Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 371 insertions, 0 deletions

diff --git a/kview/kviewcanvas/kimageholder.cpp b/kview/kviewcanvas/kimageholder.cpp
new file mode 100644
index 00000000..9009c7fc
--- /dev/null
+++ b/kview/kviewcanvas/kimageholder.cpp
@@ -0,0 +1,371 @@
+/*  This file is part of the KDE project
+    Copyright (C) 2001-2002 Matthias Kretz <[email protected]>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License version 2
+    as published by the Free Software Foundation.
+
+    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.
+
+*/
+
+//$Id$
+
+#include <assert.h>
+
+#include <qcolor.h>
+#include <qwidget.h>
+#include <qimage.h>
+#include <qpainter.h>
+#include <qpen.h>
+#include <qmovie.h>
+#include <qpixmap.h>
+
+#include <kpixmap.h>
+#include <kdebug.h>
+
+#include "kimageholder.h"
+
+KImageHolder::KImageHolder( QWidget * parent, const char * name )
+	: QWidget( parent, name, Qt::WResizeNoErase | Qt::WRepaintNoErase )
+	, m_selected( false )
+	, m_bSelecting( false )
+	, m_scrollTimerId( 0 )
+	, m_xOffset( 0 )
+	, m_yOffset( 0 )
+	, m_pen( new QPen( QColor( 255, 255, 255 ), 0, DashLine ) )
+	, m_pPixmap( 0 )
+	, m_pDoubleBuffer( 0 )
+	, m_pCheckboardPixmap( 0 )
+{
+	setBackgroundMode( QWidget::NoBackground );
+}
+
+KImageHolder::~KImageHolder()
+{
+	delete m_pen;
+	delete m_pPixmap;
+	delete m_pDoubleBuffer;
+	delete m_pCheckboardPixmap;
+	m_pen = 0;
+	m_pPixmap = 0;
+	m_pDoubleBuffer = 0;
+	m_pCheckboardPixmap = 0;
+}
+
+void KImageHolder::mousePressEvent( QMouseEvent *ev )
+{
+	//kdDebug( 4620 ) << k_funcinfo << " ev->state() = " << ev->state() << endl;
+	// if the right mouse button is pressed emit the contextPress signal
+	if ( ev->button() == RightButton )
+	{
+		emit contextPress( mapToGlobal( ev->pos() ) );
+		return;
+	}
+
+	if( m_pPixmap == 0 )
+		return;
+
+	if( ev->button() == LeftButton || ev->button() == MidButton )
+	{
+		m_scrollpos = ev->globalPos();
+		m_selectionStartPoint = ev->pos();
+	}
+}
+
+void KImageHolder::mouseMoveEvent( QMouseEvent *ev )
+{
+	//FIXME: when scrolling the cursorpos shouldn't change
+	if( this->rect().contains( ev->pos(), false ) )
+		emit cursorPos( ev->pos() );
+	//kdDebug( 4620 ) << k_funcinfo << " ev->state() = " << ev->state() << endl;
+	if( ev->state() & LeftButton || ev->state() & MidButton )
+	{
+		// scroll when a modifier and left button or the middle button is pressed
+		if( ev->state() & AltButton || ev->state() & ControlButton || ev->state() & ShiftButton || ev->state() & MidButton )
+		{
+			QPoint difference = m_scrollpos - ev->globalPos();
+			emit wannaScroll( difference.x(), difference.y() );
+		}
+		else // create a selection
+		{
+			QWidget * parentwidget = ( QWidget* )parent();
+			if( ! m_bSelecting )
+			{
+				m_bSelecting = true;
+				if( m_selected ) {
+					// remove old rubberband
+					eraseSelect();
+					m_selected = false;
+				}
+
+				m_selection.setLeft( m_selectionStartPoint.x() );
+				m_selection.setRight( m_selectionStartPoint.x() );
+				m_selection.setTop( m_selectionStartPoint.y() );
+				m_selection.setBottom( m_selectionStartPoint.y() );
+			}
+			// currently called only on drag,
+			// so assume a selection has been started
+			bool erase = m_selected;
+
+			if( !m_selected )
+				m_selected = true;
+
+			// Autoscrolling:
+			// For every pixel the mouse leaves the image canvas the canvas
+			// should scroll faster. The scrolling should be independent from
+			// the mouse movement. Therefor I need a timer to do the scroll
+			// movement:
+			// e.g.: m_xOffset=-1 => scroll to the left 1 px per 50ms
+			//                 -2 => scroll to the left 2 px per 50ms
+			//                  2 => scroll to the right 2 px per 50ms
+			//                 ...
+			m_xOffset = mapTo( parentwidget, ev->pos() ).x();
+			m_yOffset = mapTo( parentwidget, ev->pos() ).y();
+			if( m_xOffset > 0 )
+			{
+				m_xOffset -= parentwidget->width();
+				if( m_xOffset < 0 )
+					m_xOffset = 0;
+			}
+			if( m_yOffset > 0 )
+			{
+				m_yOffset -= parentwidget->height();
+				if( m_yOffset < 0 )
+					m_yOffset = 0;
+			}
+			if( m_scrollTimerId != 0 && m_xOffset == 0 && m_yOffset == 0 )
+			{
+				killTimer( m_scrollTimerId );
+				m_scrollTimerId = 0;
+			}
+			else if( m_scrollTimerId == 0 && ( m_xOffset != 0 || m_yOffset != 0 ) )
+				m_scrollTimerId = startTimer( 50 );
+
+			int r = ev->x() < width()  ? ( ev->x() < 0 ? 0 : ev->x() ) : width()  - 1;
+			int b = ev->y() < height() ? ( ev->y() < 0 ? 0 : ev->y() ) : height() - 1;
+
+			if( r != m_selection.right() || b != m_selection.bottom() )
+			{
+				if( erase )
+					eraseSelect();
+
+				m_selection.setRight( r );
+				m_selection.setBottom( b );
+				emit selected( m_selection.normalize() );
+
+				QPainter painter( this );
+				drawSelect( painter );
+			}
+		}
+		m_scrollpos = ev->globalPos();
+		m_selectionStartPoint = ev->pos();
+	}
+}
+
+void KImageHolder::mouseReleaseEvent( QMouseEvent * ev )
+{
+	if( m_bSelecting )
+	{
+		m_xOffset = m_yOffset = 0;
+		if( m_scrollTimerId != 0 )
+		{
+			killTimer( m_scrollTimerId );
+			m_scrollTimerId = 0;
+		}
+	}
+	if( ev->state() & LeftButton || ev->state() & MidButton )
+		if( m_bSelecting )
+			m_bSelecting = false;
+		else
+			clearSelection();
+}
+
+void KImageHolder::drawSelect( QPainter & painter )
+{
+	painter.save();
+	painter.setRasterOp( XorROP );
+	painter.setPen( *m_pen );
+	painter.drawRect( m_selection.normalize() );
+	painter.restore();
+}
+
+void KImageHolder::eraseSelect()
+{
+	QRegion r( m_selection.normalize() );
+	QRect inner = m_selection.normalize();
+	inner.rLeft() += 1;
+	inner.rTop() += 1;
+	inner.rRight() -= 1;
+	inner.rBottom() -= 1;
+	r -= inner;
+
+	QMemArray<QRect> rects = r.rects();
+
+	if( m_pDoubleBuffer )
+		for( unsigned int i = 0; i < rects.size(); ++i )
+			bitBlt( this, rects[ i ].topLeft(), m_pDoubleBuffer, rects[ i ], CopyROP );
+	else
+		for( unsigned int i = 0; i < rects.size(); ++i )
+			bitBlt( this, rects[ i ].topLeft(), m_pPixmap, rects[ i ], CopyROP );
+}
+
+void KImageHolder::clearSelection()
+{
+	if( m_selected )
+	{
+		eraseSelect();
+		m_selected = false;
+	}
+	m_selection.setSize( QSize( 0, 0 ) );
+	emit selected( m_selection );
+}
+
+void KImageHolder::setImage( const KPixmap & pix )
+{
+	clearSelection();
+
+	setPixmap( pix );
+}
+
+void KImageHolder::setImage( const QImage & image )
+{
+	clearSelection();
+	kdDebug( 4620 ) << "converting Image to Pixmap" << endl;
+	KPixmap pix( image );
+
+	setPixmap( pix );
+}
+
+void KImageHolder::setImage( const QMovie & /*movie*/ )
+{
+	clearSelection();
+	//setMovie( movie );
+	kdWarning( 4620 ) << "setImage( QMovie ) not implemented" << endl;
+}
+
+void KImageHolder::clear()
+{
+	delete m_pPixmap;
+	m_pPixmap = 0;
+	delete m_pDoubleBuffer;
+	m_pDoubleBuffer = 0;
+	hide();
+	clearSelection();
+}
+
+QRect KImageHolder::selection() const
+{
+	if( m_selected )
+		return m_selection.normalize();
+	else
+		return QRect();
+}
+
+QSize KImageHolder::sizeHint() const
+{
+	if( m_pPixmap )
+		return m_pPixmap->size();
+	return QSize( 0, 0 );
+}
+
+void KImageHolder::paintEvent( QPaintEvent *ev )
+{
+	QPainter painter( this );
+	painter.setClipRegion( ev->region().intersect( m_drawRect ) );
+	if( m_pPixmap )
+	{
+		if( m_pPixmap->mask() )
+		{
+			if( ! m_pDoubleBuffer )
+			{
+				m_pDoubleBuffer = new KPixmap( m_pPixmap->size() );
+				QPainter p( m_pDoubleBuffer );
+				p.drawTiledPixmap( m_pDoubleBuffer->rect(), checkboardPixmap() );
+				p.end();
+				bitBlt( m_pDoubleBuffer, QPoint( 0, 0 ), m_pPixmap, m_pPixmap->rect() );
+			}
+			painter.drawPixmap( 0, 0, *m_pDoubleBuffer );
+		}
+		else
+			painter.drawPixmap( 0, 0, *m_pPixmap );
+	}
+	if( m_selected )
+		drawSelect( painter );
+}
+
+void KImageHolder::timerEvent( QTimerEvent * ev )
+{
+	if( ev->timerId() != m_scrollTimerId )
+		return;
+
+	emit wannaScroll( m_xOffset, m_yOffset );
+}
+
+void KImageHolder::setPixmap( const KPixmap & pixmap )
+{
+	kdDebug( 4620 ) << k_funcinfo << " " << pixmap.width() << 'x' << pixmap.height() << endl;
+	delete m_pPixmap;
+	delete m_pDoubleBuffer;
+	m_pDoubleBuffer = 0;
+	m_pPixmap = new KPixmap( pixmap );
+	m_drawRect = m_pPixmap->rect();
+	show();
+}
+
+const KPixmap & KImageHolder::checkboardPixmap()
+{
+	if( ! m_pCheckboardPixmap )
+	{
+		const char * xpm[] = {
+			"32 32 2 1",
+			"  c #666666",
+			"X c #999999",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"                XXXXXXXXXXXXXXXX",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+			"XXXXXXXXXXXXXXXX                ",
+		};
+		m_pCheckboardPixmap = new KPixmap( xpm );
+	}
+	return *m_pCheckboardPixmap;
+}
+
+#include "kimageholder.moc"
+
+// vim:sw=4:ts=4