mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-19 01:40:10 +00:00
285 lines
8.6 KiB
C
285 lines
8.6 KiB
C
/* This file extracted from the GTK tutorial. */
|
||
|
||
/* list.c */
|
||
|
||
/* include the gtk+ header files
|
||
* include stdio.h, we need that for the printf() function
|
||
*/
|
||
#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 GtkList 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");
|
||
gtk_signal_connect(GTK_OBJECT(window),
|
||
"destroy",
|
||
GTK_SIGNAL_FUNC(gtk_main_quit),
|
||
NULL);
|
||
|
||
|
||
/* inside the window we need a box to arrange the widgets
|
||
* vertically */
|
||
vbox=gtk_vbox_new(FALSE, 5);
|
||
gtk_container_border_width(GTK_CONTAINER(vbox), 5);
|
||
gtk_container_add(GTK_CONTAINER(window), vbox);
|
||
gtk_widget_show(vbox);
|
||
|
||
/* this is the scolled window to put the GtkList widget inside */
|
||
scrolled_window=gtk_scrolled_window_new(NULL, NULL);
|
||
gtk_widget_set_usize(scrolled_window, 250, 150);
|
||
gtk_container_add(GTK_CONTAINER(vbox), scrolled_window);
|
||
gtk_widget_show(scrolled_window);
|
||
|
||
/* create the GtkList widget
|
||
* connect the sigh_print_selection() signal handler
|
||
* function to the "selection_changed" signal of the GtkList
|
||
* to print out the selected items each time the selection
|
||
* has changed */
|
||
gtklist=gtk_list_new();
|
||
gtk_container_add(GTK_CONTAINER(scrolled_window), gtklist);
|
||
gtk_widget_show(gtklist);
|
||
gtk_signal_connect(GTK_OBJECT(gtklist),
|
||
"selection_changed",
|
||
GTK_SIGNAL_FUNC(sigh_print_selection),
|
||
NULL);
|
||
|
||
/* we create a "Prison" to put a list item in ;)
|
||
*/
|
||
frame=gtk_frame_new("Prison");
|
||
gtk_widget_set_usize(frame, 200, 50);
|
||
gtk_container_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 GtkList
|
||
* wich will handle the "arresting" of list items
|
||
*/
|
||
gtk_signal_connect(GTK_OBJECT(gtklist),
|
||
"button_release_event",
|
||
GTK_SIGNAL_FUNC(sigh_button_event),
|
||
frame);
|
||
|
||
/* create a separator
|
||
*/
|
||
separator=gtk_hseparator_new();
|
||
gtk_container_add(GTK_CONTAINER(vbox), separator);
|
||
gtk_widget_show(separator);
|
||
|
||
/* finaly create a button and connect it<69>s "clicked" signal
|
||
* to the destroyment of the window
|
||
*/
|
||
button=gtk_button_new_with_label("Close");
|
||
gtk_container_add(GTK_CONTAINER(vbox), button);
|
||
gtk_widget_show(button);
|
||
gtk_signal_connect_object(GTK_OBJECT(button),
|
||
"clicked",
|
||
GTK_SIGNAL_FUNC(gtk_widget_destroy),
|
||
GTK_OBJECT(window));
|
||
|
||
|
||
/* now we create 5 list items, each having it<69>s own
|
||
* label and add them to the GtkList 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);
|
||
gtk_object_set_data(GTK_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<61>t query the text string from the label because
|
||
* we don<6F>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);
|
||
gtk_object_set_data(GTK_OBJECT(list_item),
|
||
list_item_data_key,
|
||
"ListItem with integrated Label");
|
||
}
|
||
gtk_list_append_items(GTK_LIST(gtklist), dlist);
|
||
|
||
/* finaly we want to see the window, don<6F>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 GtkList
|
||
*/
|
||
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 prisoned 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
|
||
* GtkList and put him into the frame "Prison"
|
||
* we need to unselect the item before
|
||
*/
|
||
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 GtkList
|
||
* 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 GtkList, 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) {
|
||
GtkObject *list_item;
|
||
gchar *item_data_string;
|
||
|
||
list_item=GTK_OBJECT(dlist->data);
|
||
item_data_string=gtk_object_get_data(list_item,
|
||
list_item_data_key);
|
||
g_print("%s ", item_data_string);
|
||
|
||
dlist=dlist->next;
|
||
}
|
||
g_print("\n");
|
||
}
|