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  JPanel - JList -> JScrollPane  (Read 964 times)
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Offline Phibedy

Junior Member


Medals: 2



« Posted 2012-06-23 01:33:09 »

Hi,
we got a list, that is to big, to be shown at once. That´s why we would like to replace it with a ScrollPane, but the ScrollPane never appears.
Could it be, that it isn´t possible use "this.setLayout(null);" in the construktor, some say, that I have to usw a Layout Manager, is that true?
best regards Phibedy
Offline Eli Delventhal
« League of Dukes »

JGO Kernel


Medals: 39
Projects: 12


Game Engineer


« Reply #1 - Posted 2012-06-23 01:43:28 »

You're right you can't do that. Just don't call setLayout() at all and it will use the default of a FlowLayout.

See my work:
OTC Software
Offline ReBirth
« Reply #2 - Posted 2012-06-23 10:39:31 »

By never appears, you mean the scroll bar? update the policies for both horizontal and vertical bars.

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Offline Phibedy

Junior Member


Medals: 2



« Reply #3 - Posted 2012-06-23 10:48:23 »

thx for for answers Smiley
@ Eli Delventhal: If I remove "setLayout" the buttons are centered on the top of the Jpanel  Huh
If I dont use Layout.set(null), what else should I do, to be able to set buttons on coordinates?

@ ReBirth: Yes I mean the scrollbar.
Offline ReBirth
« Reply #4 - Posted 2012-06-23 11:01:45 »

1  
scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

"scroller" is JScrollPane. You can set it to alwasy show.

Offline Phibedy

Junior Member


Medals: 2



« Reply #5 - Posted 2012-06-23 11:24:11 »

Thx, works great  Grin

But I got another problem:

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public static Icon getIcon(String path) {
      Icon icon = null;
      icon = new ImageIcon(path);
      System.out.println(path);
      return icon;
   }

At first, I call the method getIcon, after that, I replace the Icon in the directory and call the method again, but it always returns the old Icon not the one that I pasted.
If I don´t call it at first and replace the Icon in the directory and then call the method, it returns the new Icon that I pasted.
best regards Phibedy
Offline CaptainJester

JGO Knight


Medals: 10
Projects: 2


Make it work; make it better.


« Reply #6 - Posted 2012-06-23 13:20:13 »

You have to call invalidate() on your JFrame. The docs say to call validate() but it never works for me.

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