Question

我在程序中使用ControlP5 ListBox时遇到了一个奇怪的问题。我从ControlP5库的官方页面找到了一个ListBox使用示例：http://www.sojamo.de/libraries/controlP5/examples/controllers/ControlP5listBox/ControlP5listBox.pde我做了一些简单的更改，比如更改列表框的宽度和高度，设置不同的颜色。主要区别在于我使用字符串的数组列表来填充列表框。以下是此scetch的完整代码：

import javax.swing.*;
PFrame f;
public class PFrame extends JFrame {
  public SecondApplet s;
  public PFrame(int width, int height,ArrayList<String> companiesTxt) {
    setBounds(100, 100, width, height);
    s = new SecondApplet(companiesTxt);
    add(s);
    s.init();
    show();
  }
}
public class SecondApplet extends PApplet {
  ArrayList<String> companiesText;

ControlP5 cp5;

ListBox l;

ControlWindow controlWindow;
  SecondApplet(ArrayList<String> cmpTxt){
    companiesText = cmpTxt;
  }
  void setup(){
    size(400, 720);
    ControlP5.printPublicMethodsFor(ListBox.class);
    cp5 = new ControlP5(this);
    l = cp5.addListBox("myList")
         .setPosition(0, 0)
         .setSize(382, 720)
         .setItemHeight(18)
         .setBarHeight(18)
         .setColorBackground(color(243, 45,98))
         .setColorActive(color(0))
         .setColorForeground(color(255, 100,0))
         ;

  l.captionLabel().toUpperCase(true);
  l.captionLabel().set("Companies");
  l.captionLabel().setColor(0xffff0000);
  l.captionLabel().style().marginTop = 3;
  l.valueLabel().style().marginTop = 3;

  for (int i=0;i != companiesText.size();i++) {

    ListBoxItem lbi = l.addItem(companiesText.get(i), i);
    lbi.setColorBackground(color(243, 45,98));


  }
}

  void draw(){

  } 
}

当我尝试滚动此列表框时，我得到一个例外：

     java.lang.ArrayIndexOutOfBoundsException: 8217
at controlP5.BitFont.getGlyph(Unknown Source)
at processing.core.PGraphics.textCharImpl(PGraphics.java:4681)
at processing.core.PGraphics.textLineImpl(PGraphics.java:4669)
at processing.core.PGraphicsJava2D.textLineImpl(PGraphicsJava2D.java:1787)
at processing.core.PGraphics.textLineAlignImpl(PGraphics.java:4659)
at processing.core.PGraphics.text(PGraphics.java:4356)
at processing.core.PGraphics.text(PGraphics.java:4307)
at processing.core.PApplet.text(PApplet.java:13183)
at controlP5.ControlFont.draw(Unknown Source)
at controlP5.Label.draw(Unknown Source)
at controlP5.Label$SinglelineLabel.draw(Unknown Source)
at controlP5.Label.draw(Unknown Source)
at controlP5.Button$ButtonView.display(Unknown Source)
at controlP5.Button$ButtonView.display(Unknown Source)
at controlP5.Controller.draw(Unknown Source)
at controlP5.ControllerGroup.drawControllers(Unknown Source)
at controlP5.ControllerGroup.draw(Unknown Source)
at controlP5.ControllerGroup.drawControllers(Unknown Source)
at controlP5.ControllerGroup.draw(Unknown Source)
at controlP5.ControlWindow.draw(Unknown Source)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:1236)
at processing.core.PApplet$RegisteredMethods.handle(PApplet.java:1229)
at processing.core.PApplet.handleMethods(PApplet.java:1423)
at processing.core.PApplet.handleDraw(PApplet.java:2401)
at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:240)
at processing.core.PApplet.run(PApplet.java:2256)
at java.lang.Thread.run(Unknown Source)

我几乎绝望，因为我不明白在这种情况下会出现什么问题？拜托，你能给我任何建议吗？

Answer 1

问题解决了。我使用的是一些不是aschii字符的字符串。 GetGlyph函数如下所示：

public Glyph getGlyph(char c) {
   return glyphs[(int) (c)];
}

因此，当您想使用列表框将字符转换为aschii时：

 for (int i=0;i < companiesText.size();i++) {
      try{
          ListBoxItem lbi = l.addItem(newString(companiesText.get(i).getBytes("US-ASCII"),"US-ASCII"), i);
          lbi.setColorBackground(color(243, 45,98));
      }catch(Exception e){
      }
 }

使用ControlP5列表框进行处理

1 个答案: