Method handleTweak

java/src/processing/mode/java/JavaMode.java:126–178

Start a sketch in tweak mode

(Sketch sketch,
                            RunnerListener listener,
                            JavaEditor editor)

  /** Start a sketch in tweak mode */
  public Runner handleTweak(Sketch sketch,
                            RunnerListener listener,
                            JavaEditor editor) throws SketchException {
    // first try to build the unmodified code
    JavaBuild build = new JavaBuild(sketch);
//    String appletClassName = build.build(false);
    String appletClassName = build.build(true);
    if (appletClassName == null) {
      // unmodified build failed, so fail
      return null;
    }

    // if compilation passed, modify the code and build again
    // save the original sketch code of the user
    editor.initBaseCode();
    // check for "// tweak" comment in the sketch
    boolean requiresTweak = SketchParser.containsTweakComment(editor.baseCode);
    // parse the saved sketch to get all (or only with "//tweak" comment) numbers
    final SketchParser parser = new SketchParser(editor.baseCode, requiresTweak);

    // add our code to the sketch
    final boolean launchInteractive = editor.automateSketch(sketch, parser);

    build = new JavaBuild(sketch);
    appletClassName = build.build(false);

    if (appletClassName != null) {
      final Runner runtime = new Runner(build, listener);
      new Thread(() -> {
        runtime.launch(null);
        // next lines are executed when the sketch quits
        if (launchInteractive) {
          // fix swing deadlock issue: https://github.com/processing/processing/issues/3928
          EventQueue.invokeLater(() -> {
            editor.initEditorCode(parser.allHandles);
            editor.stopTweakMode(parser.allHandles);
          });
        }
      }).start();

      if (launchInteractive) {
        // fix swing deadlock issue: https://github.com/processing/processing/issues/3928
        EventQueue.invokeLater(() -> {
          // replace editor code with baseCode
          editor.initEditorCode(parser.allHandles);
          editor.updateInterface(parser.allHandles, parser.colorBoxes);
          editor.startTweakMode();
        });
      }
      return runtime;
    }
    return null;
  }


  public boolean handleExportApplication(Sketch sketch) throws SketchException, IOException {