KDE 3.5 API Reference kviewshell
zoom.cpp
Go to the documentation of this file.00001 // zoom.cpp 00002 // 00003 // Part of KVIEWSHELL - A framework for multipage text/gfx viewers 00004 // 00005 // (C) 2002 Stefan Kebekus 00006 // Distributed under the GPL 00007 00008 // Add header files alphabetically 00009 00010 #include <config.h> 00011 00012 #include <math.h> 00013 #include <qstringlist.h> 00014 00015 #include <klocale.h> 00016 00017 #include "zoom.h" 00018 #include "zoomlimits.h" 00019 00020 float zoomVals[] = {0.20, 0.33, 0.50, 0.75, 1.00, 1.25, 1.50, 2.00, 2.50, 0}; 00021 00022 Zoom::Zoom() 00023 { 00024 valueNames << i18n("Fit to Page Width"); 00025 valueNames << i18n("Fit to Page Height"); 00026 valueNames << i18n("Fit to Page"); 00027 00028 _zoomValue = 1.0; 00029 valNo = 6; // 1.0 is 6rd entry in the list 00030 for(int i=0; zoomVals[i] != 0; i++) 00031 valueNames << QString("%1%").arg(zoomVals[i]); 00032 } 00033 00034 00035 void Zoom::setZoomValue(const QString &cval) 00036 { 00037 float fval; 00038 00039 // Remove a trailing '%', if any 00040 QString val = cval.stripWhiteSpace(); 00041 if (val.right(1) == "%") 00042 val = val.left(val.length()-1).stripWhiteSpace(); 00043 00044 bool ok; 00045 fval = val.toFloat(&ok)/100.0; 00046 00047 if (ok == true) 00048 setZoomValue(fval); 00049 else { 00050 emit(zoomNamesChanged(valueNames)); 00051 emit(valNoChanged(valNo)); 00052 emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5)))); 00053 } 00054 } 00055 00056 void Zoom::setZoomFitWidth(float zoom) 00057 { 00058 // Make sure _zoomValue is in the permissible range! 00059 if (zoom < ZoomLimits::MinZoom/1000.0) 00060 zoom = ZoomLimits::MinZoom/1000.0; 00061 if (zoom > ZoomLimits::MaxZoom/1000.0) 00062 zoom = ZoomLimits::MaxZoom/1000.0; 00063 _zoomValue = zoom; 00064 00065 valNo = 0; 00066 emit(valNoChanged(valNo)); 00067 emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5)))); 00068 } 00069 00070 void Zoom::setZoomFitHeight(float zoom) 00071 { 00072 // Make sure _zoomValue is in the permissible range! 00073 if (zoom < ZoomLimits::MinZoom/1000.0) 00074 zoom = ZoomLimits::MinZoom/1000.0; 00075 if (zoom > ZoomLimits::MaxZoom/1000.0) 00076 zoom = ZoomLimits::MaxZoom/1000.0; 00077 _zoomValue = zoom; 00078 00079 valNo = 1; 00080 emit(valNoChanged(valNo)); 00081 emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5)))); 00082 } 00083 00084 void Zoom::setZoomFitPage(float zoom) 00085 { 00086 // Make sure _zoomValue is in the permissible range! 00087 if (zoom < ZoomLimits::MinZoom/1000.0) 00088 zoom = ZoomLimits::MinZoom/1000.0; 00089 if (zoom > ZoomLimits::MaxZoom/1000.0) 00090 zoom = ZoomLimits::MaxZoom/1000.0; 00091 _zoomValue = zoom; 00092 00093 valNo = 2; 00094 emit(valNoChanged(valNo)); 00095 emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5)))); 00096 } 00097 00098 void Zoom::setZoomValue(float f) 00099 { 00100 // Make sure _zoomValue is in the permissible range! 00101 if (f < ZoomLimits::MinZoom/1000.0) 00102 f = ZoomLimits::MinZoom/1000.0; 00103 if (f > ZoomLimits::MaxZoom/1000.0) 00104 f = ZoomLimits::MaxZoom/1000.0; 00105 _zoomValue = f; 00106 00107 00108 valueNames.clear(); 00109 00110 valueNames << i18n("Fit to Page Width"); 00111 valueNames << i18n("Fit to Page Height"); 00112 valueNames << i18n("Fit to Page"); 00113 00114 bool flag = false; 00115 for(int i = 0; zoomVals[i] != 0; i++) { 00116 if ((_zoomValue <= zoomVals[i]) && (flag == false)) { 00117 flag = true; 00118 valNo = i + 3; 00119 if (fabs(_zoomValue-zoomVals[i]) > 0.01) 00120 valueNames << QString("%1%").arg((int)(_zoomValue*100.0+0.5)); 00121 } 00122 valueNames << QString("%1%").arg((int)(zoomVals[i]*100.0+0.5)); 00123 } 00124 00125 if (flag == false) { 00126 valNo = valueNames.size(); 00127 valueNames << QString("%1%").arg((int)(_zoomValue*100.0+0.5)); 00128 } 00129 00130 emit(zoomNamesChanged(valueNames)); 00131 emit(valNoChanged(valNo)); 00132 emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5)))); 00133 } 00134 00135 float Zoom::zoomIn() 00136 { 00137 int i; 00138 for(i=0; zoomVals[i] != 0; i++) 00139 if (zoomVals[i] > _zoomValue) 00140 return zoomVals[i]; 00141 00142 return zoomVals[i-1]; 00143 } 00144 00145 float Zoom::zoomOut() 00146 { 00147 float result = zoomVals[0]; 00148 00149 for(int i=0; zoomVals[i] != 0; i++) 00150 if (_zoomValue > zoomVals[i]) 00151 result = zoomVals[i]; 00152 00153 return result; 00154 } 00155 00156 #include "zoom.moc"
