[clutter/wip/master-next: 14/23] actor: Add :pivot-point-z
- From: Emmanuele Bassi <ebassi src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [clutter/wip/master-next: 14/23] actor: Add :pivot-point-z
- Date: Tue, 10 Jul 2012 07:29:47 +0000 (UTC)
commit e2784f5129667bd8c71e3f830c798a6256bb3d17
Author: Emmanuele Bassi <ebassi gnome org>
Date: Fri Jul 6 14:28:48 2012 +0100
actor: Add :pivot-point-z
For some transformations we need to be able to set the Z component of
the pivot point.
Unlike :pivot-point, the Z coordinate is not normalized because actors
are 2D surfaces.
https://bugzilla.gnome.org/show_bug.cgi?id=677853
clutter/clutter-actor-private.h | 1 +
clutter/clutter-actor.c | 144 ++++++++++++++++++++++++++++++++++-----
clutter/clutter-actor.h | 5 ++
clutter/clutter.symbols | 2 +
4 files changed, 135 insertions(+), 17 deletions(-)
---
diff --git a/clutter/clutter-actor-private.h b/clutter/clutter-actor-private.h
index 6d7deec..0efd8ec 100644
--- a/clutter/clutter-actor-private.h
+++ b/clutter/clutter-actor-private.h
@@ -204,6 +204,7 @@ struct _ClutterTransformInfo
/* transformation center */
ClutterPoint pivot;
+ gfloat pivot_z;
};
const ClutterTransformInfo * _clutter_actor_get_transform_info_or_defaults (ClutterActor *self);
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 7f78e09..84f28ea 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -871,6 +871,7 @@ enum
PROP_REACTIVE,
PROP_PIVOT_POINT,
+ PROP_PIVOT_POINT_Z,
PROP_SCALE_X,
PROP_SCALE_Y,
@@ -2952,6 +2953,7 @@ clutter_actor_real_apply_transform (ClutterActor *self,
info = _clutter_actor_get_transform_info_or_defaults (self);
+ /* compute the pivot point given the allocated size */
if (!clutter_point_equals (&info->pivot, clutter_point_zero ()))
{
pivot_x = (priv->allocation.x2 - priv->allocation.x1)
@@ -2972,7 +2974,7 @@ clutter_actor_real_apply_transform (ClutterActor *self,
/* pivot point, used as the transformation center */
if (pivot_x != 0.f || pivot_y != 0.f)
- cogl_matrix_translate (transform, pivot_x, pivot_y, 0.f);
+ cogl_matrix_translate (transform, pivot_x, pivot_y, info->pivot_z);
/*
* because the rotation involves translations, we must scale
@@ -2992,25 +2994,31 @@ clutter_actor_real_apply_transform (ClutterActor *self,
}
if (info->rz_angle)
- TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
- &info->rz_center,
- cogl_matrix_rotate (transform,
- info->rz_angle,
- 0, 0, 1.0));
+ {
+ TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
+ &info->rz_center,
+ cogl_matrix_rotate (transform,
+ info->rz_angle,
+ 0, 0, 1.0));
+ }
if (info->ry_angle)
- TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
- &info->ry_center,
- cogl_matrix_rotate (transform,
- info->ry_angle,
- 0, 1.0, 0));
+ {
+ TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
+ &info->ry_center,
+ cogl_matrix_rotate (transform,
+ info->ry_angle,
+ 0, 1.0, 0));
+ }
if (info->rx_angle)
- TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
- &info->rx_center,
- cogl_matrix_rotate (transform,
- info->rx_angle,
- 1.0, 0, 0));
+ {
+ TRANSFORM_ABOUT_ANCHOR_COORD (self, transform,
+ &info->rx_center,
+ cogl_matrix_rotate (transform,
+ info->rx_angle,
+ 1.0, 0, 0));
+ }
if (!clutter_anchor_coord_is_zero (&info->anchor))
{
@@ -4093,9 +4101,10 @@ static const ClutterTransformInfo default_transform_info = {
{ 0, }, /* anchor */
- 0.0, /* z-position */
+ 0.f, /* z-position */
CLUTTER_POINT_INIT_ZERO, /* pivot */
+ 0.f /* pivot-z */
};
/*< private >
@@ -4183,6 +4192,22 @@ clutter_actor_set_pivot_point_internal (ClutterActor *self,
clutter_actor_queue_redraw (self);
}
+static inline void
+clutter_actor_set_pivot_point_z_internal (ClutterActor *self,
+ float pivot_z)
+{
+ ClutterTransformInfo *info;
+
+ info = _clutter_actor_get_transform_info (self);
+ info->pivot_z = pivot_z;
+
+ self->priv->transform_valid = FALSE;
+
+ g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_PIVOT_POINT_Z]);
+
+ clutter_actor_queue_redraw (self);
+}
+
/*< private >
* clutter_actor_set_rotation_angle_internal:
* @self: a #ClutterActor
@@ -4705,6 +4730,10 @@ clutter_actor_set_property (GObject *object,
}
break;
+ case PROP_PIVOT_POINT_Z:
+ clutter_actor_set_pivot_point_z (actor, g_value_get_float (value));
+ break;
+
case PROP_SCALE_X:
clutter_actor_set_scale_factor (actor, CLUTTER_X_AXIS,
g_value_get_double (value));
@@ -5091,6 +5120,15 @@ clutter_actor_get_property (GObject *object,
}
break;
+ case PROP_PIVOT_POINT_Z:
+ {
+ const ClutterTransformInfo *info;
+
+ info = _clutter_actor_get_transform_info_or_defaults (actor);
+ g_value_set_float (value, info->pivot_z);
+ }
+ break;
+
case PROP_SCALE_X:
{
const ClutterTransformInfo *info;
@@ -6363,6 +6401,26 @@ clutter_actor_class_init (ClutterActorClass *klass)
CLUTTER_PARAM_ANIMATABLE);
/**
+ * ClutterActor:pivot-point-z:
+ *
+ * The Z component of the #ClutterActor:pivot-point, expressed as a value
+ * along the Z axis.
+ *
+ * The #ClutterActor:pivot-point-z property is animatable.
+ *
+ * Since: 1.12
+ */
+ obj_props[PROP_PIVOT_POINT_Z] =
+ g_param_spec_float ("pivot-point-z",
+ P_("Pivot Point Z"),
+ P_("Z component of the pivot point"),
+ -G_MAXFLOAT, G_MAXFLOAT,
+ 0.f,
+ G_PARAM_READWRITE |
+ G_PARAM_STATIC_STRINGS |
+ CLUTTER_PARAM_ANIMATABLE);
+
+ /**
* ClutterActor:scale-x:
*
* The horizontal scale of the actor.
@@ -11185,6 +11243,54 @@ clutter_actor_get_pivot_point (ClutterActor *self,
}
/**
+ * clutter_actor_set_pivot_point_z:
+ * @self: a #ClutterActor
+ * @pivot_z: the Z coordinate of the actor's pivot point
+ *
+ * Sets the component on the Z axis of the #ClutterActor:pivot-point around
+ * which the scaling and rotation transformations occur.
+ *
+ * The @pivot_z value is expressed as a distance along the Z axis.
+ *
+ * Since: 1.12
+ */
+void
+clutter_actor_set_pivot_point_z (ClutterActor *self,
+ gfloat pivot_z)
+{
+ g_return_if_fail (CLUTTER_IS_ACTOR (self));
+
+ if (_clutter_actor_get_transition (self, obj_props[PROP_PIVOT_POINT_Z]) == NULL)
+ {
+ const ClutterTransformInfo *info;
+
+ info = _clutter_actor_get_transform_info_or_defaults (self);
+
+ _clutter_actor_create_transition (self, obj_props[PROP_PIVOT_POINT_Z],
+ info->pivot_z,
+ pivot_z);
+ }
+ else
+ _clutter_actor_update_transition (self, obj_props[PROP_PIVOT_POINT_Z], pivot_z);
+}
+
+/**
+ * clutter_actor_get_pivot_point_z:
+ * @self: a #ClutterActor
+ *
+ * Retrieves the Z component of the #ClutterActor:pivot-point.
+ *
+ * Since: 1.12
+ */
+gfloat
+clutter_actor_get_pivot_point_z (ClutterActor *self)
+{
+ g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.f);
+
+ return _clutter_actor_get_transform_info_or_defaults (self)->pivot_z;
+}
+
+/**
* clutter_actor_set_depth:
* @self: a #ClutterActor
* @depth: Z co-ord
@@ -14029,6 +14135,10 @@ clutter_actor_set_animatable_property (ClutterActor *actor,
clutter_actor_set_pivot_point_internal (actor, g_value_get_boxed (value));
break;
+ case PROP_PIVOT_POINT_Z:
+ clutter_actor_set_pivot_point_z_internal (actor, g_value_get_float (value));
+ break;
+
case PROP_SCALE_X:
clutter_actor_set_scale_factor_internal (actor,
g_value_get_double (value),
diff --git a/clutter/clutter-actor.h b/clutter/clutter-actor.h
index 32bbfec..20e45f3 100644
--- a/clutter/clutter-actor.h
+++ b/clutter/clutter-actor.h
@@ -634,6 +634,11 @@ void clutter_actor_get_pivot_point
gfloat *pivot_x,
gfloat *pivot_y);
CLUTTER_AVAILABLE_IN_1_12
+void clutter_actor_set_pivot_point_z (ClutterActor *self,
+ gfloat pivot_z);
+CLUTTER_AVAILABLE_IN_1_12
+gfloat clutter_actor_get_pivot_point_z (ClutterActor *self);
+CLUTTER_AVAILABLE_IN_1_12
void clutter_actor_set_rotation_angle (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle);
diff --git a/clutter/clutter.symbols b/clutter/clutter.symbols
index a32a219..15a6395 100644
--- a/clutter/clutter.symbols
+++ b/clutter/clutter.symbols
@@ -130,6 +130,7 @@ clutter_actor_get_paint_visibility
clutter_actor_get_paint_volume
clutter_actor_get_pango_context
clutter_actor_get_parent
+clutter_actor_get_pivot_point_z
clutter_actor_get_pivot_point
clutter_actor_get_position
clutter_actor_get_preferred_height
@@ -254,6 +255,7 @@ clutter_actor_set_name
clutter_actor_set_offscreen_redirect
clutter_actor_set_opacity
clutter_actor_set_parent
+clutter_actor_set_pivot_point_z
clutter_actor_set_pivot_point
clutter_actor_set_position
clutter_actor_set_reactive
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