LemurLayoutCrashTest.java

package tests;

import com.jme3.app.SimpleApplication;
import com.jme3.math.Vector3f;
import com.jme3.system.AppSettings;
import com.simsilica.lemur.Button;
import com.simsilica.lemur.Command;
import com.simsilica.lemur.Container;
import com.simsilica.lemur.GuiGlobals;
import com.simsilica.lemur.Label;
import com.simsilica.lemur.TextField;
import com.simsilica.lemur.style.BaseStyles;

public class LemurLayoutCrashTest extends SimpleApplication {
    public static void main( String... args ) {
      LemurLayoutCrashTest main = new LemurLayoutCrashTest();
      
      AppSettings as = new AppSettings(true);
      as.setWidth(640);
      as.setHeight(480);
      main.setSettings(as);
      main.setShowSettings(false);
      
      main.start();
    }

    private TextField  tf;           

    @SuppressWarnings("unchecked")
    @Override
    public void simpleInitApp() {
        GuiGlobals.initialize(this);
        BaseStyles.loadGlassStyle();
        GuiGlobals.getInstance().getStyles().setDefaultStyle("glass");
        
        int iMargin=10;
        Container myWindow = new Container();
        myWindow.setName("myWindow");
        myWindow.setPreferredSize(new Vector3f(
            getContext().getSettings().getWidth()-iMargin*2,
            1,
            0)); //still crashes even if Z is set to 1 or 10
        guiNode.attachChild(myWindow);
        myWindow.setLocalTranslation(iMargin, getContext().getSettings().getHeight()-iMargin, 0);
        
        int iIndex=0;
        
        Label lbl = new Label("test");
        
        /**
         * click on any button to copy the textfield text to the label
         */
        for(int i=0;i<4;i++){
          Button clickMe = myWindow.addChild(new Button("Click Me "+i),0,iIndex++);
          clickMe.setName("clickMe"+i);
          clickMe.setPreferredSize(new Vector3f(50,1,0)); //buttons do not obbey it?
          clickMe.addClickCommands(new Command<Button>() {
              @Override
              public void execute( Button source ) {
                lbl.setText(tf.getText());
              }
          });
        }
        
        //enabling this will prevent the crash
        boolean bFixedLabelWidth=false;if(bFixedLabelWidth)lbl.setPreferredSize(new Vector3f(getContext().getSettings().getWidth()/2,1,0));
        lbl.setName("lbl");
        myWindow.addChild(lbl,0,iIndex++);
        
        /**
         * one character less on the text field and it will not crash
         */
        tf = new TextField("0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567");
        tf.setName("tf");
//        tf.setPreferredSize(new Vector3f(100,1,0)); //z 10 crash too
        tf.setPreferredWidth(100); //works fine!
        tf.setPreferredLineCount(1);
        myWindow.addChild(tf,0,iIndex++);
    }   
    
    @Override
    public void simpleUpdate(float tpf) {
      super.simpleUpdate(tpf);
      GuiGlobals.getInstance().requestFocus(tf);
      try{Thread.sleep(1000/60);}catch(Exception e){} //let GPU fan rest
    }
}