package bluej.editor.moe;

import javafx.stage.Window;

import bluej.Config;
import bluej.utility.javafx.dialog.InputDialog;
import threadchecker.OnThread;
import threadchecker.Tag;




| Dialog for user to input a line number to traverse source file in editor
|
| @author Bruce Quig
|
@OnThread(Tag.FXPlatform)
public class GoToLineDialog extends InputDialog<Integer>{    
   private static final String goToLineTitle = Config.getString("editor.gotoline.title");
   
   private static final String goToLineLabel = Config.getString("editor.gotoline.label");
   
   private static final String notNumericMessage = Config.getString("editor.gotoline.notNumericMessage");
   
   private int rangeMax;

   
   public GoToLineDialog(Window parent)
   {
      super(goToLineTitle, goToLineLabel, Config.getString("editor.gotoline.prompt"), "goto-line-dialog");
      initOwner(parent);
      setOKEnabled(false);     
      }

   
   public void setRangeMax(int max)
   {        
      this.rangeMax = max;
      setPrompt(goToLineLabel +  " ( 1 - " + max + " )");     
      }

   
   @Override
   
   protected Integer convert(String number)
   {        
      try
       {
         return Integer.parseInt(number);         
         }
       
      catch (NumberFormatException e)
       {            
         return null;         
         }     
      }

   
   @Override
   
   protected boolean validate(String oldInput, String newInput)
   {
      Integer n = convert(newInput);
      if (n == null)
       {
         setErrorText(notNumericMessage);
         setOKEnabled(!oldInput.equals(""));
         return newInput.equals("");         
         }

      else if (n >= 1 && n <= rangeMax)
       {
         setErrorText("");
         setOKEnabled(true);
           
         return true;         
         }
       

      else
       {
         setErrorText("");
         setOKEnabled(!oldInput.equals(""));
           
         return false;         
         }     
      } 
   }