| [SWT][Thread] Strange Exception [message #38128] |
Fri, 13 December 2002 13:18  |
Eclipse User |
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Originally posted by: yolepro.hotmail.com
Hello, I have a strange problem using Thread with SWT Display.
The error message that i have is the following :
org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(SWT.java:2119)
at org.eclipse.swt.SWT.error(SWT.java:2051)
at org.eclipse.swt.widgets.Widget.error(Widget.java:370)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:301)
at org.eclipse.swt.custom.StyledText.setText(StyledText.java:69 99)
at TestSWT.errPrint(TestSWT.java:56)
at ChatLecteur.run(ChatLecteur.java:26)
at java.lang.Thread.run(Unknown Source)
When I use Swing with a JFrame it works correctly
My main class :
public class ClientApplication
boolean packFrame = false;
public ClientApplication()
TestSwing frameSwing = new TestSwing();
TestSWT frameSWT = new TestSWT();
frameSwing.start();
frameSWT.start();
}
public static void main(String[] args)
new ClientApplication();
}
}
Nothing complicated for the main, now is the code for main SWING interface
that work correctly :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestSwing extends JFrame
JPanel contentPane;
JTextField jTFWriting = new JTextField();
JButton jBSend = new JButton();
GridLayout gridBagLayout1 = new GridLayout();
public void
rt(){
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(gridBagLayout1);
this.setSize(new Dimension(240, 50));
jBSend.addActionListener(new TestSwing_Connexion_actionAdapter(this));
contentPane.add(jTFWriting);
contentPane.add(jBSend);
this.setVisible(true);
}
public void connecter() {
try {
ChatLecteurSwing chatlecteur = new ChatLecteurSwing(this);
(new Thread(chatlecteur)).start();
} catch(Exception exception) {
errPrint("Grosse Erreur de Thread");
}
}
public void errPrint (
String msg) {jTFWriting.setText(msg);}
public void msgPrint (String msg) {jTFWriting.setText(msg);}
}
class TestSwing_Connexion_actionAdapter implements ActionListener
TestSwing adaptee;
TestSwing_Connexion_actionAdapter(TestSwing adaptee)
this.adaptee = adaptee;
}
public void actionPerformed(ActionEvent e)
adaptee.connecter();
}
}
class ChatLecteurSwing implements Runnable
private TestSwing ihm;
ChatLecteurSwing(TestSwing ihm)
this.ihm = ihm;
}
public void run()
String s = "Diffusion de la mort";
try
if(s == null)
ihm.errPrint("Votre message n'est pas conforme");
return;
} else
ihm.errPrint(s);
}
}catch(Exception exception)
ihm.errPrint("ChatLecteur erreur: " + exception);
return;
}
}
}
Now the problem is for the pretty same SWT class that genere SWTException
when I click on the butt1 button. This button run a Thread that gives me a
static response :
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.layout.*;
public class TestSWT
protected StyledText butt2;
public void start ()
Display display = new Display ();
Shell shell = new Shell (display);
GridLayout gridLayout = new GridLayout();
shell.setLayout(gridLayout);
Composite c1 = new Composite(shell, SWT.BORDER);
gridLayout = new GridLayout();
gridLayout.numColumns = 3;
c1.setLayout(gridLayout);
c1.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Button butt1 = new Button(c1, SWT.PUSH);
butt2 = new StyledText (c1, SWT.SINGLE | SWT.BORDER);
butt1.addListener (SWT.Selection, new
ClientSWT_Connexion_actionAdapter(this));
GridData gridData = new GridData();
gridData.widthHint = 40;
butt1.setLayoutData(gridData);
gridData = new GridData(GridData.FILL_HORIZONTAL);
gridData.horizontalSpan = 2;
butt2.setLayoutData(gridData);
shell.pack ();
shell.open ();
shell.setSize(200,70);
while (!shell.isDisposed ())
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
public void connecter()
try
ChatLecteurSWT chatlecteur = new ChatLecteurSWT(this);
(new Thread(chatlecteur)).start();
} catch(Exception exception)
errPrint("Grosse Erreur de Thread");
}
}
public void errPrint (String msg) {butt2.setText(msg);}
public void msgPrint (String msg) {butt2.setText(msg);}
}
class ClientSWT_Connexion_actionAdapter implements Listener
TestSWT adaptee;
ClientSWT_Connexion_actionAdapter(TestSWT adaptee) {this.adaptee =
adaptee;}
public void handleEvent(Event e) {adaptee.connecter();}
}
class ChatLecteurSWT implements Runnable
private TestSWT ihm;
ChatLecteurSWT(TestSWT ihm)
this.ihm = ihm;
}
public void run()
String s = "Diffusion de la mort";
try
if(s == null)
ihm.errPrint("Votre message n'est pas conforme");
return;
} else
ihm.errPrint(s);
}
}catch(Exception exception)
ihm.errPrint("ChatLecteur erreur: " + exception);
return;
}
}
}
You can see these too classes are relatively the same. But i can't
understand why with SWT I have a Exception
I Hope I have been clear, and problably you will find quickly with i'm doing
wrong.
Thanks
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