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/* Overlay/Interactive Overlay
* #Keywords: GtkOverlay
*
* Shows widgets in static positions over a main widget.
*
* The overlaid 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_editable_set_text (GTK_EDITABLE (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_set_default_size (GTK_WINDOW (window), 500, 510);
gtk_window_set_title (GTK_WINDOW (window), "Interactive Overlay");
overlay = gtk_overlay_new ();
grid = gtk_grid_new ();
gtk_overlay_set_child (GTK_OVERLAY (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_widget_set_can_target (vbox, FALSE);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), vbox);
gtk_widget_set_halign (vbox, GTK_ALIGN_CENTER);
gtk_widget_set_valign (vbox, GTK_ALIGN_START);
label = gtk_label_new ("<span foreground='blue' weight='ultrabold' font='40'>Numbers</span>");
gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
gtk_widget_set_can_target (label, FALSE);
gtk_widget_set_margin_top (label, 8);
gtk_widget_set_margin_bottom (label, 8);
gtk_box_append (GTK_BOX (vbox), label);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), vbox);
gtk_widget_set_halign (vbox, GTK_ALIGN_CENTER);
gtk_widget_set_valign (vbox, GTK_ALIGN_CENTER);
gtk_entry_set_placeholder_text (GTK_ENTRY (entry), "Your Lucky Number");
gtk_widget_set_margin_top (entry, 8);
gtk_widget_set_margin_bottom (entry, 8);
gtk_box_append (GTK_BOX (vbox), entry);
gtk_window_set_child (GTK_WINDOW (window), overlay);
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_window_destroy (GTK_WINDOW (window));
return window;
}
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