/* example-start tree tree.c */
#include <gtk/gtk.h>
/* for all the GtkItem:: and GtkTreeItem:: signals */
static void cb_itemsignal( GtkWidget *item,
gchar *signame )
{
gchar *name;
GtkLabel *label;
/* It's a Bin, so it has one child, which we know to be a
label, so get that */
label = GTK_LABEL (GTK_BIN (item)->child);
/* Get the text of the label */
gtk_label_get (label, &name);
/* Get the level of the tree which the item is in */
g_print ("%s called for item %s->%p, level %d\n", signame, name,
item, GTK_TREE (item->parent)->level);
}
/* Note that this is never called */
static void cb_unselect_child( GtkWidget *root_tree,
GtkWidget *child,
GtkWidget *subtree )
{
g_print ("unselect_child called for root tree %p, subtree %p, child %p\n",
root_tree, subtree, child);
}
/* Note that this is called every time the user clicks on an item,
whether it is already selected or not. */
static void cb_select_child (GtkWidget *root_tree, GtkWidget *child,
GtkWidget *subtree)
{
g_print ("select_child called for root tree %p, subtree %p, child %p\n",
root_tree, subtree, child);
}
static void cb_selection_changed( GtkWidget *tree )
{
GList *i;
g_print ("selection_change called for tree %p\n", tree);
g_print ("selected objects are:\n");
i = GTK_TREE_SELECTION(tree);
while (i){
gchar *name;
GtkLabel *label;
GtkWidget *item;
/* Get a GtkWidget pointer from the list node */
item = GTK_WIDGET (i->data);
label = GTK_LABEL (GTK_BIN (item)->child);
gtk_label_get (label, &name);
g_print ("\t%s on level %d\n", name, GTK_TREE
(item->parent)->level);
i = i->next;
}
}
int main( int argc,
char *argv[] )
{
GtkWidget *window, *scrolled_win, *tree;
static gchar *itemnames[] = {"Foo", "Bar", "Baz", "Quux",
"Maurice"};
gint i;
gtk_init (&argc, &argv);
/* a generic toplevel window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_signal_connect (GTK_OBJECT(window), "delete_event",
GTK_SIGNAL_FUNC (gtk_main_quit), NULL);
gtk_container_set_border_width (GTK_CONTAINER(window), 5);
/* A generic scrolled window */
scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_widget_set_usize (scrolled_win, 150, 200);
gtk_container_add (GTK_CONTAINER(window), scrolled_win);
gtk_widget_show (scrolled_win);
/* Create the root tree */
tree = gtk_tree_new();
g_print ("root tree is %p\n", tree);
/* connect all GtkTree:: signals */
gtk_signal_connect (GTK_OBJECT(tree), "select_child",
GTK_SIGNAL_FUNC(cb_select_child), tree);
gtk_signal_connect (GTK_OBJECT(tree), "unselect_child",
GTK_SIGNAL_FUNC(cb_unselect_child), tree);
gtk_signal_connect (GTK_OBJECT(tree), "selection_changed",
GTK_SIGNAL_FUNC(cb_selection_changed), tree);
/* Add it to the scrolled window */
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW(scrolled_win),
tree);
/* Set the selection mode */
gtk_tree_set_selection_mode (GTK_TREE(tree),
GTK_SELECTION_MULTIPLE);
/* Show it */
gtk_widget_show (tree);
for (i = 0; i < 5; i++){
GtkWidget *subtree, *item;
gint j;
/* Create a tree item */
item = gtk_tree_item_new_with_label (itemnames[i]);
/* Connect all GtkItem:: and GtkTreeItem:: signals */
gtk_signal_connect (GTK_OBJECT(item), "select",
GTK_SIGNAL_FUNC(cb_itemsignal), "select");
gtk_signal_connect (GTK_OBJECT(item), "deselect",
GTK_SIGNAL_FUNC(cb_itemsignal), "deselect");
gtk_signal_connect (GTK_OBJECT(item), "toggle",
GTK_SIGNAL_FUNC(cb_itemsignal), "toggle");
gtk_signal_connect (GTK_OBJECT(item), "expand",
GTK_SIGNAL_FUNC(cb_itemsignal), "expand");
gtk_signal_connect (GTK_OBJECT(item), "collapse",
GTK_SIGNAL_FUNC(cb_itemsignal), "collapse");
/* Add it to the parent tree */
gtk_tree_append (GTK_TREE(tree), item);
/* Show it - this can be done at any time */
gtk_widget_show (item);
/* Create this item's subtree */
subtree = gtk_tree_new();
g_print ("-> item %s->%p, subtree %p\n", itemnames[i], item,
subtree);
/* This is still necessary if you want these signals to be called
for the subtree's children. Note that selection_change will be
signalled for the root tree regardless. */
gtk_signal_connect (GTK_OBJECT(subtree), "select_child",
GTK_SIGNAL_FUNC(cb_select_child), subtree);
gtk_signal_connect (GTK_OBJECT(subtree), "unselect_child",
GTK_SIGNAL_FUNC(cb_unselect_child), subtree);
/* This has absolutely no effect, because it is completely ignored
in subtrees */
gtk_tree_set_selection_mode (GTK_TREE(subtree),
GTK_SELECTION_SINGLE);
/* Neither does this, but for a rather different reason - the
view_mode and view_line values of a tree are propagated to
subtrees when they are mapped. So, setting it later on would
actually have a (somewhat unpredictable) effect */
gtk_tree_set_view_mode (GTK_TREE(subtree), GTK_TREE_VIEW_ITEM);
/* Set this item's subtree - note that you cannot do this until
AFTER the item has been added to its parent tree! */
gtk_tree_item_set_subtree (GTK_TREE_ITEM(item), subtree);
for (j = 0; j < 5; j++){
GtkWidget *subitem;
/* Create a subtree item, in much the same way */
subitem = gtk_tree_item_new_with_label (itemnames[j]);
/* Connect all GtkItem:: and GtkTreeItem:: signals */
gtk_signal_connect (GTK_OBJECT(subitem), "select",
GTK_SIGNAL_FUNC(cb_itemsignal), "select");
gtk_signal_connect (GTK_OBJECT(subitem), "deselect",
GTK_SIGNAL_FUNC(cb_itemsignal), "deselect");
/* gtk_signal_connect (GTK_OBJECT(subitem), "toggle",
GTK_SIGNAL_FUNC(cb_itemsignal), "toggle");
gtk_signal_connect (GTK_OBJECT(subitem), "expand",
GTK_SIGNAL_FUNC(cb_itemsignal), "expand");
gtk_signal_connect (GTK_OBJECT(subitem), "collapse",
GTK_SIGNAL_FUNC(cb_itemsignal), "collapse");*/
g_print ("-> -> item %s->%p\n", itemnames[j], subitem);
/* Add it to its parent tree */
gtk_tree_append (GTK_TREE(subtree), subitem);
/* Show it */
gtk_widget_show (subitem);
}
}
/* Show the window and loop endlessly */
gtk_widget_show (window);
gtk_main();
return 0;
}
/* example-end */