1 files changed, 156 insertions, 0 deletions
diff --git a/kviewshell/zoom.cpp b/kviewshell/zoom.cpp
new file mode 100644
index 00000000..3c3e56df
--- /dev/null
+++ b/kviewshell/zoom.cpp
@@ -0,0 +1,156 @@
+// zoom.cpp
+//
+// Part of KVIEWSHELL - A framework for multipage text/gfx viewers
+//
+// (C) 2002 Stefan Kebekus
+// Distributed under the GPL
+
+// Add header files alphabetically
+
+#include <config.h>
+
+#include <math.h>
+#include <qstringlist.h>
+
+#include <klocale.h>
+
+#include "zoom.h"
+#include "zoomlimits.h"
+
+float zoomVals[] = {0.20, 0.33, 0.50, 0.75, 1.00, 1.25, 1.50, 2.00, 2.50, 0};
+
+Zoom::Zoom()
+{
+  valueNames << i18n("Fit to Page Width");
+  valueNames << i18n("Fit to Page Height");
+  valueNames << i18n("Fit to Page");
+
+  _zoomValue = 1.0;
+  valNo      = 6; // 1.0 is 6rd entry in the list
+  for(int i=0; zoomVals[i] != 0; i++) 
+    valueNames << QString("%1%").arg(zoomVals[i]);
+}
+
+
+void Zoom::setZoomValue(const QString &cval)
+{
+  float fval;
+
+  // Remove a trailing '%', if any
+  QString val = cval.stripWhiteSpace();
+  if (val.right(1) == "%")
+    val = val.left(val.length()-1).stripWhiteSpace();
+
+  bool ok;
+  fval = val.toFloat(&ok)/100.0;
+
+  if (ok == true)
+    setZoomValue(fval);
+  else {
+    emit(zoomNamesChanged(valueNames));
+    emit(valNoChanged(valNo));
+    emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5))));
+  }
+}
+
+void Zoom::setZoomFitWidth(float zoom)
+{
+  // Make sure _zoomValue is in the permissible range!
+  if (zoom < ZoomLimits::MinZoom/1000.0)
+    zoom = ZoomLimits::MinZoom/1000.0;
+  if (zoom > ZoomLimits::MaxZoom/1000.0)
+    zoom = ZoomLimits::MaxZoom/1000.0;
+  _zoomValue = zoom;
+
+  valNo = 0;
+  emit(valNoChanged(valNo));
+  emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5))));
+}
+
+void Zoom::setZoomFitHeight(float zoom)
+{
+  // Make sure _zoomValue is in the permissible range!
+  if (zoom < ZoomLimits::MinZoom/1000.0)
+    zoom = ZoomLimits::MinZoom/1000.0;
+  if (zoom > ZoomLimits::MaxZoom/1000.0)
+    zoom = ZoomLimits::MaxZoom/1000.0;
+  _zoomValue = zoom;
+
+  valNo = 1;
+  emit(valNoChanged(valNo));
+  emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5))));
+}
+
+void Zoom::setZoomFitPage(float zoom)
+{
+  // Make sure _zoomValue is in the permissible range!
+  if (zoom < ZoomLimits::MinZoom/1000.0)
+    zoom = ZoomLimits::MinZoom/1000.0;
+  if (zoom > ZoomLimits::MaxZoom/1000.0)
+    zoom = ZoomLimits::MaxZoom/1000.0;
+  _zoomValue = zoom;
+
+  valNo = 2;
+  emit(valNoChanged(valNo));
+  emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5))));
+}
+
+void Zoom::setZoomValue(float f)
+{
+  // Make sure _zoomValue is in the permissible range!
+  if (f < ZoomLimits::MinZoom/1000.0)
+    f = ZoomLimits::MinZoom/1000.0;
+  if (f > ZoomLimits::MaxZoom/1000.0)
+    f = ZoomLimits::MaxZoom/1000.0;
+  _zoomValue = f;
+
+
+  valueNames.clear();
+
+  valueNames << i18n("Fit to Page Width");
+  valueNames << i18n("Fit to Page Height");
+  valueNames << i18n("Fit to Page");
+
+  bool flag = false;
+  for(int i = 0; zoomVals[i] != 0; i++) {
+    if ((_zoomValue <= zoomVals[i]) && (flag == false)) {
+      flag  = true;
+      valNo = i + 3;
+      if (fabs(_zoomValue-zoomVals[i]) > 0.01)
+        valueNames << QString("%1%").arg((int)(_zoomValue*100.0+0.5));
+    }
+    valueNames << QString("%1%").arg((int)(zoomVals[i]*100.0+0.5));
+  }
+
+  if (flag == false) {
+    valNo = valueNames.size();
+    valueNames << QString("%1%").arg((int)(_zoomValue*100.0+0.5));
+  }
+
+  emit(zoomNamesChanged(valueNames));
+  emit(valNoChanged(valNo));
+  emit(zoomNameChanged(QString("%1%").arg((int)(_zoomValue*100.0+0.5))));
+}
+
+float Zoom::zoomIn()
+{
+  int i;
+  for(i=0; zoomVals[i] != 0; i++) 
+    if (zoomVals[i] > _zoomValue)
+      return zoomVals[i];
+
+  return zoomVals[i-1];
+}
+
+float Zoom::zoomOut()
+{
+  float result = zoomVals[0];
+
+  for(int i=0; zoomVals[i] != 0; i++) 
+    if (_zoomValue > zoomVals[i])
+      result = zoomVals[i];
+
+  return result;
+}
+
+#include "zoom.moc"