Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (542)
Games in Android Showcase (133)
games submitted by our members
Games in WIP (604)
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  
  KeyCode issue  (Read 796 times)
0 Members and 1 Guest are viewing this topic.
Offline AKMatt

Junior Newbie





« Posted 2011-09-01 03:07:12 »

Hi all, first post here.  New game programmer in general.

I'm working on a chat bar currently for a simple game project, and have run into an issue with KeyEvent processing.

Here is a snippet of relevant code:

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
public void keyTyped(KeyEvent e) {
        switch(e.getKeyCode()) {
            case KeyEvent.VK_LEFT:
                if(textCursorIndex > 0)
                    setTextCursorIndex(textCursorIndex-1);
                break;
            case KeyEvent.VK_RIGHT:
                if(textCursorIndex < text.length())
                    setTextCursorIndex(textCursorIndex+1);
                break;
            case KeyEvent.VK_BACK_SPACE:
                if(textCursorIndex > 0) {
                    textCursorIndex--;
                    removeChar();
                }
            case KeyEvent.VK_DELETE:
                if(textCursorIndex < text.length()) {
                    removeChar();
                }
                break;
            default:
                insertChar(text, e.getKeyChar(), textCursorIndex);
                break;
        }
    }


This works just fine on my Vaio, however, I am primarily working on an iMac with a nonstandard keyboard, and my "delete" key does not send a VK_DELETE or VK_BACKSPACE event.  The value for e.getKeyCode() when I press "delete" during debugging is "0", which is shared with spacebar.  If somebody could tell me how to account for nonstandard keyboards in key handling code, I would greatly appreciate it.

Thanks!
Offline ReBirth
« Reply #1 - Posted 2011-09-01 03:34:11 »

Quoted from KeyEvent API

Quote
# Not all keyboards or systems are capable of generating all virtual key codes. No attempt is made in Java to generate these keys artificially.
# Virtual key codes do not identify a physical key: they depend on the platform and keyboard layout. For example, the key that generates VK_Q when using a U.S. keyboard layout will generate VK_A when using a French keyboard layout.

I haven't worked on Mac OS. You can try getKeyChar() method and if see if they give different results.

Offline Eli Delventhal

JGO Kernel


Medals: 42
Projects: 11
Exp: 10 years


Game Engineer


« Reply #2 - Posted 2011-09-01 18:08:02 »

Hi all, first post here.  New game programmer in general.

I'm working on a chat bar currently for a simple game project, and have run into an issue with KeyEvent processing.

Here is a snippet of relevant code:

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
public void keyTyped(KeyEvent e) {
        switch(e.getKeyCode()) {
            case KeyEvent.VK_LEFT:
                if(textCursorIndex > 0)
                    setTextCursorIndex(textCursorIndex-1);
                break;
            case KeyEvent.VK_RIGHT:
                if(textCursorIndex < text.length())
                    setTextCursorIndex(textCursorIndex+1);
                break;
            case KeyEvent.VK_BACK_SPACE:
                if(textCursorIndex > 0) {
                    textCursorIndex--;
                    removeChar();
                }
            case KeyEvent.VK_DELETE:
                if(textCursorIndex < text.length()) {
                    removeChar();
                }
                break;
            default:
                insertChar(text, e.getKeyChar(), textCursorIndex);
                break;
        }
    }


This works just fine on my Vaio, however, I am primarily working on an iMac with a nonstandard keyboard, and my "delete" key does not send a VK_DELETE or VK_BACKSPACE event.  The value for e.getKeyCode() when I press "delete" during debugging is "0", which is shared with spacebar.  If somebody could tell me how to account for nonstandard keyboards in key handling code, I would greatly appreciate it.

Thanks!
That's odd, I haven't seen that issue before (and I dev on Mac). You can try using JInput, which works differently so would likely avoid this issue.

See my work:
OTC Software
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline AKMatt

Junior Newbie





« Reply #3 - Posted 2011-09-02 06:10:59 »

Thanks.  Yeah, I'll try JInput.
Offline Mads

JGO Ninja


Medals: 26
Projects: 3
Exp: 6 years


One for all!


« Reply #4 - Posted 2011-09-03 22:47:43 »

You can try to print what keycode the delete button sends out. At the initialization of the game, check for OS and bind keys accordingly.

Edit: ..Or JInput  persecutioncomplex

Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

Elsealabs (15 views)
2014-12-28 10:39:27

CopyableCougar4 (19 views)
2014-12-28 02:10:29

BurntPizza (24 views)
2014-12-27 22:38:51

Mr.CodeIt (14 views)
2014-12-27 04:03:04

TheDudeFromCI (19 views)
2014-12-27 02:14:49

Mr.CodeIt (26 views)
2014-12-23 03:34:11

rwatson462 (58 views)
2014-12-15 09:26:44

Mr.CodeIt (47 views)
2014-12-14 19:50:38

BurntPizza (96 views)
2014-12-09 22:41:13

BurntPizza (115 views)
2014-12-08 04:46:31
How do I start Java Game Development?
by gouessej
2014-12-27 19:41:21

Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50
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!