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Java Forum / General / July 2006Save on exit
When a user clicks X on the window to exit, how do I set it up so that a function is executed before the window exits ? Basically, this is to give the user a "file not saved" warning before exiting. > When a user clicks X on the window to exit, how do I set it up so that > a function is executed before the window exits ? See <file:///F:/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)> HTH Andrew T. > > When a user clicks X on the window to exit, how do I set it up so that > > a function is executed before the window exits ? > > See > <file:///F:/docs/api/java/lang/Runtime.html#addShutdownHook(java.lang.Thread)> Or.. (polite cough) if you don't happen to be at my place, you might try.. <http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Runtime.html#addShutdownHook(j ava.lang.Thread)> Andrew T. Uggh.. it was only after reading the replies of moiristo and Oliver that I realised I had misunderstood your question. Andrew T. > When a user clicks X on the window to exit, how do I set it up so that > a function is executed before the window exits ? Basically, this is to > give the user a "file not saved" warning before exiting. Create a WindowListener > When a user clicks X on the window to exit, how do I set it up so that > a function is executed before the window exits ? Basically, this is to > give the user a "file not saved" warning before exiting. Use a Window Listener to listen for the WindowClosing or WindowClosed event: http://java.sun.com/j2se/1.5.0/docs/api/java/awt/event/WindowListener.html - Oliver > When a user clicks X on the window to exit, how do I set it up so that > a function is executed before the window exits ? Basically, this is to > give the user a "file not saved" warning before exiting. First, call this: myFrame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE); Then add a WindowListener to your frame and implement its windowClosed method. In that method is where you see if you need to save and respond appropriately. FWIW, you should probably go through the Swing tutorial Sun offers, since it covers relatively common topics like this. And you may also want to find the comp.lang.java.gui group, which is a better place to post GUI-related queries. = Steve =  SignatureSteve W. Jackson Montgomery, Alabama > First, call this: > > myFrame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE); Thanks, I just wanted to prevent people from closing without having to save. Now, the menu "quit" option must be used to exit and I can put the options on that. > > First, call this: > > [quoted text clipped - 3 lines] > save. Now, the menu "quit" option must be used to exit and I can put > the options on that. A well-behaved (make that "friendlier") application would still have a listener that would simply invoke the "quit" item you refer to, so that its action gets to the same code. SignatureSteve W. Jackson Montgomery, Alabama Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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