gtk/demos/gtk-demo/overlay.c
Matthias Clasen d732c869c2 gtk-demo: Add keywords to demos
Add the names of the main widgets as keywords to
our demos, but also things like "game". This helps
finding relevant demos in our growing list. You
can now for example type "label", and find the
"error states" and "links" demos showing GtkLabel
features.
2020-09-13 15:00:14 -04:00

93 lines
2.8 KiB
C

/* 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;
}