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| <div class='grid-container main-content tutorial'> |
| <h1 class="sect0">NetBeans Visual Library Tutorial for Java Applications</h1> |
| <div class="sectionbody"> |
| <div class="admonitionblock note"> |
| <table> |
| <tbody><tr> |
| <td class="icon"><i class="fa icon-note" title="Note"></i></td> |
| <td class="content">This tutorial needs a review. |
| You can <a href="https://github.com/apache/netbeans-antora-tutorials/edit/main/modules/ROOT/pages/tutorials/nbm-visual_library3.adoc" title="Edit this tutorial in github">edit it in GitHub </a> |
| following these <a href="../../../../tutorial/main/kb/docs/contributing">contribution guidelines.</a></td> |
| </tr></tbody> |
| </table> |
| </div> |
| </div> |
| <div id="toc" class="toc"> |
| <div id="toctitle"></div> |
| <ul class="sectlevel1"> |
| <li><a href="#_setting_up_the_application">Setting Up the Application</a></li> |
| <li><a href="#_adding_the_libraries">Adding the Libraries</a></li> |
| <li><a href="#_creating_the_container">Creating the Container</a></li> |
| <li><a href="#_creating_the_widgets">Creating the Widgets</a></li> |
| <li><a href="#_enabling_the_actions">Enabling the Actions</a></li> |
| </ul> |
| </div> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this tutorial, you will learn how to use the main features provided by the <a href="https://bits.netbeans.org/dev/javadoc/org-netbeans-api-visual/overview-summary.html">NetBeans Visual Library API</a>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Also, you will use 3 icons in the tutorial. You can right-click them here and save them locally, then copy them to the application’s location, after you create the application later in this tutorial. Here are the 3 icons:</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_red.gif" alt="vislib red"> |
| </div> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_blue.gif" alt="vislib blue"> |
| </div> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_green.gif" alt="vislib green"> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_setting_up_the_application"><a class="anchor" href="#_setting_up_the_application"></a>Setting Up the Application</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this section, we use a wizard to create a Java application.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="1"> |
| <li> |
| <p>Choose File > New Project (Ctrl+Shift+N). Under Categories, select Java. Under Projects, select Java Application. Click Next.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="paragraph"> |
| <p>1. |
| In the Name and Location panel, type <code>VisLibDemo</code> in the Project Name field:</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_vislib-java-1.png" alt="vislib vislib java 1"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Click Finish.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The IDE creates the <code>VisLibDemo</code> project. Add the three images above to the main package. You should now see this:</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_vislib-java-2.png" alt="vislib vislib java 2"> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_adding_the_libraries"><a class="anchor" href="#_adding_the_libraries"></a>Adding the Libraries</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this section, we add the two libraries you need to work with the Visual Library.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="1"> |
| <li> |
| <p>Right-click the Libraries node and choose "Add JAR/Folder".</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="2"> |
| <li> |
| <p>Browse to the installation directory of NetBeans IDE.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="3"> |
| <li> |
| <p>In <code>platform9/lib</code> , choose <code>org-openide-util.jar</code> .</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="4"> |
| <li> |
| <p>In <code>platform9/modules</code> , choose <code>org-netbeans-api-visual.jar</code> .</p> |
| </li> |
| </ol> |
| </div> |
| <div class="paragraph"> |
| <p>You now have the only two JARs you will need. You should now see this:</p> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_vislib-java-3.png" alt="vislib vislib java 3"> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_creating_the_container"><a class="anchor" href="#_creating_the_container"></a>Creating the Container</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this section, we create the container that will hold the <code>Scene</code> from the Visual Library.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="1"> |
| <li> |
| <p>Define <code>Main.java</code> as follows:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public class Main extends JPanel { |
| |
| *//Create the JFrame:* |
| public static void main(String[] args) { |
| JFrame frame = new JFrame("Graph test"); |
| frame.setMinimumSize(new Dimension(500, 400)); |
| frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); |
| frame.setContentPane(new Main()); |
| frame.pack(); |
| frame.setVisible(true); |
| } |
| |
| public Main() { |
| initComponents(); |
| } |
| |
| private void initComponents() { |
| *//Set the layout:* |
| setLayout(new BorderLayout()); |
| *//Create a JScrollPane:* |
| JScrollPane scrollPane = new JScrollPane(); |
| *//Add the JScrollPane to the JPanel:* |
| add(scrollPane, BorderLayout.CENTER); |
| } |
| |
| }</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="2"> |
| <li> |
| <p>Run the application and you should see a simple JFrame:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_vislib-java-4.png" alt="vislib vislib java 4"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Now that you have a <code>JScrollPane</code> , you’re ready to create a scene!</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_creating_the_widgets"><a class="anchor" href="#_creating_the_widgets"></a>Creating the Widgets</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this section, we create a separate class containing our scene. We then hook it into our <code>JPanel</code> .</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="1"> |
| <li> |
| <p>Create a new class called <code>GraphSceneImpl.java</code> .</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="2"> |
| <li> |
| <p>Let it extend GraphScene<String, String>.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="3"> |
| <li> |
| <p>Use the lightbulb at the side of the IDE to add import statements and abstract methods. You should now see this:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">package vislibdemo; |
| |
| import org.netbeans.api.visual.graph.GraphScene; |
| import org.netbeans.api.visual.widget.Widget; |
| |
| public class GraphSceneImpl extends GraphScene<String, String> { |
| |
| @Override |
| protected Widget attachNodeWidget(String arg0) { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| |
| @Override |
| protected Widget attachEdgeWidget(String arg0) { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| |
| @Override |
| protected void attachEdgeSourceAnchor(String arg0, String arg1, String arg2) { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| |
| @Override |
| protected void attachEdgeTargetAnchor(String arg0, String arg1, String arg2) { |
| throw new UnsupportedOperationException("Not supported yet."); |
| } |
| |
| }</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="4"> |
| <li> |
| <p>We’ll be using three <code>LayerWidgets</code> , which are like <code>JGlassPanes</code> in Swing. Declare them at the top of the class:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">private LayerWidget mainLayer; |
| private LayerWidget connectionLayer; |
| private LayerWidget interactionLayer;</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="5"> |
| <li> |
| <p>Create a constructor, initialize your <code>LayerWidgets</code> and add them to the <code>Scene</code> :</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">public GraphSceneImpl() { |
| mainLayer = new LayerWidget(this); |
| connectionLayer = new LayerWidget(this); |
| interactionLayer = new LayerWidget(this); |
| addChild(mainLayer); |
| addChild(connectionLayer); |
| addChild(interactionLayer); |
| }</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="6"> |
| <li> |
| <p>Next, define what will happen when a new Widget is created:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Override |
| protected Widget attachNodeWidget(String arg) { |
| IconNodeWidget widget = new IconNodeWidget(this); |
| if (arg.startsWith("1")) { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/red.gif")); |
| } else if (arg.startsWith("2")) { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/green.gif")); |
| } else { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/blue.gif")); |
| } |
| widget.setLabel(arg); |
| mainLayer.addChild(widget); |
| return widget; |
| }</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The above is triggered whenever <code>addNode</code> is called on the scene.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="7"> |
| <li> |
| <p>At the end of the constructor, trigger the method above 4 times:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">Widget w1 = addNode("1. Hammer"); |
| w1.setPreferredLocation(new Point(10, 100)); |
| Widget w2 = addNode("2. Saw"); |
| w2.setPreferredLocation(new Point(100, 250)); |
| Widget w3 = addNode("Nail"); |
| w3.setPreferredLocation(new Point(250, 250)); |
| Widget w4 = addNode("Bolt"); |
| w4.setPreferredLocation(new Point(250, 350));</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Above, you have created four widgets, you have passed in a string, and you have set the widget’s position. Now, the <code>attachNodeWidget</code> method is triggered, which you defined in the previous step. The <code>arg</code> parameter in the <code>attachNodeWidget</code> is the string you passed to <code>addNode</code> . Therefore, the string will set the label of the widget. Then the widget is added to the <code>mainLayer</code> .</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="8"> |
| <li> |
| <p>Back in the <code>Main.java</code> class, add the lines in bold to the <code>initComponents</code> method:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">private void initComponents() { |
| //Set the layout: |
| setLayout(new BorderLayout()); |
| //Create a JScrollPane: |
| JScrollPane scrollPane = new JScrollPane(); |
| //Add the JScrollPane to the JPanel: |
| add(scrollPane, BorderLayout.CENTER); |
| *//Create the GraphSceneImpl: |
| GraphScene scene = new GraphSceneImpl(); |
| //Add it to the JScrollPane: |
| scrollPane.setViewportView(scene.createView()); |
| //Add the SatellitView to the scene: |
| add(scene.createSatelliteView(), BorderLayout.WEST);* |
| }</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="9"> |
| <li> |
| <p>Run the application and you should see this:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="../../_images/tutorials/vislib_vislib-java-5.png" alt="vislib vislib java 5"> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Now that you have a scene with some widgets, we can begin integrating some actions!</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_enabling_the_actions"><a class="anchor" href="#_enabling_the_actions"></a>Enabling the Actions</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In this section, we enable actions on the widgets we created previously.</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="1"> |
| <li> |
| <p>Change the <code>attachNodeWidget</code> by adding the lines in bold below:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">@Override |
| protected Widget attachNodeWidget(String arg) { |
| IconNodeWidget widget = new IconNodeWidget(this); |
| if (arg.startsWith("1")) { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/red.gif")); |
| } else if (arg.startsWith("2")) { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/green.gif")); |
| } else { |
| widget.setImage(ImageUtilities.loadImage("vislibdemo/blue.gif")); |
| } |
| *widget.getActions().addAction( |
| ActionFactory.createAlignWithMoveAction( |
| mainLayer, interactionLayer, |
| ActionFactory.createDefaultAlignWithMoveDecorator()));* |
| widget.setLabel(arg); |
| mainLayer.addChild(widget); |
| return widget; |
| }</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="2"> |
| <li> |
| <p>Run the application. Drag a widget around and notice that alignment markers appear that help the user position a widget in relation to other widgets.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="3"> |
| <li> |
| <p>Change the <code>GraphSceneImpl</code> class by adding the line below to the end of the constructor:</p> |
| </li> |
| </ol> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">getActions().addAction(ActionFactory.createZoomAction());</code></pre> |
| </div> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic" start="4"> |
| <li> |
| <p>Run the application. Scroll the middle mousebutton, or do whatever your operating system requires for "zooming", and notice that the whole scene increases/decreases in size.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="paragraph"> |
| <p>Now that you have a basic idea of the features that the Visual Library API provides, see the section called "NetBeans APIs for Visualizing Data" on the <a href="../../kb/docs/platform/" class="xref page">NetBeans Platform Learning Trail</a>.</p> |
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