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compositor: Add MetaDnDActor

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This actor is a subclass of MetaFeedbackActor that additionally
implements the "drag failed" animation, snapping back to the drag
origin position in a surface.
This commit is contained in:
Carlos Garnacho 2014-10-06 16:53:04 +02:00 committed by Jasper St. Pierre
parent b588baf9f5
commit 28e59c5a8f
3 changed files with 297 additions and 0 deletions
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2
src/Makefile.am
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@ -109,6 +109,8 @@ libmutter_la_SOURCES = \
compositor/meta-background-group.c \
compositor/meta-cullable.c \
compositor/meta-cullable.h \
compositor/meta-dnd-actor.c \
compositor/meta-dnd-actor-private.h \
compositor/meta-feedback-actor.c \
compositor/meta-feedback-actor-private.h \
compositor/meta-module.c \

64
src/compositor/meta-dnd-actor-private.h Normal file
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@ -0,0 +1,64 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* meta-dnd-actor-private.h: Actor for painting the DnD surface
*
* Copyright 2014 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
#ifndef META_DND_ACTOR_PRIVATE_H
#define META_DND_ACTOR_PRIVATE_H
#include "meta-feedback-actor-private.h"
/**
* MetaDnDActor:
*
* This class handles the rendering of the DnD surface
*/
#define META_TYPE_DND_ACTOR (meta_dnd_actor_get_type ())
#define META_DND_ACTOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_DND_ACTOR, MetaDnDActor))
#define META_DND_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_DND_ACTOR, MetaDnDActorClass))
#define META_IS_DND_ACTOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_DND_ACTOR))
#define META_IS_DND_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_DND_ACTOR))
#define META_DND_ACTOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TYPE_DND_ACTOR, MetaDnDActorClass))
typedef struct _MetaDnDActor MetaDnDActor;
typedef struct _MetaDnDActorClass MetaDnDActorClass;
struct _MetaDnDActorClass
{
/*< private >*/
MetaFeedbackActorClass parent_class;
};
struct _MetaDnDActor
{
MetaFeedbackActor parent;
};
GType meta_dnd_actor_get_type (void);
ClutterActor *meta_dnd_actor_new (ClutterActor *drag_origin,
int start_x,
int start_y);
void meta_dnd_actor_drag_finish (MetaDnDActor *self,
gboolean success);
#endif /* META_DND_ACTOR_PRIVATE_H */

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src/compositor/meta-dnd-actor.c Normal file
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright 2014 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Carlos Garnacho <carlosg@gnome.org>
*/
/**
* SECTION:meta-dnd-actor
* @title: MetaDnDActor
* @short_description: Actor for painting the drag and drop surface
*
*/
#include <config.h>
#include <clutter/clutter.h>
#include "meta-dnd-actor-private.h"
#define DRAG_FAILED_DURATION 500
enum {
PROP_DRAG_ORIGIN = 1,
PROP_DRAG_START_X,
PROP_DRAG_START_Y
};
typedef struct _MetaDnDActorPrivate MetaDnDActorPrivate;
struct _MetaDnDActorPrivate
{
ClutterActor *drag_origin;
int drag_start_x;
int drag_start_y;
};
G_DEFINE_TYPE_WITH_PRIVATE (MetaDnDActor, meta_dnd_actor, META_TYPE_FEEDBACK_ACTOR)
static void
meta_dnd_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaDnDActor *self = META_DND_ACTOR (object);
MetaDnDActorPrivate *priv = meta_dnd_actor_get_instance_private (self);
switch (prop_id)
{
case PROP_DRAG_ORIGIN:
priv->drag_origin = g_value_get_object (value);
break;
case PROP_DRAG_START_X:
priv->drag_start_x = g_value_get_int (value);
break;
case PROP_DRAG_START_Y:
priv->drag_start_y = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_dnd_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaDnDActor *self = META_DND_ACTOR (object);
MetaDnDActorPrivate *priv = meta_dnd_actor_get_instance_private (self);
switch (prop_id)
{
case PROP_DRAG_ORIGIN:
g_value_set_object (value, priv->drag_origin);
break;
case PROP_DRAG_START_X:
g_value_set_int (value, priv->drag_start_x);
break;
case PROP_DRAG_START_Y:
g_value_set_int (value, priv->drag_start_y);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_dnd_actor_class_init (MetaDnDActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GParamSpec *pspec;
object_class->set_property = meta_dnd_actor_set_property;
object_class->get_property = meta_dnd_actor_get_property;
pspec = g_param_spec_object ("drag-origin",
"Drag origin",
"The origin of the DnD operation",
CLUTTER_TYPE_ACTOR,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_DRAG_ORIGIN,
pspec);
pspec = g_param_spec_int ("drag-start-x",
"Drag start X",
"The X axis of the drag start point",
0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_DRAG_START_X,
pspec);
pspec = g_param_spec_int ("drag-start-y",
"Drag start Y",
"The Y axis of the drag start point",
0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_DRAG_START_Y,
pspec);
}
static void
meta_dnd_actor_init (MetaDnDActor *self)
{
}
/**
* meta_dnd_actor_new:
*
* Creates a new actor to draw the current drag and drop surface.
*
* Return value: the newly created background actor
*/
ClutterActor *
meta_dnd_actor_new (ClutterActor *drag_origin,
int drag_start_x,
int drag_start_y)
{
MetaDnDActor *self;
self = g_object_new (META_TYPE_DND_ACTOR,
"drag-origin", drag_origin,
"drag-start-x", drag_start_x,
"drag-start-y", drag_start_y,
NULL);
return CLUTTER_ACTOR (self);
}
static void
drag_failed_complete (ClutterTimeline *timeline,
gboolean is_finished,
gpointer user_data)
{
ClutterActor *self = user_data;
clutter_actor_remove_all_children (self);
clutter_actor_destroy (self);
}
void
meta_dnd_actor_drag_finish (MetaDnDActor *self,
gboolean success)
{
MetaDnDActorPrivate *priv;
ClutterActor *actor;
g_return_if_fail (META_IS_DND_ACTOR (self));
actor = CLUTTER_ACTOR (self);
priv = meta_dnd_actor_get_instance_private (self);
if (success)
{
clutter_actor_remove_all_children (CLUTTER_ACTOR (self));
clutter_actor_destroy (CLUTTER_ACTOR (self));
}
else
{
ClutterTransition *transition;
clutter_actor_save_easing_state (actor);
clutter_actor_set_easing_mode (actor, CLUTTER_EASE_OUT_CUBIC);
clutter_actor_set_easing_duration (actor, DRAG_FAILED_DURATION);
clutter_actor_set_opacity (actor, 0);
if (CLUTTER_ACTOR_IS_VISIBLE (priv->drag_origin))
{
int anchor_x, anchor_y;
ClutterPoint dest;
clutter_actor_get_transformed_position (priv->drag_origin,
&dest.x, &dest.y);
meta_feedback_actor_get_anchor (META_FEEDBACK_ACTOR (self),
&anchor_x, &anchor_y);
dest.x += priv->drag_start_x - anchor_x;
dest.y += priv->drag_start_y - anchor_y;
clutter_actor_set_position (actor, dest.x, dest.y);
}
transition = clutter_actor_get_transition (actor, "opacity");
g_signal_connect (transition, "stopped",
G_CALLBACK (drag_failed_complete), self);
clutter_actor_restore_easing_state (actor);
}
}