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/* Benchmark/Themes
*
* This demo switches themes like a maniac, like some of you.
*/
#include <gtk/gtk.h>
static guint tick_cb;
static gint64
guess_refresh_interval (GdkFrameClock *frame_clock)
{
gint64 interval;
gint64 i;
interval = G_MAXINT64;
for (i = gdk_frame_clock_get_history_start (frame_clock);
i < gdk_frame_clock_get_frame_counter (frame_clock);
i++)
{
GdkFrameTimings *t, *before;
gint64 ts, before_ts;
t = gdk_frame_clock_get_timings (frame_clock, i);
before = gdk_frame_clock_get_timings (frame_clock, i - 1);
if (t == NULL || before == NULL)
continue;
ts = gdk_frame_timings_get_frame_time (t);
before_ts = gdk_frame_timings_get_frame_time (before);
if (ts == 0 || before_ts == 0)
continue;
interval = MIN (interval, ts - before_ts);
}
if (interval == G_MAXINT64)
return 0;
return interval;
}
static double
frame_clock_get_fps (GdkFrameClock *frame_clock)
{
GdkFrameTimings *start, *end;
gint64 start_counter, end_counter;
gint64 start_timestamp, end_timestamp;
gint64 interval;
start_counter = gdk_frame_clock_get_history_start (frame_clock);
end_counter = gdk_frame_clock_get_frame_counter (frame_clock);
start = gdk_frame_clock_get_timings (frame_clock, start_counter);
for (end = gdk_frame_clock_get_timings (frame_clock, end_counter);
end_counter > start_counter && end != NULL && !gdk_frame_timings_get_complete (end);
end = gdk_frame_clock_get_timings (frame_clock, end_counter))
end_counter--;
if (end_counter - start_counter < 4)
return 0.0;
start_timestamp = gdk_frame_timings_get_presentation_time (start);
end_timestamp = gdk_frame_timings_get_presentation_time (end);
if (start_timestamp == 0 || end_timestamp == 0)
{
start_timestamp = gdk_frame_timings_get_frame_time (start);
end_timestamp = gdk_frame_timings_get_frame_time (end);
}
interval = gdk_frame_timings_get_refresh_interval (end);
if (interval == 0)
{
interval = guess_refresh_interval (frame_clock);
if (interval == 0)
return 0.0;
}
return ((double) end_counter - start_counter) * G_USEC_PER_SEC / (end_timestamp - start_timestamp);
}
typedef struct {
const char *name;
gboolean dark;
} Theme;
static Theme themes[] = {
{ "Adwaita", FALSE },
{ "Adwaita", TRUE },
{ "HighContrast", FALSE },
{ "HighContrastInverse", FALSE }
};
static int theme;
static gboolean
change_theme (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer data)
{
GtkWidget *label = data;
Theme next = themes[theme++ % G_N_ELEMENTS (themes)];
char *name;
g_object_set (gtk_settings_get_default (),
"gtk-theme-name", next.name,
"gtk-application-prefer-dark-theme", next.dark,
NULL);
name = g_strconcat (next.name, next.dark ? " (dark)" : NULL, NULL);
gtk_window_set_title (GTK_WINDOW (widget), name);
g_free (name);
if (frame_clock)
{
char *fps;
fps = g_strdup_printf ("%.2f fps", frame_clock_get_fps (frame_clock));
gtk_label_set_label (GTK_LABEL (label), fps);
g_free (fps);
}
else
gtk_label_set_label (GTK_LABEL (label), "");
return G_SOURCE_CONTINUE;
}
static void
clicked (GtkGestureClick *gesture,
int n_press,
double x,
double y,
gpointer data)
{
GtkWidget *window;
GdkEvent *event;
GdkModifierType state;
window = gtk_widget_get_ancestor (gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)), GTK_TYPE_WINDOW);
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), NULL);
state = gdk_event_get_modifier_state (event);
if (state & GDK_CONTROL_MASK)
{
if (tick_cb)
{
gtk_widget_remove_tick_callback (window, tick_cb);
tick_cb = 0;
}
change_theme (window, NULL, data);
}
else
{
if (tick_cb)
{
gtk_widget_remove_tick_callback (window, tick_cb);
tick_cb = 0;
}
else
{
tick_cb = gtk_widget_add_tick_callback (window, change_theme, data, NULL);
}
}
}
static void
toggle_cycle (GObject *button,
GParamSpec *pspec,
gpointer data)
{
gboolean active;
GtkWidget *window;
g_object_get (button, "active", &active, NULL);
window = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_WINDOW);
if (active && !tick_cb)
{
tick_cb = gtk_widget_add_tick_callback (window, change_theme, data, NULL);
}
else if (!active && tick_cb)
{
gtk_widget_remove_tick_callback (window, tick_cb);
tick_cb = 0;
}
}
GtkWidget *
do_themes (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkBuilder *builder;
GtkWidget *header;
GtkWidget *button;
GtkWidget *label;
GtkGesture *gesture;
builder = gtk_builder_new_from_resource ("/themes/themes.ui");
window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
header = GTK_WIDGET (gtk_builder_get_object (builder, "header"));
label = GTK_WIDGET (gtk_builder_get_object (builder, "fps"));
gesture = gtk_gesture_click_new ();
g_signal_connect (gesture, "pressed", G_CALLBACK (clicked), label);
gtk_widget_add_controller (header, GTK_EVENT_CONTROLLER (gesture));
button = GTK_WIDGET (gtk_builder_get_object (builder, "toggle"));
g_signal_connect (button, "notify::active", G_CALLBACK (toggle_cycle), label);
gtk_widget_realize (window);
g_object_unref (builder);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_window_destroy (GTK_WINDOW (window));
return window;
}
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