Java applications theme

[Aere Greenway]

On 06/25/2013 02:31 PM, Pierre Gobin wrote:
> Le 25/06/2013 21:55, Aere Greenway a écrit :
>> On 06/25/2013 01:23 PM, Pierre Gobin wrote:
>>> Hi all,
>>>
>>> I have a problem with Java applications in Lubuntu. When I use them, 
>>> they use the default Java theme (metal). How make them using Lubuntu 
>>> default theme (Lubuntu Box) ?
>>>
>>> I tried to modify the swing.properties as indicated here [1], but it 
>>> didn't change anything. Any idea ?
>>>
>>> Kind regards,
>>> Pierre GOBIN
>>>
>>> [1] 
>>> http://askubuntu.com/questions/21886/how-can-i-get-a-java-apps-to-use-the-gtk-theme
>>>
>> Pierre:
>>
>> I have overcome that default by using the GTK+ look-and-feel, which 
>> seems to be available in all of the Linux distributions I have tested.
>>
>> After doing that, my Java application uses the selected theme, as 
>> well as color customization.
>>
>
> Thanks. But exactly, I fail to use GTK+ look-and-feel. What do I need 
> to do to use it ?
>
Pierre:

Unfortunately, it's not simple (I wish it were).

I have cut-and-pasted some code snippets which hopefully can give you an 
idea of how to do it.  The code comes from a Java Swing application of mine.

--------------------------------------------------------------------------------------------------------------------------------------
// This code runs when the main dialog is shown.

             // Set up the look-and-feel.
             jComboBoxF1LookAndFeel.removeAllItems() ;
             String systemPLAF = UIManager.getSystemLookAndFeelClassName() ;
             jComboBoxF1LookAndFeel.addItem("cross-platform") ;
lafClassNames.add(UIManager.getCrossPlatformLookAndFeelClassName()) ;
             jComboBoxF1LookAndFeel.addItem("system") ;
             lafClassNames.add(systemPLAF) ;
             UIManager.LookAndFeelInfo [] installed = 
UIManager.getInstalledLookAndFeels() ;
             for (int lfIndex = 0 ; lfIndex < installed.length ; lfIndex++)
             {   // For each installed look-and-feel:
jComboBoxF1LookAndFeel.addItem(installed[lfIndex].getName()) ;
                 lafClassNames.add(installed[lfIndex].getClassName()) ;
             }
             LookAndFeel [] aux = UIManager.getAuxiliaryLookAndFeels() ;
             if (aux != null)
             {
                 for (int alfIndex = 0 ; alfIndex < aux.length ; alfIndex++)
                 {   // For each auxilliary look-and-feel:
jComboBoxF1LookAndFeel.addItem(aux[alfIndex].getName()) ;
lafClassNames.add(installed[alfIndex].getClassName()) ;
                 }
             }
jComboBoxF1LookAndFeel.setSelectedItem(DEFAULT_LOOK_AND_FEEL) ;
             lafIndex = jComboBoxF1LookAndFeel.getSelectedIndex() ;

--------------------------------------------------------------------------------------------------------------------------------------
// This is the code for processing state-changes of the LookAndFeel 
combo-box:

     private void jComboBoxF1LookAndFeelItemStateChanged(ItemEvent evt)
     {
         System.out.println("jComboBoxF1LookAndFeel.itemStateChanged, 
event="+evt);
         configValues.jComboBoxF1LookAndFeelValue = (String) 
jComboBoxF1LookAndFeel.getSelectedItem() ;
         lafIndex = jComboBoxF1LookAndFeel.getSelectedIndex() ;
         changeLookAndFeel() ;
     }

--------------------------------------------------------------------------------------------------------------------------------------
// This is the method that changes the look-and-feel

     private void changeLookAndFeel()
     {
         if (isInitialized && lafIndex >= 0)
         {   // We're initialized, and a  Look-and-Feel has been selected.
             try
             {
                 String selectedLafClass = (String) 
lafClassNames.get(lafIndex) ;
                 UIManager.setLookAndFeel(selectedLafClass) ;
SwingUtilities.updateComponentTreeUI(metricsDlg.jPanelMain) ;
SwingUtilities.updateComponentTreeUI(jTabbedPanelFunctionKeys.getParent()) ;
             }
             catch (Exception e)
             {
                 String exceptionType = e.toString() ;
                 int to = exceptionType.indexOf(":") ;
                 if (to > 0)
                     exceptionType = exceptionType.substring(0, to) ;
                 String message = "Unable to use " + 
jComboBoxF1LookAndFeel.getSelectedItem() +
                   " look-and-feel.\nClass=" + 
lafClassNames.get(lafIndex) + "\n" +
                   exceptionType ;
                 int result = JOptionPane.showConfirmDialog(null, message,
                   "Set Look-and-Feel", JOptionPane.OK_CANCEL_OPTION, 
JOptionPane.ERROR_MESSAGE) ;
                 if (result == JOptionPane.CANCEL_OPTION)
                 {
                     System.exit(1) ;
                 }
             }
         }
     }

-- 
Sincerely,
Aere