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/*
Copyright (C) 2003 KSVG Team
This file is part of the KDE project
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aint with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef CANVASITEM_H
#define CANVASITEM_H
#include <qrect.h>
#include <qpoint.h>
#include <qvaluelist.h>
#define CHUNK_SIZE_HORIZONTAL 32
#define CHUNK_SIZE_VERTICAL 32
namespace KSVG
{
class SVGElementImpl;
enum RenderContext
{
/* NONE = for initializing */
NONE = 0,
/* NORMAL = use baseVal()'s for calculation, and fillRule */
NORMAL = 1,
/* CLIPPING = use baseVal()'s for calculation, and clipRule */
CLIPPING = 2,
/* ANIMATION = use animVal()'s for calculation, and fillRule */
ANIMATION = 4
};
enum CanvasItemUpdate
{
UPDATE_STYLE,
UPDATE_LINEWIDTH,
UPDATE_TRANSFORM,
UPDATE_ZOOM,
UPDATE_PAN
};
class CanvasItem
{
public:
CanvasItem() { m_zIndex = 0; m_referenced = false; }
virtual ~CanvasItem() { }
virtual QRect bbox() const = 0;
virtual bool fillContains(const QPoint &) = 0;
virtual bool strokeContains(const QPoint &) = 0;
virtual void update(CanvasItemUpdate reason, int param1 = 0, int param2 = 0) = 0;
virtual void draw() = 0;
virtual bool isVisible() = 0;
void setZIndex(unsigned int zIndex) { m_zIndex = zIndex; }
unsigned int zIndex() const { return m_zIndex; }
void setReferenced(bool referenced) { m_referenced = referenced; }
bool referenced() const { return m_referenced; }
virtual SVGElementImpl *element() const { return 0; }
protected:
unsigned int m_zIndex;
bool m_referenced;
};
class CanvasItemPtr
{
public:
CanvasItemPtr() : ptr(0) { }
CanvasItemPtr(CanvasItem *p) : ptr(p) { }
bool operator<=(const CanvasItemPtr& that) const
{
// Order same-z objects by identity.
if(that.ptr->zIndex() == ptr->zIndex())
return that.ptr >= ptr;
return that.ptr->zIndex() >= ptr->zIndex();
}
bool operator<(const CanvasItemPtr& that) const
{
// Order same-z objects by identity.
if(that.ptr->zIndex() == ptr->zIndex())
return that.ptr > ptr;
return that.ptr->zIndex() > ptr->zIndex();
}
bool operator>(const CanvasItemPtr& that) const
{
// Order same-z objects by identity.
if(that.ptr->zIndex() == ptr->zIndex())
return that.ptr < ptr;
return that.ptr->zIndex() < ptr->zIndex();
}
bool operator==(const CanvasItemPtr& that) const { return that.ptr == ptr; }
operator CanvasItem *() const { return ptr; }
private:
CanvasItem *ptr;
};
class CanvasItemList : public QValueList<CanvasItem *>
{
public:
void sort() { qHeapSort(*((QValueList<CanvasItemPtr> *) this)); }
};
class CanvasChunk
{
public:
CanvasChunk(short x, short y) : m_x(x), m_y(y), m_dirty(false) { }
void sort() { m_list.sort(); }
const CanvasItemList &list() const { return m_list; }
void add(CanvasItem *item) { m_list.prepend(item); m_dirty = true; }
void remove(CanvasItem *item) { m_list.remove(item); m_dirty = true; }
void setDirty() { m_dirty = true; }
bool unsetDirty() { bool y = m_dirty; m_dirty = false; return y; }
bool isDirty() const { return m_dirty; }
short x() const { return m_x; }
short y() const { return m_y; }
QRect bbox() const { return QRect(m_x * CHUNK_SIZE_HORIZONTAL, m_y * CHUNK_SIZE_VERTICAL, CHUNK_SIZE_HORIZONTAL, CHUNK_SIZE_VERTICAL); }
private:
CanvasItemList m_list;
short m_x;
short m_y;
bool m_dirty : 1;
};
}
#endif
// vim:ts=4:noet
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