Weird behaviour of GtkCTree
- From: Louise Miller - Sun Microsystems Ireland - Computer Systems - Engineer <Louise Miller Sun COM>
- To: gtk-devel-list gnome org
- Subject: Weird behaviour of GtkCTree
- Date: Tue, 25 Sep 2001 19:27:05 +0100 (BST)
Hi,
I am writing an application with GtkCTree.
What I want the GtkCTree to do is :
When a parent node is selected, all the children of that node should also
be selected, i.e turn blue etc.
However I only seem to get this to work on certain situations :
If I select nodes using the up/down arrow keys - works
If I single-click a collapsed parent node and then expand it - works
Situations it doesnt work:
If I single-click an expanded parent node, the child node doesnt turn blue.
If I double-click a collapsed parent node, causing it to expand, child node isnt
blue
I edited a ctree example i found to illustrate the problem, its attached if
anyone wants to try it out.
Is there something I am missing out or is this a problem with GtkCTree?
Would really appreciate the help
Thanks
Louise
#include <gtk/gtk.h>
/* User clicked the "Add List" button. */
void button_add_clicked( gpointer data )
{
int indx;
/* Something silly to add to the list. 4 rows of 2 columns each */
gchar *drink[4][2] = { { "Milk", "3 Oz" },
{ "Water", "6 l" },
{ "Carrots", "2" },
{ "Snakes", "55" } };
gchar *food[4][2] = { { "sweet", "3 Oz" },
{ "more sweet", "6 l" },
{ "cake", "2" },
{ "more cakes", "55" } };
/* Here we do the actual adding of the text. It's done once for
* each row.
*/
for ( indx=0 ; indx < 4 ; indx++ ) {
GtkCTreeNode *node = gtk_ctree_insert_node((GtkCTree *) data, NULL, NULL, drink[indx],0,NULL, NULL,NULL,NULL, FALSE, TRUE);
gtk_ctree_insert_node((GtkCTree *) data, node, NULL, food[indx],0,NULL, NULL,NULL,NULL, FALSE, TRUE);
}
return;
}
/* User clicked the "Clear List" button. */
void button_clear_clicked( gpointer data )
{
/* Clear the list using gtk_clist_clear. This is much faster than
* calling gtk_clist_remove once for each row.
*/
gtk_clist_clear( (GtkCList *) data);
return;
}
/* If we come here, then the user has selected a row in the list. */
void selection_made( GtkCTree *ctree,
GtkCTreeNode *node,
gint column,
gpointer data )
{
gtk_signal_handler_block_by_func(GTK_OBJECT(ctree), selection_made, data);
gtk_ctree_select_recursive(GTK_CTREE(ctree),node);
gtk_signal_handler_unblock_by_func(GTK_OBJECT(ctree), selection_made, data);
return;
}
int main( int argc,
gchar *argv[] )
{
GtkWidget *window;
GtkWidget *vbox, *hbox;
GtkWidget *scrolled_window, *ctree;
GtkWidget *button_add, *button_clear;
gchar *titles[2] = { "Ingredients", "Amount" };
gtk_init(&argc, &argv);
window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_set_usize(GTK_WIDGET(window), 300, 150);
gtk_window_set_title(GTK_WINDOW(window), "GtkCList Example");
gtk_signal_connect(GTK_OBJECT(window),
"destroy",
GTK_SIGNAL_FUNC(gtk_main_quit),
NULL);
vbox=gtk_vbox_new(FALSE, 5);
gtk_container_set_border_width(GTK_CONTAINER(vbox), 5);
gtk_container_add(GTK_CONTAINER(window), vbox);
gtk_widget_show(vbox);
/* Create a scrolled window to pack the CList widget into */
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
gtk_box_pack_start(GTK_BOX(vbox), scrolled_window, TRUE, TRUE, 0);
gtk_widget_show (scrolled_window);
/* Create the CList. For this example we use 2 columns */
ctree = gtk_ctree_new( 2, 0);
/* When a selection is made, we want to know about it. The callback
* used is selection_made, and its code can be found further down */
gtk_signal_connect(GTK_OBJECT(ctree), "tree_select_row",
GTK_SIGNAL_FUNC(selection_made),
NULL);
/* It isn't necessary to shadow the border, but it looks nice :) */
gtk_clist_set_shadow_type (GTK_CLIST(ctree), GTK_SHADOW_OUT);
/* What however is important, is that we set the column widths as
* they will never be right otherwise. Note that the columns are
* numbered from 0 and up (to 1 in this case).
*/
gtk_clist_set_column_width (GTK_CLIST(ctree), 0, 150);
gtk_clist_set_selection_mode (GTK_CLIST(ctree),GTK_SELECTION_EXTENDED);
/* Add the CList widget to the vertical box and show it. */
gtk_container_add(GTK_CONTAINER(scrolled_window), ctree);
gtk_widget_show(ctree);
/* Create the buttons and add them to the window. See the button
* tutorial for more examples and comments on this.
*/
hbox = gtk_hbox_new(FALSE, 0);
gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 0);
gtk_widget_show(hbox);
button_add = gtk_button_new_with_label("Add List");
button_clear = gtk_button_new_with_label("Clear List");
gtk_box_pack_start(GTK_BOX(hbox), button_add, TRUE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(hbox), button_clear, TRUE, TRUE, 0);
/* Connect our callbacks to the three buttons */
gtk_signal_connect_object(GTK_OBJECT(button_add), "clicked",
GTK_SIGNAL_FUNC(button_add_clicked),
(gpointer) ctree);
gtk_signal_connect_object(GTK_OBJECT(button_clear), "clicked",
GTK_SIGNAL_FUNC(button_clear_clicked),
(gpointer) ctree);
gtk_widget_show(button_add);
gtk_widget_show(button_clear);
/* The interface is completely set up so we show the window and
* enter the gtk_main loop.
*/
gtk_widget_show(window);
gtk_main();
return(0);
}
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