dispose handlers not called when stop button pressed

Created by: jdf

In the following sketch, the dispose handler is called when the escape key is pressed, but not when the stop button is pressed.

dispose_bug

SampleLibrary s;
void setup() {
  size(200, 200, P3D);
  s = new SampleLibrary(this);
}

void draw() {
  background(255);
  fill(0);
  text("" + millis(), 20, 20);
}

SampleLibrary.java

import processing.core.*;

public class SampleLibrary {

  public SampleLibrary(PApplet parent) {
    parent.registerMethod("dispose", this);
  }

  public void dispose() {
    System.err.println("disposed!");
  }
}

首先在 Processing 中运行提供的 dispose_bug sketch，并比较按下 Escape 与按下停止按钮的情况。跟踪停止按钮的关闭路径以及 SampleLibrary.java 中显示的已注册 dispose 处理器；当以这两种方式停止 sketch 时处理器都会被调用，即表示完成。