#include "config.h"
#include <gtk/gtk.h>
#include <stdio.h>
/* This is our data identification string to store
* data in list items
*/
const gchar *list_item_data_key="list_item_data";
/* prototypes for signal handler that we are going to connect
* to the List widget
*/
static void sigh_print_selection( GtkWidget *gtklist,
gpointer func_data);
static void sigh_button_event( GtkWidget *gtklist,
GdkEventButton *event,
GtkWidget *frame );
/* Main function to set up the user interface */
gint main( int argc,
gchar *argv[] )
{
GtkWidget *separator;
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *scrolled_window;
GtkWidget *frame;
GtkWidget *gtklist;
GtkWidget *button;
GtkWidget *list_item;
GList *dlist;
guint i;
gchar buffer[64];
/* Initialize GTK (and subsequently GDK) */
gtk_init (&argc, &argv);
/* Create a window to put all the widgets in
* connect gtk_main_quit() to the "destroy" event of
* the window to handle window manager close-window-events
*/
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "GtkList Example");
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_main_quit),
NULL);
/* Inside the window we need a box to arrange the widgets
* vertically */
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);
/* This is the scrolled window to put the List widget inside */
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_widget_set_size_request (scrolled_window, 250, 150);
gtk_container_add (GTK_CONTAINER (vbox), scrolled_window);
gtk_widget_show (scrolled_window);
/* Create thekList widget.
* Connect the sigh_print_selection() signal handler
* function to the "selection_changed" signal of the List
* to print out the selected items each time the selection
* has changed */
gtklist=gtk_list_new ();
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_window),
gtklist);
gtk_widget_show (gtklist);
g_signal_connect (gtklist, "selection-changed",
G_CALLBACK (sigh_print_selection),
NULL);
/* We create a "Prison" to put a list item in ;) */
frame=gtk_frame_new ("Prison");
gtk_widget_set_size_request (frame, 200, 50);
gtk_container_set_border_width (GTK_CONTAINER (frame), 5);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (vbox), frame);
gtk_widget_show (frame);
/* Connect the sigh_button_event() signal handler to the List
* which will handle the "arresting" of list items
*/
g_signal_connect (gtklist, "button-release-event",
G_CALLBACK (sigh_button_event),
frame);
/* Create a separator */
separator=gtk_hseparator_new ();
gtk_container_add (GTK_CONTAINER (vbox), separator);
gtk_widget_show (separator);
/* Finally create a button and connect its "clicked" signal
* to the destruction of the window */
button=gtk_button_new_with_label ("Close");
gtk_container_add (GTK_CONTAINER (vbox), button);
gtk_widget_show (button);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gtk_widget_destroy),
window);
/* Now we create 5 list items, each having its own
* label and add them to the List using gtk_container_add()
* Also we query the text string from the label and
* associate it with the list_item_data_key for each list item
*/
for (i = 0; i < 5; i++) {
GtkWidget *label;
gchar *string;
sprintf(buffer, "ListItemContainer with Label #%d", i);
label=gtk_label_new (buffer);
list_item=gtk_list_item_new ();
gtk_container_add (GTK_CONTAINER (list_item), label);
gtk_widget_show (label);
gtk_container_add (GTK_CONTAINER (gtklist), list_item);
gtk_widget_show (list_item);
gtk_label_get (GTK_LABEL (label), &string);
g_object_set_data (G_OBJECT (list_item), list_item_data_key, string);
}
/* Here, we are creating another 5 labels, this time
* we use gtk_list_item_new_with_label() for the creation
* we can't query the text string from the label because
* we don't have the labels pointer and therefore
* we just associate the list_item_data_key of each
* list item with the same text string.
* For adding of the list items we put them all into a doubly
* linked list (GList), and then add them by a single call to
* gtk_list_append_items().
* Because we use g_list_prepend() to put the items into the
* doubly linked list, their order will be descending (instead
* of ascending when using g_list_append())
*/
dlist = NULL;
for (; i < 10; i++) {
sprintf(buffer, "List Item with Label %d", i);
list_item = gtk_list_item_new_with_label (buffer);
dlist = g_list_prepend (dlist, list_item);
gtk_widget_show (list_item);
g_object_set_data (G_OBJECT (list_item),
list_item_data_key,
"ListItem with integrated Label");
}
gtk_list_append_items (GTK_LIST (gtklist), dlist);
/* Finally we want to see the window, don't we? ;) */
gtk_widget_show (window);
/* Fire up the main event loop of gtk */
gtk_main ();
/* We get here after gtk_main_quit() has been called which
* happens if the main window gets destroyed
*/
return 0;
}
/* This is the signal handler that got connected to button
* press/release events of the List
*/
void sigh_button_event( GtkWidget *gtklist,
GdkEventButton *event,
GtkWidget *frame )
{
/* We only do something if the third (rightmost mouse button
* was released
*/
if (event->type == GDK_BUTTON_RELEASE &&
event->button == 3) {
GList *dlist, *free_list;
GtkWidget *new_prisoner;
/* Fetch the currently selected list item which
* will be our next prisoner ;)
*/
dlist = GTK_LIST (gtklist)->selection;
if (dlist)
new_prisoner = GTK_WIDGET (dlist->data);
else
new_prisoner = NULL;
/* Look for already imprisoned list items, we
* will put them back into the list.
* Remember to free the doubly linked list that
* gtk_container_children() returns
*/
dlist = gtk_container_children (GTK_CONTAINER (frame));
free_list = dlist;
while (dlist) {
GtkWidget *list_item;
list_item = dlist->data;
gtk_widget_reparent (list_item, gtklist);
dlist = dlist->next;
}
g_list_free (free_list);
/* If we have a new prisoner, remove him from the
* List and put him into the frame "Prison".
* We need to unselect the item first.
*/
if (new_prisoner) {
GList static_dlist;
static_dlist.data = new_prisoner;
static_dlist.next = NULL;
static_dlist.prev = NULL;
gtk_list_unselect_child (GTK_LIST (gtklist),
new_prisoner);
gtk_widget_reparent (new_prisoner, frame);
}
}
}
/* This is the signal handler that gets called if List
* emits the "selection_changed" signal
*/
void sigh_print_selection( GtkWidget *gtklist,
gpointer func_data )
{
GList *dlist;
/* Fetch the doubly linked list of selected items
* of the List, remember to treat this as read-only!
*/
dlist = GTK_LIST (gtklist)->selection;
/* If there are no selected items there is nothing more
* to do than just telling the user so
*/
if (!dlist) {
g_print ("Selection cleared\n");
return;
}
/* Ok, we got a selection and so we print it
*/
g_print ("The selection is a ");
/* Get the list item from the doubly linked list
* and then query the data associated with list_item_data_key.
* We then just print it */
while (dlist) {
const gchar *item_data_string;
item_data_string = g_object_get_data (G_OBJECT (dlist->data),
list_item_data_key);
g_print("%s ", item_data_string);
dlist = dlist->next;
}
g_print ("\n");
}