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/*
* Copyright (c) 2002 Patrick Julien <freak@codepimps.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <tqpoint.h>
#include <tqcolor.h>
#include <tdeaction.h>
#include <kcommand.h>
#include <tdelocale.h>
#include <kdebug.h>
#include "kis_canvas_controller.h"
#include "kis_canvas_subject.h"
#include "kis_image.h"
#include "kis_layer.h"
#include "kis_strategy_move.h"
#include "kis_undo_adapter.h"
KisStrategyMove::KisStrategyMove()
{
reset(0);
}
KisStrategyMove::KisStrategyMove(KisCanvasSubject *subject)
{
reset(subject);
}
KisStrategyMove::~KisStrategyMove()
{
}
void KisStrategyMove::reset(KisCanvasSubject *subject)
{
m_subject = subject;
m_dragging = false;
if (m_subject) {
m_controller = subject->canvasController();
} else {
m_controller = 0;
}
}
void KisStrategyMove::startDrag(const TQPoint& pos)
{
// pos is the user chosen handle point
if (m_subject) {
KisImageSP img;
KisLayerSP dev;
if (!(img = m_subject->currentImg()))
return;
dev = img->activeLayer();
if (!dev || !dev->visible())
return;
m_dragging = true;
m_dragStart.setX(pos.x());
m_dragStart.setY(pos.y());
m_layerStart.setX(dev->x());
m_layerStart.setY(dev->y());
m_layerPosition = m_layerStart;
}
}
void KisStrategyMove::drag(const TQPoint& original)
{
// original is the position of the user chosen handle point
if (m_subject && m_dragging) {
KisImageSP img = m_subject->currentImg();
KisLayerSP dev;
if (img && (dev = img->activeLayer())) {
TQPoint pos = original;
TQRect rc;
pos -= m_dragStart; // convert to delta
rc = dev->extent();
dev->setX(dev->x() + pos.x());
dev->setY(dev->y() + pos.y());
rc = rc.unite(dev->extent());
m_layerPosition = TQPoint(dev->x(), dev->y());
m_dragStart = original;
dev->setDirty(rc);
}
}
}
void KisStrategyMove::endDrag(const TQPoint& pos, bool undo)
{
if (m_subject && m_dragging) {
KisImageSP img = m_subject->currentImg();
KisLayerSP dev;
if (img && (dev = img->activeLayer())) {
drag(pos);
m_dragging = false;
if (undo && img->undo()) {
KCommand *cmd = dev->moveCommand(m_layerStart, m_layerPosition);
TQ_CHECK_PTR(cmd);
KisUndoAdapter *adapter = img->undoAdapter();
if (adapter) {
adapter->addCommand(cmd);
} else {
delete cmd;
}
}
img->setModified();
}
}
}
void KisStrategyMove::simpleMove(const TQPoint& pt1, const TQPoint& pt2)
{
startDrag(pt1);
endDrag(pt2);
}
void KisStrategyMove::simpleMove(TQ_INT32 x1, TQ_INT32 y1, TQ_INT32 x2, TQ_INT32 y2)
{
startDrag(TQPoint(x1, y1));
endDrag(TQPoint(x2, y2));
}
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