AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Associating user data with AWT/Swing component?          AppletTalk.com Forum Index -> Java GUI Toolkits View previous topic :: View next topic   Author Message Dr. Len Guest Posted: Thu Jun 17, 2004 12:17 pm    Post subject: Associating user data with AWT/Swing component? Hi NG, Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? I have multiple JTextFields in my JPanel, with the panel being their keylistener. In the KeyPressed, I would like to get component's user data like so: event.getComponent().getUserData(); TIA. Back to top ak Guest Posted: Thu Jun 17, 2004 12:35 pm    Post subject: Re: Associating user data with AWT/Swing component? Quote: Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? I have multiple JTextFields in my JPanel, with the panel being their keylistener. In the KeyPressed, I would like to get component's user data like so: event.getComponent().getUserData(); JComponent#getClientProperty(Object key) JComponent#putClientProperty(Object key, Object value) -- http://uio.dev.java.net Unified I/O for Java http://reader.imagero.com Java image reader Back to top Andrew Thompson Guest Posted: Thu Jun 17, 2004 12:38 pm    Post subject: Re: Associating user data with AWT/Swing component? On Thu, 17 Jun 2004 15:17:14 +0300, Dr. Len wrote: Quote: Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? What the heck are you talking about? What is the purpose of this 'Integer'? -- Andrew Thompson http://www.PhySci.org/ Open-source software suite http://www.PhySci.org/codes/ Web & IT Help http://www.1point1C.org/ Science & Technology Back to top Dr. Len Guest Posted: Fri Jun 18, 2004 8:08 am    Post subject: Re: Associating user data with AWT/Swing component? On Thu, 17 Jun 2004 14:35:12 +0200, "ak" <spam (AT) imagero (DOT) com> wrote: Quote: Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? I have multiple JTextFields in my JPanel, with the panel being their keylistener. In the KeyPressed, I would like to get component's user data like so: event.getComponent().getUserData(); JComponent#getClientProperty(Object key) JComponent#putClientProperty(Object key, Object value) Thanks, this is exactly what I was looking for. Back to top Frank D. Greco Guest Posted: Sun Aug 15, 2004 9:50 pm    Post subject: Re: Associating user data with AWT/Swing component? Dr. Len <len (AT) wohoo (DOT) org> sez: Quote: Hi NG, Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? I have multiple JTextFields in my JPanel, with the panel being their keylistener. In the KeyPressed, I would like to get component's user data like so: event.getComponent().getUserData(); Why not subclass your component and put the data within your subclass? Frank G. +==========================================+ Quote: Crossroads Technologies Inc. | www.CrossroadsTech dot com | fgreco at REMOVE!cross!roads!tech!dot!com| +=========================================+ Back to top zoopy Guest Posted: Sun Aug 15, 2004 11:34 pm    Post subject: Re: Associating user data with AWT/Swing component? On 17-6-2004 14:38, Andrew Thompson wrote: Quote: On Thu, 17 Jun 2004 15:17:14 +0300, Dr. Len wrote: Do Swing/AWT components have a simple facility for associating user data (Integer) with the component? What the heck are you talking about? What is the purpose of this 'Integer'? It's useful, for example, for the popup menu of a JTable with a JMenuItem to copy contents of a cell. The table's mouselistener updates, just before showing the popup menu, the menu item with the row and column on which was clicked [ copyMenuItem.putClientProperty(PROP_SEL_ROW, new Integer(selRow)); ...]. The menu item's action listener retrieves, if and when it is executed, their values [ copyMenuItem.getClientProperty(PROP_SEL_ROW); ... ], and thus knows which cell to copy. So, its a sort of parameter passing... (and it avoids declaring and "misusing" member variables for this purpose) Regards, Z. 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