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90 lines
3.3 KiB
90 lines
3.3 KiB
/* This file is part of the KDE project
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Copyright (C) 2001-2005 David Faure <faure@kde.org>
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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 "KoTextZoomHandler.h"
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#include <kdebug.h>
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#include <tqpaintdevice.h>
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#include <KoUnit.h>
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#include <KoGlobal.h>
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// Layout text at 1440 DPI
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// Well, not really always 1440 DPI, but always 20 times the point size
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// This is constant, no need to litterally apply 1440 DPI at all resolutions.
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int KoTextZoomHandler::m_layoutUnitFactor = 20;
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#if 0
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int KoTextZoomHandler::fontSizeToLayoutUnit( double ptSizeFloat, bool forPrint ) const
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{
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return ptToLayoutUnit( ptSizeFloat / ( m_zoomedResolutionY *
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( forPrint ? 1.0 : (72.0 / KoGlobal::dpiY()) ) ) );
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}
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#endif
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double KoTextZoomHandler::layoutUnitToFontSize( int luSize, bool /*forPrint*/ ) const
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{
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// TQt will use TQPaintDevice::x11AppDpiY() to go from pt to pixel for fonts
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return layoutUnitPtToPt( luSize ) * m_zoomedResolutionY
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#ifdef Q_WS_X11
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/ POINT_TO_INCH(TQPaintDevice::x11AppDpiY())
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#endif
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;
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}
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int KoTextZoomHandler::layoutUnitToPixelX( int x, int w ) const
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{
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// We call layoutUnitToPixelX on the right value, i.e. x+w-1,
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// and then determine the height from the result (i.e. right-left+1).
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// Calling layoutUnitToPixelX(w) leads to rounding problems.
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return layoutUnitToPixelY( x + w - 1 ) - layoutUnitToPixelY( x ) + 1;
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}
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int KoTextZoomHandler::layoutUnitToPixelY( int y, int h ) const
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{
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// We call layoutUnitToPixelY on the bottom value, i.e. y+h-1,
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// and then determine the height from the result (i.e. bottom-top+1).
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// Calling layoutUnitToPixelY(h) leads to rounding problems.
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return layoutUnitToPixelY( y + h - 1 ) - layoutUnitToPixelY( y ) + 1;
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}
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int KoTextZoomHandler::layoutUnitToPixelX( int lupix ) const
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{
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return int( static_cast<double>( lupix * m_zoomedResolutionX )
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/ ( static_cast<double>( m_layoutUnitFactor ) * m_resolutionX ) );
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}
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int KoTextZoomHandler::layoutUnitToPixelY( int lupix ) const
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{
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// tqRound replaced with a truncation, too many problems (e.g. bottom of parags)
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return int( static_cast<double>( lupix * m_zoomedResolutionY )
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/ ( static_cast<double>( m_layoutUnitFactor ) * m_resolutionY ) );
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}
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int KoTextZoomHandler::pixelToLayoutUnitX( int x ) const
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{
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return tqRound( static_cast<double>( x * m_layoutUnitFactor * m_resolutionX )
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/ m_zoomedResolutionX );
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}
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int KoTextZoomHandler::pixelToLayoutUnitY( int y ) const
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{
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return tqRound( static_cast<double>( y * m_layoutUnitFactor * m_resolutionY )
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/ m_zoomedResolutionY );
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}
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