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/*
* $Id: gwydataviewlayer.c 20678 2017-12-18 18:26:55Z yeti-dn $
* Copyright (C) 2003,2004 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <gtk/gtkmain.h>
#include <gtk/gtksignal.h>
#include <glib-object.h>
#include <libgwyddion/gwymacros.h>
#include "gwydataviewlayer.h"
#include "gwyvectorlayer.h"
#include "gwypixmaplayer.h"
#include "gwydataview.h"
#define BITS_PER_SAMPLE 8
enum {
PLUGGED,
UNPLUGGED,
UPDATED,
LAST_SIGNAL
};
/* Forward declarations */
static void gwy_data_view_layer_destroy (GtkObject *object);
static void gwy_data_view_layer_real_plugged (GwyDataViewLayer *layer);
static void gwy_data_view_layer_real_unplugged(GwyDataViewLayer *layer);
/* Local data */
static guint data_view_layer_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_ABSTRACT_TYPE(GwyDataViewLayer, gwy_data_view_layer, GTK_TYPE_OBJECT)
static void
gwy_data_view_layer_class_init(GwyDataViewLayerClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
GtkObjectClass *object_class = GTK_OBJECT_CLASS(klass);
object_class->destroy = gwy_data_view_layer_destroy;
klass->plugged = gwy_data_view_layer_real_plugged;
klass->unplugged = gwy_data_view_layer_real_unplugged;
/**
* GwyDataViewLayer::plugged:
* @gwydataviewlayer: The #GwyDataViewLayer which received the signal.
*
* The ::plugged signal is emitted when a #GwyDataViewLayer is plugged into
* a #GwyDataView.
**/
data_view_layer_signals[PLUGGED] =
g_signal_new("plugged",
G_OBJECT_CLASS_TYPE(gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET(GwyDataViewLayerClass, plugged),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GwyDataViewLayer::unplugged:
* @gwydataviewlayer: The #GwyDataViewLayer which received the signal.
*
* The ::unplugged signal is emitted when a #GwyDataViewLayer is removed
* from its #GwyDataView.
**/
data_view_layer_signals[UNPLUGGED] =
g_signal_new("unplugged",
G_OBJECT_CLASS_TYPE(gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET(GwyDataViewLayerClass, unplugged),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GwyDataViewLayer::updated:
* @gwydataviewlayer: The #GwyDataViewLayer which received the signal.
*
* The ::updated signal is emitted when a #GwyDataViewLayer is updated;
* the exact means how a layer can be updated depends its type.
**/
data_view_layer_signals[UPDATED] =
g_signal_new("updated",
G_OBJECT_CLASS_TYPE(gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET(GwyDataViewLayerClass, updated),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
gwy_data_view_layer_init(G_GNUC_UNUSED GwyDataViewLayer *layer)
{
}
static void
gwy_data_view_layer_destroy(GtkObject *object)
{
GwyDataViewLayer *layer;
layer = GWY_DATA_VIEW_LAYER(object);
GWY_OBJECT_UNREF(layer->data);
GTK_OBJECT_CLASS(gwy_data_view_layer_parent_class)->destroy(object);
}
/**
* gwy_data_view_layer_plugged:
* @layer: A data view layer.
*
* Emits a "plugged" singal on a layer.
*
* Primarily intended for #GwyDataView implementation.
**/
void
gwy_data_view_layer_plugged(GwyDataViewLayer *layer)
{
gwy_debug("");
g_return_if_fail(GWY_IS_DATA_VIEW_LAYER(layer));
g_signal_emit(layer, data_view_layer_signals[PLUGGED], 0);
}
/**
* gwy_data_view_layer_unplugged:
* @layer: A data view layer.
*
* Emits a "unplugged" singal on a layer.
*
* Primarily intended for #GwyDataView implementation.
**/
void
gwy_data_view_layer_unplugged(GwyDataViewLayer *layer)
{
gwy_debug("");
g_return_if_fail(GWY_IS_DATA_VIEW_LAYER(layer));
g_signal_emit(layer, data_view_layer_signals[UNPLUGGED], 0);
}
/**
* gwy_data_view_layer_updated:
* @layer: A data view layer.
*
* Emits a "updated" singal on a layer.
**/
void
gwy_data_view_layer_updated(GwyDataViewLayer *layer)
{
gwy_debug("");
g_return_if_fail(GWY_IS_DATA_VIEW_LAYER(layer));
g_signal_emit(layer, data_view_layer_signals[UPDATED], 0);
}
/**
* gwy_data_view_layer_realize:
* @layer: A data view layer.
*
* Tells a data view layer its parent was realized and it can create
* display-specific resources.
**/
void
gwy_data_view_layer_realize(GwyDataViewLayer *layer)
{
void (*method)(GwyDataViewLayer*);
gwy_debug("");
g_return_if_fail(GWY_IS_DATA_VIEW_LAYER(layer));
method = GWY_DATA_VIEW_LAYER_GET_CLASS(layer)->realize;
if (method)
method(layer);
}
/**
* gwy_data_view_layer_unrealize:
* @layer: A data view layer.
*
* Tells a data view layer its parent was unrealized and it should destroy
* display-specific resources.
**/
void
gwy_data_view_layer_unrealize(GwyDataViewLayer *layer)
{
void (*method)(GwyDataViewLayer*);
gwy_debug("");
g_return_if_fail(GWY_IS_DATA_VIEW_LAYER(layer));
method = GWY_DATA_VIEW_LAYER_GET_CLASS(layer)->unrealize;
if (method)
method(layer);
}
static void
gwy_data_view_layer_real_plugged(GwyDataViewLayer *layer)
{
GwyContainer *data;
gwy_debug("");
GWY_OBJECT_UNREF(layer->data);
data = gwy_data_view_get_data(GWY_DATA_VIEW(layer->parent));
g_return_if_fail(GWY_IS_CONTAINER(data));
g_object_ref(data);
layer->data = data;
}
static void
gwy_data_view_layer_real_unplugged(GwyDataViewLayer *layer)
{
gwy_debug("");
GWY_OBJECT_UNREF(layer->data);
}
/************************** Documentation ****************************/
/**
* SECTION:gwydataviewlayer
* @title: GwyDataViewLayer
* @short_description: Layer GwyDataView is composed of
* @see_also: #GwyDataView -- data display widget,
* <link linkend="libgwydraw-gwypixfield">gwypixfield</link> --
* low level functions for painting data fields,
*
* #GwyDataViewLayer's are parts of #GwyDataView. They are not widgets and
* they are not normally usable outside of a data view. The perform a specific
* visualization task: drawing the data, drawing mask, or drawing selection.
**/
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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