gtk/demos/gtk-demo/overlay.c
Matthias Clasen 609e04ddcf gtk-demo: Cosmetic changes
Clean up the code of many examples in minor ways, fix some memory
leaks, and avoid the use of dialogs where a regular toplevel works
just as well.
2015-06-28 17:41:35 -04:00

86 lines
2.5 KiB
C

/* Overlay
*
* Shows widgets in static positions over a main widget.
*
* The overlayed widgets can be interactive controls such
* as the entry in this example, or just decorative, like
* the big blue label.
*/
#include <gtk/gtk.h>
static void
do_number (GtkButton *button, GtkEntry *entry)
{
gtk_entry_set_text (entry, gtk_button_get_label (button));
}
GtkWidget *
do_overlay (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkWidget *overlay;
GtkWidget *grid;
GtkWidget *button;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *entry;
int i, j;
char *text;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 500, 510);
gtk_window_set_title (GTK_WINDOW (window), "Overlay");
overlay = gtk_overlay_new ();
grid = gtk_grid_new ();
gtk_container_add (GTK_CONTAINER (overlay), grid);
entry = gtk_entry_new ();
for (j = 0; j < 5; j++)
{
for (i = 0; i < 5; i++)
{
text = g_strdup_printf ("%d", 5*j + i);
button = gtk_button_new_with_label (text);
g_free (text);
gtk_widget_set_hexpand (button, TRUE);
gtk_widget_set_vexpand (button, TRUE);
g_signal_connect (button, "clicked", G_CALLBACK (do_number), entry);
gtk_grid_attach (GTK_GRID (grid), button, i, j, 1, 1);
}
}
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), vbox);
gtk_overlay_set_overlay_pass_through (GTK_OVERLAY (overlay), vbox, TRUE);
gtk_widget_set_halign (vbox, GTK_ALIGN_CENTER);
gtk_widget_set_valign (vbox, GTK_ALIGN_CENTER);
label = gtk_label_new ("<span foreground='blue' weight='ultrabold' font='40'>Numbers</span>");
gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 8);
gtk_entry_set_placeholder_text (GTK_ENTRY (entry), "Your Lucky Number");
gtk_box_pack_start (GTK_BOX (vbox), entry, FALSE, FALSE, 8);
gtk_container_add (GTK_CONTAINER (window), overlay);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
gtk_widget_show_all (overlay);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_widget_destroy (window);
return window;
}