com.googlecode.gwt.test.internal.utils.RadioButtonManager Maven / Gradle / Ivy

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package com.googlecode.gwt.test.internal.utils;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import com.google.gwt.user.client.ui.RadioButton;
import com.googlecode.gwt.test.internal.AfterTestCallback;
import com.googlecode.gwt.test.internal.AfterTestCallbackManager;

/**
 * RadioButton instance Manager, to emulate radigroup behaviour. For internal use
 * only.
 * 
 * @author Gael Lazzari
 * 
 */
public class RadioButtonManager implements AfterTestCallback {

   private static RadioButtonManager INSTANCE;

   public static void beforeSetName(RadioButton rb, String newName) {

      Set rbs = get().getRadioButtons(rb);

      if (rbs == null) {
         // not attached, do nothing
         return;
      }

      // 1. remove from the old radiogroup
      rbs.remove(rb);

      // 3. register in the new radiogroup
      get().registerWithNewName(rb, newName);

   }

   public static RadioButtonManager get() {
      if (INSTANCE == null) {
         INSTANCE = new RadioButtonManager();
      }

      return INSTANCE;
   }

   public static void onLoad(RadioButton rb) {
      get().register(rb);
   }

   public static void onRadioGroupChanged(RadioButton rb, Boolean value, boolean fireEvents) {
      if (value != null && value) {
         Set rbs = get().getRadioButtons(rb);

         if (rbs == null) {
            // not attached, do nothing
            return;
         }
         for (RadioButton radioButton : rbs) {
            if (!rb.equals(radioButton) && radioButton.getValue()) {
               radioButton.setValue(false, fireEvents);
            }
         }
      }
   }

   public static void onUnload(RadioButton rb) {
      get().deregister(rb);
   }

   private final Map> map = new HashMap>();

   private RadioButtonManager() {
      AfterTestCallbackManager.get().registerCallback(this);
   }

   public void afterTest() {
      map.clear();
   }

   private void deregister(RadioButton rb) {
      Set rbs = getRadioButtons(rb);
      if (rbs != null) {
         rbs.remove(rb);
      }
   }

   private Set getRadioButtons(RadioButton rb) {
      if (!rb.isAttached()) {
         return null;
      }

      return getRadioButtons(rb.getName());
   }

   private Set getRadioButtons(String groupName) {
      Set set = map.get(groupName);
      if (set == null) {
         set = new HashSet();
         map.put(groupName, set);
      }

      return set;
   }

   private void register(RadioButton rb) {
      getRadioButtons(rb).add(rb);
   }

   private void registerWithNewName(RadioButton rb, String newName) {
      getRadioButtons(newName).add(rb);
   }

}