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/* Dia -- an diagram creation/manipulation program
* Copyright (C) 1998 Alexander Larsson
*
* 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.
*/
/* ** \file element.h -- Definition of a diagram - usual rectangular - object with eight handles */
#ifndef ELEMENT_H
#define ELEMENT_H
#include "diatypes.h"
#include "object.h"
#include "handle.h"
#include "connectionpoint.h"
#include "boundingbox.h"
#include "properties.h" /* win32: PropNumData */
/*!
* \brief Beside OrthCon one of the most use object classes
*
* This is a subclass of DiaObject used to help implementing objects
* of a type with 8 handles.
*
* \extends _DiaObject
*/
struct _Element {
DiaObject object; /* inheritance */
Handle resize_handles[8]; /*!< not only for resizing but may also be used for connections */
Point corner; /*!< upper-left corner of the Element */
real width; /*!< width of the object (with 0 line width) */
real height; /*!< height of the object (with 0 line width) */
/*! extra data used for bounding box calculation */
ElementBBExtras extra_spacing; /*!< filled from line width */
};
/*! \protected Update internal state after property change */
void element_update_handles(Element *elem);
void element_update_connections_rectangle(Element *elem,
ConnectionPoint *cps);
void element_update_connections_directions (Element *elem,
ConnectionPoint *cps);
void element_update_boundingbox(Element *elem);
void element_init(Element *elem, int num_handles, int num_connections);
void element_destroy(Element *elem);
void element_copy(Element *from, Element *to);
ObjectChange* element_move_handle(Element *elem, HandleId id,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason,
ModifierKeys modifiers);
void element_move_handle_aspect(Element *elem, HandleId id,
Point *to, real aspect_ratio);
void element_save(Element *elem, ObjectNode obj_node, DiaContext *ctx);
void element_load(Element *elem, ObjectNode obj_node, DiaContext *ctx);
ObjectChange *element_change_new (const Point *corner,
real width, real height,
Element *elem);
void element_get_poly (const Element *elem, real angle, Point corners[4]);
/* base property stuff ... */
#ifdef G_OS_WIN32
/* see lib/properties.h for the reason */
static PropNumData width_range = { -G_MAXFLOAT, G_MAXFLOAT, 0.1};
#else
/* use extern on Linux/gcc to avoid
* warning: 'width_range' defined but not used */
extern PropNumData width_range;
#endif
#define ELEMENT_COMMON_PROPERTIES \
OBJECT_COMMON_PROPERTIES, \
{ "elem_corner", PROP_TYPE_POINT, PROP_FLAG_NO_DEFAULTS, \
"Element corner", "The corner of the element"}, \
{ "elem_width", PROP_TYPE_REAL, PROP_FLAG_DONT_MERGE | PROP_FLAG_NO_DEFAULTS | PROP_FLAG_OPTIONAL, \
"Element width", "The width of the element", &width_range}, \
{ "elem_height", PROP_TYPE_REAL, PROP_FLAG_DONT_MERGE | PROP_FLAG_NO_DEFAULTS | PROP_FLAG_OPTIONAL, \
"Element height", "The height of the element", &width_range}
/* Would like to have the frame, but need to figure out why
custom_object ext_attributes lose their updates when they're on
(see http://mail.gnome.org/archives/dia-list/2005-August/msg00053.html)
*/
/*
#define ELEMENT_COMMON_PROPERTIES \
OBJECT_COMMON_PROPERTIES, \
PROP_FRAME_BEGIN("size",0,N_("Object dimensions")), \
{ "elem_corner", PROP_TYPE_POINT, 0, \
"Element corner", "The corner of the element"}, \
{ "elem_width", PROP_TYPE_REAL, PROP_FLAG_VISIBLE, \
"Element width", "The width of the element", &width_range}, \
{ "elem_height", PROP_TYPE_REAL, PROP_FLAG_VISIBLE, \
"Element height", "The height of the element", &width_range}, \
PROP_FRAME_END("size", 0)
*/
#define ELEMENT_COMMON_PROPERTIES_OFFSETS \
OBJECT_COMMON_PROPERTIES_OFFSETS, \
{ "elem_corner", PROP_TYPE_POINT, offsetof(Element, corner) }, \
{ "elem_width", PROP_TYPE_REAL, offsetof(Element, width) }, \
{ "elem_height", PROP_TYPE_REAL, offsetof(Element, height) }
#endif /* ELEMENT_H */
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