Refer to the previous article "Execute JavaScript in WebView from Java code":
- Modify hello.html to add a Javascript pageOnLoad() function to call alert(), and also modify <body> to run pageOnLoad() when page loaded.
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset=utf-8>
<title>Hello Java-Buddy! (from WebPage)</title>
<script>
function updateHello(user){
document.getElementById("helloprompt").innerHTML="Hello: " + user;
}
function clearHello(user){
document.getElementById("helloprompt").innerHTML="Hello <a href='http://java-buddy.blogspot.com/'>Java-Buddy</a>";
}
function pageOnLoad(){
alert();
}
</script>
</head>
<body onload="pageOnLoad()">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxGfYYk9MPmsy4Fb5yBONPauX59KlswhZvZL_XoWgvPMp2SwHsLorHIo4aWZJsUc9oynuzwstK5MfzjmjmNevnJFjJt1HIhcl-iRH3dnK2twWSeX6MdjSbAz4nyMzaNQE1p-Pajqfg3KKN/s150/duke_44x80.png"/>
<p id="helloprompt">Hello <a href="http://java-buddy.blogspot.com/">Java-Buddy</a></p>
</body>
</html>
- Modify JavaFX code to call setOnAlert() to implement OnAlert EventHandler.
package javafx_webview;
import java.net.URL;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Region;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebEvent;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFX_Browser extends Application {
private Scene scene;
MyBrowser myBrowser;
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("java-buddy.blogspot.com");
myBrowser = new MyBrowser();
scene = new Scene(myBrowser, 640, 480);
primaryStage.setScene(scene);
primaryStage.show();
}
class MyBrowser extends Region{
HBox toolbar;
WebView webView = new WebView();
WebEngine webEngine = webView.getEngine();
public MyBrowser(){
final Label labelWebTitle = new Label();
final URL urlHello = getClass().getResource("hello.html");
webEngine.load(urlHello.toExternalForm());
webEngine.setOnAlert(new EventHandler<WebEvent<String>>(){
@Override
public void handle(WebEvent<String> arg0) {
labelWebTitle.setText(webEngine.getTitle());
}
});
final TextField textField = new TextField ();
textField.setPromptText("Hello! Who are?");
Button buttonEnter = new Button("Enter");
buttonEnter.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent arg0) {
webEngine.executeScript( " updateHello(' " + textField.getText() + " ') " );
}
});
Button buttonClear = new Button("Clear");
buttonClear.setOnAction(new EventHandler<ActionEvent>(){
@Override
public void handle(ActionEvent arg0) {
webEngine.executeScript( "clearHello()" );
}
});
toolbar = new HBox();
toolbar.setPadding(new Insets(10, 10, 10, 10));
toolbar.setSpacing(10);
toolbar.setStyle("-fx-background-color: #336699");
toolbar.getChildren().addAll(labelWebTitle, textField, buttonEnter, buttonClear);
getChildren().add(toolbar);
getChildren().add(webView);
}
@Override
protected void layoutChildren(){
double w = getWidth();
double h = getHeight();
double toolbarHeight = toolbar.prefHeight(w);
layoutInArea(webView, 0, 0, w, h-toolbarHeight, 0, HPos.CENTER, VPos.CENTER);
layoutInArea(toolbar, 0, h-toolbarHeight, w, toolbarHeight, 0, HPos.CENTER, VPos.CENTER);
}
}
}
Related:
- Communication between JavaFX and JavaScript inside WebView, using JSObject
Nice topic, keep it up.
ReplyDeleteThank you for the article.
ReplyDeleteBut setOnAlert(EventHandler> handler purpose is to set the JavaScript alert handler and you use it for setting the Web page title.
I am looking for a way to implement setOnAlert to set the JavaScript alert handler. Any help would be welcome.
JCD