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koffice/karbon/tools/vpolylinetool.cc

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/* This file is part of the KDE project
Copyright (C) 2001, 2002, 2003 The Karbon Developers
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 <tqcursor.h>
#include <tqevent.h>
#include <tqlabel.h>
#include <klocale.h>
#include <karbon_part.h>
#include <karbon_view.h>
#include <core/vcolor.h>
#include <core/vcomposite.h>
#include <core/vfill.h>
#include <core/vstroke.h>
#include <core/vglobal.h>
#include <core/vcursor.h>
#include <render/vpainter.h>
#include <render/vpainterfactory.h>
#include "vpolylinetool.h"
#include <commands/vshapecmd.h>
#include <commands/vcommand.h>
#include <widgets/vcanvas.h>
VPolylineTool::VPolylineTool( KarbonView *view )
: VTool( view, "tool_polyline" )
{
m_bezierPoints.setAutoDelete( true );
registerTool( this );
m_crossCursor = new TQCursor( VCursor::createCursor( VCursor::CrossHair ) );
}
VPolylineTool::~VPolylineTool()
{
delete m_crossCursor;
}
TQString
VPolylineTool::contextHelp()
{
TQString s = i18n( "<qt><b>Polyline tool:</b><br>" );
s += i18n( "- <i>Click</i> to add a node and <i>drag</i> to set its bezier vector.<br>" );
s += i18n( "- Press <i>Ctrl</i> while dragging to edit the previous bezier vector.<br>" );
s += i18n( "- Press <i>Shift</i> while dragging to change the curve in a straight line.<br>" );
s += i18n( "- Press <i>Backspace</i> to cancel the last curve.<br>" );
s += i18n( "- Press <i>Esc</i> to cancel the whole polyline.<br>" );
s += i18n( "- Press <i>Enter</i> or <i>double click</i> to end the polyline.</qt>" );
return s;
}
void
VPolylineTool::activate()
{
VTool::activate();
view()->statusMessage()->setText( i18n( "Polyline Tool" ) );
view()->setCursor( *m_crossCursor );
m_bezierPoints.clear();
m_close = false;
connect( view()->part()->commandHistory(), TQT_SIGNAL(commandExecuted()), this, TQT_SLOT(commandExecuted()) );
}
void
VPolylineTool::initializePath( VPath &path )
{
KoPoint* p1 = m_bezierPoints.first();
KoPoint* p2;
KoPoint* p3;
KoPoint* p4;
path.moveTo( *p1 );
while(
( p2 = m_bezierPoints.next() ) &&
( p3 = m_bezierPoints.next() ) &&
( p4 = m_bezierPoints.next() ) )
{
if ( *p1 == *p2 )
if ( *p3 == *p4 )
path.lineTo( *p4 );
else
//polyline->curve1To( *p3, *p4 );
path.curveTo( *p3, *p4, *p4 );
else
if ( *p3 == *p4 )
//polyline->curve2To( *p2, *p4 );
path.curveTo( *p2, *p2, *p4 );
else
path.curveTo( *p2, *p3, *p4 );
p1 = p4;
}
}
void
VPolylineTool::createObject()
{
VPath* polyline = 0L;
if( m_bezierPoints.count() > 2 )
{
polyline = new VPath( 0L );
if( polyline )
{
initializePath( *polyline );
if( m_close )
polyline->close();
VShapeCmd* cmd = new VShapeCmd(
&view()->part()->document(),
i18n( "Polyline" ),
polyline,
"14_polyline" );
view()->part()->addCommand( cmd, true );
}
}
m_bezierPoints.clear();
m_close = false;
}
void
VPolylineTool::deactivate()
{
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
createObject();
disconnect( view()->part()->commandHistory(), TQT_SIGNAL(commandExecuted()), this, TQT_SLOT(commandExecuted()) );
}
void
VPolylineTool::draw()
{
VPainter* painter = view()->painterFactory()->editpainter();
painter->setRasterOp( TQt::NotROP );
if( m_bezierPoints.count() > 2 )
{
VPath polyline( 0L );
initializePath( polyline );
polyline.setState( VObject::edit );
polyline.draw( painter, &polyline.boundingBox() );
}
}
void
VPolylineTool::drawBezierVector( KoPoint& start, KoPoint& end )
{
VPainter* painter = view()->painterFactory()->editpainter();
painter->save();
float zoomFactor = view()->zoom();
painter->setRasterOp( TQt::NotROP );
painter->newPath();
/* VStroke stroke( TQt::blue, 0L, 1.0 );
TQValueList<float> array;
array << 2.0 << 3.0;
stroke.dashPattern().setArray( array );*/
painter->setPen( TQt::DotLine /*stroke*/ );
painter->setBrush( TQt::NoBrush );
painter->moveTo( start );
painter->lineTo( end );
painter->strokePath();
painter->setRasterOp( TQt::XorROP );
painter->newPath();
painter->setPen( TQt::yellow );
float width = 2.0;
painter->moveTo( KoPoint(
end.x() - width / zoomFactor,
end.y() - width / zoomFactor ) );
painter->lineTo( KoPoint(
end.x() + width / zoomFactor,
end.y() - width / zoomFactor ) );
painter->lineTo( KoPoint(
end.x() + width / zoomFactor,
end.y() + width / zoomFactor ) );
painter->lineTo( KoPoint(
end.x() - width / zoomFactor,
end.y() + width / zoomFactor ) );
painter->lineTo( KoPoint(
end.x() - width / zoomFactor,
end.y() - width / zoomFactor ) );
painter->strokePath();
painter->restore();
}
void
VPolylineTool::mouseMove()
{
if( m_bezierPoints.count() != 0 )
{
KoPoint _last = view()->canvasWidget()->snapToGrid( last() );
draw();
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( _last ) );
draw();
}
}
void
VPolylineTool::mouseButtonPress()
{
KoPoint _last = view()->canvasWidget()->snapToGrid( last() );
if( m_bezierPoints.count() != 0 )
{
draw();
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( _last ) );
}
m_lastVectorEnd = m_lastVectorStart = _last;
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( _last ) );
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
draw();
}
void
VPolylineTool::mouseButtonRelease()
{
KoPoint _last = view()->canvasWidget()->snapToGrid( last() );
if( m_bezierPoints.count() == 2 )
{
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( _last ) );
VPainter* painter = view()->painterFactory()->editpainter();
painter->save();
painter->setZoomFactor( view()->zoom() );
painter->setRasterOp( TQt::XorROP );
VStroke stroke( TQt::yellow, 0L, 1.0 );
painter->setPen( stroke );
painter->setBrush( TQt::yellow );
painter->newPath();
painter->drawNode( m_lastVectorStart, 2 );
painter->strokePath();
painter->restore();
}
else
{
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
draw();
m_bezierPoints.removeLast();
KoPoint* p = new KoPoint( *m_bezierPoints.last() );
m_bezierPoints.removeLast();
KoPoint* b = new KoPoint( *m_bezierPoints.last() );
m_bezierPoints.removeLast();
if( shiftPressed() )
{
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( *m_bezierPoints.last() ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_lastVectorStart = m_lastVectorEnd = *p;
}
else if( ctrlPressed() )
{
m_bezierPoints.removeLast();
m_lastVectorStart = *m_bezierPoints.last();
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( *b ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p - ( *b - *p ) ) );
m_lastVectorEnd = _last;
}
else
{
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p - ( _last - *p ) ) );
m_lastVectorStart = *p;
m_lastVectorEnd = _last;
}
if( m_bezierPoints.count() > 2 && p->isNear( *m_bezierPoints.first(), 3 ) )
{
m_bezierPoints.append( new KoPoint( _last ) );
m_close = true;
createObject();
return;
}
}
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( _last ) );
draw();
}
void
VPolylineTool::rightMouseButtonRelease()
{
// end line without adding new points
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
createObject();
}
void
VPolylineTool::mouseButtonDblClick()
{
createObject();
}
void
VPolylineTool::mouseDrag()
{
KoPoint _last = view()->canvasWidget()->snapToGrid( last() );
if( m_bezierPoints.count() == 2 )
{
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( _last ) );
m_lastVectorEnd = _last;
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
}
else
{
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
draw();
m_bezierPoints.removeLast();
KoPoint* p = new KoPoint( *m_bezierPoints.last() );
m_bezierPoints.removeLast();
KoPoint* b = new KoPoint( *m_bezierPoints.last() );
m_bezierPoints.removeLast();
if( shiftPressed() )
{
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( *m_bezierPoints.last() ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_lastVectorStart = m_lastVectorEnd = *p;
}
else if( ctrlPressed() )
{
m_bezierPoints.removeLast();
m_lastVectorStart = *m_bezierPoints.last();
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( *b ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p - ( *b - *p ) ) );
m_lastVectorEnd = _last;
}
else
{
m_bezierPoints.append( new KoPoint( _last ) );
m_bezierPoints.append( new KoPoint( *p ) );
m_bezierPoints.append( new KoPoint( *p - ( _last - *p ) ) );
m_lastVectorStart = *p;
m_lastVectorEnd = _last;
}
draw();
drawBezierVector( m_lastVectorStart, m_lastVectorEnd );
}
}
void
VPolylineTool::mouseDragRelease()
{
mouseButtonRelease();
}
void
VPolylineTool::mouseDragShiftPressed()
{
}
void
VPolylineTool::mouseDragCtrlPressed()
{
// Moves the mouse to the other bezier vector position.
if( m_bezierPoints.count() > 3 )
{
KoPoint p;
p = *m_bezierPoints.at( m_bezierPoints.count() - 4) - *m_bezierPoints.at( m_bezierPoints.count() - 3 );
view()->setPos( p );
}
}
void
VPolylineTool::mouseDragShiftReleased()
{
}
void
VPolylineTool::mouseDragCtrlReleased()
{
if( m_bezierPoints.count() > 3 )
{
KoPoint p;
p = *m_bezierPoints.at( m_bezierPoints.count() - 3) - *m_bezierPoints.at( m_bezierPoints.count() - 4 );
view()->setPos( p );
}
}
void
VPolylineTool::cancel()
{
draw();
m_bezierPoints.clear();
}
void
VPolylineTool::cancelStep()
{
draw();
if ( m_bezierPoints.count() > 6 )
{
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
KoPoint p1 = *m_bezierPoints.last();
m_bezierPoints.removeLast();
m_bezierPoints.removeLast();
m_bezierPoints.append( new KoPoint( p1 ) );
m_bezierPoints.append( new KoPoint( p1 ) );
view()->setPos( p1 );
}
else
{
m_bezierPoints.clear();
}
draw();
}
void
VPolylineTool::accept()
{
activate();
}
void
VPolylineTool::setup( KActionCollection *collection )
{
m_action = static_cast<KRadioAction *>(collection -> action( name() ) );
if( m_action == 0 )
{
KShortcut shortcut( TQt::Key_Plus );
shortcut.append( KShortcut( TQt::Key_F9 ) );
m_action = new KRadioAction( i18n( "Polyline Tool" ), "14_polyline", shortcut, this, TQT_SLOT( activate() ), collection, name() );
m_action->setToolTip( i18n( "Polyline" ) );
m_action->setExclusiveGroup( "freehand" );
//m_ownAction = true;
}
}
void
VPolylineTool::commandExecuted()
{
cancel();
}
#include "vpolylinetool.moc"