Re: JavaFX Example

[Matthieu Vachon <matthieu dot o dot vachon at gmail dot com>]

Here is my attempt at converting
http://docs.oracle.com/javafx/2/get_started/hello_world.htm to Kawa.

It compiles fine, but when run, I get this exception:

java.lang.RuntimeException: Exception in Application start method
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:403)
        at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
        at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.AbstractMethodError:
javafx.application.Application.start(Ljavafx/stage/Stage;)V
        at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
        at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:206)
        at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:173)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
        at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:73)
        ... 1 more

It seems my implementation of method `start` is not pick-up correctly.
Not sure what I did wrong though.

Regards,
Matt

On Wed, Nov 6, 2013 at 2:21 PM, Per Bothner <per@bothner.com> wrote:
> On 11/06/2013 10:35 AM, Tony West wrote:
>>
>> Hi.
>>
>> I can't work out how to write a JavaFX program in Kawa.
>>
>> I would like to write it without using any of the special
>> functions/macros Per has defined but rather just translate it as
>> directly as possible from a Java version.
>>
>> Can anyone provide me with an example of how to do this? eg just a simple
>> JavaFX hello world?
>
>
> I'd start with a Java program that did what I wanted, and then convert
> each class to a define-simple-class.
>
> A variation is to pick the "main class" - perhaps whatever class extends
> Application.  Then make that be the "module class".  I.e. the methods
> in that class become the top-level functions; you add a (module-extends
> XXX);
> and so on.  See http://www.gnu.org/software/kawa/Module-classes.html
> This is essentially what the javafx-application - it expands to (among
> other stuff)  (module-extends KawaJavafxApplication), but instead you can
> do:
>   (module-extends javafx.application.Application)
> and then define:
>   (define (start (stage ::javafx.stage.Stage))::void
>      ... actions ...)
>
> It's been a while since I looked closely s this - have you run into
> problems trying this?
> --
>         --Per Bothner
> per@bothner.com   http://per.bothner.com/

Attachment: hello-world.scm
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