1 files changed, 380 insertions, 0 deletions
diff --git a/karbon/widgets/vcanvas.cpp b/karbon/widgets/vcanvas.cpp
new file mode 100644
index 00000000..d4cd6497
--- /dev/null
+++ b/karbon/widgets/vcanvas.cpp
@@ -0,0 +1,380 @@
+/* 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 <tqpainter.h>
+#include <tqpixmap.h>
+
+#include "karbon_view.h"
+#include "karbon_part.h"
+#include "karbon_drag.h"
+#include "vcanvas.h"
+#include "vdocument.h"
+#include "vpainter.h"
+#include "vqpainter.h"
+#include "vpainterfactory.h"
+#include "vselection.h"
+#include "vtoolcontroller.h"
+#include "vtool.h"
+
+#include <kdebug.h>
+#include <tdelocale.h>
+#include <kcolordrag.h>
+
+int
+VCanvas::pageOffsetX() const
+{
+	double zoomedWidth = m_part->document().width() * m_view->zoom();
+	if( contentsWidth() < visibleWidth() )
+		return int( 0.5 * ( visibleWidth() - zoomedWidth ) );
+	else
+		return int( 0.5 * ( contentsWidth() - zoomedWidth ) );
+}
+
+int
+VCanvas::pageOffsetY() const
+{
+	double zoomedHeight = m_part->document().height() * m_view->zoom();
+	if( contentsHeight() < visibleHeight() )
+		return int( 0.5 * ( visibleHeight() - zoomedHeight ) );
+	else
+		return int( 0.5 * ( contentsHeight() - zoomedHeight ) );
+}
+
+KoPoint VCanvas::snapToGrid( const KoPoint &point )
+{
+	if( !m_part->document().grid().isSnap )
+		return point;
+
+	KoPoint p = point;
+
+	KoSize dist = m_part->document().grid().snap;
+	KoSize dxy = m_part->document().grid().freq;
+
+	int dx = tqRound( p.x() / dxy.width() );
+	int dy = tqRound( p.y() / dxy.height() );
+
+	float distx = TQMIN( TQABS( p.x() - dxy.width() * dx ), TQABS( p.x() - dxy.width() * ( dx + 1 ) ) );
+	float disty = TQMIN( TQABS( p.y() - dxy.height() * dy ), TQABS( p.y() - dxy.height() * ( dy + 1 ) ) );
+
+	if( distx < dist.width() )
+	{
+		if( TQABS(p.x() - dxy.width() * dx ) < TQABS( p.x() - dxy.width() * ( dx + 1 ) ) )
+			p.rx() = dxy.width() * dx;
+		else
+			p.rx() = dxy.width() * ( dx + 1 );
+	}
+
+	if( disty < dist.height() )
+	{
+		if( TQABS( p.y() - dxy.height() * dy ) < TQABS( p.y() - dxy.height() * ( dy + 1 ) ) )
+			p.ry() = dxy.height() * dy;
+		else
+			p.ry() = dxy.height() * ( dy + 1 );
+	}
+
+	return p;
+}
+
+
+VCanvas::VCanvas( TQWidget *parent, KarbonView* view, KarbonPart* part )
+    : TQScrollView( parent, "canvas", WStaticContents/*WNorthWestGravity*/ | WResizeNoErase  |
+	  WRepaintNoErase ), m_part( part ), m_view( view )
+{
+	connect(this, TQT_SIGNAL( contentsMoving( int, int ) ), this, TQT_SLOT( slotContentsMoving( int, int ) ) );
+	viewport()->setFocusPolicy( TQ_StrongFocus );
+
+	viewport()->setMouseTracking( true );
+	setMouseTracking( true );
+
+	viewport()->setBackgroundColor( TQt::white );
+	viewport()->setBackgroundMode( TQWidget::NoBackground );
+	viewport()->installEventFilter( this );
+
+	resizeContents( 800, 600 );
+	m_pixmap = new TQPixmap( 800, 600 );
+
+	setFocus();
+
+	setAcceptDrops( true );
+}
+
+VCanvas::~VCanvas()
+{
+	delete m_pixmap;
+	m_view = 0L;
+	m_part = 0L;
+}
+
+void
+VCanvas::setPos( const KoPoint& p )
+{
+	KoPoint p2 = toViewport( p );
+	TQCursor::setPos( mapToGlobal( TQPoint( int(p2.x()), int(p2.y()) ) ) );
+}
+
+bool
+VCanvas::eventFilter( TQObject* object, TQEvent* event )
+{
+	TQScrollView::eventFilter( object, event );
+
+	if( event->type() == TQEvent::AccelOverride || event->type() == TQEvent::Accel )
+		return TQScrollView::eventFilter( object, event );
+
+	if( event->type() == TQEvent::KeyPress || event->type() == TQEvent::KeyRelease )
+		return m_view->keyEvent( event );
+
+	TQMouseEvent* mouseEvent = dynamic_cast<TQMouseEvent*>( event );
+
+	if( mouseEvent && m_view )
+	{
+		KoPoint canvasCoordinate = toContents( KoPoint( mouseEvent->pos() ) );
+		return m_view->mouseEvent( mouseEvent, canvasCoordinate );
+	}
+
+	return false;
+}
+
+
+// This causes a repaint normally, so just overwriting it omits the repainting
+void
+VCanvas::focusInEvent( TQFocusEvent * )
+{
+}
+
+KoPoint
+VCanvas::toViewport( const KoPoint &p ) const
+{
+	KoPoint p2 = p;
+	p2.setX( ( p.x() * m_view->zoom() ) - contentsX() + pageOffsetX() );
+	if( contentsHeight() > height() )
+		p2.setY( ( contentsHeight() - ( p.y() * m_view->zoom() + contentsY() + pageOffsetY() ) ) );
+	else
+		p2.setY( ( height() - p.y() * m_view->zoom() + pageOffsetY() ) );
+	return p2;
+}
+
+KoPoint
+VCanvas::toContents( const KoPoint &p ) const
+{
+	KoPoint p2 = p;
+	p2.setX( ( p.x() + contentsX() - pageOffsetX() ) / m_view->zoom() );
+	if( contentsHeight() > height() )
+		p2.setY( ( contentsHeight() - ( p.y() + contentsY() + pageOffsetY()) ) / m_view->zoom() );
+	else
+		p2.setY( ( height() - p.y() - pageOffsetY() ) / m_view->zoom() );
+	return p2;
+}
+
+KoRect
+VCanvas::boundingBox() const
+{
+	KoPoint p1( 0, 0 );
+	KoPoint p2( width(), height() );
+	if( !m_view->documentDeleted() )
+	{
+		p1 = toContents( p1 );
+		p2 = toContents( p2 );
+	}
+	return KoRect( p1, p2 ).normalize();
+}
+
+void
+VCanvas::setYMirroring( VPainter *p )
+{
+	TQWMatrix mat;
+
+	mat.scale( 1, -1 );
+	mat.translate( pageOffsetX(), pageOffsetY() );
+
+	if( contentsHeight() > visibleHeight() )
+		mat.translate( -contentsX(), contentsY() - contentsHeight() );
+	else
+		mat.translate( 0, -visibleHeight() );
+
+	p->setWorldMatrix( mat );
+}
+
+void
+VCanvas::viewportPaintEvent( TQPaintEvent *e )
+{
+	TQRect eventRect = e->rect();
+	KoRect rect = KoRect::fromTQRect( eventRect );
+	
+	setYMirroring( m_view->painterFactory()->editpainter() );
+	viewport()->setUpdatesEnabled( false );
+	VPainter *p = m_view->painterFactory()->painter();
+
+	// TODO : only update ROIs
+	p->begin();
+	p->clear( rect, TQColor( 195, 194, 193 ) );
+	p->setZoomFactor( m_view->zoom() );
+	setYMirroring( p );
+	
+	// TRICK : slightly adjust the matrix so libart AA looks better
+	TQWMatrix mat = p->worldMatrix();
+	p->setWorldMatrix( mat.translate( -.5, -.5 ) );
+
+	// set up clippath
+	p->newPath();
+	p->moveTo( rect.topLeft() );
+	p->lineTo( rect.topRight() );
+	p->lineTo( rect.bottomRight() );
+	p->lineTo( rect.bottomLeft() );
+	p->lineTo( rect.topLeft() );
+	p->setClipPath();
+
+	m_part->document().drawPage( p, m_part->pageLayout(), m_view->showPageMargins() );
+	KoRect bbox = boundingBox();
+	m_part->document().draw( p, &bbox );
+
+	p->resetClipPath();
+	p->end();
+
+	// draw handle:
+	VTQPainter qpainter( p->device() );
+	setYMirroring( &qpainter );
+	qpainter.setZoomFactor( m_view->zoom() );
+	m_part->document().selection()->draw( &qpainter, m_view->zoom() );
+
+	if( m_view->toolController()->currentTool() )
+		m_view->toolController()->currentTool()->draw( &qpainter );
+
+	bitBlt( viewport(), eventRect.topLeft(), p->device(), eventRect );
+	viewport()->setUpdatesEnabled( true );
+}
+
+void
+VCanvas::setViewport( double centerX, double centerY )
+{
+	setContentsPos( int( centerX * contentsWidth() - 0.5 * visibleWidth() ),
+					int( centerY * contentsHeight() - 0.5 * visibleHeight() ) );
+}
+
+void
+VCanvas::setViewportRect( const KoRect &r )
+{
+	viewport()->setUpdatesEnabled( false );
+	double zoomX = m_view->zoom() * ( ( visibleWidth() / m_view->zoom() ) / r.width() );
+	double zoomY = m_view->zoom() * ( ( visibleHeight() / m_view->zoom() ) / r.height() );
+	double pageOffX = ( contentsWidth() - ( m_part->document().width() * m_view->zoom() ) ) / 2.0;
+	double centerX = double( ( r.center().x() ) * m_view->zoom() + pageOffX ) / double( contentsWidth() );
+	double pageOffY = ( contentsHeight() - ( m_part->document().height() * m_view->zoom() ) ) / 2.0;
+	double centerY = double( ( r.center().y() ) * m_view->zoom() + pageOffY ) / double( contentsHeight() );
+	double zoom = zoomX < zoomY ? zoomX : zoomY;
+	resizeContents( int( ( zoom / m_view->zoom() ) * contentsWidth() ),
+					int( ( zoom / m_view->zoom() ) * contentsHeight() ) );
+	setViewport( centerX, 1.0 - centerY );
+	m_view->setZoomAt( zoom );
+	viewport()->setUpdatesEnabled( true );
+}
+
+void
+VCanvas::drawContents( TQPainter* painter, int clipx, int clipy,
+	int clipw, int cliph  )
+{
+	drawDocument( painter, KoRect( clipx, clipy, clipw, cliph ) );
+}
+
+void
+VCanvas::drawDocument( TQPainter* /*painter*/, const KoRect&, bool drawVObjects )
+{
+	setYMirroring( m_view->painterFactory()->editpainter() );
+
+	VPainter* p = m_view->painterFactory()->painter();
+	if( drawVObjects )
+	{
+		p->begin();
+		p->clear( TQColor( 195, 194, 193 ) );
+		p->setZoomFactor( m_view->zoom() );
+		setYMirroring( p );
+		// TRICK : slightly adjust the matrix so libart AA looks better
+		TQWMatrix mat = p->worldMatrix();
+		p->setWorldMatrix( mat.translate( -.5, -.5 ) );
+
+		m_part->document().drawPage( p, m_part->pageLayout(), m_view->showPageMargins() );
+		KoRect r2 = boundingBox();
+		m_part->document().draw( p, &r2 );
+
+		p->end();
+	}
+
+	// draw handle:
+	VTQPainter qpainter( p->device() );
+	setYMirroring( &qpainter );
+	qpainter.setZoomFactor( m_view->zoom() );
+	m_part->document().selection()->draw( &qpainter, m_view->zoom() );
+
+	if( m_view->toolController()->currentTool() )
+		m_view->toolController()->currentTool()->draw( &qpainter );
+
+	bitBlt( viewport(), 0, 0, p->device(), 0, 0, width(), height() );
+}
+
+void
+VCanvas::repaintAll( bool drawVObjects )
+{
+	drawDocument( 0, KoRect( 0, 0, width(), height() ), drawVObjects );
+}
+
+/// repaints just a rect area (no scrolling)
+void
+VCanvas::repaintAll( const KoRect &r )
+{
+	drawDocument( 0, r );
+}
+
+void
+VCanvas::resizeEvent( TQResizeEvent* event )
+{
+	double centerX = double( contentsX() + 0.5 * visibleWidth() ) / double( contentsWidth() );
+	double centerY = double( contentsY() + 0.5 * visibleHeight() ) / double( contentsHeight() );
+
+	TQScrollView::resizeEvent( event );
+	if( !m_pixmap )
+		m_pixmap = new TQPixmap( width(), height() );
+	else
+		m_pixmap->resize( width(), height() );
+
+	VPainter *p = m_view->painterFactory()->painter();
+	p->resize( width(), height() );
+	p->clear( TQColor( 195, 194, 193 ) );
+	setViewport( centerX, centerY );
+}
+
+void
+VCanvas::slotContentsMoving( int /*x*/, int /*y*/ )
+{
+	emit viewportChanged();
+}
+
+void
+VCanvas::dragEnterEvent( TQDragEnterEvent *e )
+{
+	e->accept( KarbonDrag::canDecode( e ) || KColorDrag::canDecode( e ) );
+}
+
+void
+VCanvas::dropEvent( TQDropEvent *e )
+{
+	m_view->dropEvent( e );
+}
+
+#include "vcanvas.moc"
+