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gimp/app/widgets/gimplistitem.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimplistitem.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"
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimpchannel.h"
#include "core/gimpcontainer.h"
#include "core/gimplayer.h"
#include "core/gimpviewable.h"
#include "gimpchannellistitem.h"
#include "gimpdnd.h"
#include "gimpdrawablelistitem.h"
#include "gimplayerlistitem.h"
#include "gimplistitem.h"
#include "gimppreview.h"
static void gimp_list_item_class_init (GimpListItemClass *klass);
static void gimp_list_item_init (GimpListItem *list_item);
static void gimp_list_item_real_set_viewable (GimpListItem *list_item,
GimpViewable *viewable);
static void gimp_list_item_real_set_preview_size (GimpListItem *list_item);
static gboolean gimp_list_item_expose_event (GtkWidget *widget,
GdkEventExpose *eevent);
static void gimp_list_item_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time);
static gboolean gimp_list_item_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean gimp_list_item_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static void gimp_list_item_name_changed (GimpViewable *viewable,
GimpListItem *list_item);
static GimpViewable * gimp_list_item_drag_viewable (GtkWidget *widget,
gpointer data);
static GtkListItemClass *parent_class = NULL;
GType
gimp_list_item_get_type (void)
{
static GType list_item_type = 0;
if (! list_item_type)
{
static const GTypeInfo list_item_info =
{
sizeof (GimpListItemClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_list_item_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpListItem),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_list_item_init,
};
list_item_type = g_type_register_static (GTK_TYPE_LIST_ITEM,
"GimpListItem",
&list_item_info, 0);
}
return list_item_type;
}
static void
gimp_list_item_class_init (GimpListItemClass *klass)
{
GtkWidgetClass *widget_class;
widget_class = GTK_WIDGET_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
widget_class->expose_event = gimp_list_item_expose_event;
widget_class->drag_leave = gimp_list_item_drag_leave;
widget_class->drag_motion = gimp_list_item_drag_motion;
widget_class->drag_drop = gimp_list_item_drag_drop;
klass->set_viewable = gimp_list_item_real_set_viewable;
klass->set_preview_size = gimp_list_item_real_set_preview_size;
}
static void
gimp_list_item_init (GimpListItem *list_item)
{
list_item->hbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (list_item->hbox), 2);
gtk_container_add (GTK_CONTAINER (list_item), list_item->hbox);
gtk_widget_show (list_item->hbox);
list_item->preview = NULL;
list_item->name_label = NULL;
list_item->preview_size = 0;
list_item->reorderable = FALSE;
list_item->convertable = FALSE;
list_item->drop_type = GIMP_DROP_NONE;
list_item->container = NULL;
list_item->get_name_func = NULL;
}
static gboolean
gimp_list_item_expose_event (GtkWidget *widget,
GdkEventExpose *eevent)
{
GimpListItem *list_item;
list_item = GIMP_LIST_ITEM (widget);
GTK_WIDGET_CLASS (parent_class)->expose_event (widget, eevent);
if (list_item->drop_type != GIMP_DROP_NONE)
{
gint x, y;
x = list_item->name_label->allocation.x;
y = ((list_item->drop_type == GIMP_DROP_ABOVE) ?
3 : widget->allocation.height - 4);
gdk_gc_set_line_attributes (widget->style->black_gc, 5, GDK_LINE_SOLID,
GDK_CAP_BUTT, GDK_JOIN_MITER);
gdk_gc_set_clip_rectangle (widget->style->black_gc, &eevent->area);
gdk_draw_line (widget->window, widget->style->black_gc,
x, y,
widget->allocation.width - 3, y);
gdk_gc_set_clip_rectangle (widget->style->black_gc, NULL);
gdk_gc_set_line_attributes (widget->style->black_gc, 0, GDK_LINE_SOLID,
GDK_CAP_BUTT, GDK_JOIN_MITER);
}
return TRUE;
}
static void
gimp_list_item_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
GimpListItem *list_item;
list_item = GIMP_LIST_ITEM (widget);
list_item->drop_type = GIMP_DROP_NONE;
}
static gboolean
gimp_list_item_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GimpListItem *list_item;
GimpViewable *src_viewable;
gint dest_index;
GdkDragAction drag_action;
GimpDropType drop_type;
gboolean return_val;
list_item = GIMP_LIST_ITEM (widget);
return_val = gimp_list_item_check_drag (list_item, context, x, y,
&src_viewable,
&dest_index,
&drag_action,
&drop_type);
gdk_drag_status (context, drag_action, time);
if (list_item->drop_type != drop_type)
{
list_item->drop_type = drop_type;
gtk_widget_queue_draw (widget);
}
return return_val;
}
static gboolean
gimp_list_item_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GimpListItem *list_item;
GimpViewable *src_viewable;
gint dest_index;
GdkDragAction drag_action;
GimpDropType drop_type;
gboolean return_val;
list_item = GIMP_LIST_ITEM (widget);
return_val = gimp_list_item_check_drag (list_item, context, x, y,
&src_viewable,
&dest_index,
&drag_action,
&drop_type);
gtk_drag_finish (context, return_val, FALSE, time);
list_item->drop_type = GIMP_DROP_NONE;
if (return_val)
{
gimp_container_reorder (list_item->container,
GIMP_OBJECT (src_viewable),
dest_index);
}
return return_val;
}
GtkWidget *
gimp_list_item_new (GimpViewable *viewable,
gint preview_size)
{
GimpListItem *list_item;
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), NULL);
g_return_val_if_fail (preview_size > 0 &&
preview_size <= GIMP_PREVIEW_MAX_SIZE, NULL);
if (GIMP_IS_LAYER (viewable))
{
list_item = g_object_new (GIMP_TYPE_LAYER_LIST_ITEM, NULL);
}
else if (GIMP_IS_CHANNEL (viewable))
{
list_item = g_object_new (GIMP_TYPE_CHANNEL_LIST_ITEM, NULL);
}
else if (GIMP_IS_DRAWABLE (viewable))
{
list_item = g_object_new (GIMP_TYPE_DRAWABLE_LIST_ITEM, NULL);
}
else if (GIMP_IS_ITEM (viewable))
{
list_item = g_object_new (GIMP_TYPE_ITEM_LIST_ITEM, NULL);
}
else
{
list_item = g_object_new (GIMP_TYPE_LIST_ITEM, NULL);
}
list_item->preview_size = preview_size;
gimp_list_item_set_viewable (list_item, viewable);
return GTK_WIDGET (list_item);
}
void
gimp_list_item_set_viewable (GimpListItem *list_item,
GimpViewable *viewable)
{
g_return_if_fail (GIMP_IS_LIST_ITEM (list_item));
GIMP_LIST_ITEM_GET_CLASS (list_item)->set_viewable (list_item, viewable);
}
static void
gimp_list_item_real_set_viewable (GimpListItem *list_item,
GimpViewable *viewable)
{
list_item->preview = gimp_preview_new (viewable, list_item->preview_size,
1, FALSE);
gtk_box_pack_start (GTK_BOX (list_item->hbox), list_item->preview,
FALSE, FALSE, 0);
gtk_widget_show (list_item->preview);
list_item->name_label = gtk_label_new (NULL);
gtk_box_pack_start (GTK_BOX (list_item->hbox), list_item->name_label,
FALSE, FALSE, 0);
gtk_widget_show (list_item->name_label);
gimp_list_item_name_changed (viewable, list_item);
g_signal_connect_object (G_OBJECT (viewable),
GIMP_VIEWABLE_GET_CLASS (viewable)->name_changed_signal,
G_CALLBACK (gimp_list_item_name_changed),
list_item, 0);
gimp_dnd_drag_source_set_by_type (GTK_WIDGET (list_item),
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
G_TYPE_FROM_INSTANCE (viewable),
GDK_ACTION_MOVE | GDK_ACTION_COPY);
gimp_dnd_viewable_source_set (GTK_WIDGET (list_item),
G_TYPE_FROM_INSTANCE (viewable),
gimp_list_item_drag_viewable,
NULL);
}
void
gimp_list_item_set_preview_size (GimpListItem *list_item,
gint preview_size)
{
g_return_if_fail (GIMP_IS_LIST_ITEM (list_item));
g_return_if_fail (preview_size > 0 && preview_size <= GIMP_PREVIEW_MAX_SIZE);
list_item->preview_size = preview_size;
GIMP_LIST_ITEM_GET_CLASS (list_item)->set_preview_size (list_item);
}
static void
gimp_list_item_real_set_preview_size (GimpListItem *list_item)
{
GimpPreview *preview;
preview = GIMP_PREVIEW (list_item->preview);
gimp_preview_set_size (preview,
list_item->preview_size, preview->border_width);
}
void
gimp_list_item_set_reorderable (GimpListItem *list_item,
gboolean reorderable,
GimpContainer *container)
{
g_return_if_fail (GIMP_IS_LIST_ITEM (list_item));
g_return_if_fail (! reorderable || container != NULL);
g_return_if_fail (! container || GIMP_IS_CONTAINER (container));
list_item->reorderable = reorderable ? TRUE : FALSE;;
if (reorderable)
{
list_item->container = container;
#ifdef __GNUC__
#warning make gimp_dnd_drag_dest_set_by_type() _add_by_type()
#endif
gimp_dnd_drag_dest_set_by_type (GTK_WIDGET (list_item),
GTK_DEST_DEFAULT_ALL,
container->children_type,
GDK_ACTION_MOVE | GDK_ACTION_COPY);
}
else
{
list_item->container = NULL;
gtk_drag_dest_unset (GTK_WIDGET (list_item));
}
}
void
gimp_list_item_set_convertable (GimpListItem *list_item,
gboolean convertable)
{
g_return_if_fail (GIMP_IS_LIST_ITEM (list_item));
list_item->convertable = convertable ? TRUE : FALSE;;
}
void
gimp_list_item_set_name_func (GimpListItem *list_item,
GimpItemGetNameFunc get_name_func)
{
g_return_if_fail (GIMP_IS_LIST_ITEM (list_item));
if (list_item->get_name_func != get_name_func)
{
GimpViewable *viewable;
list_item->get_name_func = get_name_func;
viewable = GIMP_PREVIEW (list_item->preview)->viewable;
if (viewable)
gimp_list_item_name_changed (viewable, list_item);
}
}
gboolean
gimp_list_item_check_drag (GimpListItem *list_item,
GdkDragContext *context,
gint x,
gint y,
GimpViewable **src_viewable,
gint *dest_index,
GdkDragAction *drag_action,
GimpDropType *drop_type)
{
GtkWidget *src_widget;
GimpViewable *my_src_viewable = NULL;
GimpViewable *my_dest_viewable = NULL;
gint my_src_index = -1;
gint my_dest_index = -1;
GdkDragAction my_drag_action = GDK_ACTION_DEFAULT;
GimpDropType my_drop_type = GIMP_DROP_NONE;
gboolean return_val = FALSE;
src_widget = gtk_drag_get_source_widget (context);
if (list_item->reorderable &&
list_item->container &&
src_widget &&
src_widget != GTK_WIDGET (list_item))
{
GimpListItem *src_list_item = NULL;
if (GIMP_IS_LIST_ITEM (src_widget))
src_list_item = GIMP_LIST_ITEM (src_widget);
my_src_viewable = gimp_dnd_get_drag_data (src_widget);
my_dest_viewable = GIMP_PREVIEW (list_item->preview)->viewable;
if (my_src_viewable &&
my_dest_viewable &&
list_item->container)
{
GimpContainer *src_container = NULL;
if (src_list_item)
src_container = src_list_item->container;
if (! src_container)
src_container = list_item->container;
my_src_index =
gimp_container_get_child_index (src_container,
GIMP_OBJECT (my_src_viewable));
my_dest_index =
gimp_container_get_child_index (list_item->container,
GIMP_OBJECT (my_dest_viewable));
if (my_src_viewable && my_src_index != -1 &&
my_dest_viewable && my_dest_index != -1)
{
if (src_container == list_item->container)
{
gint difference;
difference = my_dest_index - my_src_index;
if (y < GTK_WIDGET (list_item)->allocation.height / 2)
my_drop_type = GIMP_DROP_ABOVE;
else
my_drop_type = GIMP_DROP_BELOW;
if (difference < 0 && my_drop_type == GIMP_DROP_BELOW)
{
my_dest_index++;
}
else if (difference > 0 && my_drop_type == GIMP_DROP_ABOVE)
{
my_dest_index--;
}
if (my_src_index != my_dest_index)
{
my_drag_action = GDK_ACTION_MOVE;
return_val = TRUE;
}
else
{
my_drop_type = GIMP_DROP_NONE;
}
}
else if (src_list_item &&
src_list_item->convertable &&
src_container &&
src_container->children_type ==
list_item->container->children_type)
{
if (y < GTK_WIDGET (list_item)->allocation.height / 2)
{
my_drop_type = GIMP_DROP_ABOVE;
}
else
{
my_drop_type = GIMP_DROP_BELOW;
my_dest_index++;
}
my_drag_action = GDK_ACTION_COPY;
return_val = TRUE;
}
}
}
}
*src_viewable = my_src_viewable;
*dest_index = my_dest_index;
*drag_action = my_drag_action;
*drop_type = my_drop_type;
return return_val;
}
void
gimp_list_item_button_realize (GtkWidget *widget,
gpointer data)
{
gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
}
void
gimp_list_item_button_state_changed (GtkWidget *widget,
GtkStateType previous_state,
gpointer data)
{
GtkWidget *list_item;
list_item = GTK_WIDGET (data);
if (widget->state != list_item->state)
{
switch (widget->state)
{
case GTK_STATE_NORMAL:
case GTK_STATE_ACTIVE:
/* beware: recursion */
gtk_widget_set_state (widget, list_item->state);
break;
default:
break;
}
}
else if (list_item->state == GTK_STATE_INSENSITIVE)
{
/* Don't look here, no, please...
*
* I said NO ...
*/
if (GTK_WIDGET_DRAWABLE (list_item))
{
GdkRectangle rect;
rect.x = widget->allocation.x;
rect.y = widget->allocation.y;
rect.width = widget->allocation.width;
rect.height = widget->allocation.height;
gdk_window_invalidate_rect (list_item->window, &rect, FALSE);
gdk_window_process_updates (list_item->window, FALSE);
}
}
}
static void
gimp_list_item_name_changed (GimpViewable *viewable,
GimpListItem *list_item)
{
if (list_item->get_name_func)
{
gchar *name = NULL;
gchar *tooltip = NULL;
name = list_item->get_name_func (GTK_WIDGET (list_item), &tooltip);
gtk_label_set_text (GTK_LABEL (list_item->name_label), name);
gimp_help_set_help_data (GTK_WIDGET (list_item), tooltip, NULL);
g_free (name);
g_free (tooltip);
}
else
{
gtk_label_set_text (GTK_LABEL (list_item->name_label),
gimp_object_get_name (GIMP_OBJECT (viewable)));
}
}
static GimpViewable *
gimp_list_item_drag_viewable (GtkWidget *widget,
gpointer data)
{
return GIMP_PREVIEW (GIMP_LIST_ITEM (widget)->preview)->viewable;
}
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