Hi (this is a re-post, the first one didn't reach the list..)
I want a TreeView to be always ordered and also allow the user to move
rows from a "folder" to an other.
The problem is :
- If I set a TreeSortable.DefaultSortFunc, it seem that the TreeView is
not accepting drop's anymore.
Are TreeSortable.DefaultSortFunc and TreeView.Reorderable attribute
incompatible ?
I have attached an example that show what I'm trying to do.
### use case 1 with the two lines commented (see attached the file):
1) With the mouse, drag and drop the row named "Item 4" directly (not
just before or just after) on "Group 2"
Expected results :
- The row "Item 4" is now under "Group 2" and correctly ordered between
"Item 1" and "Item 5"
Actual result :
- The row "Item 4" is now the top most row in "Group 2"
### use case with the two lines uncommented (see attached the file):
1) With the mouse, drag and drop the row named "Item 4" directly (not
just before or just after) on "Group 2"
Expected results :
- The row "Item 4" is now under "Group 2" and correctly ordered between
"Item 1" and "Item 5"
Actual result :
- The drop seem to be refused the dragged row stay at the original
position in "Group 1"
David
using System;
using Gtk;
public class SampleTreeView : TreeView {
public SampleTreeView() {
TreeViewColumn treeViewColumn = new TreeViewColumn();
treeViewColumn.Title = "Column 1";
CellRendererText cellRendererText = new CellRendererText();
treeViewColumn.PackStart(cellRendererText, false);
treeViewColumn.AddAttribute(cellRendererText, "text", 0);
this.AppendColumn(treeViewColumn);
this.Model = new TreeStore(typeof(string));
TreeIter group1TreeIter = ((TreeStore)this.Model).AppendValues("Group 1");
TreeIter group2TreeIter = ((TreeStore)this.Model).AppendValues("Group 2");
((TreeStore)this.Model).AppendValues(group1TreeIter, "Item 4");
((TreeStore)this.Model).AppendValues(group1TreeIter, "Item 3");
((TreeStore)this.Model).AppendValues(group1TreeIter, "Item 2");
((TreeStore)this.Model).AppendValues(group2TreeIter, "Item 1");
((TreeStore)this.Model).AppendValues(group2TreeIter, "Item 5");
this.ExpandAll();
this.Reorderable = true;
// Drag and drop is working when those two lines are commented
//((TreeStore) this.Model).DefaultSortFunc = SortFunc;
//((TreeStore) this.Model).SetSortColumnId(-1, SortType.Ascending);
}
int SortFunc(TreeModel model, TreeIter iterA, TreeIter iterB){
return String.Compare(
(string) model.GetValue(iterA, 0),
(string) model.GetValue(iterB, 0)
);
}
}
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