/**
* Used to indicate whether of not we are running in an environment where GUI interaction is
* available.
*
* <p>Note that this method is security checked and is not available to (for example) untrusted
* applets. More specifically, if there is a security manager, its <code>checkPropertiesAccess
* </code> method is called. This could result in a SecurityException.
*
* @param isGuiAvailable True if GUI interaction is available.
* @exception SecurityException if a security manager exists and its <code>checkPropertiesAccess
* </code> method doesn't allow setting of system properties.
* @see SecurityManager#checkPropertiesAccess
*/
public static void setGuiAvailable(boolean isGuiAvailable) throws SecurityException {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPropertiesAccess();
}
ThreadGroupContext.getContext().setGuiAvailable(isGuiAvailable);
}
/**
* Determines whether beans can assume a GUI is available.
*
* @return True if we are running in an environment where beans can assume that an interactive GUI
* is available, so they can pop up dialog boxes, etc. This will normally return true in a
* windowing environment, and will normally return false in a server environment or if an
* application is running as part of a batch job.
* @see Visibility
*/
public static boolean isGuiAvailable() {
return ThreadGroupContext.getContext().isGuiAvailable();
}
/**
* Test if we are in design-mode.
*
* @return True if we are running in an application construction environment.
* @see DesignMode
*/
public static boolean isDesignTime() {
return ThreadGroupContext.getContext().isDesignTime();
}
