| (Eclipse Forms) FormText.setText() crash [message #443465] |
Fri, 24 September 2004 21:34  |
 Jaakko Lindvall
Messages: 9
Registered: July 2009 |
Junior Member |
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Hi,
I've been following the examples from the excellent Eclipse Forms guide
found in
http://dev.eclipse.org/viewcvs/index.cgi/~checkout~/pde-ui-h ome/working/EclipseForms/EclipseForms.html.
I've noticed that whenever I try to pass in a String that contains an URL
to FormText's setText() method, the program crashes. The same crash also
occurs if I use <form>-tags and describe the link using <a href..>.
The following test case is essentially the same as the example found in
the guide:
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.forms.widgets.*;
public class FormsCrashTest
{
public static void main(String args[])
{
Display display = new Display();
Shell shell = new Shell();
shell.setLayout(new GridLayout(1, false));
FormToolkit toolkit = new FormToolkit(Display.getCurrent());
Form form = toolkit.createForm(shell);
TableWrapLayout layout = new TableWrapLayout();
form.getBody().setLayout(layout);
FormText rtext = toolkit.createFormText(form.getBody(), true);
String data = "Plain text, http://www.eclipse.org";
// String data2 = "Plain text only"; // Doesn't crash with this
rtext.setText(data, false, true); // Tag detection off, hyperlink
detection on
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
}
}
When I run this program, I get this stack trace:
java.lang.NullPointerException
at java.util.Hashtable.put(Unknown Source)
at
org.eclipse.ui.internal.forms.widgets.HyperlinkSegment.paint (HyperlinkSegment.java:45)
at
org.eclipse.ui.internal.forms.widgets.Paragraph.paint(Paragr aph.java:151)
at org.eclipse.ui.forms.widgets.FormText.paint(FormText.java:80 0)
at org.eclipse.ui.forms.widgets.FormText.access$3(FormText.java :762)
at org.eclipse.ui.forms.widgets.FormText$2.paintControl(FormTex t.java:226)
at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListe ner.java:82)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java :82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:820)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:805)
at org.eclipse.swt.widgets.Composite.WM_PAINT(Composite.java:80 3)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3020 )
at org.eclipse.swt.widgets.Display.windowProc(Display.java:3338 )
at org.eclipse.swt.internal.win32.OS.UpdateWindow(Native Method)
at org.eclipse.swt.widgets.Decorations.setVisible(Decorations.j ava:1213)
at org.eclipse.swt.widgets.Shell.setVisible(Shell.java:1175)
at org.eclipse.swt.widgets.Shell.open(Shell.java:767)
at org.verkel.apps.test.swt.FormsCrashTest.main(FormsCrashTest. java:27)
My environment is Windows XP and I'm using Eclipse 3.0.
Thanks in advance,
Jaakko Lindvall
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