1 #include <gtk/gtk.h>
2
3
4
5 /*Callback function in which pushes an item onto the statusbar*/
6 static void
push_item(GtkWidget * widget,gpointer data)7 push_item (GtkWidget *widget,
8 gpointer data)
9 {
10 GtkWidget *status_bar = data;
11
12 /*Create a context id, which is used to uniquely identify
13 *the source of a message*/
14 guint context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (status_bar),
15 "Statusbar example");
16
17 /*Count is used to keep track of the amount of items
18 the user is pushing/popping*/
19 static int count = 1;
20 char hold_output[20];
21
22 /*This is a safer form of the standard sprintf () function. The output is
23 guaranteed in this case to not exceed 20 characters, and the result is stored
24 into the 'hold_output' variable*/
25 g_snprintf (hold_output, 20, "Item %d", count++);
26 gtk_statusbar_push (GTK_STATUSBAR (status_bar),
27 context_id,
28 hold_output);
29 }
30
31
32
33 /*Callback function that is used to pop an item off the statusbar*/
34 static void
pop_item(GtkWidget * widget,gpointer data)35 pop_item (GtkWidget *widget,
36 gpointer data )
37 {
38 GtkWidget *status_bar = data;
39 guint context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (status_bar),
40 "Statusbar example");
41
42 gtk_statusbar_pop (GTK_STATUSBAR (status_bar), context_id);
43 }
44
45
46
47 static void
activate(GtkApplication * app,gpointer user_data)48 activate (GtkApplication *app,
49 gpointer user_data)
50 {
51 GtkWidget *grid;
52 GtkWidget *window;
53 GtkWidget *status_bar;
54 GtkWidget *pop_button;
55 GtkWidget *push_button;
56
57 /*Create a window with a title, border width, and a default size**/
58 window = gtk_application_window_new (app);
59 gtk_window_set_default_size (GTK_WINDOW (window), 220, 100);
60 gtk_window_set_title (GTK_WINDOW (window), "Statusbar Example");
61 gtk_container_set_border_width (GTK_CONTAINER(window), 10);
62
63 /*Create the status bar, which is held in the global variable*/
64 status_bar = gtk_statusbar_new ();
65
66 /*Create the buttons with labels*/
67 push_button = gtk_button_new_with_label ("push item");
68 pop_button = gtk_button_new_with_label ("pop last item");
69
70 /*Create the grid, and attach the buttons/statusbar accordingly*/
71 grid = gtk_grid_new ();
72 gtk_grid_attach (GTK_GRID (grid), push_button, 0,1,1,1);
73 gtk_grid_attach (GTK_GRID (grid), pop_button, 0,2,1,1);
74 gtk_grid_attach (GTK_GRID (grid), status_bar, 0,3,1,1);
75
76 /*Connecting the clicked signals to the corresponding callback functions*/
77 g_signal_connect (GTK_BUTTON (push_button), "clicked",
78 G_CALLBACK (push_item), status_bar);
79 g_signal_connect (GTK_BUTTON (pop_button), "clicked",
80 G_CALLBACK (pop_item), status_bar);
81
82 /*Attach the grid holding the child widgets onto the window, and show all*/
83 gtk_container_add (GTK_CONTAINER (window), grid);
84 gtk_widget_show_all (window);
85 }
86
87
88
89 int
main(int argc,char ** argv)90 main (int argc, char **argv)
91 {
92 GtkApplication *app;
93 int status;
94
95 app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
96 g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
97 status = g_application_run (G_APPLICATION (app), argc, argv);
98 g_object_unref (app);
99
100 return status;
101 }
102