/*

 * 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)

             */

        }

    }

}