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gimp/app/widgets/gimpcontainerview.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcontainerview.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 "widgets-types.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpmarshal.h"
#include "core/gimpviewable.h"
#include "gimpcontainerview.h"
#include "gimpdnd.h"
#include "gimppreviewrenderer.h"
enum
{
SELECT_ITEM,
ACTIVATE_ITEM,
CONTEXT_ITEM,
LAST_SIGNAL
};
static void gimp_container_view_class_init (GimpContainerViewClass *klass);
static void gimp_container_view_init (GimpContainerView *view,
GimpContainerViewClass *klass);
static void gimp_container_view_destroy (GtkObject *object);
static void gimp_container_view_real_set_container (GimpContainerView *view,
GimpContainer *container);
static void gimp_container_view_clear_items (GimpContainerView *view);
static void gimp_container_view_real_clear_items (GimpContainerView *view);
static void gimp_container_view_add_foreach (GimpViewable *viewable,
GimpContainerView *view);
static void gimp_container_view_add (GimpContainerView *view,
GimpViewable *viewable,
GimpContainer *container);
static void gimp_container_view_remove (GimpContainerView *view,
GimpViewable *viewable,
GimpContainer *container);
static void gimp_container_view_reorder (GimpContainerView *view,
GimpViewable *viewable,
gint new_index,
GimpContainer *container);
static void gimp_container_view_context_changed (GimpContext *context,
GimpViewable *viewable,
GimpContainerView *view);
static void gimp_container_view_viewable_dropped (GtkWidget *widget,
GimpViewable *viewable,
gpointer data);
static void gimp_container_view_button_viewable_dropped (GtkWidget *widget,
GimpViewable *viewable,
gpointer data);
static guint view_signals[LAST_SIGNAL] = { 0 };
static GimpEditorClass *parent_class = NULL;
GType
gimp_container_view_get_type (void)
{
static GType view_type = 0;
if (! view_type)
{
static const GTypeInfo view_info =
{
sizeof (GimpContainerViewClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_container_view_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpContainerView),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_container_view_init,
};
view_type = g_type_register_static (GIMP_TYPE_EDITOR,
"GimpContainerView",
&view_info, 0);
}
return view_type;
}
static void
gimp_container_view_class_init (GimpContainerViewClass *klass)
{
GtkObjectClass *object_class;
object_class = GTK_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
view_signals[SELECT_ITEM] =
g_signal_new ("select_item",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpContainerViewClass, select_item),
NULL, NULL,
gimp_marshal_BOOLEAN__OBJECT_POINTER,
G_TYPE_BOOLEAN, 2,
GIMP_TYPE_OBJECT,
G_TYPE_POINTER);
view_signals[ACTIVATE_ITEM] =
g_signal_new ("activate_item",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpContainerViewClass, activate_item),
NULL, NULL,
gimp_marshal_VOID__OBJECT_POINTER,
G_TYPE_NONE, 2,
GIMP_TYPE_OBJECT,
G_TYPE_POINTER);
view_signals[CONTEXT_ITEM] =
g_signal_new ("context_item",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpContainerViewClass, context_item),
NULL, NULL,
gimp_marshal_VOID__OBJECT_POINTER,
G_TYPE_NONE, 2,
GIMP_TYPE_OBJECT,
G_TYPE_POINTER);
object_class->destroy = gimp_container_view_destroy;
klass->select_item = NULL;
klass->activate_item = NULL;
klass->context_item = NULL;
klass->set_container = gimp_container_view_real_set_container;
klass->insert_item = NULL;
klass->remove_item = NULL;
klass->reorder_item = NULL;
klass->clear_items = gimp_container_view_real_clear_items;
klass->set_preview_size = NULL;
klass->insert_data_free = NULL;
}
static void
gimp_container_view_init (GimpContainerView *view,
GimpContainerViewClass *klass)
{
view->container = NULL;
view->context = NULL;
view->hash_table = g_hash_table_new_full (g_direct_hash,
g_direct_equal,
NULL,
klass->insert_data_free);
view->preview_size = 0;
view->preview_border_width = 1;
view->reorderable = FALSE;
view->scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gtk_box_pack_start (GTK_BOX (view), view->scrolled_win, TRUE, TRUE, 0);
gtk_widget_show (view->scrolled_win);
GTK_WIDGET_UNSET_FLAGS (GTK_SCROLLED_WINDOW (view->scrolled_win)->vscrollbar,
GTK_CAN_FOCUS);
view->dnd_widget = view->scrolled_win;
}
static void
gimp_container_view_destroy (GtkObject *object)
{
GimpContainerView *view;
view = GIMP_CONTAINER_VIEW (object);
if (view->container)
gimp_container_view_set_container (view, NULL);
if (view->context)
gimp_container_view_set_context (view, NULL);
if (view->hash_table)
{
g_hash_table_destroy (view->hash_table);
view->hash_table = NULL;
}
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
void
gimp_container_view_set_container (GimpContainerView *view,
GimpContainer *container)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (container == NULL || GIMP_IS_CONTAINER (container));
if (container != view->container)
GIMP_CONTAINER_VIEW_GET_CLASS (view)->set_container (view, container);
}
static void
gimp_container_view_real_set_container (GimpContainerView *view,
GimpContainer *container)
{
if (view->container)
{
GimpContainerViewClass *view_class;
gimp_container_view_select_item (view, NULL);
gimp_container_view_clear_items (view);
g_signal_handlers_disconnect_by_func (view->container,
gimp_container_view_add,
view);
g_signal_handlers_disconnect_by_func (view->container,
gimp_container_view_remove,
view);
g_signal_handlers_disconnect_by_func (view->container,
gimp_container_view_reorder,
view);
g_hash_table_destroy (view->hash_table);
view_class = GIMP_CONTAINER_VIEW_GET_CLASS (view);
view->hash_table = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL,
view_class->insert_data_free);
if (view->context)
{
g_signal_handlers_disconnect_by_func (view->context,
gimp_container_view_context_changed,
view);
if (view->dnd_widget)
{
gtk_drag_dest_unset (GTK_WIDGET (view->dnd_widget));
gimp_dnd_viewable_dest_remove (GTK_WIDGET (view->dnd_widget),
view->container->children_type);
}
}
}
view->container = container;
if (view->container)
{
gimp_container_foreach (view->container,
(GFunc) gimp_container_view_add_foreach,
view);
g_signal_connect_object (view->container, "add",
G_CALLBACK (gimp_container_view_add),
view,
G_CONNECT_SWAPPED);
g_signal_connect_object (view->container, "remove",
G_CALLBACK (gimp_container_view_remove),
view,
G_CONNECT_SWAPPED);
g_signal_connect_object (view->container, "reorder",
G_CALLBACK (gimp_container_view_reorder),
view,
G_CONNECT_SWAPPED);
if (view->context)
{
GimpObject *object;
const gchar *signal_name;
signal_name =
gimp_context_type_to_signal_name (view->container->children_type);
g_signal_connect_object (view->context, signal_name,
G_CALLBACK (gimp_container_view_context_changed),
view,
0);
object = gimp_context_get_by_type (view->context,
view->container->children_type);
gimp_container_view_select_item (view, (GimpViewable *) object);
if (view->dnd_widget)
gimp_dnd_viewable_dest_add (GTK_WIDGET (view->dnd_widget),
view->container->children_type,
gimp_container_view_viewable_dropped,
view);
}
}
}
void
gimp_container_view_construct (GimpContainerView *view,
GimpContainer *container,
GimpContext *context,
gint preview_size,
gint preview_border_width,
gboolean reorderable)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (container == NULL || GIMP_IS_CONTAINER (container));
g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
g_return_if_fail (preview_size > 0 &&
preview_size <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
g_return_if_fail (preview_border_width >= 0 &&
preview_border_width <= GIMP_PREVIEW_MAX_BORDER_WIDTH);
view->reorderable = reorderable ? TRUE : FALSE;
gimp_container_view_set_preview_size (view, preview_size,
preview_border_width);
if (container)
gimp_container_view_set_container (view, container);
if (context)
gimp_container_view_set_context (view, context);
}
void
gimp_container_view_set_context (GimpContainerView *view,
GimpContext *context)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (! context || GIMP_IS_CONTEXT (context));
if (context == view->context)
return;
if (view->context)
{
if (view->container)
{
g_signal_handlers_disconnect_by_func (view->context,
gimp_container_view_context_changed,
view);
if (view->dnd_widget)
{
gtk_drag_dest_unset (GTK_WIDGET (view->dnd_widget));
gimp_dnd_viewable_dest_remove (GTK_WIDGET (view->dnd_widget),
view->container->children_type);
}
}
g_object_unref (view->context);
}
view->context = context;
if (view->context)
{
g_object_ref (view->context);
if (view->container)
{
GimpObject *object;
const gchar *signal_name;
signal_name =
gimp_context_type_to_signal_name (view->container->children_type);
g_signal_connect_object (view->context, signal_name,
G_CALLBACK (gimp_container_view_context_changed),
view,
0);
object = gimp_context_get_by_type (view->context,
view->container->children_type);
gimp_container_view_select_item (view, (GimpViewable *) object);
if (view->dnd_widget)
gimp_dnd_viewable_dest_add (GTK_WIDGET (view->dnd_widget),
view->container->children_type,
gimp_container_view_viewable_dropped,
view);
}
}
}
void
gimp_container_view_set_preview_size (GimpContainerView *view,
gint preview_size,
gint preview_border_width)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (preview_size > 0 &&
preview_size <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE);
g_return_if_fail (preview_border_width >= 0 &&
preview_border_width <= GIMP_PREVIEW_MAX_BORDER_WIDTH);
if (view->preview_size != preview_size ||
view->preview_border_width != preview_border_width)
{
view->preview_size = preview_size;
view->preview_border_width = preview_border_width;
GIMP_CONTAINER_VIEW_GET_CLASS (view)->set_preview_size (view);
}
}
void
gimp_container_view_enable_dnd (GimpContainerView *view,
GtkButton *button,
GType children_type)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (GTK_IS_BUTTON (button));
gimp_dnd_viewable_dest_add (GTK_WIDGET (button),
children_type,
gimp_container_view_button_viewable_dropped,
view);
}
void
gimp_container_view_set_size_request (GimpContainerView *view,
gint width,
gint height)
{
GtkScrolledWindowClass *sw_class;
GtkRequisition req;
gint scrollbar_width;
gint border_x;
gint border_y;
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (width <= 0 || width >= view->preview_size);
g_return_if_fail (height <= 0 || height >= view->preview_size);
sw_class = GTK_SCROLLED_WINDOW_GET_CLASS (view->scrolled_win);
if (sw_class->scrollbar_spacing >= 0)
width = sw_class->scrollbar_spacing;
else
gtk_widget_style_get (GTK_WIDGET (view->scrolled_win),
"scrollbar_spacing", &scrollbar_width,
NULL);
gtk_widget_size_request (GTK_SCROLLED_WINDOW (view->scrolled_win)->vscrollbar,
&req);
scrollbar_width += req.width;
border_x = view->scrolled_win->style->xthickness * 2 + scrollbar_width;
border_y = view->scrolled_win->style->ythickness * 2;
gtk_widget_set_size_request (view->scrolled_win,
width > 0 ? width + border_x : -1,
height > 0 ? height + border_y : -1);
}
gboolean
gimp_container_view_select_item (GimpContainerView *view,
GimpViewable *viewable)
{
gboolean success = FALSE;
g_return_val_if_fail (GIMP_IS_CONTAINER_VIEW (view), FALSE);
g_return_val_if_fail (viewable == NULL || GIMP_IS_VIEWABLE (viewable), FALSE);
if (view->hash_table)
{
gpointer insert_data;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
g_signal_emit (view, view_signals[SELECT_ITEM], 0,
viewable, insert_data, &success);
}
return success;
}
void
gimp_container_view_activate_item (GimpContainerView *view,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (GIMP_IS_VIEWABLE (viewable));
if (view->hash_table)
{
gpointer insert_data;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
g_signal_emit (view, view_signals[ACTIVATE_ITEM], 0,
viewable, insert_data);
}
}
void
gimp_container_view_context_item (GimpContainerView *view,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (GIMP_IS_VIEWABLE (viewable));
if (view->hash_table)
{
gpointer insert_data;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
g_signal_emit (view, view_signals[CONTEXT_ITEM], 0,
viewable, insert_data);
}
}
gboolean
gimp_container_view_item_selected (GimpContainerView *view,
GimpViewable *viewable)
{
gboolean success;
g_return_val_if_fail (GIMP_IS_CONTAINER_VIEW (view), FALSE);
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), FALSE);
success = gimp_container_view_select_item (view, viewable);
if (success && view->container && view->context)
{
GimpContext *context;
/* ref and remember the context because view->context may
* become NULL by calling gimp_context_set_by_type()
*/
context = g_object_ref (view->context);
g_signal_handlers_block_by_func (context,
gimp_container_view_context_changed,
view);
gimp_context_set_by_type (context,
view->container->children_type,
GIMP_OBJECT (viewable));
g_signal_handlers_unblock_by_func (context,
gimp_container_view_context_changed,
view);
g_object_unref (context);
}
return success;
}
void
gimp_container_view_item_activated (GimpContainerView *view,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (GIMP_IS_VIEWABLE (viewable));
gimp_container_view_activate_item (view, viewable);
}
void
gimp_container_view_item_context (GimpContainerView *view,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_CONTAINER_VIEW (view));
g_return_if_fail (GIMP_IS_VIEWABLE (viewable));
gimp_container_view_context_item (view, viewable);
}
static void
gimp_container_view_clear_items (GimpContainerView *view)
{
GIMP_CONTAINER_VIEW_GET_CLASS (view)->clear_items (view);
}
static void
gimp_container_view_real_clear_items (GimpContainerView *view)
{
GimpContainerViewClass *view_class;
view_class = GIMP_CONTAINER_VIEW_GET_CLASS (view);
g_hash_table_destroy (view->hash_table);
view->hash_table = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL,
view_class->insert_data_free);
}
static void
gimp_container_view_add_foreach (GimpViewable *viewable,
GimpContainerView *view)
{
gpointer insert_data;
insert_data = GIMP_CONTAINER_VIEW_GET_CLASS (view)->insert_item (view,
viewable,
-1);
g_hash_table_insert (view->hash_table, viewable, insert_data);
}
static void
gimp_container_view_add (GimpContainerView *view,
GimpViewable *viewable,
GimpContainer *container)
{
gpointer insert_data = NULL;
gint index;
index = gimp_container_get_child_index (container,
GIMP_OBJECT (viewable));
insert_data = GIMP_CONTAINER_VIEW_GET_CLASS (view)->insert_item (view,
viewable,
index);
g_hash_table_insert (view->hash_table, viewable, insert_data);
}
static void
gimp_container_view_remove (GimpContainerView *view,
GimpViewable *viewable,
GimpContainer *container)
{
gpointer insert_data;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
if (insert_data)
{
GIMP_CONTAINER_VIEW_GET_CLASS (view)->remove_item (view,
viewable,
insert_data);
g_hash_table_remove (view->hash_table, viewable);
}
}
static void
gimp_container_view_reorder (GimpContainerView *view,
GimpViewable *viewable,
gint new_index,
GimpContainer *container)
{
gpointer insert_data;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
if (insert_data)
{
GIMP_CONTAINER_VIEW_GET_CLASS (view)->reorder_item (view,
viewable,
new_index,
insert_data);
}
}
static void
gimp_container_view_context_changed (GimpContext *context,
GimpViewable *viewable,
GimpContainerView *view)
{
gpointer insert_data;
gboolean success = FALSE;
insert_data = g_hash_table_lookup (view->hash_table, viewable);
g_signal_emit (view, view_signals[SELECT_ITEM], 0,
viewable, insert_data, &success);
if (! success)
g_warning ("gimp_container_view_context_changed(): select_item() failed "
"(should not happen)");
}
static void
gimp_container_view_viewable_dropped (GtkWidget *widget,
GimpViewable *viewable,
gpointer data)
{
GimpContainerView *view;
view = GIMP_CONTAINER_VIEW (data);
gimp_context_set_by_type (view->context,
view->container->children_type,
GIMP_OBJECT (viewable));
}
static void
gimp_container_view_button_viewable_dropped (GtkWidget *widget,
GimpViewable *viewable,
gpointer data)
{
GimpContainerView *view;
view = (GimpContainerView *) data;
if (viewable && gimp_container_have (view->container,
GIMP_OBJECT (viewable)))
{
gimp_container_view_item_selected (view, viewable);
gtk_button_clicked (GTK_BUTTON (widget));
}
}
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