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/* This file is part of the KDE project
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Copyright (C) 2001, 2002, 2003 The Karbon Developers
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <tqcursor.h>
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#include <tqpainter.h>
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#include <tqpixmap.h>
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#include "karbon_view.h"
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#include "karbon_part.h"
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#include "karbon_drag.h"
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#include "vcanvas.h"
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#include "vdocument.h"
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#include "vpainter.h"
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#include "vqpainter.h"
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#include "vpainterfactory.h"
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#include "vselection.h"
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#include "vtoolcontroller.h"
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#include "vtool.h"
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#include <kdebug.h>
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#include <tdelocale.h>
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#include <kcolordrag.h>
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int
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VCanvas::pageOffsetX() const
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{
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double zoomedWidth = m_part->document().width() * m_view->zoom();
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if( contentsWidth() < visibleWidth() )
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return int( 0.5 * ( visibleWidth() - zoomedWidth ) );
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else
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return int( 0.5 * ( contentsWidth() - zoomedWidth ) );
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}
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int
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VCanvas::pageOffsetY() const
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{
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double zoomedHeight = m_part->document().height() * m_view->zoom();
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if( contentsHeight() < visibleHeight() )
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return int( 0.5 * ( visibleHeight() - zoomedHeight ) );
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else
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return int( 0.5 * ( contentsHeight() - zoomedHeight ) );
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}
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KoPoint VCanvas::snapToGrid( const KoPoint &point )
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{
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if( !m_part->document().grid().isSnap )
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return point;
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KoPoint p = point;
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KoSize dist = m_part->document().grid().snap;
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KoSize dxy = m_part->document().grid().freq;
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int dx = tqRound( p.x() / dxy.width() );
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int dy = tqRound( p.y() / dxy.height() );
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float distx = TQMIN( TQABS( p.x() - dxy.width() * dx ), TQABS( p.x() - dxy.width() * ( dx + 1 ) ) );
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float disty = TQMIN( TQABS( p.y() - dxy.height() * dy ), TQABS( p.y() - dxy.height() * ( dy + 1 ) ) );
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if( distx < dist.width() )
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{
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if( TQABS(p.x() - dxy.width() * dx ) < TQABS( p.x() - dxy.width() * ( dx + 1 ) ) )
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p.rx() = dxy.width() * dx;
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else
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p.rx() = dxy.width() * ( dx + 1 );
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}
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if( disty < dist.height() )
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{
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if( TQABS( p.y() - dxy.height() * dy ) < TQABS( p.y() - dxy.height() * ( dy + 1 ) ) )
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p.ry() = dxy.height() * dy;
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else
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p.ry() = dxy.height() * ( dy + 1 );
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}
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return p;
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}
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VCanvas::VCanvas( TQWidget *parent, KarbonView* view, KarbonPart* part )
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: TQScrollView( parent, "canvas", WStaticContents/*WNorthWestGravity*/ | WResizeNoErase |
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WRepaintNoErase ), m_part( part ), m_view( view )
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{
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connect(this, TQT_SIGNAL( contentsMoving( int, int ) ), this, TQT_SLOT( slotContentsMoving( int, int ) ) );
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viewport()->setFocusPolicy( TQ_StrongFocus );
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viewport()->setMouseTracking( true );
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setMouseTracking( true );
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viewport()->setBackgroundColor( TQt::white );
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viewport()->setBackgroundMode( TQWidget::NoBackground );
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viewport()->installEventFilter( this );
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resizeContents( 800, 600 );
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m_pixmap = new TQPixmap( 800, 600 );
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setFocus();
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setAcceptDrops( true );
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}
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VCanvas::~VCanvas()
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{
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delete m_pixmap;
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m_view = 0L;
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m_part = 0L;
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}
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void
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VCanvas::setPos( const KoPoint& p )
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{
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KoPoint p2 = toViewport( p );
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TQCursor::setPos( mapToGlobal( TQPoint( int(p2.x()), int(p2.y()) ) ) );
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}
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bool
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VCanvas::eventFilter( TQObject* object, TQEvent* event )
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{
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TQScrollView::eventFilter( object, event );
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if( event->type() == TQEvent::AccelOverride || event->type() == TQEvent::Accel )
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return TQScrollView::eventFilter( object, event );
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if( event->type() == TQEvent::KeyPress || event->type() == TQEvent::KeyRelease )
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return m_view->keyEvent( event );
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TQMouseEvent* mouseEvent = dynamic_cast<TQMouseEvent*>( event );
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if( mouseEvent && m_view )
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{
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KoPoint canvasCoordinate = toContents( KoPoint( mouseEvent->pos() ) );
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return m_view->mouseEvent( mouseEvent, canvasCoordinate );
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}
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return false;
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}
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// This causes a repaint normally, so just overwriting it omits the repainting
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void
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VCanvas::focusInEvent( TQFocusEvent * )
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{
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}
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KoPoint
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VCanvas::toViewport( const KoPoint &p ) const
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{
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KoPoint p2 = p;
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p2.setX( ( p.x() * m_view->zoom() ) - contentsX() + pageOffsetX() );
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if( contentsHeight() > height() )
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p2.setY( ( contentsHeight() - ( p.y() * m_view->zoom() + contentsY() + pageOffsetY() ) ) );
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else
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p2.setY( ( height() - p.y() * m_view->zoom() + pageOffsetY() ) );
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return p2;
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}
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KoPoint
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VCanvas::toContents( const KoPoint &p ) const
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{
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KoPoint p2 = p;
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p2.setX( ( p.x() + contentsX() - pageOffsetX() ) / m_view->zoom() );
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if( contentsHeight() > height() )
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p2.setY( ( contentsHeight() - ( p.y() + contentsY() + pageOffsetY()) ) / m_view->zoom() );
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else
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p2.setY( ( height() - p.y() - pageOffsetY() ) / m_view->zoom() );
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return p2;
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}
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KoRect
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VCanvas::boundingBox() const
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{
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KoPoint p1( 0, 0 );
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KoPoint p2( width(), height() );
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if( !m_view->documentDeleted() )
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{
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p1 = toContents( p1 );
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p2 = toContents( p2 );
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}
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return KoRect( p1, p2 ).normalize();
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}
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void
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VCanvas::setYMirroring( VPainter *p )
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{
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TQWMatrix mat;
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mat.scale( 1, -1 );
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mat.translate( pageOffsetX(), pageOffsetY() );
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if( contentsHeight() > visibleHeight() )
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mat.translate( -contentsX(), contentsY() - contentsHeight() );
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else
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mat.translate( 0, -visibleHeight() );
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p->setWorldMatrix( mat );
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}
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void
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VCanvas::viewportPaintEvent( TQPaintEvent *e )
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{
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TQRect eventRect = e->rect();
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KoRect rect = KoRect::fromTQRect( eventRect );
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setYMirroring( m_view->painterFactory()->editpainter() );
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viewport()->setUpdatesEnabled( false );
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VPainter *p = m_view->painterFactory()->painter();
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// TODO : only update ROIs
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p->begin();
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p->clear( rect, TQColor( 195, 194, 193 ) );
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p->setZoomFactor( m_view->zoom() );
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setYMirroring( p );
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// TRICK : slightly adjust the matrix so libart AA looks better
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TQWMatrix mat = p->worldMatrix();
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p->setWorldMatrix( mat.translate( -.5, -.5 ) );
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// set up clippath
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p->newPath();
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p->moveTo( rect.topLeft() );
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p->lineTo( rect.topRight() );
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p->lineTo( rect.bottomRight() );
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p->lineTo( rect.bottomLeft() );
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p->lineTo( rect.topLeft() );
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p->setClipPath();
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m_part->document().drawPage( p, m_part->pageLayout(), m_view->showPageMargins() );
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KoRect bbox = boundingBox();
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m_part->document().draw( p, &bbox );
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p->resetClipPath();
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p->end();
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// draw handle:
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VTQPainter qpainter( p->device() );
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setYMirroring( &qpainter );
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qpainter.setZoomFactor( m_view->zoom() );
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m_part->document().selection()->draw( &qpainter, m_view->zoom() );
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if( m_view->toolController()->currentTool() )
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m_view->toolController()->currentTool()->draw( &qpainter );
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bitBlt( viewport(), eventRect.topLeft(), p->device(), eventRect );
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viewport()->setUpdatesEnabled( true );
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}
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void
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VCanvas::setViewport( double centerX, double centerY )
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{
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setContentsPos( int( centerX * contentsWidth() - 0.5 * visibleWidth() ),
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int( centerY * contentsHeight() - 0.5 * visibleHeight() ) );
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}
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void
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VCanvas::setViewportRect( const KoRect &r )
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{
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viewport()->setUpdatesEnabled( false );
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double zoomX = m_view->zoom() * ( ( visibleWidth() / m_view->zoom() ) / r.width() );
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double zoomY = m_view->zoom() * ( ( visibleHeight() / m_view->zoom() ) / r.height() );
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double pageOffX = ( contentsWidth() - ( m_part->document().width() * m_view->zoom() ) ) / 2.0;
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double centerX = double( ( r.center().x() ) * m_view->zoom() + pageOffX ) / double( contentsWidth() );
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double pageOffY = ( contentsHeight() - ( m_part->document().height() * m_view->zoom() ) ) / 2.0;
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double centerY = double( ( r.center().y() ) * m_view->zoom() + pageOffY ) / double( contentsHeight() );
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double zoom = zoomX < zoomY ? zoomX : zoomY;
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resizeContents( int( ( zoom / m_view->zoom() ) * contentsWidth() ),
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int( ( zoom / m_view->zoom() ) * contentsHeight() ) );
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setViewport( centerX, 1.0 - centerY );
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m_view->setZoomAt( zoom );
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viewport()->setUpdatesEnabled( true );
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}
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void
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VCanvas::drawContents( TQPainter* painter, int clipx, int clipy,
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int clipw, int cliph )
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{
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drawDocument( painter, KoRect( clipx, clipy, clipw, cliph ) );
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}
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void
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VCanvas::drawDocument( TQPainter* /*painter*/, const KoRect&, bool drawVObjects )
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{
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setYMirroring( m_view->painterFactory()->editpainter() );
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VPainter* p = m_view->painterFactory()->painter();
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if( drawVObjects )
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{
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p->begin();
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p->clear( TQColor( 195, 194, 193 ) );
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p->setZoomFactor( m_view->zoom() );
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setYMirroring( p );
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// TRICK : slightly adjust the matrix so libart AA looks better
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TQWMatrix mat = p->worldMatrix();
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p->setWorldMatrix( mat.translate( -.5, -.5 ) );
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m_part->document().drawPage( p, m_part->pageLayout(), m_view->showPageMargins() );
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KoRect r2 = boundingBox();
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m_part->document().draw( p, &r2 );
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p->end();
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}
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// draw handle:
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VTQPainter qpainter( p->device() );
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setYMirroring( &qpainter );
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qpainter.setZoomFactor( m_view->zoom() );
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m_part->document().selection()->draw( &qpainter, m_view->zoom() );
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if( m_view->toolController()->currentTool() )
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m_view->toolController()->currentTool()->draw( &qpainter );
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bitBlt( viewport(), 0, 0, p->device(), 0, 0, width(), height() );
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}
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void
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VCanvas::repaintAll( bool drawVObjects )
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{
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drawDocument( 0, KoRect( 0, 0, width(), height() ), drawVObjects );
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}
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/// repaints just a rect area (no scrolling)
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void
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VCanvas::repaintAll( const KoRect &r )
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{
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drawDocument( 0, r );
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}
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void
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VCanvas::resizeEvent( TQResizeEvent* event )
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{
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double centerX = double( contentsX() + 0.5 * visibleWidth() ) / double( contentsWidth() );
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double centerY = double( contentsY() + 0.5 * visibleHeight() ) / double( contentsHeight() );
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TQScrollView::resizeEvent( event );
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if( !m_pixmap )
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m_pixmap = new TQPixmap( width(), height() );
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else
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m_pixmap->resize( width(), height() );
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VPainter *p = m_view->painterFactory()->painter();
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p->resize( width(), height() );
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p->clear( TQColor( 195, 194, 193 ) );
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setViewport( centerX, centerY );
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}
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void
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VCanvas::slotContentsMoving( int /*x*/, int /*y*/ )
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{
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emit viewportChanged();
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}
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void
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VCanvas::dragEnterEvent( TQDragEnterEvent *e )
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{
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e->accept( KarbonDrag::canDecode( e ) || KColorDrag::canDecode( e ) );
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}
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void
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VCanvas::dropEvent( TQDropEvent *e )
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{
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m_view->dropEvent( e );
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}
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#include "vcanvas.moc"
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