mosababdo · August 26, 2018 17:02 · Sep 6, 2013 · Sep 6, 2013 · Sep 6, 2013
diff --git a/vista.css b/vista.css
@@ -15,11 +15,11 @@
 }
 
 #vista1 {
-    -fx-background-color: coral;
+    -fx-background-color: aliceblue;
 }
 
 #vista2 {
-    -fx-background-color: aliceblue;
+    -fx-background-color: coral;
 }
 
 .button {

diff --git a/vista2.fxml b/vista2.fxml
@@ -4,7 +4,7 @@
 
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.layout.StackPane?>
-<StackPane fx:id="vista1" xmlns:fx="http://javafx.com/fxml" fx:controller="Vista2Controller">
+<StackPane fx:id="vista2" xmlns:fx="http://javafx.com/fxml" fx:controller="Vista2Controller">
   <children>
     <Button mnemonicParsing="false" onAction="#previousPane" text="Previous Pane" />
   </children>

diff --git a/Vista1Controller.java b/Vista1Controller.java
@@ -7,9 +7,9 @@
 public class Vista1Controller {
 
     /**
-     * Event handler fires when the user requests a new vista.
+     * Event handler fired when the user requests a new vista.
      *
-     * @param event the event the triggered the handler.
+     * @param event the event that triggered the handler.
      */
     @FXML
     void nextPane(ActionEvent event) {

diff --git a/Vista2Controller.java b/Vista2Controller.java
@@ -7,9 +7,9 @@
 public class Vista2Controller {
 
     /**
-     * Event handler fires when the user requests a previous vista.
+     * Event handler fired when the user requests a previous vista.
      *
-     * @param event the event the triggered the handler.
+     * @param event the event that triggered the handler.
      */
     @FXML
     void previousPane(ActionEvent event) {

diff --git a/Main.java b/Main.java
@@ -0,0 +1,74 @@
+import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.layout.Pane;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
+/**
+ * Main application class.
+ */
+public class Main extends Application {
+
+    @Override
+    public void start(Stage stage) throws Exception{
+        stage.setTitle("Vista Viewer");
+
+        stage.setScene(
+            createScene(
+                loadMainPane()
+            )
+        );
+
+        stage.show();
+    }
+
+    /**
+     * Loads the main fxml layout.
+     * Sets up the vista switching VistaNavigator.
+     * Loads the first vista into the fxml layout.
+     *
+     * @return the loaded pane.
+     * @throws IOException if the pane could not be loaded.
+     */
+    private Pane loadMainPane() throws IOException {
+        FXMLLoader loader = new FXMLLoader();
+
+        Pane mainPane = (Pane) loader.load(
+            getClass().getResourceAsStream(
+                VistaNavigator.MAIN
+            )
+        );
+
+        MainController mainController = loader.getController();
+
+        VistaNavigator.setMainController(mainController);
+        VistaNavigator.loadVista(VistaNavigator.VISTA_1);
+
+        return mainPane;
+    }
+
+    /**
+     * Creates the main application scene.
+     *
+     * @param mainPane the main application layout.
+     *
+     * @return the created scene.
+     */
+    private Scene createScene(Pane mainPane) {
+        Scene scene = new Scene(
+            mainPane
+        );
+
+        scene.getStylesheets().setAll(
+            getClass().getResource("vista.css").toExternalForm()
+        );
+
+        return scene;
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}
diff --git a/MainController.java b/MainController.java
@@ -0,0 +1,23 @@
+import javafx.fxml.FXML;
+import javafx.scene.Node;
+import javafx.scene.layout.StackPane;
+
+/**
+ * Main controller class for the entire layout.
+ */
+public class MainController {
+
+    /** Holder of a switchable vista. */
+    @FXML
+    private StackPane vistaHolder;
+
+    /**
+     * Replaces the vista displayed in the vista holder with a new vista.
+     *
+     * @param node the vista node to be swapped in.
+     */
+    public void setVista(Node node) {
+        vistaHolder.getChildren().setAll(node);
+    }
+
+}
diff --git a/Vista1Controller.java b/Vista1Controller.java
@@ -0,0 +1,19 @@
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+
+/**
+ * Controller class for the first vista.
+ */
+public class Vista1Controller {
+
+    /**
+     * Event handler fires when the user requests a new vista.
+     *
+     * @param event the event the triggered the handler.
+     */
+    @FXML
+    void nextPane(ActionEvent event) {
+        VistaNavigator.loadVista(VistaNavigator.VISTA_2);
+    }
+
+}
diff --git a/Vista2Controller.java b/Vista2Controller.java
@@ -0,0 +1,19 @@
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+
+/**
+ * Controller class for the second vista.
+ */
+public class Vista2Controller {
+
+    /**
+     * Event handler fires when the user requests a previous vista.
+     *
+     * @param event the event the triggered the handler.
+     */
+    @FXML
+    void previousPane(ActionEvent event) {
+        VistaNavigator.loadVista(VistaNavigator.VISTA_1);
+    }
+
+}
diff --git a/VistaNavigator.java b/VistaNavigator.java
@@ -0,0 +1,63 @@
+import javafx.fxml.FXMLLoader;
+
+import java.io.IOException;
+
+/**
+ * Utility class for controlling navigation between vistas.
+ *
+ * All methods on the navigator are static to facilitate
+ * simple access from anywhere in the application.
+ */
+public class VistaNavigator {
+
+    /**
+     * Convenience constants for fxml layouts managed by the navigator.
+     */
+    public static final String MAIN    = "main.fxml";
+    public static final String VISTA_1 = "vista1.fxml";
+    public static final String VISTA_2 = "vista2.fxml";
+
+    /** The main application layout controller. */
+    private static MainController mainController;
+
+    /**
+     * Stores the main controller for later use in navigation tasks.
+     *
+     * @param mainController the main application layout controller.
+     */
+    public static void setMainController(MainController mainController) {
+        VistaNavigator.mainController = mainController;
+    }
+
+    /**
+     * Loads the vista specified by the fxml file into the
+     * vistaHolder pane of the main application layout.
+     *
+     * Previously loaded vista for the same fxml file are not cached.
+     * The fxml is loaded anew and a new vista node hierarchy generated
+     * every time this method is invoked.
+     *
+     * A more sophisticated load function could potentially add some
+     * enhancements or optimizations, for example:
+     *   cache FXMLLoaders
+     *   cache loaded vista nodes, so they can be recalled or reused
+     *   allow a user to specify vista node reuse or new creation
+     *   allow back and forward history like a browser
+     *
+     * @param fxml the fxml file to be loaded.
+     */
+    public static void loadVista(String fxml) {
+        try {
+            mainController.setVista(
+                FXMLLoader.load(
+                    VistaNavigator.class.getResource(
+                        fxml
+                    )
+                )
+            );
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}
diff --git a/main.fxml b/main.fxml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.*?>
+<?import javafx.scene.layout.*?>
+<?scenebuilder-stylesheet vista.css?>
+
+<VBox prefHeight="200.0" prefWidth="300.0" xmlns:fx="http://javafx.com/fxml" fx:controller="MainController">
+  <children>
+    <Label fx:id="headerLabel" maxWidth="1.7976931348623157E308" text="Header" VBox.vgrow="NEVER" />
+    <StackPane fx:id="vistaHolder" VBox.vgrow="ALWAYS" />
+  </children>
+</VBox>
diff --git a/vista.css b/vista.css
@@ -0,0 +1,28 @@
+/**
+ * vista.css
+ *   Place in the same source directory as Main.java
+ *   Ensure that your build system copies this file to your build output directory.
+ */
+
+#headerLabel {
+    -fx-background-color: steelblue;
+    -fx-text-fill: white;
+    -fx-padding: 5px;
+}
+
+#vistaHolder {
+    -fx-background-color: lightgrey;
+}
+
+#vista1 {
+    -fx-background-color: coral;
+}
+
+#vista2 {
+    -fx-background-color: aliceblue;
+}
+
+.button {
+    -fx-base: lightblue;
+    -fx-font-size: 20px;
+}
diff --git a/vista1.fxml b/vista1.fxml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.*?>
+<?import javafx.scene.layout.*?>
+<?scenebuilder-stylesheet vista.css?>
+
+<StackPane fx:id="vista1" xmlns:fx="http://javafx.com/fxml" fx:controller="Vista1Controller">
+  <children>
+    <Button mnemonicParsing="false" onAction="#nextPane" text="Next Pane" />
+  </children>
+</StackPane>
diff --git a/vista2.fxml b/vista2.fxml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?scenebuilder-stylesheet vista.css?>
+
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.layout.StackPane?>
+<StackPane fx:id="vista1" xmlns:fx="http://javafx.com/fxml" fx:controller="Vista2Controller">
+  <children>
+    <Button mnemonicParsing="false" onAction="#previousPane" text="Previous Pane" />
+  </children>
+</StackPane>
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