/*

  * Copyright (c) 2008-2012, Matthias Mann

  *

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *     * Redistributions of source code must retain the above copyright notice,

  *       this list of conditions and the following disclaimer.

  *     * Redistributions in binary form must reproduce the above copyright

  *       notice, this list of conditions and the following disclaimer in the

  *       documentation and/or other materials provided with the distribution.

  *     * Neither the name of Matthias Mann nor the names of its contributors may

  *       be used to endorse or promote products derived from this software

  *       without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package login;

 import de.matthiasmann.twl.Button;

 import de.matthiasmann.twl.DialogLayout;

 import de.matthiasmann.twl.EditField;

 import de.matthiasmann.twl.EditField.Callback;

 import de.matthiasmann.twl.Event;

 import de.matthiasmann.twl.FPSCounter;

 import de.matthiasmann.twl.GUI;

 import de.matthiasmann.twl.Label;

 import de.matthiasmann.twl.Timer;

 import de.matthiasmann.twl.Widget;

 import de.matthiasmann.twl.renderer.lwjgl.LWJGLRenderer;

 import de.matthiasmann.twl.theme.ThemeManager;

 import org.lwjgl.opengl.Display;

 import org.lwjgl.opengl.DisplayMode;

 import org.lwjgl.opengl.GL11;

 import test.TestUtils;

 /**

  * A simple login panel

  * 

  * @author Matthias Mann

  */

 public class LoginDemo extends Widget {

     public static void main(String[] args) {

         try {

             Display.setDisplayMode(new DisplayMode(800, 600));

             Display.create();

             Display.setTitle("TWL Login Panel Demo");

             Display.setVSyncEnabled(true);

             LoginDemo demo = new LoginDemo();

             LWJGLRenderer renderer = new LWJGLRenderer();

             GUI gui = new GUI(demo, renderer);

             demo.efName.requestKeyboardFocus();

             ThemeManager theme = ThemeManager.createThemeManager(

                     LoginDemo.class.getResource("login.xml"), renderer);

             gui.applyTheme(theme);

             while(!Display.isCloseRequested() && !demo.quit) {

                 GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

                 gui.update();

                 Display.update();

             }

             gui.destroy();

             theme.destroy();

         } catch (Exception ex) {

             TestUtils.showErrMsg(ex);

         }

         Display.destroy();

     }

     final FPSCounter fpsCounter;

     final DialogLayout loginPanel;

     final EditField efName;

     final EditField efPassword;

     final Button btnLogin;

     boolean quit;

     public LoginDemo() {

         fpsCounter = new FPSCounter();

         loginPanel = new DialogLayout();

         loginPanel.setTheme("login-panel");

         efName = new EditField();

         efName.addCallback(new Callback() {

             public void callback(int key) {

                 if(key == Event.KEY_RETURN) {

                     efPassword.requestKeyboardFocus();

                 }

             }

         });

         efPassword = new EditField();

         efPassword.setPasswordMasking(true);

         efPassword.addCallback(new Callback() {

             public void callback(int key) {

                 if(key == Event.KEY_RETURN) {

                     emulateLogin();

                 }

             }

         });

         Label lName = new Label("Name");

         lName.setLabelFor(efName);

         Label lPassword = new Label("Password");

         lPassword.setLabelFor(efPassword);

         btnLogin = new Button("LOGIN");

         btnLogin.addCallback(new Runnable() {

             public void run() {

                 emulateLogin();

             }

         });

         DialogLayout.Group hLabels = loginPanel.createParallelGroup(lName, lPassword);

         DialogLayout.Group hFields = loginPanel.createParallelGroup(efName, efPassword);

         DialogLayout.Group hBtn = loginPanel.createSequentialGroup()

                 .addGap()   // right align the button by using a variable gap

                 .addWidget(btnLogin);

         loginPanel.setHorizontalGroup(loginPanel.createParallelGroup()

                 .addGroup(loginPanel.createSequentialGroup(hLabels, hFields))

                 .addGroup(hBtn));

         loginPanel.setVerticalGroup(loginPanel.createSequentialGroup()

                 .addGroup(loginPanel.createParallelGroup(lName, efName))

                 .addGroup(loginPanel.createParallelGroup(lPassword, efPassword))

                 .addWidget(btnLogin));

         add(fpsCounter);

         add(loginPanel);

     }

     @Override

     protected void layout() {

         // fpsCounter is bottom right

         fpsCounter.adjustSize();

         fpsCounter.setPosition(

                 getInnerRight() - fpsCounter.getWidth(),

                 getInnerBottom() - fpsCounter.getHeight());

         // login panel is centered

         loginPanel.adjustSize();

         loginPanel.setPosition(

                 getInnerX() + (getInnerWidth() - loginPanel.getWidth())/2,

                 getInnerY() + (getInnerHeight() - loginPanel.getHeight())/2);

     }

     void emulateLogin() {

         GUI gui = getGUI();

         if(gui != null) {

             // step 1: disable all controls

             efName.setEnabled(false);

             efPassword.setEnabled(false);

             btnLogin.setEnabled(false);

             // step 2: get name & password from UI

             String name = efName.getText();

             String pasword = efPassword.getText();

             System.out.println("Name: " + name + " with a " + pasword.length() + " character password");

             // step 3: start a timer to simulate the process of talking to a remote server

             Timer timer = gui.createTimer();

             timer.setCallback(new Runnable() {

                 public void run() {

                     // once the timer fired re-enable the controls and clear the password

                     efName.setEnabled(true);

                     efPassword.setEnabled(true);

                     efPassword.setText("");

                     efPassword.requestKeyboardFocus();

                     btnLogin.setEnabled(true);

                 }

             });

             timer.setDelay(2500);

             timer.start();

             /* NOTE: in a real app you would need to keep a reference to the timer object

              * to cancel it if the user closes the dialog which uses the timer.

              * @see Widget#beforeRemoveFromGUI(de.matthiasmann.twl.GUI)

              */

         }

     }

 }