Re: [gtkmm] custom cellrenderer - dynamically sizing TreeViewColumn



Code should be attached now. PG

On Fri, 2003-08-08 at 20:25, Peter Gasper wrote:
> I wrote a custom cell renderer. It works but the problem is that the
> widget used in edit mode was significantly wider than the normal(not
> being edited) cell display width. Not only that but there are several of
> these in the same treeview, so if each column was wide enough to display
> the whole edit widget there wouldn't be enough room. 
> 
> I thought of two solutions. One, somehow have the edit widget shown over
> the neighboring cells (no idea how to do this). Or two, when a cell is
> being edited, resize the width of the column to accommodate the whole
> edit widget. This I did, and it was pretty straightforward. 
> 
> But there is one bug. The column is resized alright. But the edit widget
> doesn't expand to take up the entire space, rather, it just fills the
> original column width. However if you click in the empty space to the
> right of the edit widget in the now larger column the program restarts
> the edit process and the edit widget completely fills the column.
> Likewise if you don't reset the column to a smaller size after the first
> edit the edit widget is correctly displayed (taking up the entire
> column) the second time the column is edited.
> 
> 
> Attached is an example I derived from the attachment at the following
> address:
> 
> http://mail.gnome.org/archives/gtkmm-list/2003-January/msg00107.html
> 
> The code to accomplish the resizing is in Comb_CellRenderer::on_edited() 
> and Comb_CellRenderer::start_editing_vfunc() in renderer.cc.
> 
> 
> My only possible solution so far is to try and catch a signal or function call
> which happens when someone starts editing a cell (via enter or clicking) and then
> resize the column there so that it is resized after someone initiates a cell edit
> but before the cell renderer is notified of this. But I haven't
> found one that works yet.
> 
> _______________________________________________
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-- 
Peter Gasper <pgasper designadvantage com>

Attachment: renderer.zip
Description: Zip archive



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