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AlignConstraint is a simple constraint that keeps an actor's position aligned to the width or height of another actor, multiplied by an alignment factor.
127 lines
4.4 KiB
C
127 lines
4.4 KiB
C
#include <stdlib.h>
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#include <gmodule.h>
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#include <clutter/clutter.h>
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#define H_PADDING 32
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static ClutterActor *center_rect = NULL;
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static ClutterActor *left_rect = NULL;
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static ClutterActor *right_rect = NULL;
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static gboolean is_expanded = FALSE;
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static gboolean
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on_button_release (ClutterActor *actor,
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ClutterEvent *event,
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gpointer data G_GNUC_UNUSED)
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{
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if (!is_expanded)
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{
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gfloat left_offset = (clutter_actor_get_width (left_rect) + H_PADDING)
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* -1.0f;
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gfloat right_offset = clutter_actor_get_width (right_rect) + H_PADDING;
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clutter_actor_animate (left_rect, CLUTTER_EASE_OUT_CUBIC, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", left_offset,
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NULL);
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clutter_actor_animate (right_rect, CLUTTER_EASE_OUT_CUBIC, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", right_offset,
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NULL);
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}
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else
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{
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clutter_actor_animate (left_rect, CLUTTER_EASE_OUT_CUBIC, 500,
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"opacity", 0,
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"@constraints.x-bind.offset", 0.0f,
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NULL);
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clutter_actor_animate (right_rect, CLUTTER_EASE_OUT_CUBIC, 500,
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"opacity", 0,
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"@constraints.x-bind.offset", 0.0f,
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NULL);
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}
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is_expanded = !is_expanded;
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return TRUE;
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}
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G_MODULE_EXPORT int
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test_constraints_main (int argc, char *argv[])
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{
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ClutterActor *stage, *rect;
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ClutterColor rect_color;
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ClutterConstraint *constraint;
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clutter_init (&argc, &argv);
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stage = clutter_stage_new ();
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g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
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clutter_stage_set_title (CLUTTER_STAGE (stage), "Constraints");
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clutter_actor_set_size (stage, 800, 600);
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/* main rect */
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clutter_color_from_string (&rect_color, "#73d216ff");
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rect = clutter_rectangle_new ();
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g_signal_connect (rect, "button-release-event",
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G_CALLBACK (on_button_release),
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NULL);
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clutter_rectangle_set_color (CLUTTER_RECTANGLE (rect), &rect_color);
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clutter_actor_set_size (rect, 256, 256);
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clutter_actor_set_reactive (rect, TRUE);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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constraint = clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "x-align");
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clutter_actor_add_constraint (rect, constraint);
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constraint = clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "y-align");
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clutter_actor_add_constraint (rect, constraint);
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center_rect = rect;
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/* left rectangle */
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clutter_color_from_string (&rect_color, "#cc0000ff");
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rect = clutter_rectangle_new ();
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clutter_rectangle_set_color (CLUTTER_RECTANGLE (rect), &rect_color);
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clutter_actor_set_size (rect, 256, 256);
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clutter_actor_set_opacity (rect, 0);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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constraint = clutter_bind_constraint_new (center_rect, CLUTTER_BIND_X_AXIS, 0.0f);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "x-bind");
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clutter_actor_add_constraint (rect, constraint);
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constraint = clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "y-align");
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clutter_actor_add_constraint (rect, constraint);
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left_rect = rect;
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/* right rectangle */
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clutter_color_from_string (&rect_color, "#3465a4ff");
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rect = clutter_rectangle_new ();
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clutter_rectangle_set_color (CLUTTER_RECTANGLE (rect), &rect_color);
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clutter_actor_set_size (rect, 256, 256);
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clutter_actor_set_opacity (rect, 0);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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constraint = clutter_bind_constraint_new (center_rect, CLUTTER_BIND_X_AXIS, 0.0f);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "x-bind");
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clutter_actor_add_constraint (rect, constraint);
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constraint = clutter_align_constraint_new (stage, CLUTTER_ALIGN_Y_AXIS, 0.5);
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clutter_actor_meta_set_name (CLUTTER_ACTOR_META (constraint), "y-align");
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clutter_actor_add_constraint (rect, constraint);
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right_rect = rect;
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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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