Maybe a good improving of GTK would be to offer some methods that will
simply transformed an IList, ICollection and datatable to a
ListStore/TreeStore.
My two cents.
Thierry
Miguel de Icaza wrote:
Hello,
Some things I find annoying :
- It seems we had to use ListStore for TreeView.Model, and it seems
ListStore is a simple another list object... There is always many
lists types in System.Collections, why should we use another lis type
for treeview for instance ? An IList would be better, no ?
Actually the ListStore is not a simple list object, it is a fairly
elaborate "storage" for treemodels that happens to be flat.
The list/tree widget in Gtk# is actually always a tree. But depending
on the model implementation it can behave as either a tree or a list.
ListStore is what makes the TreeView behave like a list of elements.
But I see what you want: you want to reuse the same IList API there.
Do you have a sample program that you could share with us that you would
like transformed into an IList-based sample? That would help us.
- I find some things very weird. To get the entry selected in a
TreeView, it seems we have to write an overcomplicated-for-the-job
code :
TreeIter iter;
TreeModel model;
TreeSelection sel = myTreeView.Selection;
if(sel.GetSelected(out model, out iter)) {
int thing = (int)model.GetValue( iter, 5 );
And so on.
A simple thing like that could not be possible ? :
int thing = (int) myTreeView.EntrySelected(5);
or, even better, a thing like that :
MyObject my = (MyObject) myTreeView.EntrySelected();
This sounds like a useful addition, we could file a feature request, but
but there are two problems with your example:
* What happens if there is nothing selected? Should
we throw an exception? I think that would be a bad idea.
* What happens if you have multiple-selection enabled?
Perhaps the solution would be to have a method like this:
class TreeView {
// Return an array of objects for each row.
object [] GetSelected () {...}
// Return the array of objects for a specific column
object [] GetSelected (int column) { }
}
Miguel
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