public boolean validate(final PreferencePage parent) {
boolean retval = true;
String errorMsg = null;
if (impls.size() <= 0) {
errorMsg = UITexts.cabalImplsBlock_noCabalInstallations;
retval = !retval;
} else {
Object[] checked = viewer.getCheckedElements();
if (checked.length > 0) {
if (checked.length > 1) {
errorMsg = UITexts.cabalImplsBlock_multipleImplsSelected;
retval = !retval;
}
} else {
// <= 0...
errorMsg = UITexts.cabalImplsBlock_noCabalInstallationSelected;
retval = !retval;
}
}
if (!retval) {
parent.setErrorMessage(errorMsg);
}
return retval;
}
/**
* Applies the status to the status line of a dialog page.
*
* @param status the status
*/
private void applyToStatusLine(IStatus status) {
String message = status.getMessage();
switch (status.getSeverity()) {
case IStatus.OK:
fPreferencePage.setMessage(message, IMessageProvider.NONE);
fPreferencePage.setErrorMessage(null);
break;
case IStatus.WARNING:
fPreferencePage.setMessage(message, IMessageProvider.WARNING);
fPreferencePage.setErrorMessage(null);
break;
case IStatus.INFO:
fPreferencePage.setMessage(message, IMessageProvider.INFORMATION);
fPreferencePage.setErrorMessage(null);
break;
default:
if (message.length() == 0) {
message = null;
}
fPreferencePage.setMessage(null);
fPreferencePage.setErrorMessage(message);
break;
}
}