This is a developer error. You can't call invoke and wait from an event
method because invoke and wait puts your new runnable on the queue but
since you are waiting from the queue itself it hangs. You need to comb your
codebase and deal with this issue. These invoke methods are to be used
outside the AWT dispatch thread.
-m
On Mon, Nov 18, 2013 at 2:51 PM, Viral Barot <vba...@tibco.com> wrote:
> Accessing AWT frame from a thread causes the application to freeze when
> executed with JRE 7. The AWT frame is created with SWT_AWT bridge.
>
> Below is the test case in which call to frame.setVisible(true); from the
> AWT event dispatching thread does not return.
>
> Test Case:
> import java.awt.Button;
> import java.awt.Color;
> import java.awt.event.ActionEvent;
> import java.awt.event.ActionListener;
> import java.lang.reflect.InvocationTargetException;
>
> import javax.swing.JOptionPane;
> import javax.swing.SwingUtilities;
>
> import org.eclipse.swt.SWT;
> import org.eclipse.swt.awt.SWT_AWT;
> import org.eclipse.swt.layout.GridLayout;
> import org.eclipse.swt.widgets.Display;
> import org.eclipse.swt.widgets.Shell;
> import org.eclipse.swt.widgets.Composite;
>
> public class Main {
>
> public static void main(String[] args) {
>
>
>
> if(System.getProperty("os.name").toLowerCase().startsWith("mac")){
> SWT_AWT.embeddedFrameClass = "sun.lwawt.macosx.CViewEmbeddedFrame";
> }
>
>
> Display display = new Display();
> Shell shell = new Shell(display);
> shell.setText("Shell");
> shell.setSize(200, 200);
>
> shell.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_BLUE));
>
>
>
> final Composite composite = new Composite(shell, SWT.EMBEDDED);
> GridLayout gridLayout = new GridLayout();
> gridLayout.numColumns = 1;
> composite.setLayout(gridLayout);
> composite.setSize(200,200);
>
> composite.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_WHITE));
>
>
>
> final java.awt.Frame frame = SWT_AWT.new_Frame(composite);
> frame.setVisible(false);
> frame.setBackground(Color.red);
> frame.setSize(200, 200);
> Button button = new Button("Submit");
> button.addActionListener(new ActionListener() {
>
>
> @Override
> public void actionPerformed(ActionEvent e) {
>
>
> JOptionPane.showMessageDialog(null, "Hello");
> }
> });
> frame.add(button);
> frame.doLayout();
>
>
>
> try {
> SwingUtilities.invokeAndWait(new Runnable() {
>
>
> @Override
> public void run() {
> frame.setVisible(true);
> }
> });
> } catch (InterruptedException e1) {
> e1.printStackTrace();
> } catch (InvocationTargetException e1) {
> e1.printStackTrace();
> }
> shell.open();
>
>
>
> while (!shell.isDisposed()) {
> if (!display.readAndDispatch())
> display.sleep();
> }
> display.dispose();
>
>
>
> }
> }
>
> Below is the thread dump for this.
>
> "AWT-EventQueue-0" prio=5 tid=0x00007f8d0b087000 nid=0x8703 runnable
> [0x0000000195e40000]
> java.lang.Thread.State: RUNNABLE
> at sun.lwawt.macosx.CCursorManager.nativeGetCursorPosition(Native Method)
> at
> sun.lwawt.macosx.CCursorManager.getCursorPosition(CCursorManager.java:54)
> at sun.lwawt.LWCursorManager.updateCursorImpl(LWCursorManager.java:79)
> at sun.lwawt.LWCursorManager.updateCursor(LWCursorManager.java:56)
> at
> sun.lwawt.LWComponentPeer.updateCursorImmediately(LWComponentPeer.java:852)
> at java.awt.Component.updateCursorImmediately(Component.java:3123)
> at java.awt.Component.show(Component.java:1626)
> - locked <0x0000000160c5b8c8> (a java.awt.Component$AWTTreeLock)
> at java.awt.Window.show(Window.java:1042)
> at sun.awt.EmbeddedFrame.show(EmbeddedFrame.java:179)
> at java.awt.Component.show(Component.java:1651)
> at java.awt.Component.setVisible(Component.java:1603)
> at java.awt.Window.setVisible(Window.java:1014)
> at Main$2.run(Main.java:60)
> at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
> at java.awt.EventQueue.access$200(EventQueue.java:103)
> at java.awt.EventQueue$3.run(EventQueue.java:694)
> at java.awt.EventQueue$3.run(EventQueue.java:692)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
> at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
> at
> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
> at
> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
> at
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
> at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
> at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
>
> Locked ownable synchronizers:
> - None
>
> While in the above test case if invokeLater is called instead of
> invokeAndWait, the test case runs fine. But in my application the
> invokeLater calls also freeze at same location.
>
> This behavoir happens with SWT 3.7.2 as well as 4.3.
>
>
>
>
>
--
--------------------------------------------------------------------------------------
Disco Mike - Amphicoelous (Original Mix)
Now available on Beatport
Buy it now at: http://btprt.dj/WeaNGz
