test-constraints: Clean up the example
Add some comments to detail what are we doing and why.
This commit is contained in:
Emmanuele Bassi
parent
0d6208f36e
commit
bce27e45b0
@ -22,6 +22,11 @@ static const gchar *colors[N_RECTS] = {
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"#729fcf", "#3465a4", "#204a87",
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"#ef2929", "#cc0000", "#a40000"
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};
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static const gchar *names[N_RECTS] = {
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"North West", "North", "North East",
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"West", "Center", "East",
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"South West", "South", "South East"
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};
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static const gchar *desaturare_glsl_shader =
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"uniform sampler2D tex;\n"
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@ -53,6 +58,10 @@ on_button_release (ClutterActor *actor,
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gfloat north_offset, south_offset;
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gfloat west_offset, east_offset;
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/* expand the 8 rectangles by animating the offset of the
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* bind constraints
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*/
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north_offset = (clutter_actor_get_height (rects[Center]) + V_PADDING)
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* -1.0f;
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south_offset = (clutter_actor_get_height (rects[Center]) + V_PADDING);
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@ -61,46 +70,58 @@ on_button_release (ClutterActor *actor,
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* -1.0f;
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east_offset = (clutter_actor_get_width (rects[Center]) + H_PADDING);
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clutter_actor_animate (rects[NorthWest], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[NorthWest], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", west_offset,
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"@constraints.y-bind.offset", north_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[North], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[North], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.y-bind.offset", north_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[NorthEast], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[NorthEast], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", east_offset,
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"@constraints.y-bind.offset", north_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[West], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[West], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", west_offset,
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"reactive", TRUE,
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NULL);
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/* turn on the desaturation effect and set the center
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* rectangle not reactive
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*/
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clutter_actor_animate (rects[Center], CLUTTER_LINEAR, 500,
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"@effects.desaturate.enabled", TRUE,
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"reactive", FALSE,
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NULL);
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clutter_actor_animate (rects[East], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[East], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", east_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[SouthWest], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[SouthWest], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", west_offset,
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"@constraints.y-bind.offset", south_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[South], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[South], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.y-bind.offset", south_offset,
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"reactive", TRUE,
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NULL);
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clutter_actor_animate (rects[SouthEast], CLUTTER_EASE_OUT_CUBIC, 500,
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clutter_actor_animate (rects[SouthEast], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 255,
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"@constraints.x-bind.offset", east_offset,
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"@constraints.y-bind.offset", south_offset,
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"reactive", TRUE,
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NULL);
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}
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else
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@ -109,6 +130,7 @@ on_button_release (ClutterActor *actor,
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clutter_actor_animate (rects[Center], CLUTTER_LINEAR, 500,
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"@effects.desaturate.enabled", FALSE,
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"reactive", TRUE,
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NULL);
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for (i = NorthWest; i < N_RECTS; i++)
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@ -116,16 +138,20 @@ on_button_release (ClutterActor *actor,
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if (i == Center)
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continue;
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clutter_actor_animate (rects[i], CLUTTER_EASE_OUT_CUBIC, 500,
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/* put the 8 rectangles back into their initial state */
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clutter_actor_animate (rects[i], CLUTTER_EASE_OUT_EXPO, 500,
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"opacity", 0,
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"@constraints.x-bind.offset", 0.0f,
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"@constraints.y-bind.offset", 0.0f,
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"reactive", FALSE,
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NULL);
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}
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}
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is_expanded = !is_expanded;
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g_print ("Selected: [%s]\n", clutter_actor_get_name (actor));
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return TRUE;
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}
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@ -147,7 +173,7 @@ test_constraints_main (int argc, char *argv[])
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clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE);
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clutter_actor_set_size (stage, 800, 600);
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/* main rect */
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/* main rectangle */
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clutter_color_from_string (&rect_color, "#3465a4");
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rect = clutter_rectangle_new ();
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g_signal_connect (rect, "button-release-event",
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@ -156,8 +182,10 @@ test_constraints_main (int argc, char *argv[])
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clutter_rectangle_set_color (CLUTTER_RECTANGLE (rect), &rect_color);
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clutter_actor_set_size (rect, RECT_SIZE, RECT_SIZE);
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clutter_actor_set_reactive (rect, TRUE);
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clutter_actor_set_name (rect, names[Center]);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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/* align the center rectangle to the center of the stage */
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constraint = clutter_align_constraint_new (stage, CLUTTER_ALIGN_X_AXIS, 0.5);
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clutter_actor_add_constraint_with_name (rect, "x-align", constraint);
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@ -175,12 +203,16 @@ test_constraints_main (int argc, char *argv[])
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clutter_shader_effect_set_uniform (CLUTTER_SHADER_EFFECT (effect),
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"tex", G_TYPE_INT, 1, 0);
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clutter_shader_effect_set_uniform (CLUTTER_SHADER_EFFECT (effect),
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"factor", G_TYPE_FLOAT, 1, 0.85);
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"factor", G_TYPE_FLOAT, 1, 0.66);
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clutter_actor_meta_set_enabled (CLUTTER_ACTOR_META (effect), FALSE);
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clutter_actor_add_effect_with_name (rect, "desaturate", effect);
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rects[Center] = rect;
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/* build the other rectangles, and bind their position and size
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* to the center rectangle. we are going to animate the offset
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* of the BindConstraints
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*/
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for (i = 0; i < N_RECTS; i++)
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{
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if (i == Center)
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@ -190,6 +222,7 @@ test_constraints_main (int argc, char *argv[])
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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_opacity (rect, 0);
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clutter_actor_set_name (rect, names[i]);
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clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);
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constraint = clutter_bind_constraint_new (rects[Center], CLUTTER_BIND_X, 0.0);
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@ -201,6 +234,10 @@ test_constraints_main (int argc, char *argv[])
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constraint = clutter_bind_constraint_new (rects[Center], CLUTTER_BIND_SIZE, 0.0);
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clutter_actor_add_constraint_with_name (rect, "size-bind", constraint);
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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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rects[i] = rect;
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}
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