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

Example 46 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 47 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();
}