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/* This file is part of the KDE project
* Copyright (C) 2006-2007 Thomas Zander <zander@kde.org>
* Copyright (C) 2007-2008 Jan Hambrecht <jaham@gmx.net>
*
* 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
* along 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.
*/
#include "ShapeRotateStrategy.h"
#include "SelectionDecorator.h"
#include "SelectionTransformCommand.h"
#include <KoInteractionTool.h>
#include <KoCanvasBase.h>
#include <KoSelection.h>
#include <KoPointerEvent.h>
#include <KoShapeManager.h>
#include <KoResourceManager.h>
#include <commands/KoShapeTransformCommand.h>
#include <QPointF>
#include <math.h>
#include <klocale.h>
ShapeRotateStrategy::ShapeRotateStrategy(KoToolBase *tool, const QPointF &clicked, Qt::MouseButtons buttons)
: KoInteractionStrategy(tool)
, m_initialBoundingRect()
, m_start(clicked)
{
m_initialSelectionMatrix = tool->canvas()->shapeManager()->selection()->transformation();
QList<KoShape*> selectedShapes = tool->canvas()->shapeManager()->selection()->selectedShapes(KoFlake::StrippedSelection);
foreach(KoShape *shape, selectedShapes) {
if( ! shape->isEditable() )
continue;
m_selectedShapes << shape;
if( m_selectedShapes.count() == 1 )
m_initialBoundingRect = shape->boundingRect();
else
m_initialBoundingRect = m_initialBoundingRect.united( shape->boundingRect() );
m_oldTransforms << shape->transformation();
}
if( buttons & Qt::RightButton )
m_rotationCenter = tool->canvas()->shapeManager()->selection()->absolutePosition( SelectionDecorator::hotPosition() );
else
m_rotationCenter = m_initialBoundingRect.center();
tool->setStatusText( i18n( "Press ALT to rotate in 45 degree steps." ) );
}
void ShapeRotateStrategy::handleMouseMove(const QPointF &point, Qt::KeyboardModifiers modifiers) {
qreal angle = atan2( point.y() - m_rotationCenter.y(), point.x() - m_rotationCenter.x() ) -
atan2( m_start.y() - m_rotationCenter.y(), m_start.x() - m_rotationCenter.x() );
angle = angle / M_PI * 180; // convert to degrees.
if(modifiers & (Qt::AltModifier | Qt::ControlModifier)) {
// limit to 45 degree angles
qreal modula = qAbs(angle);
while(modula > 45.0)
modula -= 45.0;
if(modula > 22.5)
modula -= 45.0;
angle += (angle>0?-1:1)*modula;
}
QMatrix matrix;
matrix.translate(m_rotationCenter.x(), m_rotationCenter.y());
matrix.rotate(angle);
matrix.translate(-m_rotationCenter.x(), -m_rotationCenter.y());
QMatrix applyMatrix = matrix * m_rotationMatrix.inverted();
m_rotationMatrix = matrix;
foreach( KoShape * shape, m_selectedShapes ) {
shape->update();
shape->applyAbsoluteTransformation( applyMatrix );
shape->update();
}
tool()->canvas()->shapeManager()->selection()->applyAbsoluteTransformation( applyMatrix );
}
void ShapeRotateStrategy::handleCustomEvent( KoPointerEvent * event )
{
QMatrix matrix;
matrix.translate(m_rotationCenter.x(), m_rotationCenter.y());
matrix.rotate( 0.1 * event->rotationZ() );
matrix.translate(-m_rotationCenter.x(), -m_rotationCenter.y());
m_rotationMatrix *= matrix;
foreach( KoShape * shape, m_selectedShapes ) {
shape->update();
shape->applyAbsoluteTransformation( matrix );
shape->update();
}
tool()->canvas()->shapeManager()->selection()->applyAbsoluteTransformation( matrix );
}
void ShapeRotateStrategy::rotateBy( qreal angle )
{
QMatrix matrix;
matrix.translate(m_rotationCenter.x(), m_rotationCenter.y());
matrix.rotate(angle);
matrix.translate(-m_rotationCenter.x(), -m_rotationCenter.y());
QMatrix applyMatrix = matrix * m_rotationMatrix.inverted();
m_rotationMatrix = matrix;
foreach( KoShape * shape, m_selectedShapes ) {
shape->update();
shape->applyAbsoluteTransformation( applyMatrix );
shape->update();
}
tool()->canvas()->shapeManager()->selection()->applyAbsoluteTransformation( applyMatrix );
}
void ShapeRotateStrategy::paint( QPainter &painter, const KoViewConverter &converter) {
SelectionDecorator decorator(KoFlake::NoHandle, true, false);
decorator.setSelection(tool()->canvas()->shapeManager()->selection());
decorator.setHandleRadius( tool()->canvas()->resourceManager()->handleRadius() );
decorator.paint(painter, converter);
// paint the rotation center
painter.setPen( QPen(Qt::red));
painter.setBrush( QBrush(Qt::red));
painter.setRenderHint( QPainter::Antialiasing, true );
QRectF circle( 0, 0, 5, 5 );
circle.moveCenter( converter.documentToView( m_rotationCenter ) );
painter.drawEllipse( circle );
}
QUndoCommand* ShapeRotateStrategy::createCommand() {
QList<QMatrix> newTransforms;
foreach( KoShape* shape, m_selectedShapes )
newTransforms << shape->transformation();
KoShapeTransformCommand * cmd = new KoShapeTransformCommand( m_selectedShapes, m_oldTransforms, newTransforms );
cmd->setText( i18n("Rotate") );
KoSelection * sel = tool()->canvas()->shapeManager()->selection();
new SelectionTransformCommand(sel, m_initialSelectionMatrix, sel->transformation(), cmd);
return cmd;
}
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