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Old 09-08-2010, 04:06 AM   #1
mb12mb
LQ Newbie
 
Registered: Sep 2010
Posts: 1

Rep: Reputation: 0
Helios : Using tab on text field having content proposals, crashes my application


Using content proposal in helios, giving problem if u press tab.
Below is the error.
For recreation snippet is provided(taken from 2 sites) after error log.
Only u need to press tab while proposal pop up is visible & then point mouse at client.
#################################ERROR LOG#############################
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00002aaadc1cafc1, pid=12936, tid=1076615488
#
# JRE version: 6.0_21-b06
# Java VM: Java HotSpot(TM) 64-Bit Server VM (17.0-b16 mixed mode linux-amd64 )
# Problematic frame:
# C [libswt-pi-gtk-3650.so+0x3bfc1] Java_org_eclipse_swt_internal_gtk_OS_GTK_1WIDGET_1WINDOW+0x0
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#



Stack: [0x00000000401bd000,0x00000000402be000], sp=0x00000000402bae08, free space=3f70000000000000018k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libswt-pi-gtk-3650.so+0x3bfc1] Java_org_eclipse_swt_internal_gtk_OS_GTK_1WIDGET_1WINDOW+0x0
j org.eclipse.swt.widgets.Shell.filterProc(JJJ)J+297
J org.eclipse.swt.widgets.Display.filterProc(JJJ)J
V [libjvm.so+0x3e756d]
V [libjvm.so+0x5f6f59]
V [libjvm.so+0x3e73a5]
V [libjvm.so+0x420904]
V [libjvm.so+0x3fefe1]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J org.eclipse.swt.internal.gtk.OS.GTK_WIDGET_WINDOW(J)J
j org.eclipse.swt.widgets.Shell.filterProc(JJJ)J+297
J org.eclipse.swt.widgets.Display.filterProc(JJJ)J
v ~StubRoutines::call_stub
J org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(JZ)Z
J org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(JZ)Z
#####################################################################


####################PROGRAM#######################################

import java.text.ParseException;

import org.eclipse.jface.bindings.keys.IKeyLookup;
import org.eclipse.jface.bindings.keys.KeyLookupFactory;
import org.eclipse.jface.bindings.keys.KeyStroke;
import org.eclipse.jface.fieldassist.ContentProposalAdapter;
import org.eclipse.jface.fieldassist.ControlDecoration;
import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
import org.eclipse.jface.fieldassist.IContentProposalListener2;
import org.eclipse.jface.fieldassist.IContentProposalProvider;
import org.eclipse.jface.fieldassist.SimpleContentProposalProvider;
import org.eclipse.jface.fieldassist.TextContentAdapter;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewerEditor;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.FocusCellHighlighter;
import org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TableViewerEditor;
import org.eclipse.jface.viewers.TableViewerFocusCellManager;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Text;

/**
* Shows how to attach content assist to a text cell editor.
*
* @author Mario Winterer
*/
public class TestContentProposal {
private static class Color {
public String name;

public Color(String name) {
this.name = name;
}

public String toString() {
return name;
}
}

public static class TextCellEditorWithContentProposal extends TextCellEditor {

private ContentProposalAdapter contentProposalAdapter;
private boolean popupOpen = false; // true, iff popup is currently open

public TextCellEditorWithContentProposal(Composite parent, IContentProposalProvider contentProposalProvider,
KeyStroke keyStroke, char[] autoActivationCharacters) {
super(parent);

enableContentProposal(contentProposalProvider, keyStroke, autoActivationCharacters);
}

private void enableContentProposal(IContentProposalProvider contentProposalProvider, KeyStroke keyStroke,
char[] autoActivationCharacters) {
contentProposalAdapter = new ContentProposalAdapter(text, new TextContentAdapter(),
contentProposalProvider, keyStroke, autoActivationCharacters);

// Listen for popup open/close events to be able to handle focus events correctly
contentProposalAdapter.addContentProposalListener(new IContentProposalListener2() {

public void proposalPopupClosed(ContentProposalAdapter adapter) {
popupOpen = false;
}

public void proposalPopupOpened(ContentProposalAdapter adapter) {
popupOpen = true;
}
});
}

/**
* Return the {@link ContentProposalAdapter} of this cell editor.
*
* @return the {@link ContentProposalAdapter}
*/
public ContentProposalAdapter getContentProposalAdapter() {
return contentProposalAdapter;
}

protected void focusLost() {
if (!popupOpen) {
// Focus lost deactivates the cell editor.
// This must not happen if focus lost was caused by activating
// the completion proposal popup.
super.focusLost();
}
}

protected boolean dependsOnExternalFocusListener() {
// Always return false;
// Otherwise, the ColumnViewerEditor will install an additional focus listener
// that cancels cell editing on focus lost, even if focus gets lost due to
// activation of the completion proposal popup. See also bug 58777.
return false;
}
}

private static class ColorNameEditingSupport extends EditingSupport {
private TextCellEditorWithContentProposal cellEditor;

public ColorNameEditingSupport(TableViewer viewer) {
super(viewer);

IContentProposalProvider contentProposalProvider = new SimpleContentProposalProvider(new String[] { "red",
"green", "blue" });
cellEditor = new TextCellEditorWithContentProposal(viewer.getTable(), contentProposalProvider, null, null);
}

protected boolean canEdit(Object element) {
return (element instanceof Color);
}

protected CellEditor getCellEditor(Object element) {
return cellEditor;
}

protected Object getValue(Object element) {
return ((Color) element).name;
}

protected void setValue(Object element, Object value) {
((Color) element).name = value.toString();
getViewer().update(element, null);
}

}
public void setFocus() {
}
private void createDeco(Text text, String s){

}

public TestContentProposal(Shell shell) {

/////////////////////////////
GridLayout layout = new GridLayout(2,false);
shell.setLayout(layout);
Label label = new Label(shell, SWT.NONE);
label.setText("Please select a value: ");
Text text = new Text(shell, SWT.BORDER);
createDeco(text, "Use CNTL + SPACE to see possible values");
GridData data = new GridData(GridData.FILL_HORIZONTAL);
text.setLayoutData(data);
ControlDecoration deco = new ControlDecoration(text, SWT.LEFT);
deco.setDescriptionText("Use CNTL + SPACE to see possible values");
deco.setImage(FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_IN FORMATION).getImage());
deco.setShowOnlyOnFocus(false);
// Help the user with the possible inputs
// "." and "#" will also activate the content proposals
char[] autoActivationCharacters = new char[] { '.', '#' };
KeyStroke keyStroke;
try {
//
keyStroke = KeyStroke.getInstance("Ctrl+Space");

// assume that myTextControl has already been created in some way
ContentProposalAdapter adapter = new ContentProposalAdapter(text,
new TextContentAdapter(),
new SimpleContentProposalProvider(new String[] {
"ProposalOne", "ProposalTwo", "ProposalThree" }),
null, null);
adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);
} catch (org.eclipse.jface.bindings.keys.ParseException e) {
e.printStackTrace();
}



///////////////////////////////
final TableViewer viewer = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);
final Table table = viewer.getTable();
table.setLinesVisible(true);
table.setHeaderVisible(true);

final TableViewerColumn colorColumn = new TableViewerColumn(viewer, SWT.LEFT);
colorColumn.getColumn().setText("Color name");
colorColumn.getColumn().setWidth(200);
colorColumn.setLabelProvider(new ColumnLabelProvider());
colorColumn.setEditingSupport(new ColorNameEditingSupport(viewer));

viewer.setContentProvider(new ArrayContentProvider());

ColumnViewerEditorActivationStrategy activationSupport = new ColumnViewerEditorActivationStrategy(viewer) {
protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) {
return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
|| event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC
|| (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && event.keyCode == KeyLookupFactory
.getDefault().formalKeyLookup(IKeyLookup.ENTER_NAME));
}
};
activationSupport.setEnableEditorActivationWithKeyboard(true);

/*
* Without focus highlighter, keyboard events will not be delivered to
* ColumnViewerEditorActivationStragety#isEditorActivationEvent(...) (see above)
*/
FocusCellHighlighter focusCellHighlighter = new FocusCellOwnerDrawHighlighter(viewer);
TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(viewer, focusCellHighlighter);

TableViewerEditor.create(viewer, focusCellManager, activationSupport, ColumnViewerEditor.TABBING_VERTICAL
| ColumnViewerEditor.KEYBOARD_ACTIVATION);

viewer.setInput(createModel());
}

private Color[] createModel() {
return new Color[] { new Color("red"), new Color("green") };
}

/**
* @param args
*/
public static void main(String[] args) {
Display display = new Display();

Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new TestContentProposal(shell);
shell.open();

while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}

display.dispose();
}
}
######################################################################
 
Old 09-12-2010, 02:32 AM   #2
14moose
Member
 
Registered: May 2010
Posts: 83

Rep: Reputation: Disabled
Try recoding the GUI in Java Swing instead of Eclipse SWT.

The problem seems to be with SWT, the GUI library Eclipse uses by default. SWT is written in C/C++ (and merely interfaces to Java), so it's inherently less portable than Swing (which s written entirely in Java).

Perhaps there's actually a bug in your code. But, based on the information you provided, I think it's more likely it's either configuration, or a bug in your version of libswt-pi-gtk-3650.so.

Last edited by 14moose; 09-12-2010 at 01:12 PM.
 
  


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