did I miss something?

how would you implement this "custom model"?

thanks

Jonathan

[marcel]

What about QTableWidget::setCellWidget( int row, int col, QWidget* widget )?

Regards

[jacek]

how would you implement this "custom model"?
You will have to subclass QAbstractTableModel and implement few methods. Everything is described here:
http://doc.trolltech.com/4.3/qabstracttablemodel#subclassing
http://doc.trolltech.com/4.3/model-view-model-subclassing.html
A checkbox will appear if Qt::ItemIsUserCheckable flag is set for the given cell.

[JonathanForQT4]

jacek: I am very lost with this implementation....I would have to define row and column count to return the number of rows and columns?

since I didn't understand jacek's implementation I have gone ahead with marcel's.....the only thing I can quite get is, when I select a header, which selects all the column (or row)....which signal do I connect to one of my slots which goes through and selects all the qcheckboxes? I can't seem to find a signal that works for mass selection of the cells...only for single selection of the cell through double or single clicking.


cheers,

Jonathan

[jacek]

I would have to define row and column count to return the number of rows and columns?
Yes.


which signal do I connect to one of my slots which goes through and selects all the qcheckboxes?
Check QItemSelectionModel and QHeaderView classes. You can get pointers to their instances through QTableView methods.

[JonathanForQT4]

thanks guys, got everything working nicely :D