ADDITIONAL SYSTEM INFORMATION :
Windows 10 1903 + OpenJDK 15.0.1 + OpenJFX 15.0.1
Windows 10 1903 + OpenJDK 15.0.1 + OpenJFX 16-ea+4
Linux Ubuntu 20.04 + OpenJDK 15.0.1 + OpenJFX 15.0.1
A DESCRIPTION OF THE PROBLEM :
My application uses HTML/CSS to build a menu that is hidden at first and "slides in" from the left side when the menu button is clicked. I've included a short sample HTML file (with all HTML, CSS and JavaScript together) that demonstrates the problem. In a browser (FireFox), this HTML works fine. But when the HTML is rendered in a WebView container, the menu doesn't slide in. I've reproduced the problem with OpenJFX 15.0.1 and OpenJFX 16-ea+4 on Windows 10 using the OpenJDK 15.0.1 version of Java. I've also reproduced the problem on Linux Ubuntu 20.04 using OpenJFX 15.0.1 and OpenJDK 15.0.1. When I revert to using either OpenJFX 11.0.2 LTS or OpenJFX 12.0.1, the problem does not occur.
REGRESSION : Last worked in version 12
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Load the main.html file into a browser (e.g. Firefox)
2. Click the "Click here to open/close Menu" link
3. The menu appears by sliding-in from the left side of the application window
4. Start the App class using OpenJDK 15.0.1 and OpenJFX 15.0.1 or OpenJFX 16-ea+4, making sure the main.html file is accessible to the App
5. Click the "Click here to open/close Menu" link in the application window
6. The menu never appears (does not slide-in from the left side)
EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A blue-colored menu with the title "Menu" and a list of three items should slide-in from the left side of the app windows. If you start the same App.class with OpenJDK 15.0.1 and OpenJFX 11.0.2 LTS or OpenJFX 12.0.1, the menu slides-in as expected.
ACTUAL -
The menu does not appear at all (does not slide-in from the left). In some cases, the menu may appear some time later (5-15 seconds) after some other event occurs (like mousing-over the "Click here ..." link again); but when it appears and under what circumstances is not consistent. Most times, the menu simply does not appear at all.
---------- BEGIN SOURCE ----------
main.html
-----------------
<!DOCTYPE html>
<html lang="en">
<style>
html, body {
overflow: hidden;
}
body {
font-size: 1.1em;
margin: 10px;
}
.menu-button {
cursor: pointer;
}
.left-slidein {
transform: translate3d(-250px, 0, 0);
position: absolute;
width: 150px;
background: #aa99ff;
color: white;
left: 0;
top: 50px;
height: 100%;
transition: all .5s;
}
.left-slidein.active {
transform: translate3d(0, 0, 0);
}
.left-slidein h2 {
padding: 10px;
text-shadow: 1px 1px 1px #000;
border-bottom: 2px solid white;
margin:5px 0px 0px 0px;
}
.main-menu a {
display: block;
text-decoration: none;
color: #fff;
font-size: 1.1em;
padding: 15px;
border-bottom: 1px solid white;
}
.main-menu a:hover {
background: #808080;
}
</style>
<script>
function slideinLeftMenu() {
document.getElementById('left-slidein').classList.toggle('active');
slideoutRightMenu();
}
function slideoutLeftMenu() {
document.getElementById('left-slidein').classList.remove('active');
}
</script>
<head>
<meta charset="utf-8"/>
<title>OpenJFX Bug Demo</title>
</head>
<body>
<!-- div><a href="#" onclick="slideinLeftMenu()">Open/Close Menu</a></div -->
<div id="menu-button" class="menu-button" onclick="slideinLeftMenu()">Click here to open/close Menu</div>
<div id="left-slidein" class="left-slidein">
<h2>Menu</h2>
<div class="main-menu">
<nav>
<a id="item1" href="#" onclick="slideoutLeftMenu();">Item 1</a>
<a id="item2" href="#" onclick="slideoutLeftMenu();">Item 2</a>
<a id="item3" href="#" onclick="slideoutLeftMenu();">Item 3</a>
</nav>
</div>
</div>
</body>
</html>
-----------------
App.java
-----------------
package bug.openjfx;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import org.w3c.dom.Document;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Worker.State;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
public class App extends Application {
private Stage primaryStage;
private WebView webView;
private WebEngine webEngine;
protected Document document;
public static void main(String[] args) {
launch(args);
System.exit(0);
}
@Override
public void start(Stage stage) throws Exception {
this.primaryStage = stage;
Platform.setImplicitExit(true);
primaryStage.setTitle("OpenJFX Bug Demo");
webView = new WebView();
webEngine = webView.getEngine();
StackPane appLayout = new StackPane();
appLayout.getChildren().add(webView);
Scene scene = new Scene(appLayout);
primaryStage.setScene(scene);
primaryStage.setWidth(400);
primaryStage.setHeight(400);
webEngine.getLoadWorker().stateProperty().addListener( new ChangeListener<State>() {
public void changed(@SuppressWarnings("rawtypes") ObservableValue ov, State oldState, State newState) {
if (newState == State.SUCCEEDED) {
document = webEngine.getDocument();
}
}
});
String document = readDocumentAsString("main.html");
webEngine.loadContent(document);
primaryStage.show();
}
private String readDocumentAsString(String documentName) {
URL url = this.getClass().getResource(documentName);
String document = readFileContentsAsString(url.toString().substring(6));
return document;
}
private String readFileContentsAsString(String filename) {
InputStream inStream = getFileResourceInputStream(filename);
StringBuffer fileString = new StringBuffer();
try {
BufferedReader br = new BufferedReader(new InputStreamReader(inStream));
String lineRead = br.readLine();
while (null != lineRead) {
fileString.append(lineRead).append("\n");
lineRead = br.readLine();
}
br.close();
} catch (Exception e) {
fileString = new StringBuffer();
}
return fileString.toString();
}
private InputStream getFileResourceInputStream(String filename) {
InputStream inStream = null;
try {
inStream = new FileInputStream(filename);
} catch (FileNotFoundException ignore) {
}
return inStream;
}
}
-----------------
---------- END SOURCE ----------
CUSTOMER SUBMITTED WORKAROUND :
The only work-around I have found is to revert to an older release of OpenJFX. I was previously using OpenJFX 12.0.1 on Windows 10 and the problem does not occur there. I also tried OpenJFX 11.0.2 LTS on both Windows 10 and Ubuntu 20.04 and the problem does not occur with this version on either OS.
FREQUENCY : always