Examples with KeyListener org.eclipse.swt.events.KeyListener used on opensource projects

Example 66 with KeyListener

use of org.eclipse.swt.events.KeyListener in project tdi-studio-se by Talend.

the class SqlMemoController method createControl.

/*
     * (non-Javadoc)
     * 
     * @see
     * org.talend.designer.core.ui.editor.properties2.editors.AbstractElementPropertySectionController#createControl
     * (org.eclipse.swt.widgets.Composite, org.talend.core.model.process.IElementParameter, int, int, int,
     * org.eclipse.swt.widgets.Control)
     */
@Override
public Control createControl(Composite subComposite, IElementParameter param, int numInRow, int nbInRow, int top, Control lastControl) {
    this.curParameter = param;
    this.paramFieldType = param.getFieldType();
    switchParam = elem.getElementParameter(EParameterName.REPOSITORY_ALLOW_AUTO_SWITCH.getName());
    final DecoratedField dField1 = new DecoratedField(subComposite, SWT.PUSH, new IControlCreator() {

        @Override
        public Control createControl(Composite parent, int style) {
            return new Button(parent, style);
        }
    });
    Control buttonControl = dField1.getLayoutControl();
    openSQLEditorButton = (Button) dField1.getControl();
    openSQLEditorButton.computeSize(SWT.DEFAULT, SWT.DEFAULT);
    openSQLEditorButton.setImage(ImageProvider.getImage(CoreUIPlugin.getImageDescriptor(DOTS_BUTTON)));
    buttonControl.setBackground(subComposite.getBackground());
    openSQLEditorButton.setEnabled(true);
    openSQLEditorButton.setData(NAME, SQLEDITOR);
    openSQLEditorButton.setData(PARAMETER_NAME, param.getName());
    openSQLEditorButton.setEnabled(!param.isReadOnly());
    openSQLEditorButton.addSelectionListener(listenerSelection);
    if (param.getFieldType() == EParameterFieldType.MEMO_SQL) {
        openSQLEditorButton.setEnabled(ExtractMetaDataUtils.getInstance().haveLoadMetadataNode());
    }
    // Added by Marvin Wang on Dec.13, 2012 for bug TDI-7559.
    //$NON-NLS-1$
    IElementParameter typePara = elem.getElementParameter("TYPE");
    if (typePara != null && "Hive".equalsIgnoreCase((String) typePara.getValue())) {
        //$NON-NLS-1$
        openSQLEditorButton.setVisible(false);
    }
    if (typePara != null && "Impala".equalsIgnoreCase((String) typePara.getValue())) {
        //$NON-NLS-1$
        openSQLEditorButton.setVisible(false);
    }
    FormData data1 = new FormData();
    data1.right = new FormAttachment(100, -ITabbedPropertyConstants.HSPACE);
    data1.left = new FormAttachment(100, -(ITabbedPropertyConstants.HSPACE + STANDARD_BUTTON_WIDTH));
    data1.top = new FormAttachment(0, top);
    buttonControl.setLayoutData(data1);
    int nbLines = param.getNbLines();
    IControlCreator txtCtrl = new IControlCreator() {

        @Override
        public Control createControl(final Composite parent, final int style) {
            return createColorStyledText(parent, style);
        }
    };
    DecoratedField dField = null;
    if (param.getNbLines() != 1) {
        dField = new DecoratedField(subComposite, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL, txtCtrl);
    } else {
        dField = new DecoratedField(subComposite, SWT.BORDER, txtCtrl);
    }
    if (param.isRequired()) {
        FieldDecoration decoration = FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_REQUIRED);
        dField.addFieldDecoration(decoration, SWT.RIGHT | SWT.TOP, false);
    }
    Control cLayout = dField.getLayoutControl();
    queryText = (ColorStyledText) dField.getControl();
    queryText.setData(PARAMETER_NAME, param.getName());
    editionControlHelper.register(param.getName(), queryText);
    FormData d = (FormData) queryText.getLayoutData();
    if (getAdditionalHeightSize() != 0) {
        nbLines += this.getAdditionalHeightSize() / queryText.getLineHeight();
    }
    d.height = queryText.getLineHeight() * nbLines;
    FormData data;
    queryText.getParent().setSize(subComposite.getSize().x, queryText.getLineHeight() * nbLines);
    cLayout.setBackground(subComposite.getBackground());
    // for bug 7580
    if (!(queryText instanceof ColorStyledText)) {
        queryText.setEnabled(!param.isReadOnly());
    } else {
        queryText.setEditable(!param.isReadOnly());
    }
    if (elem instanceof Node) {
        queryText.setToolTipText(VARIABLE_TOOLTIP + param.getVariableName());
    }
    queryText.addKeyListener(new KeyListener() {

        @Override
        public void keyPressed(KeyEvent e) {
            if (switchParam != null) {
                switchParam.setValue(Boolean.FALSE);
            }
        }

        @Override
        public void keyReleased(KeyEvent e) {
        }
    });
    if (param.isReadOnly() && param.isRepositoryValueUsed()) {
        cLayout.addMouseListener(listenerClick);
    }
    addDragAndDropTarget(queryText);
    CLabel labelLabel = getWidgetFactory().createCLabel(subComposite, param.getDisplayName());
    data = new FormData();
    if (lastControl != null) {
        data.left = new FormAttachment(lastControl, 0);
    } else {
        data.left = new FormAttachment((((numInRow - 1) * MAX_PERCENT) / nbInRow), 0);
    }
    data.top = new FormAttachment(0, top);
    labelLabel.setLayoutData(data);
    if (numInRow != 1) {
        labelLabel.setAlignment(SWT.RIGHT);
    }
    // *********************
    data = new FormData();
    int currentLabelWidth = STANDARD_LABEL_WIDTH;
    GC gc = new GC(labelLabel);
    Point labelSize = gc.stringExtent(param.getDisplayName());
    gc.dispose();
    if ((labelSize.x + ITabbedPropertyConstants.HSPACE) > currentLabelWidth) {
        currentLabelWidth = labelSize.x + ITabbedPropertyConstants.HSPACE;
    }
    if (numInRow == 1) {
        if (lastControl != null) {
            data.left = new FormAttachment(lastControl, currentLabelWidth);
        } else {
            data.left = new FormAttachment(0, currentLabelWidth);
        }
    } else {
        data.left = new FormAttachment(labelLabel, 0, SWT.RIGHT);
    }
    data.right = new FormAttachment(buttonControl, -5, SWT.LEFT);
    data.top = new FormAttachment(0, top);
    cLayout.setLayoutData(data);
    // **********************
    hashCurControls.put(param.getName(), queryText);
    Point initialSize = dField.getLayoutControl().computeSize(SWT.DEFAULT, SWT.DEFAULT);
    // curRowSize = initialSize.y + ITabbedPropertyConstants.VSPACE;
    dynamicProperty.setCurRowSize(initialSize.y + ITabbedPropertyConstants.VSPACE);
    return null;
}

Example 67 with KeyListener

use of org.eclipse.swt.events.KeyListener in project tdi-studio-se by Talend.

the class ToolbarSearchZone method addCommonsComponentListeners.

private void addCommonsComponentListeners() {
    final SearchZoneMapper searchZoneMapper = new SearchZoneMapper(mapperManager);
    searchText.addKeyListener(new KeyListener() {

        public void keyPressed(KeyEvent e) {
            // if change the search text ,need clear the data .
            hightLightAllButton.setSelection(false);
            searchZoneMapper.setHightlightAll(hightLightAllButton.getSelection());
            if (searchMaps.size() > 0) {
                searchZoneMapper.hightlightAll(searchMaps, false);
                searchMaps.clear();
            }
            if (e.keyCode == SWT.CR || e.keyCode == SWT.KEYPAD_CR) {
                e.doit = false;
                searchZoneMapper.search(searchMaps, searchText.getText());
                selectKey = searchZoneMapper.selectHightlight(searchMaps, 0, "first");
            }
        }

        public void keyReleased(KeyEvent e) {
        }
    });
    downTableButton.addListener(SWT.Selection, new Listener() {

        public void handleEvent(Event event) {
            if (searchMaps.isEmpty()) {
                searchZoneMapper.search(searchMaps, searchText.getText());
            }
            if (selectKey + 1 < searchMaps.size()) {
                if (!searchZoneMapper.isHightlightAll()) {
                    searchZoneMapper.hightlightAll(searchMaps, false);
                } else {
                    searchZoneMapper.hightlightAll(searchMaps, true);
                }
            }
            Integer selectKeyAtTableItem = searchZoneMapper.getSelectedKeyAtSelectedTableItem(searchMaps);
            if (selectKeyAtTableItem > 0) {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, selectKeyAtTableItem, "next");
            } else if (selectKeyAtTableItem == 0 && selectKey == -1) {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, 0, "first");
            } else {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, selectKey, "next");
            }
        }
    });
    upTableButton.addListener(SWT.Selection, new Listener() {

        public void handleEvent(Event event) {
            if (searchMaps.isEmpty()) {
                searchZoneMapper.search(searchMaps, searchText.getText());
            }
            if (selectKey > 0) {
                if (!searchZoneMapper.isHightlightAll()) {
                    searchZoneMapper.hightlightAll(searchMaps, false);
                } else {
                    searchZoneMapper.hightlightAll(searchMaps, true);
                }
            }
            Integer selectKeyAtTableItem = searchZoneMapper.getSelectedKeyAtSelectedTableItem(searchMaps);
            if (selectKeyAtTableItem > 0) {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, selectKeyAtTableItem, "previous");
            } else if (selectKeyAtTableItem == 0 && selectKey == -1) {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, 0, "first");
            } else {
                selectKey = searchZoneMapper.selectHightlight(searchMaps, selectKey, "previous");
            }
        }
    });
    hightLightAllButton.addListener(SWT.Selection, new Listener() {

        public void handleEvent(Event event) {
            if (hightLightAllButton.getSelection()) {
                searchMaps.clear();
                searchZoneMapper.search(searchMaps, searchText.getText());
            }
            searchZoneMapper.setHightlightAll(hightLightAllButton.getSelection());
            searchZoneMapper.hightlightAll(searchMaps, hightLightAllButton.getSelection());
        }
    });
}

Example 68 with KeyListener

use of org.eclipse.swt.events.KeyListener in project eclipse.platform.text by eclipse.

the class HyperlinkDetectorsConfigurationBlock method createControl.

@Override
public Control createControl(Composite parent) {
    PixelConverter pixelConverter = new PixelConverter(parent);
    Composite composite = new Composite(parent, SWT.NONE);
    GridLayout layout = new GridLayout();
    layout.numColumns = 2;
    layout.marginHeight = 0;
    layout.marginWidth = 0;
    composite.setLayout(layout);
    addFiller(composite, 2);
    String label = TextEditorMessages.HyperlinksEnabled_label;
    fHyperlinksEnabledCheckBox = addCheckBox(composite, label, AbstractDecoratedTextEditorPreferenceConstants.EDITOR_HYPERLINKS_ENABLED, 0);
    fHyperlinksEnabledCheckBox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            boolean state = fHyperlinksEnabledCheckBox.getSelection();
            fHyperlinkDefaultKeyModifierText.setEnabled(state);
            fHyperlinkKeyModifierText.setEnabled(state && getSelectedItem() != null);
            fHyperlinkDetectorsViewer.getTable().setEnabled(state);
            handleHyperlinkKeyModifierModified();
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
        }
    });
    // Text field for default modifier string
    label = TextEditorMessages.HyperlinkDefaultKeyModifier_label;
    fHyperlinkDefaultKeyModifierText = (Text) addTextField(composite, label, AbstractDecoratedTextEditorPreferenceConstants.EDITOR_HYPERLINK_KEY_MODIFIER, 15, 20, pixelConverter)[1];
    fHyperlinkDefaultKeyModifierText.addKeyListener(new KeyListener() {

        private boolean isModifierCandidate;

        @Override
        public void keyPressed(KeyEvent e) {
            isModifierCandidate = e.keyCode > 0 && e.character == 0 && e.stateMask == 0;
        }

        @Override
        public void keyReleased(KeyEvent e) {
            if (isModifierCandidate && e.stateMask > 0 && e.stateMask == e.stateMask && e.character == 0) {
                // && e.time -time < 1000) {
                String modifierString = fHyperlinkDefaultKeyModifierText.getText();
                Point selection = fHyperlinkDefaultKeyModifierText.getSelection();
                int i = selection.x - 1;
                while (i > -1 && Character.isWhitespace(modifierString.charAt(i))) {
                    i--;
                }
                boolean needsPrefixDelimiter = i > -1 && !String.valueOf(modifierString.charAt(i)).equals(MODIFIER_DELIMITER);
                i = selection.y;
                while (i < modifierString.length() && Character.isWhitespace(modifierString.charAt(i))) {
                    i++;
                }
                boolean needsPostfixDelimiter = i < modifierString.length() && !String.valueOf(modifierString.charAt(i)).equals(MODIFIER_DELIMITER);
                String insertString;
                if (needsPrefixDelimiter && needsPostfixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertDelimiterAndModifierAndDelimiter, Action.findModifierString(e.stateMask));
                else if (needsPrefixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertDelimiterAndModifier, Action.findModifierString(e.stateMask));
                else if (needsPostfixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertModifierAndDelimiter, Action.findModifierString(e.stateMask));
                else
                    insertString = Action.findModifierString(e.stateMask);
                fHyperlinkDefaultKeyModifierText.insert(insertString);
            }
        }
    });
    fHyperlinkDefaultKeyModifierText.addModifyListener(new ModifyListener() {

        @Override
        public void modifyText(ModifyEvent e) {
            handleHyperlinkDefaultKeyModifierModified();
        }
    });
    addFiller(composite, 2);
    Composite editorComposite = new Composite(composite, SWT.NONE);
    GridData gd;
    gd = new GridData(SWT.FILL, SWT.TOP, true, false);
    gd.horizontalSpan = 2;
    gd.horizontalIndent = 20;
    editorComposite.setLayoutData(gd);
    TableColumnLayout tableColumnlayout = new TableColumnLayout();
    editorComposite.setLayout(tableColumnlayout);
    // Hyperlink detector table
    Table hyperlinkDetectorTable = new Table(editorComposite, SWT.H_SCROLL | SWT.V_SCROLL | SWT.SINGLE | SWT.BORDER | SWT.FULL_SELECTION | SWT.CHECK);
    hyperlinkDetectorTable.setHeaderVisible(true);
    hyperlinkDetectorTable.setLinesVisible(true);
    hyperlinkDetectorTable.setFont(parent.getFont());
    hyperlinkDetectorTable.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            handleListSelection();
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
        }
    });
    ColumnLayoutData columnLayoutData = new ColumnWeightData(1);
    TableColumn nameColumn = new TableColumn(hyperlinkDetectorTable, SWT.NONE, 0);
    nameColumn.setText(TextEditorMessages.HyperlinkDetectorTable_nameColumn);
    tableColumnlayout.setColumnData(nameColumn, columnLayoutData);
    TableColumn modifierKeysColumn = new TableColumn(hyperlinkDetectorTable, SWT.NONE, 1);
    modifierKeysColumn.setText(TextEditorMessages.HyperlinkDetectorTable_modifierKeysColumn);
    tableColumnlayout.setColumnData(modifierKeysColumn, columnLayoutData);
    TableColumn targetNameColumn = new TableColumn(hyperlinkDetectorTable, SWT.NONE, 2);
    targetNameColumn.setText(TextEditorMessages.HyperlinkDetectorTable_targetNameColumn);
    tableColumnlayout.setColumnData(targetNameColumn, columnLayoutData);
    fHyperlinkDetectorsViewer = new CheckboxTableViewer(hyperlinkDetectorTable);
    fHyperlinkDetectorsViewer.setUseHashlookup(true);
    fHyperlinkDetectorsViewer.addCheckStateListener(new ICheckStateListener() {

        @Override
        public void checkStateChanged(CheckStateChangedEvent event) {
            String id = ((ListItem) event.getElement()).id;
            if (id == null)
                return;
            fStore.setValue(id, !event.getChecked());
        }
    });
    fHyperlinkDetectorsViewer.setLabelProvider(new ItemLabelProvider());
    fHyperlinkDetectorsViewer.setContentProvider(new ItemContentProvider());
    gd = new GridData(SWT.FILL, SWT.FILL, true, false);
    gd.heightHint = pixelConverter.convertHeightInCharsToPixels(10);
    fHyperlinkDetectorsViewer.getControl().setLayoutData(gd);
    // addFiller(composite, 2);
    // Text field for modifier string
    label = TextEditorMessages.HyperlinkKeyModifier_label;
    fHyperlinkKeyModifierText = (Text) addTextField(composite, label, null, 15, 20, pixelConverter)[1];
    fHyperlinkKeyModifierText.addKeyListener(new KeyListener() {

        private boolean isModifierCandidate;

        @Override
        public void keyPressed(KeyEvent e) {
            isModifierCandidate = e.keyCode > 0 && e.character == 0 && e.stateMask == 0;
        }

        @Override
        public void keyReleased(KeyEvent e) {
            if (isModifierCandidate && e.stateMask > 0 && e.stateMask == e.stateMask && e.character == 0) {
                // && e.time -time < 1000) {
                String modifierString = fHyperlinkKeyModifierText.getText();
                Point selection = fHyperlinkKeyModifierText.getSelection();
                int i = selection.x - 1;
                while (i > -1 && Character.isWhitespace(modifierString.charAt(i))) {
                    i--;
                }
                boolean needsPrefixDelimiter = i > -1 && !String.valueOf(modifierString.charAt(i)).equals(MODIFIER_DELIMITER);
                i = selection.y;
                while (i < modifierString.length() && Character.isWhitespace(modifierString.charAt(i))) {
                    i++;
                }
                boolean needsPostfixDelimiter = i < modifierString.length() && !String.valueOf(modifierString.charAt(i)).equals(MODIFIER_DELIMITER);
                String insertString;
                if (needsPrefixDelimiter && needsPostfixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertDelimiterAndModifierAndDelimiter, Action.findModifierString(e.stateMask));
                else if (needsPrefixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertDelimiterAndModifier, Action.findModifierString(e.stateMask));
                else if (needsPostfixDelimiter)
                    insertString = NLSUtility.format(TextEditorMessages.HyperlinkKeyModifier_insertModifierAndDelimiter, Action.findModifierString(e.stateMask));
                else
                    insertString = Action.findModifierString(e.stateMask);
                fHyperlinkKeyModifierText.insert(insertString);
            }
        }
    });
    fHyperlinkKeyModifierText.addModifyListener(new ModifyListener() {

        @Override
        public void modifyText(ModifyEvent e) {
            handleHyperlinkKeyModifierModified();
        }
    });
    return composite;
}

Example 69 with KeyListener

use of org.eclipse.swt.events.KeyListener in project eclipse.platform.text by eclipse.

the class AbstractControlContentAssistSubjectAdapter method installControlListener.

/**
 * Installs <code>fControlListener</code>, which handles VerifyEvents and KeyEvents by
 * passing them to {@link #fVerifyKeyListeners} and {@link #fKeyListeners}.
 */
private void installControlListener() {
    if (DEBUG)
        // $NON-NLS-1$ //$NON-NLS-2$
        System.out.println("AbstractControlContentAssistSubjectAdapter#installControlListener() -> k: " + fKeyListeners.size() + ", v: " + fVerifyKeyListeners.size());
    if (fControlListener != null)
        return;
    fControlListener = new Listener() {

        @Override
        public void handleEvent(Event e) {
            if (!getControl().isFocusControl())
                // SWT.TRAVERSE_MNEMONIC events can also come in to inactive widgets
                return;
            VerifyEvent verifyEvent = new VerifyEvent(e);
            KeyEvent keyEvent = new KeyEvent(e);
            switch(e.type) {
                case SWT.Traverse:
                    if (DEBUG)
                        // $NON-NLS-1$
                        dump("before traverse", e, verifyEvent);
                    verifyEvent.doit = true;
                    for (VerifyKeyListener verifyKeyListener : fVerifyKeyListeners) {
                        verifyKeyListener.verifyKey(verifyEvent);
                        if (!verifyEvent.doit) {
                            e.detail = SWT.TRAVERSE_NONE;
                            e.doit = true;
                            if (DEBUG)
                                // $NON-NLS-1$
                                dump("traverse eaten by verify", e, verifyEvent);
                            return;
                        }
                        if (DEBUG)
                            // $NON-NLS-1$
                            dump("traverse OK", e, verifyEvent);
                    }
                    break;
                case SWT.KeyDown:
                    for (VerifyKeyListener verifyKeyListener : fVerifyKeyListeners) {
                        verifyKeyListener.verifyKey(verifyEvent);
                        if (!verifyEvent.doit) {
                            e.doit = verifyEvent.doit;
                            if (DEBUG)
                                // $NON-NLS-1$
                                dump("keyDown eaten by verify", e, verifyEvent);
                            return;
                        }
                    }
                    if (DEBUG)
                        // $NON-NLS-1$
                        dump("keyDown OK", e, verifyEvent);
                    for (KeyListener keyListener : fKeyListeners) {
                        keyListener.keyPressed(keyEvent);
                    }
                    break;
                default:
                    Assert.isTrue(false);
            }
        }

        /**
         * Dump the given events to "standard" output.
         *
         * @param who who dump's
         * @param e the event
         * @param ve the verify event
         */
        private void dump(String who, Event e, VerifyEvent ve) {
            // $NON-NLS-1$
            StringBuilder sb = new StringBuilder("--- [AbstractControlContentAssistSubjectAdapter]\n");
            sb.append(who);
            // $NON-NLS-1$
            sb.append(" - e: keyCode=" + e.keyCode + hex(e.keyCode));
            // $NON-NLS-1$
            sb.append("; character=" + e.character + hex(e.character));
            // $NON-NLS-1$
            sb.append("; stateMask=" + e.stateMask + hex(e.stateMask));
            // $NON-NLS-1$
            sb.append("; doit=" + e.doit);
            // $NON-NLS-1$
            sb.append("; detail=" + e.detail + hex(e.detail));
            // $NON-NLS-1$
            sb.append("; widget=" + e.widget);
            // $NON-NLS-1$
            sb.append("\n");
            // $NON-NLS-1$
            sb.append("  verifyEvent keyCode=" + e.keyCode + hex(e.keyCode));
            // $NON-NLS-1$
            sb.append("; character=" + e.character + hex(e.character));
            // $NON-NLS-1$
            sb.append("; stateMask=" + e.stateMask + hex(e.stateMask));
            // $NON-NLS-1$
            sb.append("; doit=" + ve.doit);
            // $NON-NLS-1$
            sb.append("; widget=" + e.widget);
            System.out.println(sb);
        }

        private String hex(int i) {
            // $NON-NLS-1$
            return "[0x" + Integer.toHexString(i) + ']';
        }
    };
    getControl().addListener(SWT.Traverse, fControlListener);
    getControl().addListener(SWT.KeyDown, fControlListener);
    if (DEBUG)
        // $NON-NLS-1$
        System.out.println("AbstractControlContentAssistSubjectAdapter#installControlListener() - installed");
}

Example 70 with KeyListener

use of org.eclipse.swt.events.KeyListener in project eclipse.platform.text by eclipse.

the class CompletionProposalPopup2 method showProposals.

/**
 * Computes and presents completion proposals. The flag indicates whether this call has
 * be made out of an auto activation context.
 *
 * @param autoActivated <code>true</code> if auto activation context
 * @return an error message or <code>null</code> in case of no error
 */
public String showProposals(final boolean autoActivated) {
    if (fKeyListener == null) {
        fKeyListener = new KeyListener() {

            @Override
            public void keyPressed(KeyEvent e) {
                if (!Helper2.okToUse(fProposalShell))
                    return;
                if (e.character == 0 && e.keyCode == SWT.CTRL) {
                    // http://dev.eclipse.org/bugs/show_bug.cgi?id=34754
                    int index = fProposalTable.getSelectionIndex();
                    if (index >= 0)
                        selectProposal(index, true);
                }
            }

            @Override
            public void keyReleased(KeyEvent e) {
                if (!Helper2.okToUse(fProposalShell))
                    return;
                if (e.character == 0 && e.keyCode == SWT.CTRL) {
                    // http://dev.eclipse.org/bugs/show_bug.cgi?id=34754
                    int index = fProposalTable.getSelectionIndex();
                    if (index >= 0)
                        selectProposal(index, false);
                }
            }
        };
    }
    final StyledText styledText = fViewer.getTextWidget();
    if (styledText != null && !styledText.isDisposed())
        styledText.addKeyListener(fKeyListener);
    // BusyIndicator.showWhile(styledText.getDisplay(), new Runnable() {
    // public void run() {
    fInvocationOffset = fViewer.getSelectedRange().x;
    // lazily compute proposals
    // if (fComputedProposals == null)	fComputedProposals= computeProposals(fContentAssistant.getCompletionPosition());
    fComputedProposals = computeProposals(fInvocationOffset);
    int count = (fComputedProposals == null ? 0 : fComputedProposals.length);
    if (count == 0) {
        if (!autoActivated)
            styledText.getDisplay().beep();
    } else {
        if (count == 1 && !autoActivated && fContentAssistant.isAutoInserting())
            insertProposal(fComputedProposals[0], (char) 0, 0, fInvocationOffset);
        else {
            if (fLineDelimiter == null)
                fLineDelimiter = styledText.getLineDelimiter();
            createProposalSelector();
            setProposals(fComputedProposals);
            resizeProposalSelector(true);
            displayProposals();
        }
    }
    return getErrorMessage();
}