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Having looked at the bean configuration files, we will now take a look at the support for the Spring Web Flow web application framework. The Spring IDE provides an option under the Spring properties dialog box. Figure A-15 shows this dialog. The left menu is abbreviated because it has been accessed via the Spring Elements context menu instead of the top-level project s context menu; otherwise, the dialogs of Figure A-8 and A-15 are identical in their behavior. Figure A-15 shows the Web Flow Support leaf selected, and a Web Flow configuration file has been added via the Add button. So far this is similar to the addition of bean definition files on the Beans Support node of the same dialog.

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GraphicsDeviceManager graphics; // 3D objects cls3DAxis my3DAxis; protected override void Initialize() { my3DAxis = new cls3DAxis(graphics.GraphicsDevice); base.Initialize(); } protected override void LoadContent() { // Create the 3D axis my3DAxis.LoadGraphicsContent(); } protected override void UnloadContent() { // Free the resources allocated for 3D drawing my3DAxis.UnloadContent(); } protected override void Draw(GameTime gameTime) { graphics.GraphicsDevice.Clear(Color.CornflowerBlue); // Draw the 3D axis my3DAxis.Draw(); base.Draw(gameTime); } The result of running this code, shown in Figure 8-15, might not look as you expected. You see only the x and y axes, and this certainly doesn t seem too much like 3D. This is because the camera position is aligned with the z axis, so this axis is hidden behind the y axis, and the letter Z is not drawn, because it s behind the camera. You could simply adjust the camera position in the cls3Daxis class, but let s do a little better, while exploring a new concept: the world matrix. The world matrix, as explained when we talked about effects, is a property of the Effect class that contains transformations that are applied to all scene objects when rendering.

The configuration file selected in Figure A-15 is the flow definition file used to specify the interactions necessary to create a new user. We defined this file manually in 6.

Figure 8-15. The 3D axis Let s use the world matrix to make this 3D axis drawing spin, so you can see the result of rotating a 3D scene. You can do this in three easy steps: 1. Create a new property in the cls3Daxis class to store the current world matrix, defaulting to an identity matrix (a matrix that doesn t perform any transformation): public Matrix worldMatrix = Matrix.Identity; 2. Include a new line in the Draw method of this class to update the effect s World property to this matrix, so the effect receives the updated matrix and is able to use it to transform the axis drawing: effect.World = worldMatrix;

The web flow has dependencies on the configured Spring beans. For example, our web flow defined in the createUser-flow.xml file invokes actions on a bean specified in the timesheet-webflow.xml bean definition file. Clicking the Edit button in Figure A-15 brings up the dialog box shown in Figure A-16, listing the bean definition files known to the project. Selecting appropriate bean definitions makes their contents available for access from the web flow definition.

3. Include a new line in the Update method of the Game1 class to update the cls3Daxis worldMatrix property, incrementing the world rotation angle in every update: my3DAxis.worldMatrix *= Matrix.CreateRotationY(0.01f) * Matrix.CreateRotationX(0.01f); If you run your program now, you will see the nice result of spinning the 3D axis, as shown in Figure 8-16.

With the web flow and its dependencies correctly specified, we get a similar range of benefits to those for bean definitions described earlier in the chapter creating, validating, viewing, and editing your web flows. In Figure A-17, I have commented out a vital element of the web flow definition file. The error is flagged in the margin, and the first incorrect element has been underlined in red (a view-state element should not appear until a start-state element has been defined). Autocompletion is also provided for most of the elements and attributes of the file and where bean-related information must be provided, the autocompletion can supply the valid options from the bean definition files that we associated with the web flow.