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javafx
- From: Chris Vine <chris at cvine dot freeserve dot co dot uk>
- To: Kawa mailing list <kawa at sourceware dot org>
- Date: Sat, 13 May 2017 13:58:09 +0100
- Subject: javafx
- Authentication-results: sourceware.org; auth=none
There seems to be a problem with the 'javafx-scene' macro in kawa-2.4.
First, the example at
https://www.gnu.org/software/kawa/Building-JavaFX-applications.html#idm139760384873792
fails to size the button correctly when compared with kawa-2.1.9. The
same occurs with kawa-2.3 (I have not tested with kawa-2.2).
Curiously, taking this more complex example:
*****************
(require 'javafx-defs)
(javafx-application)
(javafx-scene
title: "Hello Button"
width: 600 height: 450
(Button
text: "Click Me"
layout-x: 25
layout-y: 40
on-action: (lambda (e) (format #t "Event: ~s~%~!" e)))
(Button
text: "Click Me 2"
layout-x: 25
layout-y: 70
on-action: (lambda (e) (format #t "Event: ~s~%~!" e)))
(Button
text: "Click Me 3"
layout-x: 25
layout-y: 100
on-action: (lambda (e) (format #t "Event: ~s~%~!" e))))
*****************
kawa-2.3 works correctly (the buttons are correctly sized), whereas
kawa-2.4 fails to run the code, with this error:
Exception in Application start method
java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$156(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast to javafx.scene.Node
at gnu.kawa.javafx.MakeScene.build(MakeScene.scm:54)
at javafx-test2.run(javafx-test2.kawa:10008)
at gnu.kawa.javafx.KawaJavafxApplication.start(defs.scm:65)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$163(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$176(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$50(GtkApplication.java:139)
... 1 more
If you avoid the javafx-scene macro, and set up the scene by hand,
all seems to work fine with any kawa-2 version.
Chris