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Diffstat (limited to 'src/compositor/meta-dnd-actor.c')
-rw-r--r-- | src/compositor/meta-dnd-actor.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/src/compositor/meta-dnd-actor.c b/src/compositor/meta-dnd-actor.c new file mode 100644 index 000000000..de58060b1 --- /dev/null +++ b/src/compositor/meta-dnd-actor.c @@ -0,0 +1,231 @@ +/* -*- 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); + } +} |