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157 lines
3.7 KiB
157 lines
3.7 KiB
// zoom.cpp
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//
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// Part of KVIEWSHELL - A framework for multipage text/gfx viewers
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//
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// (C) 2002 Stefan Kebekus
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// Distributed under the GPL
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// Add header files alphabetically
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#include <config.h>
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#include <math.h>
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#include <tqstringlist.h>
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#include <tdelocale.h>
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#include "zoom.h"
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#include "zoomlimits.h"
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float zoomVals[] = {0.20, 0.33, 0.50, 0.75, 1.00, 1.25, 1.50, 2.00, 2.50, 0};
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Zoom::Zoom()
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{
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valueNames << i18n("Fit to Page Width");
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valueNames << i18n("Fit to Page Height");
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valueNames << i18n("Fit to Page");
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_zoomValue = 1.0;
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valNo = 6; // 1.0 is 6rd entry in the list
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for(int i=0; zoomVals[i] != 0; i++)
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valueNames << TQString("%1%").arg(zoomVals[i]);
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}
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void Zoom::setZoomValue(const TQString &cval)
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{
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float fval;
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// Remove a trailing '%', if any
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TQString val = cval.stripWhiteSpace();
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if (val.right(1) == "%")
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val = val.left(val.length()-1).stripWhiteSpace();
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bool ok;
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fval = val.toFloat(&ok)/100.0;
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if (ok == true)
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setZoomValue(fval);
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else {
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emit(zoomNamesChanged(valueNames));
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emit(valNoChanged(valNo));
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emit(zoomNameChanged(TQString("%1%").arg((int)(_zoomValue*100.0+0.5))));
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}
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}
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void Zoom::setZoomFitWidth(float zoom)
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{
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// Make sure _zoomValue is in the permissible range!
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if (zoom < ZoomLimits::MinZoom/1000.0)
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zoom = ZoomLimits::MinZoom/1000.0;
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if (zoom > ZoomLimits::MaxZoom/1000.0)
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zoom = ZoomLimits::MaxZoom/1000.0;
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_zoomValue = zoom;
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valNo = 0;
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emit(valNoChanged(valNo));
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emit(zoomNameChanged(TQString("%1%").arg((int)(_zoomValue*100.0+0.5))));
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}
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void Zoom::setZoomFitHeight(float zoom)
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{
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// Make sure _zoomValue is in the permissible range!
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if (zoom < ZoomLimits::MinZoom/1000.0)
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zoom = ZoomLimits::MinZoom/1000.0;
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if (zoom > ZoomLimits::MaxZoom/1000.0)
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zoom = ZoomLimits::MaxZoom/1000.0;
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_zoomValue = zoom;
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valNo = 1;
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emit(valNoChanged(valNo));
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emit(zoomNameChanged(TQString("%1%").arg((int)(_zoomValue*100.0+0.5))));
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}
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void Zoom::setZoomFitPage(float zoom)
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{
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// Make sure _zoomValue is in the permissible range!
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if (zoom < ZoomLimits::MinZoom/1000.0)
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zoom = ZoomLimits::MinZoom/1000.0;
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if (zoom > ZoomLimits::MaxZoom/1000.0)
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zoom = ZoomLimits::MaxZoom/1000.0;
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_zoomValue = zoom;
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valNo = 2;
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emit(valNoChanged(valNo));
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emit(zoomNameChanged(TQString("%1%").arg((int)(_zoomValue*100.0+0.5))));
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}
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void Zoom::setZoomValue(float f)
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{
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// Make sure _zoomValue is in the permissible range!
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if (f < ZoomLimits::MinZoom/1000.0)
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f = ZoomLimits::MinZoom/1000.0;
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if (f > ZoomLimits::MaxZoom/1000.0)
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f = ZoomLimits::MaxZoom/1000.0;
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_zoomValue = f;
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valueNames.clear();
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valueNames << i18n("Fit to Page Width");
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valueNames << i18n("Fit to Page Height");
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valueNames << i18n("Fit to Page");
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bool flag = false;
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for(int i = 0; zoomVals[i] != 0; i++) {
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if ((_zoomValue <= zoomVals[i]) && (flag == false)) {
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flag = true;
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valNo = i + 3;
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if (fabs(_zoomValue-zoomVals[i]) > 0.01)
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valueNames << TQString("%1%").arg((int)(_zoomValue*100.0+0.5));
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}
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valueNames << TQString("%1%").arg((int)(zoomVals[i]*100.0+0.5));
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}
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if (flag == false) {
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valNo = valueNames.size();
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valueNames << TQString("%1%").arg((int)(_zoomValue*100.0+0.5));
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}
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emit(zoomNamesChanged(valueNames));
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emit(valNoChanged(valNo));
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emit(zoomNameChanged(TQString("%1%").arg((int)(_zoomValue*100.0+0.5))));
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}
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float Zoom::zoomIn()
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{
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int i;
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for(i=0; zoomVals[i] != 0; i++)
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if (zoomVals[i] > _zoomValue)
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return zoomVals[i];
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return zoomVals[i-1];
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}
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float Zoom::zoomOut()
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{
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float result = zoomVals[0];
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for(int i=0; zoomVals[i] != 0; i++)
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if (_zoomValue > zoomVals[i])
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result = zoomVals[i];
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return result;
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}
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#include "zoom.moc"
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