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82f6ccd79c
2008-08-11 Sven Neumann <sven@gimp.org> * examples/*: updated the (quite outdated) examples to use canonical signal names as well. Removed some unneeded casts and trailing whitespace while I was on it... svn path=/trunk/; revision=21071
267 lines
8.2 KiB
C
267 lines
8.2 KiB
C
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#include "config.h"
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#include <gtk/gtk.h>
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#include <stdio.h>
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/* This is our data identification string to store
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* data in list items
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*/
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const gchar *list_item_data_key="list_item_data";
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/* prototypes for signal handler that we are going to connect
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* to the List widget
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*/
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static void sigh_print_selection( GtkWidget *gtklist,
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gpointer func_data);
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static void sigh_button_event( GtkWidget *gtklist,
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GdkEventButton *event,
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GtkWidget *frame );
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/* Main function to set up the user interface */
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gint main( int argc,
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gchar *argv[] )
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{
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GtkWidget *separator;
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GtkWidget *window;
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GtkWidget *vbox;
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GtkWidget *scrolled_window;
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GtkWidget *frame;
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GtkWidget *gtklist;
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GtkWidget *button;
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GtkWidget *list_item;
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GList *dlist;
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guint i;
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gchar buffer[64];
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/* Initialize GTK (and subsequently GDK) */
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gtk_init (&argc, &argv);
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/* Create a window to put all the widgets in
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* connect gtk_main_quit() to the "destroy" event of
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* the window to handle window manager close-window-events
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*/
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_title (GTK_WINDOW (window), "GtkList Example");
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_main_quit),
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NULL);
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/* Inside the window we need a box to arrange the widgets
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* vertically */
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vbox=gtk_vbox_new (FALSE, 5);
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gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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gtk_widget_show (vbox);
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/* This is the scrolled window to put the List widget inside */
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scrolled_window = gtk_scrolled_window_new (NULL, NULL);
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gtk_widget_set_size_request (scrolled_window, 250, 150);
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gtk_container_add (GTK_CONTAINER (vbox), scrolled_window);
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gtk_widget_show (scrolled_window);
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/* Create thekList widget.
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* Connect the sigh_print_selection() signal handler
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* function to the "selection_changed" signal of the List
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* to print out the selected items each time the selection
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* has changed */
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gtklist=gtk_list_new ();
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gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_window),
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gtklist);
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gtk_widget_show (gtklist);
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g_signal_connect (gtklist, "selection-changed",
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G_CALLBACK (sigh_print_selection),
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NULL);
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/* We create a "Prison" to put a list item in ;) */
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frame=gtk_frame_new ("Prison");
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gtk_widget_set_size_request (frame, 200, 50);
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gtk_container_set_border_width (GTK_CONTAINER (frame), 5);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
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gtk_container_add (GTK_CONTAINER (vbox), frame);
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gtk_widget_show (frame);
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/* Connect the sigh_button_event() signal handler to the List
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* which will handle the "arresting" of list items
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*/
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g_signal_connect (gtklist, "button-release-event",
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G_CALLBACK (sigh_button_event),
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frame);
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/* Create a separator */
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separator=gtk_hseparator_new ();
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gtk_container_add (GTK_CONTAINER (vbox), separator);
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gtk_widget_show (separator);
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/* Finally create a button and connect its "clicked" signal
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* to the destruction of the window */
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button=gtk_button_new_with_label ("Close");
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gtk_container_add (GTK_CONTAINER (vbox), button);
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gtk_widget_show (button);
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g_signal_connect_swapped (button, "clicked",
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G_CALLBACK (gtk_widget_destroy),
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window);
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/* Now we create 5 list items, each having its own
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* label and add them to the List using gtk_container_add()
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* Also we query the text string from the label and
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* associate it with the list_item_data_key for each list item
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*/
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for (i = 0; i < 5; i++) {
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GtkWidget *label;
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gchar *string;
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sprintf(buffer, "ListItemContainer with Label #%d", i);
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label=gtk_label_new (buffer);
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list_item=gtk_list_item_new ();
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gtk_container_add (GTK_CONTAINER (list_item), label);
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gtk_widget_show (label);
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gtk_container_add (GTK_CONTAINER (gtklist), list_item);
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gtk_widget_show (list_item);
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gtk_label_get (GTK_LABEL (label), &string);
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g_object_set_data (G_OBJECT (list_item), list_item_data_key, string);
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}
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/* Here, we are creating another 5 labels, this time
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* we use gtk_list_item_new_with_label() for the creation
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* we can't query the text string from the label because
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* we don't have the labels pointer and therefore
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* we just associate the list_item_data_key of each
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* list item with the same text string.
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* For adding of the list items we put them all into a doubly
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* linked list (GList), and then add them by a single call to
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* gtk_list_append_items().
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* Because we use g_list_prepend() to put the items into the
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* doubly linked list, their order will be descending (instead
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* of ascending when using g_list_append())
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*/
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dlist = NULL;
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for (; i < 10; i++) {
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sprintf(buffer, "List Item with Label %d", i);
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list_item = gtk_list_item_new_with_label (buffer);
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dlist = g_list_prepend (dlist, list_item);
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gtk_widget_show (list_item);
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g_object_set_data (G_OBJECT (list_item),
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list_item_data_key,
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"ListItem with integrated Label");
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}
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gtk_list_append_items (GTK_LIST (gtklist), dlist);
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/* Finally we want to see the window, don't we? ;) */
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gtk_widget_show (window);
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/* Fire up the main event loop of gtk */
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gtk_main ();
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/* We get here after gtk_main_quit() has been called which
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* happens if the main window gets destroyed
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*/
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return 0;
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}
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/* This is the signal handler that got connected to button
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* press/release events of the List
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*/
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void sigh_button_event( GtkWidget *gtklist,
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GdkEventButton *event,
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GtkWidget *frame )
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{
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/* We only do something if the third (rightmost mouse button
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* was released
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*/
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if (event->type == GDK_BUTTON_RELEASE &&
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event->button == 3) {
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GList *dlist, *free_list;
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GtkWidget *new_prisoner;
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/* Fetch the currently selected list item which
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* will be our next prisoner ;)
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*/
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dlist = GTK_LIST (gtklist)->selection;
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if (dlist)
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new_prisoner = GTK_WIDGET (dlist->data);
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else
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new_prisoner = NULL;
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/* Look for already imprisoned list items, we
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* will put them back into the list.
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* Remember to free the doubly linked list that
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* gtk_container_children() returns
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*/
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dlist = gtk_container_children (GTK_CONTAINER (frame));
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free_list = dlist;
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while (dlist) {
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GtkWidget *list_item;
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list_item = dlist->data;
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gtk_widget_reparent (list_item, gtklist);
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dlist = dlist->next;
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}
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g_list_free (free_list);
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/* If we have a new prisoner, remove him from the
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* List and put him into the frame "Prison".
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* We need to unselect the item first.
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*/
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if (new_prisoner) {
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GList static_dlist;
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static_dlist.data = new_prisoner;
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static_dlist.next = NULL;
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static_dlist.prev = NULL;
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gtk_list_unselect_child (GTK_LIST (gtklist),
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new_prisoner);
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gtk_widget_reparent (new_prisoner, frame);
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}
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}
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}
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/* This is the signal handler that gets called if List
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* emits the "selection_changed" signal
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*/
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void sigh_print_selection( GtkWidget *gtklist,
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gpointer func_data )
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{
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GList *dlist;
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/* Fetch the doubly linked list of selected items
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* of the List, remember to treat this as read-only!
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*/
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dlist = GTK_LIST (gtklist)->selection;
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/* If there are no selected items there is nothing more
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* to do than just telling the user so
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*/
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if (!dlist) {
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g_print ("Selection cleared\n");
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return;
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}
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/* Ok, we got a selection and so we print it
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*/
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g_print ("The selection is a ");
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/* Get the list item from the doubly linked list
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* and then query the data associated with list_item_data_key.
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* We then just print it */
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while (dlist) {
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const gchar *item_data_string;
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item_data_string = g_object_get_data (G_OBJECT (dlist->data),
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list_item_data_key);
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g_print("%s ", item_data_string);
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dlist = dlist->next;
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}
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g_print ("\n");
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}
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