Re: [gtk-list] Question about GtkTree

[David Helder <dhelder umich edu>]

I think you're on the right track - use the button_press_event.

Here's some sample code:

/* Connect button_press_event to tree and have it call tree_button_press
 */
  gtk_signal_connect (GTK_OBJECT(tree), "button_press_event",
		      GTK_SIGNAL_FUNC(tree_button_press), NULL);


static gint
tree_button_press (GtkWidget *widget, GdkEventButton *event, void *data)
{
  if (debug_level >= 3)
    g_print ("tree_button_press\n");

  /* if event->type == GDK_2BUTTON_PRESS, it's a double click */

  /* here's some more sample code related to CTree's, which you 
	might want to switch to.  */
  if (event->button == 3) 
    {
      /* Handle someone clicking the 3rd mouse button */

      /* Get the selection information */
      gtk_clist_get_selection_info (GTK_CLIST(tree), event->x, event->y,
				    &row, &column);

      /* Select the clicked row */
      if (row > -1) 
	gtk_clist_select_row (GTK_CLIST(tree), row, 0);

      /* Down here I display a popup menu */
	[...]

      return TRUE;
    }
  return FALSE;
}



On Tue, 26 Jan 1999, Achint Sandhu wrote:

> Hi,
> 
> 	Another newbie question. I am trying to run a callback if someone
> double clicks an item in a GtkTree. My original declaration for the
> callback was:
> void selectionChangedInTree(GtkWidget *theTree, gpointer object);
> 	I changed this to
> void selectionChangedInTree(GtkWidget *theTree, GdkEvent *event, 
> 				gpointer object);
> 	and tried to look at the <event> to figure out whether the selection
> was a single click or a double click. I was using the following code to
> connect the signal:
>   gtk_signal_connect(GTK_OBJECT(aTree), "selection_changed",
> 		     GTK_SIGNAL_FUNC(selectionChangedInTree),
> 		     (gpointer) this);
> 	This approach did not work, so I started looking at the different
> events I could use. I looked into the "button_press_event", but did not
> get very far with that. 
> 
> 	Any help/sample code would be greatly appreciated ...
> 
> Cheers,
> Achint
> 
> -- 
> Achint Sandhu
> Nortel Networks
> 
> It must be remembered that there is nothing more difficult to plan, more
> doubtful of success, nor more dangerous to manage, than the creation of
> a
> new system.  For the initiator has the enmity of all who would profit by
> the preservation of the old institutions and merely lukewarm defenders
> in
> those who would gain by the new ones.
>                     -- Machiavelli
> 
> -- 
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> 

      __          _    __  
  ___/ /__ __  __(_)__/ /  David Helder - University of Michigan
 / _  / _ `/ |/ / / _  /   dhelder@umich.edu
 \_,_/\_,_/|___/_/\_,_/    http://www.eecs.umich.edu/~dhelder