394 lines
10 KiB
C
394 lines
10 KiB
C
/*
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* Copyright (C) 2010 Daiki Ueno <ueno@unixuser.org>
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* Copyright (C) 2010 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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/**
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* SECTION:eek-element
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* @short_description: Base class of a keyboard element
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*
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* The #EekElementClass class represents a keyboard element, which
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* shall be used to implement #EekKeyboard, #EekSection, or #EekKey.
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*/
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include "eek-element.h"
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#include "eek-container.h"
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enum {
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PROP_0,
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PROP_NAME,
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PROP_BOUNDS,
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PROP_LAST
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};
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G_DEFINE_ABSTRACT_TYPE (EekElement, eek_element, G_TYPE_OBJECT);
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#define EEK_ELEMENT_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), EEK_TYPE_ELEMENT, EekElementPrivate))
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struct _EekElementPrivate
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{
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gchar *name;
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EekBounds bounds;
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EekElement *parent;
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};
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static void
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eek_element_real_set_parent (EekElement *self,
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EekElement *parent)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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if (!parent) {
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g_return_if_fail (priv->parent);
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/* release self-reference acquired when setting parent */
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g_object_unref (self);
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priv->parent = NULL;
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} else {
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g_return_if_fail (!priv->parent);
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g_object_ref (self);
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priv->parent = parent;
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}
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}
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static EekElement *
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eek_element_real_get_parent (EekElement *self)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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return priv->parent;
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}
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static void
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eek_element_real_set_name (EekElement *self,
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const gchar *name)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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g_free (priv->name);
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priv->name = g_strdup (name);
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g_object_notify (G_OBJECT(self), "name");
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}
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static G_CONST_RETURN gchar *
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eek_element_real_get_name (EekElement *self)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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return priv->name;
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}
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static void
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eek_element_real_set_bounds (EekElement *self,
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EekBounds *bounds)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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priv->bounds = *bounds;
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}
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static void
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eek_element_real_get_bounds (EekElement *self,
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EekBounds *bounds)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(self);
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g_return_if_fail (bounds);
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*bounds = priv->bounds;
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g_object_notify (G_OBJECT(self), "bounds");
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}
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static void
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eek_element_finalize (GObject *object)
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{
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EekElementPrivate *priv = EEK_ELEMENT_GET_PRIVATE(object);
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g_free (priv->name);
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}
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static void
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eek_element_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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switch (prop_id) {
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case PROP_NAME:
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eek_element_set_name (EEK_ELEMENT(object),
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g_value_get_string (value));
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break;
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case PROP_BOUNDS:
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eek_element_set_bounds (EEK_ELEMENT(object),
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g_value_get_boxed (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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eek_element_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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EekBounds bounds;
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switch (prop_id) {
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case PROP_NAME:
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g_value_set_string (value, eek_element_get_name (EEK_ELEMENT(object)));
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break;
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case PROP_BOUNDS:
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eek_element_get_bounds (EEK_ELEMENT(object), &bounds);
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g_value_set_boxed (value, &bounds);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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eek_element_class_init (EekElementClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GParamSpec *pspec;
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g_type_class_add_private (gobject_class,
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sizeof (EekElementPrivate));
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klass->set_parent = eek_element_real_set_parent;
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klass->get_parent = eek_element_real_get_parent;
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klass->set_name = eek_element_real_set_name;
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klass->get_name = eek_element_real_get_name;
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klass->set_bounds = eek_element_real_set_bounds;
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klass->get_bounds = eek_element_real_get_bounds;
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gobject_class->set_property = eek_element_set_property;
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gobject_class->get_property = eek_element_get_property;
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gobject_class->finalize = eek_element_finalize;
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/**
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* EekElement:name:
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*
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* The name of #EekElement.
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*/
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pspec = g_param_spec_string ("name",
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"Name",
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"Name",
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NULL,
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G_PARAM_READWRITE);
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g_object_class_install_property (gobject_class,
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PROP_NAME,
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pspec);
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/**
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* EekElement:bounds:
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*
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* The bounding box of #EekElement.
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*/
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pspec = g_param_spec_boxed ("bounds",
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"Bounds",
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"Bounding box of the element",
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EEK_TYPE_BOUNDS,
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G_PARAM_READWRITE);
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g_object_class_install_property (gobject_class,
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PROP_BOUNDS,
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pspec);
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}
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static void
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eek_element_init (EekElement *self)
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{
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EekElementPrivate *priv;
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priv = self->priv = EEK_ELEMENT_GET_PRIVATE(self);
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priv->name = NULL;
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memset (&priv->bounds, 0, sizeof priv->bounds);
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}
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/**
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* eek_element_set_parent:
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* @element: an #EekElement
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* @parent: an #EekElement
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*
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* Set the parent of @element to @parent.
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*/
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void
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eek_element_set_parent (EekElement *element,
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EekElement *parent)
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{
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g_return_if_fail (EEK_IS_ELEMENT(element));
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g_return_if_fail (EEK_IS_ELEMENT(parent));
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EEK_ELEMENT_GET_CLASS(element)->set_parent (element, parent);
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}
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/**
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* eek_element_get_parent:
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* @element: an #EekElement
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*
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* Get the parent of @element.
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* Returns: an #EekElement if the parent is set
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*/
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EekElement *
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eek_element_get_parent (EekElement *element)
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{
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g_return_val_if_fail (EEK_IS_ELEMENT(element), NULL);
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return EEK_ELEMENT_GET_CLASS(element)->get_parent (element);
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}
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/**
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* eek_element_set_name:
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* @element: an #EekElement
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* @name: name of @element
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*
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* Set the name of @element to @name.
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*/
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void
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eek_element_set_name (EekElement *element,
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const gchar *name)
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{
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g_return_if_fail (EEK_IS_ELEMENT(element));
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EEK_ELEMENT_GET_CLASS(element)->set_name (element, name);
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}
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/**
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* eek_element_get_name:
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* @element: an #EekElement
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*
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* Get the name of @element.
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* Returns: the name of @element or NULL when the name is not set
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*/
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G_CONST_RETURN gchar *
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eek_element_get_name (EekElement *element)
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{
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g_return_val_if_fail (EEK_IS_ELEMENT(element), NULL);
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return EEK_ELEMENT_GET_CLASS(element)->get_name (element);
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}
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/**
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* eek_element_set_bounds:
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* @element: an #EekElement
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* @bounds: bounding box of @element
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*
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* Set the bounding box of @element to @bounds. Note that if @element
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* has parent, X and Y positions of @bounds are relative to the parent
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* position.
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*/
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void
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eek_element_set_bounds (EekElement *element,
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EekBounds *bounds)
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{
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g_return_if_fail (EEK_IS_ELEMENT(element));
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EEK_ELEMENT_GET_CLASS(element)->set_bounds (element, bounds);
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}
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/**
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* eek_element_get_bounds:
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* @element: an #EekElement
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* @bounds: pointer where bounding box of @element will be stored
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*
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* Get the bounding box of @element. Note that if @element has
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* parent, position of @bounds are relative to the parent. To obtain
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* the absolute position, use eek_element_get_absolute_position().
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*/
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void
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eek_element_get_bounds (EekElement *element,
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EekBounds *bounds)
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{
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g_return_if_fail (EEK_IS_ELEMENT(element));
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EEK_ELEMENT_GET_CLASS(element)->get_bounds (element, bounds);
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}
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/**
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* eek_element_get_absolute_position:
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* @element: an #EekElement
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* @x: pointer where the X coordinate of @element will be stored
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* @y: pointer where the Y coordinate of @element will be stored
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*
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* Compute the absolute position of @element.
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*/
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void
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eek_element_get_absolute_position (EekElement *element,
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gdouble *x,
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gdouble *y)
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{
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EekBounds bounds;
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gdouble ax = 0.0, ay = 0.0;
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do {
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eek_element_get_bounds (element, &bounds);
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ax += bounds.x;
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ay += bounds.y;
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} while ((element = eek_element_get_parent (element)) != NULL);
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*x = ax;
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*y = ay;
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}
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/**
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* eek_element_set_position:
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* @element: an #EekElement
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* @x: X coordinate of top left corner
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* @y: Y coordinate of top left corner
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*
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* Set the relative position of @element.
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*/
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void
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eek_element_set_position (EekElement *element,
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gdouble x,
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gdouble y)
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{
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EekBounds bounds;
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eek_element_get_bounds (element, &bounds);
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bounds.x = x;
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bounds.y = y;
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eek_element_set_bounds (element, &bounds);
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}
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/**
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* eek_element_set_size:
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* @element: an #EekElement
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* @width: width of @element
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* @height: height of @element
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*
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* Set the size of @element.
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*/
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void
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eek_element_set_size (EekElement *element,
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gdouble width,
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gdouble height)
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{
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EekBounds bounds;
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eek_element_get_bounds (element, &bounds);
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bounds.width = width;
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bounds.height = height;
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eek_element_set_bounds (element, &bounds);
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}
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