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gimp/app/gimplayerlistitem.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimplayerlistitem.c
* Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "apptypes.h"
#include "drawable.h"
#include "gdisplay.h"
#include "gimpchannel.h"
#include "gimpcontainer.h"
#include "gimpdnd.h"
#include "gimplayerlistitem.h"
#include "gimpimage.h"
#include "gimplayer.h"
#include "gimplayermask.h"
#include "gimppreview.h"
#include "gimpviewable.h"
static void gimp_layer_list_item_class_init (GimpLayerListItemClass *klass);
static void gimp_layer_list_item_init (GimpLayerListItem *list_item);
static void gimp_layer_list_item_set_viewable (GimpListItem *list_item,
GimpViewable *viewable);
static gboolean gimp_layer_list_item_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean gimp_layer_list_item_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void gimp_layer_list_item_state_changed (GtkWidget *widget,
GtkStateType old_state);
static void gimp_layer_list_item_mask_changed (GimpLayer *layer,
GimpLayerListItem *layer_item);
static void gimp_layer_list_item_update_state (GtkWidget *widget);
static GimpDrawableListItemClass *parent_class = NULL;
GtkType
gimp_layer_list_item_get_type (void)
{
static GtkType list_item_type = 0;
if (! list_item_type)
{
static const GtkTypeInfo list_item_info =
{
"GimpLayerListItem",
sizeof (GimpLayerListItem),
sizeof (GimpLayerListItemClass),
(GtkClassInitFunc) gimp_layer_list_item_class_init,
(GtkObjectInitFunc) gimp_layer_list_item_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
list_item_type = gtk_type_unique (GIMP_TYPE_DRAWABLE_LIST_ITEM,
&list_item_info);
}
return list_item_type;
}
static void
gimp_layer_list_item_class_init (GimpLayerListItemClass *klass)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GimpListItemClass *list_item_class;
object_class = (GtkObjectClass *) klass;
widget_class = (GtkWidgetClass *) klass;
list_item_class = (GimpListItemClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_DRAWABLE_LIST_ITEM);
widget_class->drag_motion = gimp_layer_list_item_drag_motion;
widget_class->drag_drop = gimp_layer_list_item_drag_drop;
widget_class->state_changed = gimp_layer_list_item_state_changed;
list_item_class->set_viewable = gimp_layer_list_item_set_viewable;
}
static void
gimp_layer_list_item_init (GimpLayerListItem *list_item)
{
list_item->mask_preview = NULL;
}
static void
gimp_layer_list_item_set_viewable (GimpListItem *list_item,
GimpViewable *viewable)
{
GimpLayerListItem *layer_item;
GimpLayer *layer;
if (GIMP_LIST_ITEM_CLASS (parent_class)->set_viewable)
GIMP_LIST_ITEM_CLASS (parent_class)->set_viewable (list_item, viewable);
gimp_preview_set_size (GIMP_PREVIEW (list_item->preview),
list_item->preview_size, 2);
layer_item = GIMP_LAYER_LIST_ITEM (list_item);
layer = GIMP_LAYER (GIMP_PREVIEW (list_item->preview)->viewable);
if (gimp_layer_get_mask (layer))
{
gimp_layer_list_item_mask_changed (layer, layer_item);
}
gtk_signal_connect (GTK_OBJECT (layer), "mask_changed",
GTK_SIGNAL_FUNC (gimp_layer_list_item_mask_changed),
list_item);
}
static gboolean
gimp_layer_list_item_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GimpListItem *list_item;
GimpLayer *layer;
GimpViewable *src_viewable;
gint dest_index;
GdkDragAction drag_action;
GimpDropType drop_type;
gboolean return_val;
list_item = GIMP_LIST_ITEM (widget);
layer = GIMP_LAYER (GIMP_PREVIEW (list_item->preview)->viewable);
return_val = gimp_list_item_check_drag (list_item, context, x, y,
&src_viewable,
&dest_index,
&drag_action,
&drop_type);
if (! src_viewable ||
! gimp_drawable_has_alpha (GIMP_DRAWABLE (src_viewable)) ||
! layer ||
! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
{
drag_action = GDK_ACTION_DEFAULT;
drop_type = GIMP_DROP_NONE;
return_val = FALSE;
}
gdk_drag_status (context, drag_action, time);
list_item->drop_type = drop_type;
return return_val;
}
static gboolean
gimp_layer_list_item_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GimpListItem *list_item;
GimpLayer *layer;
GimpViewable *src_viewable;
gint dest_index;
GdkDragAction drag_action;
GimpDropType drop_type;
gboolean return_val;
list_item = GIMP_LIST_ITEM (widget);
layer = GIMP_LAYER (GIMP_PREVIEW (list_item->preview)->viewable);
return_val = gimp_list_item_check_drag (list_item, context, x, y,
&src_viewable,
&dest_index,
&drag_action,
&drop_type);
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (src_viewable)) ||
! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
{
drag_action = GDK_ACTION_DEFAULT;
drop_type = GIMP_DROP_NONE;
return_val = FALSE;
}
gtk_drag_finish (context, return_val, FALSE, time);
list_item->drop_type = GIMP_DROP_NONE;
if (return_val)
{
gimp_image_position_layer (gimp_drawable_gimage (GIMP_DRAWABLE (src_viewable)),
GIMP_LAYER (src_viewable),
dest_index,
TRUE);
gdisplays_flush ();
}
return return_val;
}
static void
gimp_layer_list_item_state_changed (GtkWidget *widget,
GtkStateType old_state)
{
if (GTK_WIDGET_CLASS (parent_class)->state_changed)
GTK_WIDGET_CLASS (parent_class)->state_changed (widget, old_state);
gimp_layer_list_item_update_state (widget);
}
static void
gimp_layer_list_item_mask_changed (GimpLayer *layer,
GimpLayerListItem *layer_item)
{
GimpListItem *list_item;
GimpLayerMask *mask;
list_item = GIMP_LIST_ITEM (layer_item);
mask = gimp_layer_get_mask (layer);
if (mask && ! layer_item->mask_preview)
{
layer_item->mask_preview = gimp_preview_new (GIMP_VIEWABLE (mask),
list_item->preview_size,
2, FALSE);
GIMP_PREVIEW (layer_item->mask_preview)->clickable = TRUE;
gtk_box_pack_start (GTK_BOX (list_item->hbox), layer_item->mask_preview,
FALSE, FALSE, 0);
gtk_box_reorder_child (GTK_BOX (list_item->hbox),
layer_item->mask_preview, 2);
gtk_widget_show (layer_item->mask_preview);
gtk_signal_connect_object
(GTK_OBJECT (mask), "apply_changed",
GTK_SIGNAL_FUNC (gimp_layer_list_item_update_state),
GTK_OBJECT (layer_item));
gtk_signal_connect_object_while_alive
(GTK_OBJECT (mask), "edit_changed",
GTK_SIGNAL_FUNC (gimp_layer_list_item_update_state),
GTK_OBJECT (layer_item));
gtk_signal_connect_object_while_alive
(GTK_OBJECT (mask), "show_changed",
GTK_SIGNAL_FUNC (gimp_layer_list_item_update_state),
GTK_OBJECT (layer_item));
}
else if (! mask && layer_item->mask_preview)
{
gtk_widget_destroy (layer_item->mask_preview);
layer_item->mask_preview = NULL;
}
gimp_layer_list_item_update_state (GTK_WIDGET (layer_item));
}
static void
gimp_layer_list_item_update_state (GtkWidget *widget)
{
GimpLayerListItem *layer_item;
GimpListItem *list_item;
GimpLayer *layer;
GimpLayerMask *mask;
GimpPreview *preview;
guchar layer_color[3] = { 0, 0, 0 };
guchar mask_color[3] = { 0, 0, 0 };
layer_item = GIMP_LAYER_LIST_ITEM (widget);
list_item = GIMP_LIST_ITEM (widget);
layer = GIMP_LAYER (GIMP_PREVIEW (list_item->preview)->viewable);
mask = gimp_layer_get_mask (layer);
switch (widget->state)
{
case GTK_STATE_NORMAL:
break;
case GTK_STATE_SELECTED:
if (! mask || (mask && ! gimp_layer_mask_get_edit (mask)))
{
layer_color[0] = 255;
layer_color[1] = 255;
layer_color[2] = 255;
}
else
{
mask_color[0] = 255;
mask_color[1] = 255;
mask_color[2] = 255;
}
break;
default:
g_print ("%s(): unhandled state\n", G_GNUC_FUNCTION);
}
preview = GIMP_PREVIEW (list_item->preview);
if (preview->border_color[0] != layer_color[0] ||
preview->border_color[1] != layer_color[1] ||
preview->border_color[2] != layer_color[2])
{
preview->border_color[0] = layer_color[0];
preview->border_color[1] = layer_color[1];
preview->border_color[2] = layer_color[2];
gimp_preview_render (preview);
}
if (mask)
{
preview = GIMP_PREVIEW (layer_item->mask_preview);
if (preview->border_color[0] != mask_color[0] ||
preview->border_color[1] != mask_color[1] ||
preview->border_color[2] != mask_color[2])
{
preview->border_color[0] = mask_color[0];
preview->border_color[1] = mask_color[1];
preview->border_color[2] = mask_color[2];
gimp_preview_render (preview);
}
}
}
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