Right, so Ive got an interesting problem here concerning SWT and swing integration on mac running java 1.7. Im trying to embed an SWT Browser widget into my swing project as a panel which is pretty simple to do on java version 1.6. There has been a number of posts which explain how to do this with SWT_AWT bridge classes along with the following example:
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class MySWTBrowserTest implements ActionListener {
public JButton addCodeButton;
public JButton launchBrowserButton;
public JTextField inputCode;
public JFrame frame;
static Display display;
static boolean exit;
public MySWTBrowserTest() {
frame = new JFrame("Main Window");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new FlowLayout());
inputCode = new JTextField(15);
inputCode.setText("999");
addCodeButton = new JButton("Add Code");
addCodeButton.addActionListener(this);
addCodeButton.setActionCommand("addcode");
launchBrowserButton = new JButton("Launch Browser");
launchBrowserButton.addActionListener(this);
launchBrowserButton.setActionCommand("launchbrowser");
mainPanel.add(inputCode);
mainPanel.add(addCodeButton);
mainPanel.add(launchBrowserButton);
frame.getContentPane().add(mainPanel, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("addcode")) {
} else if (e.getActionCommand().equals("launchbrowser")) {
createAndShowBrowser();
}
}
public void createAndShowBrowser() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final Canvas canvas = new Canvas();
f.setSize(850, 650);
f.getContentPane().add(canvas);
f.setVisible(true);
display.asyncExec(new Runnable() {
#Override
public void run() {
Shell shell = SWT_AWT.new_Shell(display, canvas);
shell.setSize(800, 600);
Browser browser = new Browser(shell, SWT.NONE);
browser.setLayoutData(new GridData(GridData.FILL_BOTH));
browser.setSize(800, 600);
browser.setUrl("http://www.google.com");
shell.open();
}
});
}
public static void main(String args[]) {
//SWT_AWT.embeddedFrameClass = "sun.lwawt.macosx.CEmbeddedFrame";
display = new Display();
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
MySWTBrowserTest mySWTBrowserTest = new MySWTBrowserTest();
}
});
while (!exit) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}
Im using the swt-3.8M5-cocoa-macosx-x86_64 JAR files which obviously need to be included to run the above example. When using both the 32 bit and 64 bit versions of the 1.6 JDK, this runs perfectly fine, but when switching to the JDK 1.7 or 1.8 VM the reproducible error is thrown:
2012-05-14 15:11:30.534 java[1514:707] Cocoa AWT: Apple AWT Java VM was loaded on first thread -- can't start AWT. (
0 liblwawt.dylib 0x00000008db728ad0 JNI_OnLoad + 468
1 libjava.dylib 0x00000001015526f1 Java_java_lang_ClassLoader_00024NativeLibrary_load + 207
2 ??? 0x00000001015a4f90 0x0 + 4317663120
)
_NSJVMLoadLibrary: NSAddLibrary failed for /libjawt.dylib
JavaVM FATAL: lookup of function JAWT_GetAWT failed. Exit
Java Result: 255
Ive inspected the java 1.7 vm and did find the libraries there, so Im struggling to see what could cause it to not load that library. Of course I make sure to use: -XstartOnFirstThread as one of the VM parameters, as is required for the SWING/AWT integration.
On a further note, I have tried the DJ Native Widgets framework, and it throws the exact same error as it also uses the underlying SWT framework.
To reproduce the effects i suggest installing JDK 1.7 (release not the developer preview) on mac, downloading the: http://www.eclipse.org/downloads/download.php?file=/eclipse/downloads/drops4/S-4.2M7-201205031800/swt-S-4.2M7-201205031800-cocoa-macosx-x86_64.zip to get the library and then running it with the -XstartOnFirstThread -d64 java 1.7 vm.
really hoping someone has been able to sort this out as Im sure Im not the only one trying to integrate SWT into swing on the 1.7 vm
I also spent 8 hours on google to see if this error has been reproduced anywhere else, and it has come up on a few Matlab mailing lists, but other than that I haven't been able to find something even close to a solution.
Thanks in advance.
>> UPDATE 1
Looks like we may have a winner: https://bugs.eclipse.org/bugs/show_bug.cgi?id=374199
Going to monitor this and see where it goes.
>> UPDATE 2
Here is a working example: https://stackoverflow.com/a/27754819/363573
Unfortunately there's no good answer to this. In Java 7 the AWT has been completely rewritten to use CoreAnimation layers. The SWT assumes that an AWT Canvas will be backed by an NSView but that's no longer the case. Your only choice right now is to stick with Java 6.
The AWT team is aware of the problem but you may want to file another bug on bugs.sun.com.
Related
I'm on Ubuntu 15.04 and I have written following program:
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
public class TimeTable extends Frame {
private Frame frame;
public TimeTable(){
setupGUI();
}
private void setupGUI(){
frame = new Frame("TimeTable");
frame.setSize(400, 400);
frame.addWindowListener(new WindowAdapter(){
public void wndClose(WindowEvent wndEvent){
System.exit(0);
}
});
frame.setVisible(true);
}
public static void main(String[] args){
TimeTable timetable = new TimeTable();
}
}
It should be a little GUI (AWT) Test-Window.
I build it with:
>> javac TimeTable.java
And run it with:
>> java TimeTable
The ICON of the AWT APP is shown in my Launcher Sidebar, but the Window doesn't appears on my Desktop.
Why not?
You can install Java on Ubuntu without graphics libraries (headless?).
Install the standard Java including graphics libraries and it should work. Your code works fine on Windows inside IntelliJ.
I'm running a Swing application using JDK 1.7.0_45 on Windows 7. It uses a JFileChooser, which it creates with the no argument constructor, which makes the starting directory my Documents folder. I'd like to change this starting directory, without changing the source code, which I don't have, by setting the user.home system variable via -Duser.home=some-dir.
There is code in sun.awt.shell.ShellFolderManager that is supposed to make that happen, and on another forum, someone claimed it did work for him, also with Java 7 and Windows 7. When I step through his source example though, I'm getting a subclass of ShellFolderManager called sun.awt.shell.Win32ShellFolderManager2, which works differently and doesn't look at user.home. Why would that be different for him and me given the same source code, and Windows and Java versions?
Here's the source I'm working with:
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.io.IOException;
import javax.swing.*;
public class TestFileChooser {
public static void main(final String[] args) throws IOException {
System.out.println(System.getProperty("user.home"));
final JFrame frame = new JFrame("Test");
frame.setSize(300, 200);
final JFileChooser fileChooser = new JFileChooser();
final JButton button = new JButton(new AbstractAction() {
#Override
public void actionPerformed(final ActionEvent e) {
fileChooser.showOpenDialog(frame);
}
});
button.setText("Open");
frame.add(button,BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
After done a LFS(linuxfromscratch) system, I has 2 problems with input, some applications like google docs (presentations edit in browsers) and some java apps apparently do not recognize the keyboard input, the first one was resolved adding UTF-8 locale, but the java no way.
So I do some research and limited it in a awt scope. It means all apps writed in java awt do not recognize the keyboard inputs.
I tried http://docs.oracle.com/javase/7/docs/webnotes/tsg/TSG-Desktop/html/awt.html , but no success to solve the issue.
I too recompiled the libXt after the new locale.
I don't have Qt, awt is qt dependent?
Using eclipse(which is java app and do not have the issue), I created a little app using awt to reproduce the problem. The problem is here but it's don't give a stack trace nor a message warning.
From this moment I haven't idea how to solve or track this issue.
Some help/tip?
Here a simple program to reproduce the problem (jdk1.7.0_21)
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Choice;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.TextArea;
public class testmain extends java.applet.Applet{
public void init()
{
Panel p;
setLayout(new BorderLayout());
p = new Panel();
TextArea x = new TextArea();
x.setFocusTraversalKeysEnabled(true);
x.setText("asdf");
x.setEditable(true);
p.add(x);
add("Center", p);
p = new Panel();
p.add(new Button("One"));
p.add(new Button("Two"));
Choice c = new Choice();
c.addItem("one");
c.addItem("two");
c.addItem("three");
p.add(c);
add("South", p);
}
public static void main(String [] args)
{
Frame f = new Frame("Example 4");
testmain ex = new testmain();
ex.init();
f.add("Center", ex);
f.pack();
f.show();
}
}
I am using JWindow in my project to display a UI that is undecorated and also doesn't appear in the task bar. But, the JWindow always seems to be on top of all other windows. I tried setting the setAlwaysOnTop to false, but it didn't seem to help.
Here's the code that can reproduce the problem :
package test;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JWindow;
public class Test extends JWindow implements ActionListener {
public Test() {
setSize(300, 300);
setLocationRelativeTo(null);
setAlwaysOnTop(false);
JButton myButton = new JButton("Click Here");
myButton.addActionListener(this);
getContentPane().add(myButton);
setVisible(true);
}
public static void main(String[] args) {
new Test();
}
#Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand().equals("Click Here"))
JOptionPane.showMessageDialog(this, "This dialog box appears behind the JWindow!");
}
}
My OS is Linux and I'm using the Oracle JDK 6. Also, while I was testing my app on Windows, I was using JDialog for the UI and it was working fine. But, in Linux JDialog seems to appear in the task bar.
Any help as to how to solve this?
After you set the visibility of the window to True, you send it to the back like this:
setVisible(true);
toBack();
If, later, you want to bring it to the top of the stacking order, you simply call:
toFront();
More details here:
http://docs.oracle.com/javase/6/docs/api/java/awt/Window.html#toBack()
http://docs.oracle.com/javase/6/docs/api/java/awt/Window.html#toFront()
I was looking for a way to integrate a Web-Browser-Component in an existing Swing-Application and found WebView for Java FX 2.0. Furthermore I found a blog post on java.net showing how to integrate a Java FX component into a Swing Application . So I guess it might be doable, but I haven't tried yet.
I'm curious, do you think this is a good approach? Are there any better solutions? Is it even doable? Is maybe something prebundled out there?
The motivation is: I want to integrate some WebBrowser-whatever into an existing Swing-Application, the long-term goal being to get rid of the whole Java Desktop Application at all, replacing it with a web-based solution (the plan is to slowly convert existing aspects into webpages which are then displayed in the WebBrowser-Component until nothing is left of the swing application except for the browser-skeleton). The backend of course remains Java :-)
I haven't tried yet since I simply lack the time to integrate JavaFX with my project (its a job, we're just exploring alternatives fpr the long run), so I better ask before I get burned.
It is very well possible!
One has to install JavaFX 2.0, and somehow manage to have jfxrt.jar in the Classpath.
The following code renders a JFXPanel inside a JFrame. The JFXPanel contains a WebView which loads google.com.
However, at least on my machine, the WebView feels rather sloppy. I'm working on Mac OS X 10.6; JavaFX 2.0 is still in beta for OS X.
Alternatives I found include MozSwing, which looked very promising and feels quite fast actually. Sadly the project is not being developed any further since 2008 and the bundled XUL runner is rather old (no new fancy html 5).
Both approaches are a nightmare to include via maven, you better setup your own local repository.
import java.awt.Dimension;
import java.awt.Point;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
public class JavaFX {
/* Create a JFrame with a JButton and a JFXPanel containing the WebView. */
private static void initAndShowGUI() {
// This method is invoked on Swing thread
JFrame frame = new JFrame("FX");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null); // do the layout manually
final JButton jButton = new JButton("Button");
final JFXPanel fxPanel = new JFXPanel();
frame.add(jButton);
frame.add(fxPanel);
frame.setVisible(true);
jButton.setSize(new Dimension(200, 27));
fxPanel.setSize(new Dimension(300, 300));
fxPanel.setLocation(new Point(0, 27));
frame.getContentPane().setPreferredSize(new Dimension(300, 327));
frame.pack();
frame.setResizable(false);
Platform.runLater(new Runnable() { // this will run initFX as JavaFX-Thread
#Override
public void run() {
initFX(fxPanel);
}
});
}
/* Creates a WebView and fires up google.com */
private static void initFX(final JFXPanel fxPanel) {
Group group = new Group();
Scene scene = new Scene(group);
fxPanel.setScene(scene);
WebView webView = new WebView();
group.getChildren().add(webView);
webView.setMinSize(300, 300);
webView.setMaxSize(300, 300);
// Obtain the webEngine to navigate
WebEngine webEngine = webView.getEngine();
webEngine.load("http://www.google.com/");
}
/* Start application */
public static void main(final String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
initAndShowGUI();
}
});
}
}