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#include <stdlib.h>
#include <clutter/clutter.h>
/* all the easing modes provided by Clutter */
static const struct {
const gchar *name;
ClutterAnimationMode mode;
} easing_modes[] = {
{ "linear", CLUTTER_LINEAR },
{ "easeInQuad", CLUTTER_EASE_IN_QUAD },
{ "easeOutQuad", CLUTTER_EASE_OUT_QUAD },
{ "easeInOutQuad", CLUTTER_EASE_IN_OUT_QUAD },
{ "easeInCubic", CLUTTER_EASE_IN_CUBIC },
{ "easeOutCubic", CLUTTER_EASE_OUT_CUBIC },
{ "easeInOutCubic", CLUTTER_EASE_IN_OUT_CUBIC },
{ "easeInQuart", CLUTTER_EASE_IN_QUART },
{ "easeOutQuart", CLUTTER_EASE_OUT_QUART },
{ "easeInOutQuart", CLUTTER_EASE_IN_OUT_QUART },
{ "easeInQuint", CLUTTER_EASE_IN_QUINT },
{ "easeOutQuint", CLUTTER_EASE_OUT_QUINT },
{ "easeInOutQuint", CLUTTER_EASE_IN_OUT_QUINT },
{ "easeInSine", CLUTTER_EASE_IN_SINE },
{ "easeOutSine", CLUTTER_EASE_OUT_SINE },
{ "easeInOutSine", CLUTTER_EASE_IN_OUT_SINE },
{ "easeInExpo", CLUTTER_EASE_IN_EXPO },
{ "easeOutExpo", CLUTTER_EASE_OUT_EXPO },
{ "easeInOutExpo", CLUTTER_EASE_IN_OUT_EXPO },
{ "easeInCirc", CLUTTER_EASE_IN_CIRC },
{ "easeOutCirc", CLUTTER_EASE_OUT_CIRC },
{ "easeInOutCirc", CLUTTER_EASE_IN_OUT_CIRC },
{ "easeInElastic", CLUTTER_EASE_IN_ELASTIC },
{ "easeOutElastic", CLUTTER_EASE_OUT_ELASTIC },
{ "easeInOutElastic", CLUTTER_EASE_IN_OUT_ELASTIC },
{ "easeInBack", CLUTTER_EASE_IN_BACK },
{ "easeOutBack", CLUTTER_EASE_OUT_BACK },
{ "easeInOutBack", CLUTTER_EASE_IN_OUT_BACK },
{ "easeInBounce", CLUTTER_EASE_IN_BOUNCE },
{ "easeOutBounce", CLUTTER_EASE_OUT_BOUNCE },
{ "easeInOutBounce", CLUTTER_EASE_IN_OUT_BOUNCE },
{ "stepStart", CLUTTER_STEP_START },
{ "stepEnd", CLUTTER_STEP_END },
{ "ease", CLUTTER_EASE },
{ "easeIn", CLUTTER_EASE_IN },
{ "easeOut", CLUTTER_EASE_OUT },
{ "easeInOut", CLUTTER_EASE_IN_OUT },
};
#define HELP_TEXT "<b>Easing mode: %s (%d of %d)</b>\n" \
"Left click to tween\n" \
"Middle click to jump\n" \
"Right click to change the easing mode"
static const gint n_easing_modes = G_N_ELEMENTS (easing_modes);
static gint current_mode = 0;
static gint duration = 1;
static ClutterActor *main_stage = NULL;
static ClutterActor *easing_mode_label = NULL;
static gboolean
on_button_press (ClutterActor *actor,
ClutterButtonEvent *event,
ClutterActor *rectangle)
{
if (event->button == CLUTTER_BUTTON_SECONDARY)
{
gchar *text;
/* cycle through the various easing modes */
current_mode = (current_mode + 1 < n_easing_modes)
? current_mode + 1
: 0;
/* update the text of the label */
text = g_strdup_printf (HELP_TEXT,
easing_modes[current_mode].name,
current_mode + 1,
n_easing_modes);
clutter_text_set_markup (CLUTTER_TEXT (easing_mode_label), text);
g_free (text);
}
else if (event->button == CLUTTER_BUTTON_MIDDLE)
{
clutter_actor_set_position (rectangle, event->x, event->y);
}
else if (event->button == CLUTTER_BUTTON_PRIMARY)
{
ClutterAnimationMode cur_mode;
cur_mode = easing_modes[current_mode].mode;
clutter_actor_save_easing_state (rectangle);
/* tween the actor using the current easing mode */
clutter_actor_set_easing_mode (rectangle, cur_mode);
clutter_actor_set_easing_duration (rectangle, duration * 1000);
clutter_actor_set_position (rectangle, event->x, event->y);
clutter_actor_restore_easing_state (rectangle);
}
return CLUTTER_EVENT_STOP;
}
static gboolean
draw_bouncer (ClutterCanvas *canvas,
cairo_t *cr,
int width,
int height)
{
const ClutterColor *bouncer_color;
cairo_pattern_t *pattern;
float radius;
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
radius = MAX (width, height);
cairo_arc (cr, radius / 2, radius / 2, radius / 2, 0.0, 2.0 * G_PI);
bouncer_color = CLUTTER_COLOR_DarkScarletRed;
pattern = cairo_pattern_create_radial (radius / 2, radius / 2, 0,
radius, radius, radius);
cairo_pattern_add_color_stop_rgba (pattern,
0,
bouncer_color->red / 255.0,
bouncer_color->green / 255.0,
bouncer_color->blue / 255.0,
bouncer_color->alpha / 255.0);
cairo_pattern_add_color_stop_rgba (pattern,
0.85,
bouncer_color->red / 255.0,
bouncer_color->green / 255.0,
bouncer_color->blue / 255.0,
0.25);
cairo_set_source (cr, pattern);
cairo_fill_preserve (cr);
cairo_pattern_destroy (pattern);
return TRUE;
}
static ClutterActor *
make_bouncer (gfloat width,
gfloat height)
{
ClutterActor *retval;
ClutterContent *canvas;
retval = clutter_actor_new ();
canvas = clutter_canvas_new ();
g_signal_connect (canvas, "draw", G_CALLBACK (draw_bouncer), NULL);
clutter_canvas_set_size (CLUTTER_CANVAS (canvas), width, height);
clutter_actor_set_name (retval, "bouncer");
clutter_actor_set_size (retval, width, height);
clutter_actor_set_pivot_point (retval, 0.5f, 0.5f);
clutter_actor_set_translation (retval, width / -2.f, height / -2.f, 0.f);
clutter_actor_set_reactive (retval, TRUE);
clutter_actor_set_content (retval, canvas);
g_object_unref (canvas);
return retval;
}
static GOptionEntry test_easing_entries[] = {
{
"duration", 'd',
0,
G_OPTION_ARG_INT, &duration,
"Duration of the animation",
"SECONDS"
},
{ NULL }
};
int
main (int argc, char *argv[])
{
ClutterActor *stage, *rect, *label;
gchar *text;
gfloat stage_width, stage_height;
GError *error = NULL;
if (clutter_init_with_args (&argc, &argv,
NULL,
test_easing_entries,
NULL,
&error) != CLUTTER_INIT_SUCCESS)
return 1;
stage = clutter_stage_new ();
clutter_stage_set_title (CLUTTER_STAGE (stage), "Easing Modes");
clutter_actor_set_background_color (stage, CLUTTER_COLOR_LightSkyBlue);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
main_stage = stage;
clutter_actor_get_size (stage, &stage_width, &stage_height);
/* create the actor that we want to tween */
rect = make_bouncer (50, 50);
clutter_actor_add_child (stage, rect);
clutter_actor_set_position (rect, stage_width / 2, stage_height / 2);
text = g_strdup_printf (HELP_TEXT,
easing_modes[current_mode].name,
current_mode + 1,
n_easing_modes);
label = clutter_text_new ();
clutter_actor_add_child (stage, label);
clutter_text_set_markup (CLUTTER_TEXT (label), text);
clutter_text_set_line_alignment (CLUTTER_TEXT (label), PANGO_ALIGN_RIGHT);
clutter_actor_add_constraint (label, clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.95));
clutter_actor_add_constraint (label, clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.95));
easing_mode_label = label;
g_free (text);
g_signal_connect (stage,
"button-press-event", G_CALLBACK (on_button_press),
rect);
clutter_actor_show (stage);
clutter_main ();
return EXIT_SUCCESS;
}
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