public boolean isEnabled() {
JInternalFrame iFrame = desktop.getSelectedFrame();
if (iFrame != null) {
return iFrame.isClosable();
}
return false;
}
@RunsInCurrentThread
private static void validateCanClose(JInternalFrame internalFrame) {
validateIsShowing(internalFrame);
if (!internalFrame.isClosable())
throw new IllegalStateException(
concat("The JInternalFrame <", format(internalFrame), "> is not closable"));
}
public boolean isEnabled(Object sender) {
if (sender instanceof JDesktopPane) {
JDesktopPane dp = (JDesktopPane) sender;
String action = getName();
if (action == Actions.NEXT_FRAME || action == Actions.PREVIOUS_FRAME) {
return true;
}
JInternalFrame iFrame = dp.getSelectedFrame();
if (iFrame == null) {
return false;
} else if (action == Actions.CLOSE) {
return iFrame.isClosable();
} else if (action == Actions.MINIMIZE) {
return iFrame.isIconifiable();
} else if (action == Actions.MAXIMIZE) {
return iFrame.isMaximizable();
}
return true;
}
return false;
}