private static GeoElement updateOldValue(
Kernel kernel, GeoElement oldValue, String name, String text) throws Exception {
String text0 = text;
if (text.charAt(0) == '=') {
text = text.substring(1);
}
GeoElement newValue = null;
try {
// always redefine objects in spreadsheet, don't store undo info
// here
newValue =
kernel
.getAlgebraProcessor()
.changeGeoElementNoExceptionHandling(oldValue, text, true, false);
// newValue.setConstructionDefaults();
newValue.setAllVisualProperties(oldValue, true);
if (oldValue.isAuxiliaryObject()) {
newValue.setAuxiliaryObject(true);
}
// Application.debug("GeoClassType = " +
// newValue.getGeoClassType()+" " + newValue.getGeoClassType());
if (newValue.getGeoClassType() == oldValue.getGeoClassType()) {
// newValue.setVisualStyle(oldValue);
} else {
kernel.getApplication().refreshViews();
}
} catch (CircularDefinitionException cde) {
kernel.getApplication().showError("CircularDefinition");
return null;
} catch (Throwable e) {
// if exception is thrown treat the input as text and try to update
// the cell as a GeoText
{
// reset the text string if old value is GeoText
if (oldValue.isGeoText()) {
((GeoText) oldValue).setTextString(text0);
oldValue.updateCascade();
}
// if not currently a GeoText and no children, redefine the cell
// as new GeoText
else if (!oldValue.hasChildren()) {
oldValue.remove();
// add input as text
try {
newValue = prepareNewValue(kernel, name, "\"" + text0 + "\"");
} catch (Throwable t) {
newValue = prepareNewValue(kernel, name, "");
}
newValue.setEuclidianVisible(false);
newValue.update();
}
// otherwise throw an exception and let the cell revert to the
// old value
else {
throw new Exception(e);
}
}
}
return newValue;
}
/**
* @param geo the geo
* @return the GeoClass of the wrapped Geo
*/
public static GeoClass getGeoClassType(GeoElement geo) {
return geo.getGeoClassType();
}