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ec3b1a7b90
Instead of using our own homegrown alpha functions, we should
use the easing functions also shared by other animation frameworks,
like jQuery and Tween, in the interests of code portability.
The easing functions have been defined by Robert Penner and
are divided into three categories:
In Out InOut
Each category has a particular curve:
Quadratic
Cubic
Quartic
Quintic
Sinusoidal
Exponential
Circular
In addition, there are "physical" curves:
Elastic
Back (overshooting cubic)
Bounce (exponentially decaying parabolic)
Finally, the Linear curve is also provided as a reference.
The functions are private, and are meant to be used only
through their logical id as provided by the AnimationMode
enumeration.
The tests should be updated as well to match the new
easing functions.
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
#include <stdlib.h>
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#include <gmodule.h>
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#include <clutter/clutter.h>
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static gboolean is_expanded = FALSE;
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static void
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on_animation_complete (ClutterAnimation *animation,
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ClutterActor *actor)
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{
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is_expanded = !is_expanded;
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g_print ("Animation complete\n");
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clutter_actor_set_reactive (actor, TRUE);
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}
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static gboolean
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on_button_press (ClutterActor *actor,
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ClutterButtonEvent *event,
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gpointer dummy)
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{
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ClutterAnimation *animation;
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gint old_x, old_y, new_x, new_y;
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guint old_width, old_height, new_width, new_height;
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gdouble new_angle;
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ClutterVertex vertex = { 0, };
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ClutterColor new_color = { 0, };
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clutter_actor_get_position (actor, &old_x, &old_y);
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clutter_actor_get_size (actor, &old_width, &old_height);
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/* determine the final state of the animation depending on
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* the state of the actor
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*/
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if (!is_expanded)
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{
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new_x = old_x - 100;
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new_y = old_y - 100;
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new_width = old_width + 200;
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new_height = old_height + 200;
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new_angle = 360.0;
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new_color.red = 0xdd;
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new_color.green = 0x44;
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new_color.blue = 0xdd;
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new_color.alpha = 0xff;
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}
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else
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{
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new_x = old_x + 100;
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new_y = old_y + 100;
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new_width = old_width - 200;
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new_height = old_height - 200;
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new_angle = 0.0;
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new_color.red = 0x44;
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new_color.green = 0xdd;
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new_color.blue = 0x44;
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new_color.alpha = 0x88;
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}
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vertex.x = CLUTTER_UNITS_FROM_FLOAT ((float) new_width / 2);
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vertex.y = CLUTTER_UNITS_FROM_FLOAT ((float) new_height / 2);
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animation =
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clutter_actor_animate (actor, CLUTTER_EASE_IN_EXPO, 2000,
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"x", new_x,
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"y", new_y,
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"width", new_width,
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"height", new_height,
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"color", &new_color,
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"rotation-angle-z", new_angle,
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"fixed::rotation-center-z", &vertex,
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"fixed::reactive", FALSE,
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NULL);
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g_signal_connect (animation,
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"completed", G_CALLBACK (on_animation_complete),
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actor);
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return TRUE;
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}
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G_MODULE_EXPORT int
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test_animation_main (int argc, char *argv[])
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{
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ClutterActor *stage, *rect;
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ClutterColor stage_color = { 0x66, 0x66, 0xdd, 0xff };
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ClutterColor rect_color = { 0x44, 0xdd, 0x44, 0xff };
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clutter_init (&argc, &argv);
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stage = clutter_stage_get_default ();
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clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
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rect = clutter_rectangle_new_with_color (&rect_color);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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clutter_actor_set_size (rect, 50, 50);
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clutter_actor_set_anchor_point (rect, 25, 25);
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clutter_actor_set_position (rect,
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clutter_actor_get_width (stage) / 2,
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clutter_actor_get_height (stage) / 2);
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clutter_actor_set_opacity (rect, 0x88);
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clutter_actor_set_reactive (rect, TRUE);
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g_signal_connect (rect,
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"button-press-event", G_CALLBACK (on_button_press),
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NULL);
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clutter_actor_show (stage);
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clutter_main ();
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return EXIT_SUCCESS;
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}
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