I'm testing JavaFx and I tried a simple HtmlEditor demo. Everything seems ok, the editors appears, I can type text, but if I click on a pull down menu (ex. to change the font size) the application freeze, I get a black rectangle where the menu is suppose to appear.
I'm on Windows 10 64Bits, JDK 8u65, with IntelliJ
I Tested on another windows computer, with a fresh Java install same
problem
I tested creating a Java application, and a JavaFx application
same problem
I Tested on a mac (recent, bought 2 months ago), the demo works
perfectly
Here is the example code I found on the web :
package Test;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.web.HTMLEditor;
import javafx.stage.Stage;
public class Test extends Application {
#Override
public void start(Stage stage) {
stage.setTitle("HTMLEditor Sample");
stage.setWidth(400);
stage.setHeight(300);
final HTMLEditor htmlEditor = new HTMLEditor();
htmlEditor.setPrefHeight(245);
Scene scene = new Scene(htmlEditor);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Related
I am trying to load external images using JavaFX, but since using the new raspberry 4, I am unable to load external images, I can however load images internal to the Jar file.
as an example I have attached the code below. this works on my mac and raspberry pi3 but does not work for the raspberry pi 4 running Debian Buster, the only difference between the raspberry pi 4 and the there computers is that the RPI4 is running the latest JavaFX openjdk 14.0.1 and the other computers are running version 1.8.0_20.
on all instances i get a print of true for System.out.println(file.exists());
the RPI4 can load images inside the Jar, any help please
Code:
package application;
import java.io.File;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.StackPane;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
Scene scene = new Scene(setupScene(), 300, 300);
primaryStage.setScene(scene);
primaryStage.setTitle("Image Screen");
primaryStage.show();
}
StackPane setupScene() {
StackPane root = new StackPane();
ImageView imageView = new ImageView();
imageView.setPreserveRatio(true);
imageView.setSmooth(true);
File file = new File("/home/pi/dscf4452.jpg");
System.out.println(file.exists());
System.out.println(file);
Image image = new Image(file.toURI().toString());
// Image image = new Image(getClass().getClassLoader().getResource("test.jpg").toString());
imageView.setImage(image);
root.setPrefSize(250, 250);
imageView.setFitHeight(root.getPrefHeight());
imageView.setFitWidth(root.getPrefWidth());
root.getChildren().add(imageView);
return root;
}
}
I have not worked much with gui before, but I am trying to learn it by building a javafx application using SceneBuilder. Now I have trouble getting ImageView to resize when I resize the window.
I am using a gridPane, and i have placed a ImageView on a anchorPane inside one of the routes in the gridPane. The gridPane is changing size when I change the size of my window when i run the application, but the ImageView does not change size. I want the Imageview to change size correspondingly when i change the size of the window when i run the application.
have tried to read similar issues here on the forum, but have not found a solution that I can use, Does anyone have a good way to do this?
Really appreciate all answers.
You can use binding for simplicity, here the full example code
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage){
GridPane gridPane = new GridPane();
AnchorPane anchorPane = new AnchorPane();
// Set image with url
Image image = new Image("https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR-524e2cCaY9TUn8vglN3nqqOlT0jIJIIty-Z81S49q9Np6Yws");
ImageView imageView = new ImageView(image);
// Bind the imageView width property to gridPane width property
// So, if width of gridPane change, the width of imageView automatically will be change
imageView.fitWidthProperty().bind(gridPane.widthProperty());
// Make the ratio same with original image
imageView.setPreserveRatio(true);
anchorPane.getChildren().add(imageView);
gridPane.getChildren().add(anchorPane);
Scene scene = new Scene(gridPane, 600, 400);
primaryStage.setTitle("Hello World");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
I want to wrap text in a new line in some controls.
For example when there is not enough space to display the whole text of a checkbox, there should be a new line for that. I don't want these dots ("...").
The same behaviour I would like in a TableCell (not editable) and in a TextField or TextArea.
I tested .setWrapText(true) but this didn't help...
Can anybody help me please?
Best regards
It looks like it depends on the layout you are using.
For example this code wraps the CheckBox text no problem:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.CheckBox;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class CheckBoxTest extends Application {
#Override
public void start(Stage stage) throws Exception {
BorderPane pane = new BorderPane();
Scene scene = new Scene(pane, 300, 200);
stage.setScene(scene);
CheckBox checkBox = new CheckBox("This is a really really really really really really really really long string");
checkBox.setWrapText(true);
pane.setCenter(checkBox);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}
But if I were to change the BorderPane to a FlowPane, the wrapping would not work.
In my Swing application I needed support for rendering html. So I embedded a JavaFX WebView in my Swing application. Now on some html pages I use the new html5 -Tag to play a video. This works perfectly on Windows and Linux. But on MacOS I only hear the sound and see a black video frame and the time track in the bottom.
Here is an SSCCE I got from github. I just changed the url to one that contains a html5 video-tag example. Would be great, if you MacOS users could try it and tell me if the same happens on you computer. And of course any idea to fix this is appreciated.
SSCCE:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javafx.application.Platform;
import javafx.collections.ObservableList;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import com.sun.javafx.application.PlatformImpl;
/**
* SwingFXWebView
*/
public class JavaFXTest extends JPanel
{
private Stage stage;
private WebView browser;
private JFXPanel jfxPanel;
private JButton swingButton;
private WebEngine webEngine;
private Object geo;
public JavaFXTest()
{
this.initComponents();
}
public static void main(final String... args)
{
// Run this later:
SwingUtilities.invokeLater(new Runnable()
{
#Override
public void run()
{
final JFrame frame = new JFrame();
frame.getContentPane().add(new JavaFXTest());
frame.setMinimumSize(new Dimension(640, 480));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
private void initComponents()
{
this.jfxPanel = new JFXPanel();
this.createScene();
this.setLayout(new BorderLayout());
this.add(this.jfxPanel, BorderLayout.CENTER);
this.swingButton = new JButton();
this.swingButton.addActionListener(new ActionListener()
{
#Override
public void actionPerformed(final ActionEvent e)
{
Platform.runLater(new Runnable()
{
#Override
public void run()
{
JavaFXTest.this.webEngine.reload();
}
});
}
});
this.swingButton.setText("Reload");
this.add(this.swingButton, BorderLayout.SOUTH);
}
/**
* createScene Note: Key is that Scene needs to be created and run on
* "FX user thread" NOT on the AWT-EventQueue Thread
*/
private void createScene()
{
PlatformImpl.startup(new Runnable()
{
#Override
public void run()
{
JavaFXTest.this.stage = new Stage();
JavaFXTest.this.stage.setTitle("Hello Java FX");
JavaFXTest.this.stage.setResizable(true);
final Group root = new Group();
final Scene scene = new Scene(root, 80, 20);
JavaFXTest.this.stage.setScene(scene);
// Set up the embedded browser:
JavaFXTest.this.browser = new WebView();
JavaFXTest.this.webEngine = JavaFXTest.this.browser.getEngine();
JavaFXTest.this.webEngine.load("http://camendesign.com/code/video_for_everybody/test.html");
final ObservableList<Node> children = root.getChildren();
children.add(JavaFXTest.this.browser);
JavaFXTest.this.jfxPanel.setScene(scene);
}
});
}
}
Here is a semi-answer, which might help:
The oracle website states:"At this time, Online Installation and Java Update features are not available for 64-bit architectures"
For me this caused lots of problems, because Java seems up to date, but actually isn't. On some machines I could solve the actual issue by just manually updating the Java 64bit VM. On Mac however, the video still isn't playing, only sound.
The 64bit/32bit issue gets even worse, since a double click on a jar might start it in the 64bit JVM, but via console it is started in 32bit JVM. So if you do a "java -version" in console, the output might be "1.7.0 u45 32-bit", but as soon as you start the jar via double click it is started in an outdated 64bit JVM.
So if you ever run in an JavaFX issue (especially with UnsatisfiedLinkError) and you have a 64bit computer, just install the latest 64bit java and hope that it solves the problem.
JavaFx is supposed to be easily integrated in an SWT application (see here: http://docs.oracle.com/javafx/2/swt_interoperability/jfxpub-swt_interoperability.htm) and both toolkits use the same threading model.
However things get strange, when I open a dialog containing an FxCanvas which contains a JavaFx ComboBox. If I open the combo box popup menu and then close the dialog, the popup menu stays open. If I now move the mouse onto the popup a null pointer exception is thrown within javafx. When doing this within a larger application all JavaFx GUIs remain broken until the application is restarted.
Any ways to work around this?
Example code below: Close the dialog with 'Ok' or the window close button. Exit the application with 'Cancel'
package test;
import javafx.embed.swt.FXCanvas;
import javafx.geometry.Insets;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.StackPane;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TestFx {
static class MyDialog extends Dialog {
Parent w;
public MyDialog(Shell parent,Parent n) {
super(parent);
this.w = n;
setShellStyle(SWT.RESIZE| SWT.BORDER | SWT.TITLE |SWT.CLOSE );
}
#Override
public void cancelPressed() {
System.exit(0);
}
#Override
protected Control createDialogArea(Composite parent) {
Composite container = (Composite) super.createDialogArea(parent);
container.setLayout(new FillLayout());
FXCanvas fxCanvas = new FXCanvas(container, SWT.NONE);
Scene scene = new Scene(w);
fxCanvas.setScene(scene);
return container;
}
}
private static Parent createScene() {
StackPane pane = new StackPane();
pane.setPadding(new Insets(10));
ComboBox<String> c = new ComboBox<String>();
c.getItems().addAll("Test1","Test2");
pane.getChildren().add(c);
return pane;
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
while (true) {
MyDialog d = new MyDialog(shell,createScene());
d.open();
}
}
}
Exception:
java.lang.NullPointerException
at com.sun.javafx.tk.quantum.GlassScene.sceneChanged(GlassScene.java:290)
at com.sun.javafx.tk.quantum.ViewScene.sceneChanged(ViewScene.java:156)
at com.sun.javafx.tk.quantum.PopupScene.sceneChanged(PopupScene.java:30)
at com.sun.javafx.tk.quantum.GlassScene.markDirty(GlassScene.java:157)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2214)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:363)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:460)
at com.sun.javafx.tk.quantum.QuantumToolkit$9.run(QuantumToolkit.java:329)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2546)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3756)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at test.TestFx.main(TestFx.java:55)
At work we're developing some applications using JavaFX, on top of and old Swing platform and we also have found this issue.
Apparently it is caused by some issues on JFXPanel which is not correctly propagating some window events (focus, iconifying, etc) to the FX framework. The issue affects not only the ComboBox component, but every component that uses a PopupWindow (Menu, Tooltip, etc), specially when using Swing's JInternalFrame.
So, when a Popup is displaying and the window is minimized or closed, the Popup does not hide, causing the FX thread to crash if you try subsequently to interact with it.
The workaround mentioned above works, but only for ComboBox, as Menu and Tooltip does not inherit from the Node class, so didn't work for us :(
I developed another workaround which resolved the problem for all components that display popups, which basically forces all popups to close whenever a JFXPanel loses focus:
private static void initFX(final JFXPanel jfxPanel) {
final TestFxPanel parent = new TestFxPanel();
final Scene scene = new Scene(parent);
jfxPanel.setScene(scene);
jfxPanel.addFocusListener(new FocusAdapter() {
#Override
public void focusLost(final FocusEvent e) {
System.out.println(jfxPanel.getName() + ": FocusLost");
runFocusPatch(scene);
}
});
}
static void runFocusPatch(final Scene scene) {
Platform.runLater(new Runnable() {
#Override
public void run() {
System.out.println("Running patch");
final Iterator<Window> winIter = scene.getWindow().impl_getWindows();
while (winIter.hasNext()) {
final Window t = winIter.next();
if (t instanceof PopupWindow) {
System.out.println("Got a popup");
Platform.runLater(new Runnable() {
#Override
public void run() {
((PopupWindow) t).hide();
}
});
}
}
}
});
}
I confirm that the issue is NOT present in 8.0. Sadly we are not allowed to java 8 in production software as its still in beta stage.
best regards.
I found a workaround when using Java7: Override the close method in Dialog to hide the combo box popups:
#Override
public boolean close() {
Set<Node> nodes = w.lookupAll("#");
for (Node n : nodes)
if (n instanceof ComboBox)
((ComboBox)n).hide();
return super.close();
}
The trouble is discussed here : javafx-jira.kenai.com/browse/RT-30991
Developer has said, that the issue is fixed in JavaFX-8