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<h1 class="page">Laying Out the GUI in Java</h1>
<div id="preamble">
<div class="sectionbody">
<div class="olist arabic">
<ol class="arabic">
<li>
<p><a href="nifty_gui.html" class="page">Nifty GUI Concepts</a></p>
</li>
<li>
<p><a href="nifty_gui_best_practices.html" class="page">Nifty GUI Best Practices</a></p>
</li>
<li>
<p><a href="nifty_gui_xml_layout.html" class="page">Nifty GUI XML Layout</a> or <strong>Nifty <abbr title="Graphical User Interface">GUI</abbr> Java Layout</strong></p>
</li>
<li>
<p><a href="nifty_gui_overlay.html" class="page">Nifty GUI Overlay</a> or <a href="nifty_gui_projection.html" class="page">Nifty GUI Projection</a></p>
</li>
<li>
<p><a href="nifty_gui_java_interaction.html" class="page">Interact with the GUI from Java</a></p>
</li>
</ol>
</div>
<div class="paragraph">
<p>You can &#8220;draw&#8221; the <abbr title="Graphical User Interface">GUI</abbr> to the screen by writing Java code – alternatively to using XML. Typically you lay out the static base <abbr title="Graphical User Interface">GUI</abbr> in XML, and use Java commands if you need to change the <abbr title="Graphical User Interface">GUI</abbr> dynamically at runtime. In theory, you can also lay out the whole <abbr title="Graphical User Interface">GUI</abbr> in Java (but we don&#8217;t cover that here).</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="sample-code"><a class="anchor" href="#sample-code"></a>Sample Code</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Sample project</p>
</div>
<div class="ulist">
<ul>
<li>
<p><strong>Original Source Code:</strong> <a href="https://github.com/nifty-gui/nifty-gui/tree/1.4/nifty-examples/src/main/java/de/lessvoid/nifty/examples/defaultcontrols">/nifty-examples/src/main/java/de/lessvoid/nifty/examples/defaultcontrols/</a>.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Just so you get a quick picture what Nifty <abbr title="Graphical User Interface">GUI</abbr>'s Java Syntax looks like, here is the most basic example. It creates a screen with a layer and a panel that contains a button.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package mygame;

import com.jme3.app.Application;
import com.jme3.app.SimpleApplication;
import com.jme3.app.state.BaseAppState;
import com.jme3.niftygui.NiftyJmeDisplay;
import de.lessvoid.nifty.Nifty;
import de.lessvoid.nifty.builder.LayerBuilder;
import de.lessvoid.nifty.builder.PanelBuilder;
import de.lessvoid.nifty.builder.ScreenBuilder;
import de.lessvoid.nifty.controls.button.builder.ButtonBuilder;
import de.lessvoid.nifty.screen.DefaultScreenController;

public class MyStartScreen extends BaseAppState {

    @Override
    protected void initialize(Application app) {
        //It is technically safe to do all initialization and cleanup in the
        //onEnable()/onDisable() methods. Choosing to use initialize() and
        //cleanup() for this is a matter of performance specifics for the
        //implementor.
        //TODO: initialize your AppState, e.g. attach spatials to rootNode
    }

    @Override
    protected void cleanup(Application app) {
        //TODO: clean up what you initialized in the initialize method,
        //e.g. remove all spatials from rootNode
    }

    //onEnable()/onDisable() can be used for managing things that should
    //only exist while the state is enabled. Prime examples would be scene
    //graph attachment or input listener attachment.
    @Override
    protected void onEnable() {
        NiftyJmeDisplay niftyDisplay = NiftyJmeDisplay.newNiftyJmeDisplay(
                getApplication().getAssetManager(),
                getApplication().getInputManager(),
                getApplication().getAudioRenderer(),
                getApplication().getGuiViewPort());

        Nifty nifty = niftyDisplay.getNifty();
        getApplication().getGuiViewPort().addProcessor(niftyDisplay);
        ((SimpleApplication) getApplication()).getFlyByCamera().setDragToRotate(true);

        nifty.loadStyleFile("nifty-default-styles.xml");
        nifty.loadControlFile("nifty-default-controls.xml");

        // &lt;screen&gt;
        nifty.addScreen("Screen_ID", new ScreenBuilder("Hello Nifty Screen"){{
            controller(new DefaultScreenController()); // Screen properties

            // &lt;layer&gt;
            layer(new LayerBuilder("Layer_ID") {{
                childLayoutVertical(); // layer properties, add more...

                // &lt;panel&gt;
                panel(new PanelBuilder("Panel_ID") {{
                   childLayoutCenter(); // panel properties, add more...

                    // GUI elements
                    control(new ButtonBuilder("Button_ID", "Hello Nifty"){{
                        alignCenter();
                        valignCenter();
                        height("5%");
                        width("15%");
                    }});

                    //.. add more GUI elements here

                }});
                // &lt;/panel&gt;
              }});
            // &lt;/layer&gt;
          }}.build(nifty));
        // &lt;/screen&gt;

        nifty.gotoScreen("Screen_ID"); // start the screen
    }

    @Override
    protected void onDisable() {
        //Called when the state was previously enabled but is now disabled
        //either because setEnabled(false) was called or the state is being
        //cleaned up.
    }

    @Override
    public void update(float tpf) {
        //TODO: implement behavior during runtime
    }

}</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="implement-your-gui-layout"><a class="anchor" href="#implement-your-gui-layout"></a>Implement Your GUI Layout</h2>
<div class="sectionbody">
<div class="imageblock text-left">
<div class="content">
<img src="../../_images/jme3/advanced/gui-layout-draft.png" alt="gui-layout-draft.png" width="" height="">
</div>
</div>
<div class="paragraph">
<p>In this tutorial, you recreate the same screen as in the <a href="nifty_gui_xml_layout.html" class="page">Laying out the GUI in XML</a> example.</p>
</div>
<div class="paragraph">
<p>Create an Screen.Java file that extends BaseAppState in the mygame directory of your project. One Java file can contain several, or even all screens. As a reminder: Nifty displays one screen at a time; a screen contains several layers on top of one another; each layer contains panels that are embedded into another; the panels contain the actual content (text, images, or controls).</p>
</div>
<div class="paragraph">
<p>Next, setup your Nifty display.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">NiftyJmeDisplay niftyDisplay = NiftyJmeDisplay.newNiftyJmeDisplay(
        getApplication().getAssetManager(),
        getApplication().getInputManager(),
        getApplication().getAudioRenderer(),
        getApplication().getGuiViewPort());

Nifty nifty = niftyDisplay.getNifty();
getApplication().getGuiViewPort().addProcessor(niftyDisplay);
((SimpleApplication) getApplication()).getFlyByCamera().setDragToRotate(true);

nifty.loadStyleFile("nifty-default-styles.xml");
nifty.loadControlFile("nifty-default-controls.xml");

// &lt;!-- ... --&gt;

nifty.gotoScreen("start"); // start the screen</code></pre>
</div>
</div>
<div class="sect2">
<h3 id="make-screens"><a class="anchor" href="#make-screens"></a>Make Screens</h3>
<div class="paragraph">
<p>The following minimal Java file contains a start screen and a HUD screen. (Neither has been defined yet.)</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.addScreen("start", new ScreenBuilder("start") {{
    controller(new DefaultScreenController());
    // &lt;!-- ... --&gt;
}}.build(nifty));

nifty.addScreen("hud", new ScreenBuilder("hud") {{
    controller(new DefaultScreenController());
    // &lt;!-- ... --&gt;
}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>Every Nifty <abbr title="Graphical User Interface">GUI</abbr> must have a start screen. The others (in this example, the HUD screen) are optional.</p>
</div>
</div>
<div class="sect2">
<h3 id="make-layers"><a class="anchor" href="#make-layers"></a>Make Layers</h3>
<div class="paragraph">
<p>The following Java code shows how we add layers to the start screen and HUD screen. Add the following to your <code>Screen.java</code> file:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.addScreen("start", new ScreenBuilder("start") {{
    controller(new DefaultScreenController());
    // layer added
    layer(new LayerBuilder("background") {{
        childLayoutCenter();
        backgroundColor("#000f");

        // &lt;!-- ... --&gt;
    }});

    layer(new LayerBuilder("foreground") {{
        childLayoutVertical();
        backgroundColor("#0000");

        // &lt;!-- ... --&gt;
    }});
    // layer added

}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>Repeat the same, but use</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code>nifty.addScreen("hud", new ScreenBuilder("hud"){{</code></pre>
</div>
</div>
<div class="paragraph">
<p>for the HUD screen.</p>
</div>
<div class="paragraph">
<p>In a layer, you can now add panels and arrange them. Panels are containers that mark the areas where you want to display text, images, or controls (buttons etc) later.</p>
</div>
</div>
<div class="sect2">
<h3 id="make-panels"><a class="anchor" href="#make-panels"></a>Make Panels</h3>
<div class="paragraph">
<p>A panel is the inner-most container (that will contain the actual content: text, images, or controls). You place panels inside layers. The following panels go into in the <code>start</code> screen <code>foreground</code> layer:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.addScreen("start", new ScreenBuilder("start") {{
    controller(new DefaultScreenController());
    // layer added
    layer(new LayerBuilder("background") {{
        childLayoutCenter();
        backgroundColor("#000f");

        // &lt;!-- ... --&gt;
    }});

    layer(new LayerBuilder("foreground") {{
        childLayoutVertical();
        backgroundColor("#0000");

        // panel added
        panel(new PanelBuilder("panel_top") {{
            childLayoutCenter();
            alignCenter();
            backgroundColor("#f008");
            height("25%");
            width("75%");
        }});

        panel(new PanelBuilder("panel_mid") {{
            childLayoutCenter();
            alignCenter();
            backgroundColor("#0f08");
            height("50%");
            width("75%");
        }});

        panel(new PanelBuilder("panel_bottom") {{
            childLayoutHorizontal();
            alignCenter();
            backgroundColor("#00f8");
            height("25%");
            width("75%");

            panel(new PanelBuilder("panel_bottom_left") {{
                childLayoutCenter();
                valignCenter();
                backgroundColor("#44f8");
                height("50%");
                width("50%");
            }});

            panel(new PanelBuilder("panel_bottom_right") {{
                childLayoutCenter();
                valignCenter();
                backgroundColor("#88f8");
                height("50%");
                width("50%");
            }});
        }}); // panel added
    }});
    // layer added

}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>The following panels go into in the <code>hud</code> screen:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-Java hljs" data-lang="Java">nifty.addScreen("hud", new ScreenBuilder("hud") {{
    controller(new DefaultScreenController());

    layer(new LayerBuilder("background") {{
        childLayoutCenter();
        backgroundColor("#000f");
        // &lt;!-- ... --&gt;
    }});

    layer(new LayerBuilder("foreground") {{
        childLayoutHorizontal();
        backgroundColor("#0000");

        // panel added
        panel(new PanelBuilder("panel_left") {{
            childLayoutVertical();
            backgroundColor("#0f08");
            height("100%");
            width("80%");
            // &lt;!-- spacer --&gt;
        }});

        panel(new PanelBuilder("panel_right") {{
            childLayoutVertical();
            backgroundColor("#00f8");
            height("100%");
            width("20%");

            panel(new PanelBuilder("panel_top_right1") {{
                childLayoutCenter();
                backgroundColor("#00f8");
                height("15%");
                width("100%");
            }});

            panel(new PanelBuilder("panel_top_right2") {{
                childLayoutCenter();
                backgroundColor("#44f8");
                height("15%");
                width("100%");
            }});

            panel(new PanelBuilder("panel_bot_right") {{
                childLayoutCenter();
                valignCenter();
                backgroundColor("#88f8");
                height("70%");
                width("100%");
            }});
        }}); // panel added
    }});
}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>Try the sample. Remember to activate a screen using <code>nifty.gotoScreen("start");</code> or <code>hud</code> respectively.
The result should look as follows:</p>
</div>
<div class="imageblock text-center">
<div class="content">
<img src="../../_images/jme3/advanced/nifty-gui-panels.png" alt="nifty-gui-panels.png" width="" height="">
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="adding-content-to-panels"><a class="anchor" href="#adding-content-to-panels"></a>Adding Content to Panels</h2>
<div class="sectionbody">
<div class="paragraph">
<p>See also <a href="https://github.com/nifty-gui/nifty-gui/raw/1.4/nifty-core/manual/nifty-gui-the-manual-1.3.2.pdf">Nifty GUI - the Manual: Layouts</a> on the Nifty <abbr title="Graphical User Interface">GUI</abbr> site.</p>
</div>
<div class="sect2">
<h3 id="add-images"><a class="anchor" href="#add-images"></a>Add Images</h3>
<div class="paragraph">
<p>The <code>start-background.png</code> image is a fullscreen background picture. In the <code>start</code> screen, add the following image element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.addScreen("start", new ScreenBuilder("start") {{
    controller(new DefaultScreenController());
    // layer added
    layer(new LayerBuilder("background") {{
        childLayoutCenter();
        backgroundColor("#000f");

        // add image
        image(new ImageBuilder() {{
            filename("Interface/start-background.png");
        }});
    }});
    // &lt;!-- ... --&gt;
}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>The <code>hud-frame.png</code> image is a transparent frame that we use as HUD decoration. In the <code>hud</code> screen, add the following image element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.addScreen("hud", new ScreenBuilder("hud") {{
    controller(new DefaultScreenController());

    layer(new LayerBuilder("background") {{
        childLayoutCenter();
        backgroundColor("#000f");

        // add image
        image(new ImageBuilder() {{
            filename("Interface/hud-frame.png");
        }});
    }});
    // &lt;!-- ... --&gt;
}}.build(nifty));</code></pre>
</div>
</div>
<div class="paragraph">
<p>The <code>face1.png</code> image is an image that you want to use as a status icon.
In the <code>hud</code> screens <code>foreground</code> layer, add the following image element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">panel(new PanelBuilder("panel_top_right2") {{
    childLayoutCenter();
    backgroundColor("#44f8");
    height("15%");
    width("100%");

    // add image
    image(new ImageBuilder() {{
        filename("Interface/face1.png");
        valignCenter();
        alignCenter();
        height("50%");
        width("30%");
    }});
}});</code></pre>
</div>
</div>
<div class="paragraph">
<p>This image is scaled to use 50% of the height and 30% of the width of its container.</p>
</div>
</div>
<div class="sect2">
<h3 id="add-static-text"><a class="anchor" href="#add-static-text"></a>Add Static Text</h3>
<div class="paragraph">
<p>The game title is a typical example of static text. In the <code>start</code> screen <code>foreground</code> layer, add the following text element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">// panel added
panel(new PanelBuilder("panel_top") {{
    childLayoutCenter();
    alignCenter();
    backgroundColor("#f008");
    height("25%");
    width("75%");

    text(new TextBuilder() {{
        text("My Cool Game");
        font("Interface/Fonts/Default.fnt");
        height("100%");
        width("100%");
    }});
}});</code></pre>
</div>
</div>
<div class="paragraph">
<p>For longer pieces of static text, such as an introduction, you can use <code>wrap="true"</code>. Setting <code>wrap="true"</code> will only work when you set a width for the text element, so that Nifty knows when to wrap a line. Add the following text element to the <code>Start</code> screen <code>foreground</code> layer:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">panel(new PanelBuilder("panel_mid") {{
    childLayoutCenter();
    alignCenter();
    backgroundColor("#0f08");
    height("50%");
    width("75%");

    // add text
    text(new TextBuilder() {{
        text("Here goes some text describing the game and the rules and stuff. "
           + "Incidentally, the text is quite long and needs to wrap at the end of lines.");
        font("Interface/Fonts/Default.fnt");
        wrap(true);
        height("100%");
        width("100%");
    }});
}});</code></pre>
</div>
</div>
<div class="paragraph">
<p>The font used is jME3&#8217;s default font &#8220;Interface/Fonts/Default.fnt&#8221; which is included in the jMonkeyEngine.JAR. You can add your own fonts to your own <code>assets/Interface</code> directory. Set your font to the one you created during the start of the <a href="nifty_gui_xml_layout.html#implement-your-gui-layout#" class="page">Gui Implementation</a> phase of your game.</p>
</div>
</div>
<div class="sect2">
<h3 id="add-controls"><a class="anchor" href="#add-controls"></a>Add Controls</h3>
<div class="paragraph">
<p>Before you can use any control, you must load a Control Definition first. Thats why we add the following two lines <em>before</em> the screen definitions:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.loadStyleFile("nifty-default-styles.xml");
nifty.loadControlFile("nifty-default-controls.xml");</code></pre>
</div>
</div>
<div class="sect3">
<h4 id="label-control"><a class="anchor" href="#label-control"></a>Label Control</h4>
<div class="paragraph">
<p>Use label controls for text that you want to edit dynamically from Java. One example for this is the score display.
In the <code>hud</code> screen&#8217;s <code>foreground</code> layer, add the following text element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">panel(new PanelBuilder("panel_top_right1") {{
    childLayoutCenter();
    backgroundColor("#00f8");
    height("15%");
    width("100%");

    control(new LabelBuilder(){{
        color("#000");
        text("123");
        width("100%");
        height("100%");
    }});
}});</code></pre>
</div>
</div>
<div class="paragraph">
<p>Note that the width and height do not scale the bitmap font, but make indirectly certain it is centered. If you want a different size for the font, you need to provide an extra bitmap font (they come with fixes sizes and don&#8217;t scale well).</p>
</div>
</div>
<div class="sect3">
<h4 id="button-control"><a class="anchor" href="#button-control"></a>Button Control</h4>
<div class="paragraph">
<p>Our <abbr title="Graphical User Interface">GUI</abbr> plan asks for two buttons on the start screen. You add the Start and Quit buttons to the bottom panel of the <code>start</code> screen using the <code>&lt;control&gt;</code> element:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">panel(new PanelBuilder("panel_bottom_left") {{
    childLayoutCenter();
    valignCenter();
    backgroundColor("#44f8");
    height("50%");
    width("50%");

    // add control
    control(new ButtonBuilder("StartButton", "Start") {{
        alignCenter();
        valignCenter();
        height("50%");
        width("50%");
    }});
}});

panel(new PanelBuilder("panel_bottom_right") {{
    childLayoutCenter();
    valignCenter();
    backgroundColor("#88f8");
    height("50%");
    width("50%");

    // add control
    control(new ButtonBuilder("QuitButton", "Quit") {{
        alignCenter();
        valignCenter();
        height("50%");
        width("50%");
    }});
}});</code></pre>
</div>
</div>
<div class="paragraph">
<p>Note that these controls don&#8217;t do anything yet – we&#8217;ll get to that soon.</p>
</div>
</div>
<div class="sect3">
<h4 id="other-controls"><a class="anchor" href="#other-controls"></a>Other Controls</h4>
<div class="paragraph">
<p>Nifty additionally offers many customizable controls such as check boxes, text fields, menus, chats, tabs, …</p>
</div>
<div class="paragraph">
<p>See also:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="https://github.com/nifty-gui/nifty-gui/raw/1.4/nifty-core/manual/nifty-gui-the-manual-1.3.2.pdf">Nifty GUI - the Manual: Elements</a></p>
</li>
<li>
<p><a href="https://github.com/nifty-gui/nifty-gui/wiki/Controls">Controls</a></p>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="intermediate-result"><a class="anchor" href="#intermediate-result"></a>Intermediate Result</h2>
<div class="sectionbody">
<div class="paragraph">
<p>When you preview this code in the jMonkeyEngine SDK, our tutorial demo should looks as follows: A start screen with two buttons, and a game screen with a simple HUD frame and a blue cube (which stands for any jME3 game content).</p>
</div>
<div class="admonitionblock tip">
<table>
<tr>
<td class="icon">
<i class="fa icon-tip" title="Tip"></i>
</td>
<td class="content">
Remove all lines that set background colors, you only needed them to see the arrangement.
</td>
</tr>
</table>
</div>
<div class="imageblock text-center">
<div class="content">
<img src="../../_images/jme3/advanced/nifty-gui-simple-demo.png" alt="nifty-gui-simple-demo.png" width="" height="">
</div>
</div>
<div class="paragraph">
<p>Your <code>Screen.java</code> file should look like this:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package mygame;

import com.jme3.app.Application;
import com.jme3.app.SimpleApplication;
import com.jme3.app.state.BaseAppState;
import com.jme3.niftygui.NiftyJmeDisplay;
import de.lessvoid.nifty.Nifty;
import de.lessvoid.nifty.builder.ImageBuilder;
import de.lessvoid.nifty.builder.LayerBuilder;
import de.lessvoid.nifty.builder.PanelBuilder;
import de.lessvoid.nifty.builder.ScreenBuilder;
import de.lessvoid.nifty.builder.TextBuilder;
import de.lessvoid.nifty.controls.button.builder.ButtonBuilder;
import de.lessvoid.nifty.controls.label.builder.LabelBuilder;
import de.lessvoid.nifty.screen.DefaultScreenController;

public class Screen extends BaseAppState {

    @Override
    protected void initialize(Application app) {
        //It is technically safe to do all initialization and cleanup in the
        //onEnable()/onDisable() methods. Choosing to use initialize() and
        //cleanup() for this is a matter of performance specifics for the
        //implementor.
        //TODO: initialize your AppState, e.g. attach spatials to rootNode
    }

    @Override
    protected void cleanup(Application app) {
        //TODO: clean up what you initialized in the initialize method,
        //e.g. remove all spatials from rootNode
    }

    //onEnable()/onDisable() can be used for managing things that should
    //only exist while the state is enabled. Prime examples would be scene
    //graph attachment or input listener attachment.
    @Override
    protected void onEnable() {
        NiftyJmeDisplay niftyDisplay = NiftyJmeDisplay.newNiftyJmeDisplay(
                getApplication().getAssetManager(),
                getApplication().getInputManager(),
                getApplication().getAudioRenderer(),
                getApplication().getGuiViewPort());

        Nifty nifty = niftyDisplay.getNifty();
        getApplication().getGuiViewPort().addProcessor(niftyDisplay);
        ((SimpleApplication) getApplication()).getFlyByCamera().setDragToRotate(true);

        nifty.loadStyleFile("nifty-default-styles.xml");
        nifty.loadControlFile("nifty-default-controls.xml");

        nifty.addScreen("start", new ScreenBuilder("start") {{
            controller(new DefaultScreenController());
            // layer added
            layer(new LayerBuilder("background") {{
                childLayoutCenter();
//                backgroundColor("#000f");

                // add image
                image(new ImageBuilder() {{
                    filename("Interface/start-background.png");
                }});
            }});

            layer(new LayerBuilder("foreground") {{
                childLayoutVertical();
//                backgroundColor("#0000");

                // panel added
                panel(new PanelBuilder("panel_top") {{
                    childLayoutCenter();
                    alignCenter();
//                    backgroundColor("#f008");
                    height("25%");
                    width("75%");

                    text(new TextBuilder() {{
                        text("My Cool Game");
                        font("Interface/Fonts/Arial.fnt");
                        height("100%");
                        width("100%");
                    }});
                }});

                panel(new PanelBuilder("panel_mid") {{
                    childLayoutCenter();
                    alignCenter();
//                    backgroundColor("#0f08");
                    height("50%");
                    width("75%");

                    // add text
                    text(new TextBuilder() {{
                        text("Here goes some text describing the game and the rules and stuff. "
                           + "Incidentally, the text is quite long and needs to wrap at the end of lines. ");
                        font("Interface/Fonts/Arial.fnt");
                        wrap(true);
                        height("100%");
                        width("100%");
                    }});
                }});

                panel(new PanelBuilder("panel_bottom") {{
                    childLayoutHorizontal();
                    alignCenter();
//                    backgroundColor("#00f8");
                    height("25%");
                    width("75%");

                    panel(new PanelBuilder("panel_bottom_left") {{
                        childLayoutCenter();
                        valignCenter();
//                        backgroundColor("#44f8");
                        height("50%");
                        width("50%");

                        // add control
                        control(new ButtonBuilder("StartButton", "Start") {{
                            alignCenter();
                            valignCenter();
                            height("50%");
                            width("50%");
                        }});
                    }});

                    panel(new PanelBuilder("panel_bottom_right") {{
                        childLayoutCenter();
                        valignCenter();
//                        backgroundColor("#88f8");
                        height("50%");
                        width("50%");

                        // add control
                        control(new ButtonBuilder("QuitButton", "Quit") {{
                            alignCenter();
                            valignCenter();
                            height("50%");
                            width("50%");
                        }});
                    }});
                }}); // panel added
            }});
            // layer added

        }}.build(nifty));

        nifty.addScreen("hud", new ScreenBuilder("hud") {{
            controller(new DefaultScreenController());

            layer(new LayerBuilder("background") {{
                childLayoutCenter();
//                backgroundColor("#000f");

                // add image
                image(new ImageBuilder() {{
                    filename("Interface/hud-frame.png");
                }});
            }});

            layer(new LayerBuilder("foreground") {{
                childLayoutHorizontal();
//                backgroundColor("#0000");

                // panel added
                panel(new PanelBuilder("panel_left") {{
                    childLayoutVertical();
//                    backgroundColor("#0f08");
                    height("100%");
                    width("80%");
                    // &lt;!-- spacer --&gt;
                }});

                panel(new PanelBuilder("panel_right") {{
                    childLayoutVertical();
//                    backgroundColor("#00f8");
                    height("100%");
                    width("20%");

                    panel(new PanelBuilder("panel_top_right1") {{
                        childLayoutCenter();
//                        backgroundColor("#00f8");
                        height("15%");
                        width("100%");

                        control(new LabelBuilder(){{
                            color("#000");
                            text("123");
                            width("100%");
                            height("100%");
                        }});
                    }});

                    panel(new PanelBuilder("panel_top_right2") {{
                        childLayoutCenter();
//                        backgroundColor("#44f8");
                        height("15%");
                        width("100%");

                        // add image
                        image(new ImageBuilder() {{
                            filename("Interface/face1.png");
                            valignCenter();
                            alignCenter();
                            height("50%");
                            width("30%");
                        }});
                    }});

                    panel(new PanelBuilder("panel_bot_right") {{
                        childLayoutCenter();
                        valignCenter();
//                        backgroundColor("#88f8");
                        height("70%");
                        width("100%");
                    }});
                }}); // panel added
            }});
        }}.build(nifty));

        nifty.gotoScreen("hud"); // start the screen

    }

    @Override
    protected void onDisable() {
        //Called when the state was previously enabled but is now disabled
        //either because setEnabled(false) was called or the state is being
        //cleaned up.
    }

    @Override
    public void update(float tpf) {
        //TODO: implement behavior during runtime
    }

}</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="nifty-java-settings"><a class="anchor" href="#nifty-java-settings"></a>Nifty Java Settings</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Before initializing the nifty screens, you set up properties and register media.</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Nifty Method</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>registerSound("mysound", "Interface/abc.wav");</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>registerMusic("mymusic", "Interface/xyz.ogg");</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>registerMouseCursor("mypointer", "Interface/abc.png", 5, 4);</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>registerEffect(?);</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>?</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>setDebugOptionPanelColors(true);</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>Highlight all panels, makes it easier to arrange them.</p>
</div></div></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>Example:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">nifty.registerMouseCursor("hand", "Interface/mouse-cursor-hand.png", 5, 4);</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="next-steps"><a class="anchor" href="#next-steps"></a>Next Steps</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Integrate the <abbr title="Graphical User Interface">GUI</abbr> into the game. Typically, you will overlay the <abbr title="Graphical User Interface">GUI</abbr>.</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="nifty_gui_overlay.html" class="page">Nifty GUI Overlay</a> (recommended)</p>
</li>
<li>
<p><a href="nifty_gui_projection.html" class="page">Nifty GUI Projection</a> (optional)</p>
</li>
</ul>
</div>
</div>
</div>
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