Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (777)
Games in Android Showcase (231)
games submitted by our members
Games in WIP (856)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Swing / JScrollPane / setPrefferedSize question...  (Read 2549 times)
0 Members and 1 Guest are viewing this topic.
Offline Eli Delventhal

JGO Kernel


Medals: 42
Projects: 11
Exp: 10 years


Game Engineer


« Posted 2009-04-22 23:44:19 »

Hey all.

I've basically got code like this:

JFrame has a JScrollPane in it which contains a JPanel. All this is created, the JFrame is shown, user can do whatever they want. User chooses a menu item that loads in a background image to the JPanel. The JPanel does the code to load in the image, then it says setPreferredSize(image.width, image.height). Unfortunately, the JScrollBar refuses to recognize the difference change until I resize the window. Then once the window is resized, scroll bars appear within the JScrollPane.

Does anyone know of some sort of update method I can call on the JScrollBar or the JPanel (or anything, really) that will cause the JScrollBar to recognize that the preferred size of the JPanel changed?

Thanks.

See my work:
OTC Software
Offline CommanderKeith
« Reply #1 - Posted 2009-04-23 02:21:01 »

Try calling revalidate() on the JScrollPane.

All JComponents have that method (from memory...)

Offline JonathanC

Senior Newbie





« Reply #2 - Posted 2009-04-23 04:31:23 »

It might help you to see it in a larger context. This classic example helps:

How to Use Scroll Panes
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Eli Delventhal

JGO Kernel


Medals: 42
Projects: 11
Exp: 10 years


Game Engineer


« Reply #3 - Posted 2009-04-27 17:42:32 »

Revalidate did the job. Weird, because I thought I had tried that before. Thanks guys.

See my work:
OTC Software
Pages: [1]
  ignore  |  Print  
 
 

 
hadezbladez (331 views)
2018-11-16 13:46:03

hadezbladez (173 views)
2018-11-16 13:41:33

hadezbladez (329 views)
2018-11-16 13:35:35

hadezbladez (80 views)
2018-11-16 13:32:03

EgonOlsen (2171 views)
2018-06-10 19:43:48

EgonOlsen (2199 views)
2018-06-10 19:43:44

EgonOlsen (1375 views)
2018-06-10 19:43:20

DesertCoockie (2007 views)
2018-05-13 18:23:11

nelsongames (1644 views)
2018-04-24 18:15:36

nelsongames (2294 views)
2018-04-24 18:14:32
Deployment and Packaging
by mudlee
2018-08-22 18:09:50

Java Gaming Resources
by gouessej
2018-08-22 08:19:41

Deployment and Packaging
by gouessej
2018-08-22 08:04:08

Deployment and Packaging
by gouessej
2018-08-22 08:03:45

Deployment and Packaging
by philfrei
2018-08-20 02:33:38

Deployment and Packaging
by philfrei
2018-08-20 02:29:55

Deployment and Packaging
by philfrei
2018-08-19 23:56:20

Deployment and Packaging
by philfrei
2018-08-19 23:54:46
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!