In JavaFX, the FXMLLoader class creates the controller itself based on info in the UI’s fxml file. For GUI apps, “start the application” means to display the UI. The GameApp class is a “Main” class that creates initial objects and starts the application. Main class - initialize and start the app the flow of the application, such as starting a new game or displaying a new form, enabling/disabling controls based on context.The only logic that belongs in the controller is: Your application logic should be in the Model, not in the Controller. give hints and messages - the getMessage method.evaluate the user’s guess and return true (correct) or false (incorrect).randomly choose a secret number (1 to an upperBound).In the guessing game, the model is responsible for: The Model class contains the logic for the application. See the section below “Assigning Event Handlers Programmatically” for how to. You can also assign event handlers in initialize() instead of specifying them in the UI (FXML file). You can hard-code the text strings into the fxml form, instead of using Java code, but its less flexible. initialize() also gets an initial message (hint) from the game and displays it in a label field. To make the UI easy to modify, I use the initialize() method to set the text shown on the UI buttons and labels. The controller class (GameController) has a method named initialize() annotated with JavaFX calls this method after it creates the UI components. Then it updates the UI to show the result. button1Press reads the user’s input and calls the game to evaluate the user’s input. When the user clicks on button1, JavaFX calls our button1Press() method. Here is part of the code for the controller: In the example code, it also initializes the text shown in the UI. The controller handles events generated from the View (UI) and updates the UI. You can also open the FXML file in a plain text editor and see what it looks like. To edit this file in Eclipse, right click on the file and choose “Open with SceneBuilder”. Each component has a few properties set, such as its “fx:id” and text alignment. The components are Labels, Buttons, and one TextField arranged using a GridLayout. You can view or modify this UI using SceneBuilder. The figure shows the name of each component, which is its “fx:id” used by JavaFX. The simple user interface contains these components: GameApp.java - “main” class that configures the application and launches the UI.Įach component is explained below. Has methods for communicating with the controller.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |