forked from AuroraMiddleware/gtk
ee3d137660
Sat Nov 13 22:30:29 GMT 1999 Tony Gale <gale@gtk.org>
* docs/gtkfaq.sgml: threads example from Erik Mouw.
New question on GtkLabel background colors.
* docs/gtk_tut.sgml:
- Correct the example code callback
function definitions.
- Update the gtkdial example code, from Frans van Schaik.
- Update setselection.c to current API.
* examples/Makefile examples/*/*.c: Update to code
listed in tutorial.
279 lines
8.4 KiB
C
279 lines
8.4 KiB
C
/* example-start list list.c */
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/* Include the GTK header files
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* Include stdio.h, we need that for the printf() function
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*/
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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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gtk_signal_connect(GTK_OBJECT(window),
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"destroy",
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GTK_SIGNAL_FUNC(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_usize(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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gtk_signal_connect(GTK_OBJECT(gtklist),
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"selection_changed",
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GTK_SIGNAL_FUNC(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_usize(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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gtk_signal_connect(GTK_OBJECT(gtklist),
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"button_release_event",
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GTK_SIGNAL_FUNC(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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gtk_signal_connect_object(GTK_OBJECT(button),
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"clicked",
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GTK_SIGNAL_FUNC(gtk_widget_destroy),
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GTK_OBJECT(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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gtk_object_set_data(GTK_OBJECT(list_item),
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list_item_data_key,
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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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gtk_object_set_data(GTK_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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GtkObject *list_item;
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gchar *item_data_string;
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list_item=GTK_OBJECT(dlist->data);
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item_data_string=gtk_object_get_data(list_item,
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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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/* example-end */
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