4 将WebView组件添加到应用程序场景中

示例4-1 使用WebView和WebEngine类创建浏览器

import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
 
 
public class WebViewSample extends Application {
    private Scene scene;
    @Override public void start(Stage stage) {
        // 创建场景
        stage.setTitle("Web View");
        scene = new Scene(new Browser(),900,600, Color.web("#666970"));
        stage.setScene(scene);
        scene.getStylesheets().add("webviewsample/BrowserToolbar.css");        
        stage.show();
    }
 
    public static void main(String[] args){
        launch(args);
    }
}
class Browser extends Region {
 
    final WebView browser = new WebView();
    final WebEngine webEngine = browser.getEngine();
     
    public Browser() {
        // 应用样式
        getStyleClass().add("browser");
        // 加载网页
        webEngine.load("http://www.oracle.com/products/index.html");
        // 将WebView添加到场景中
        getChildren().add(browser);
 
    }
    private Node createSpacer() {
        Region spacer = new Region();
        HBox.setHgrow(spacer, Priority.ALWAYS);
        return spacer;
    }
 
    @Override protected void layoutChildren() {
        double w = getWidth();
        double h = getHeight();
        layoutInArea(browser,0,0,w,h,0, HPos.CENTER, VPos.CENTER);
    }
 
    @Override protected double computePrefWidth(double height) {
        return 900;
    }
 
    @Override protected double computePrefHeight(double width) {
        return 600;
    }
}

示例4-2 创建工具栏

for (int i = 0; i < captions.length; i++) {
final Hyperlink hpl = hpls[i] = new Hyperlink(captions[i]);
Image image = images[i] =
new Image(getClass().getResourceAsStream(imageFiles[i]));
hpl.setGraphic(new ImageView (image));
final String url = urls[i];
hpl.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
webEngine.load(url);
}
});
}
toolBar = new HBox();
toolBar.getStyleClass().add("browser-toolbar");
toolBar.getChildren().addAll(hpls);