[Gtk-sharp-list] Sorting a TreeView by clicking the headers

[Peter Williams]

Hi,

There is indeed a Clicked event that a TreeViewColumn will emit. The
problem I had is that it didn't seem to be possible to unsort the
columns once they got sorted. Here's some code I used (warning: old and
hasn't been tested in a while):

        public abstract class WonderColumn : TreeViewColumn {
 
                public enum SortState { None, Up, Down };
                 
                protected SortState sort;
 
                public WonderColumn () : base () {
			// ...

                        Clickable = true;
                        sort = SortState.None;
                        SortColumnId = TextColumn;
                        Clicked += new EventHandler (OnClicked);
                }

		// ....

                protected void OnClicked (object sender, EventArgs args) {
                        switch (sort) {
                        case SortState.None:
                                sort = SortState.Down;
                                break;
                        case SortState.Down:
                                sort = SortState.Up;
                                break;
                        case SortState.Up:
				// would like to go back to SortState.None
                                sort = SortState.Down;
                                break;
                        }
                                                                                                                                                             
                        switch (sort) {
                        case SortState.None:
                                SortIndicator = false;
                                break;
                        case SortState.Down:
                                SortIndicator = true;
                                SortOrder = SortType.Ascending;
                                break;
                        case SortState.Up:
                                SortIndicator = true;
                                SortOrder = SortType.Descending;
                                break;
                        }
                }
	}

Peter

On Wed, 2004-06-30 at 17:07, Christian Ziegner wrote:
> Hi there,
> 
> i've got a question regarding the widget GtkTreeView. I simply want to
> alphabetically sort a tree (or a list, doesn't matter...) with two
> columns by clicking at the headers of the TreeView. The only i have
> found out yet is the attribute TreeView.HeadersClickable. Setting this
> to true doesn't do anything, apparently. Does anyone here know how to
> implement this feature? The GUI was created using Glade and i couldn`t
> find any signals corresponding to this functionality, nor do i know how
> to adress the headers of the column as they are not an own widget. Many
> thanks in advance!
> 
> Greetings,
> Chris
> 
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-- 
Peter Williams                          peter@newton.cx

"[Ninjas] are cool; and by cool, I mean totally sweet."
                              -- REAL Ultimate Power