Novice
Bind entire class /structure to a view control
Hi,
I have a structure consists of 5 fields each of different data type which I want to bind to a Treeview control. Even though entire structure is mapped, the Treeview should list only one field from the structure. How to do ModelView in this scenario and how can I filter out which one to display. I am expecting a approach similar to WPF (model) ,where we can bind entire class object to the view. Please help as i have no idea of how to proceed
Guru
Re: Bind entire class /structure to a view control
The usual solution in this case is to put a QSortFilterProxyModel between your source model and the QTreeView (in Qt land, there are "views" and "widgets", not "controls" - you need to clear your brain of the WPF and MFC poisons). You will derive a new class from QSortFilterProxyModel and reimplement the QSortFilterProxyModel::filterAcceptsRow() or filterAcceptsColumn() methods (along with the map*(), data(), rowCount(), columnCount() and probably some other methods. The filterAccepts*() functions are Boolean methods, which return true if the row / column should be displayed and false otherwise.
There is too much detail to go into here. You should take a look at the QSortFilterProxyModel documentation and at the Qt examples for basic and custom filters.
<=== The Great Pumpkin says ===>
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Novice
Re: Bind entire class /structure to a view control
Thank you so much!
The "Q"
Re: Bind entire class /structure to a view control
For simple cases maybe it's enough to hide unwanted columns directly in the view.
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Novice
Re: Bind entire class /structure to a view control
How can I show only one column if i have 6 columns?
Guru
Re: Bind entire class /structure to a view control
Maybe by calling QTreeView::setColumnHidden() ?How can I show only one column if i have 6 columns?
<=== The Great Pumpkin says ===>
Please use CODE tags when posting source code so it is more readable. Click "Go Advanced" and then the "#" icon to insert the tags. Paste your code between them.
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