gtk2/demos/gtk-demo/revealer.c

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/* Revealer
*
* GtkRevealer is a container that animates showing and hiding
* of its sole child with nice transitions.
*/
#include <gtk/gtk.h>
static GtkBuilder *builder;
static gint count = 0;
static void
change_direction (GtkRevealer *revealer)
{
gboolean revealed;
revealed = gtk_revealer_get_child_revealed (revealer);
gtk_revealer_set_reveal_child (revealer, !revealed);
}
static gboolean
reveal_one (gpointer data)
{
gchar *name;
GtkRevealer *revealer;
name = g_strdup_printf ("revealer%d", count);
revealer = (GtkRevealer *)gtk_builder_get_object (builder, name);
gtk_revealer_set_reveal_child (revealer, TRUE);
g_signal_connect (revealer, "notify::child-revealed",
G_CALLBACK (change_direction), NULL);
count++;
return count < 9;
}
static guint timeout = 0;
static void
response_cb (GtkWidget *dialog,
gint response_id,
gpointer data)
{
if (timeout != 0)
{
g_source_remove (timeout);
timeout = 0;
}
gtk_widget_destroy (dialog);
}
GtkWidget *
do_revealer (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
GError *err = NULL;
if (!window)
{
builder = gtk_builder_new ();
gtk_builder_add_from_resource (builder, "/revealer/revealer.ui", &err);
if (err)
{
g_error ("ERROR: %s\n", err->message);
return NULL;
}
gtk_builder_connect_signals (builder, NULL);
window = GTK_WIDGET (gtk_builder_get_object (builder, "dialog1"));
gtk_window_set_screen (GTK_WINDOW (window),
gtk_widget_get_screen (do_widget));
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_widget_destroyed), &window);
g_signal_connect (window, "response", G_CALLBACK (response_cb), NULL);
}
if (!gtk_widget_get_visible (window))
{
count = 0;
timeout = g_timeout_add (690, reveal_one, NULL);
gtk_widget_show_all (window);
}
else
{
gtk_widget_destroy (window);
window = NULL;
}
return window;
}