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Version 4.1 by Pascal Robert on 2011/12/27 06:47
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1 For your first project, we will do the classic "Hello world" example. This tutorial is more for learning how the development tools works.
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3 First, we will create a new Wonder Application. In Eclipse, open the **File** menu, select **New** and select **Wonder Application**.
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5 [[image:NewWOProject.png||border="1"]]
6 
7
8 {{info}}
9 If the Wonder project types don't appear in the File->New menu, you are probably in a Java perspective instead of WOLips.
10 {{/info}}
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12 The project wizard will ask for the project name. Enter **HelloWorld**. Click **Finish**.
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14 [[image:SetProjectName.png||border="1"]]
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16 {{info}}
17 Don't put spaces in the project name, Eclipse have a hard time with projects that have spaces in the file system path.
18 {{/info}}
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20 The project have been created, you will see it in the **WO Explorer** tab. Expand it (click on the triangle next to the project name) and you will see the following folders:
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22 * **Sources**: this folder holds all of your Java source code. When you create a new project, that folder have 4 files: Application.java, Session.java, DirectAction.java and Main.java.
23 * **JRE System Library**: don't touch this.
24 * **Components**: this folder holds all of your Project Wonder components.
25 * **Libraries**: if you have JARs, for example JDBC drivers, that you need for your project, put them in there.
26 * **Resources**: that folder is for Project Wonder-specific files. A **Properties** file is added by default.
27 * **WebServerResources**: that folder is for "static" content that you use in your components, be it images, CSS or JavaScript files.
28 * **woproject**: this folder holds 6 files that the Ant builder use to include or exclude files and folders in the build product. 99% of the time, you don't need to customize those files.
29 * **build.xml**: This is the XML file to build the project with Ant. Note that this is to build a "product", when you run the project in Eclipse, it use the incremental builder instead of Ant.
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31 So let's run the project. Expand the **Sources** folder, expand the **your.app** package, right-click on **Application.java** and select **Run As** > **WOApplication**. This action will start the project and it will create a run configuration for Eclipse.
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33 After a couple of seconds, the project will be started and a page will open in your favorite browser. You just run your first Project Wonder application, congratulations
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35 Now, let's make the "Hello World" to be dynamic. If the HelloWorld application is still running, terminate it by clicking on the square red button in the **Console** tab.
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37 In the project, open the **Sources** folder, open the **your.app.components** package and open **Main.java**. **Main.java** is the Java part of a Project Wonder component. If you check the content of the **Related** tab, you will see that **Main.java** is related to other files like **Main.wo** and **Main.api**, it's a good way to find out if a Java class is part of a component.
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39 In the **Main.java** editor tab, you will need to put one variable + one setter + one getter. Complete code:
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41 {{code language="java" theme="Eclipse"}}
42 private String myTextForDisplay = "Hello World from the Java world";
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44 public String myTextForDisplay() {
45 return myTextForDisplay;
46 }
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48 public void setMyTextForDisplay(String myTextForDisplay) {
49 this.myTextForDisplay = myTextForDisplay;
50 }
51 {{/code}}
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53 Save the file.
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55 So now we have a variable to display the content of a string. The next step is to open the HTML part of the component to actually display the string. In the **Related** view, double-click on the **Main.wo** file. This action will open the component in the Component Editor.
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57 Remove the Hello World text from the HTML and replace it with:
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59 {{code}}
60 <wo:str value = "$myTextForDisplay" />
61 {{/code}}
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63 And save your modifications. You are now ready to run the application again. The first time you ran the application, it created a run configuration inside Eclipse, so to run the application again, click on the green circle with a white arrow in the toolbar, and select **HelloWorld**.
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65 The application is now displaying the string for the Java variable You can terminate the application.
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67 Final step: making the string truly variable by having a small text field to update the string. To do so, go back into the Main component editor view and just after the&nbsp;