lib
KoZoomHandler.cpp
00001 /* This file is part of the KDE project 00002 Copyright (C) 2001-2005 David Faure <faure@kde.org> 00003 00004 This library is free software; you can redistribute it and/or 00005 modify it under the terms of the GNU Library General Public 00006 License as published by the Free Software Foundation; either 00007 version 2 of the License, or (at your option) any later version. 00008 00009 This library is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 Library General Public License for more details. 00013 00014 You should have received a copy of the GNU Library General Public License 00015 along with this library; see the file COPYING.LIB. If not, write to 00016 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 00017 Boston, MA 02110-1301, USA. 00018 */ 00019 00020 #include "KoZoomHandler.h" 00021 #include <kdebug.h> 00022 #include <KoUnit.h> // for POINT_TO_INCH 00023 #include <KoGlobal.h> 00024 00025 KoZoomHandler::KoZoomHandler() 00026 { 00027 // Note that this calls the method below, not the derived one 00028 setZoomAndResolution( 100, KoGlobal::dpiX(), KoGlobal::dpiY() ); 00029 } 00030 00031 void KoZoomHandler::setZoomAndResolution( int zoom, int dpiX, int dpiY ) 00032 { 00033 // m_resolution[XY] is in pixel per pt 00034 m_resolutionX = POINT_TO_INCH( static_cast<double>(dpiX) ); 00035 m_resolutionY = POINT_TO_INCH( static_cast<double>(dpiY) ); 00036 setZoom( zoom ); 00037 /*kdDebug(32500) << "KoZoomHandler::setZoomAndResolution " << zoom << " " << dpiX << "," << dpiY 00038 << " m_resolutionX=" << m_resolutionX 00039 << " m_zoomedResolutionX=" << m_zoomedResolutionX 00040 << " m_resolutionY=" << m_resolutionY 00041 << " m_zoomedResolutionY=" << m_zoomedResolutionY << endl;*/ 00042 } 00043 00044 void KoZoomHandler::setResolution( double resolutionX, double resolutionY ) 00045 { 00046 m_zoom = 100; 00047 m_resolutionX = resolutionX; 00048 m_resolutionY = resolutionY; 00049 m_zoomedResolutionX = resolutionX; 00050 m_zoomedResolutionY = resolutionY; 00051 } 00052 00053 void KoZoomHandler::setZoomedResolution( double zoomedResolutionX, double zoomedResolutionY ) 00054 { 00055 // m_zoom doesn't matter, it's only used in setZoom() to calculated the zoomed resolutions 00056 // Here we know them. The whole point of this method is to allow a different zoom factor 00057 // for X and for Y, as can be useful for e.g. fullscreen kpresenter presentations. 00058 m_zoomedResolutionX = zoomedResolutionX; 00059 m_zoomedResolutionY = zoomedResolutionY; 00060 } 00061 00062 void KoZoomHandler::setZoom( int zoom ) 00063 { 00064 m_zoom = zoom; 00065 if( m_zoom == 100 ) { 00066 m_zoomedResolutionX = m_resolutionX; 00067 m_zoomedResolutionY = m_resolutionY; 00068 } else { 00069 m_zoomedResolutionX = static_cast<double>(m_zoom) * m_resolutionX / 100.0; 00070 m_zoomedResolutionY = static_cast<double>(m_zoom) * m_resolutionY / 100.0; 00071 } 00072 }