Example usage for com.google.gwt.user.client.ui ValueBoxBase setCursorPos

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui ValueBoxBase setCursorPos.

Prototype

public void setCursorPos(int pos) 

Source Link

Document

Sets the cursor position.

Usage

From source file:org.jboss.errai.otec.client.atomizer.Atomizer.java

License:Apache License

public static AtomizerSession syncWidgetWith(final OTEngine engine, final OTEntity entity,
        final ValueBoxBase widget) {
    LogUtil.log("NEW ATOMIZER SESSION (engine:" + engine.getId() + ", widget=" + widget + ")");

    final Multimap<Object, HandlerRegistration> HANDLER_REGISTRATION_MAP = HashMultimap.create();
    final EntityChangeStreamImpl entityChangeStream = new EntityChangeStreamImpl(engine, entity);

    final EntityStreamRegistration entityStreamRegistration = engine.getPeerState()
            .addEntityStream(entityChangeStream);

    widget.setValue(entity.getState().get());

    HANDLER_REGISTRATION_MAP.put(widget, widget.addKeyDownHandler(new KeyDownHandler() {
        @Override/* w  w w .j a  v  a 2s .c  om*/
        public void onKeyDown(final KeyDownEvent event) {
            if (shouldIgnoreKeyPress(event)) {
                return;
            }

            if (widget.getSelectedText().length() > 0) {
                stopEvents();
                entityChangeStream.notifyDelete(widget.getCursorPos(), widget.getSelectedText());
                startEvents();
            } else if (event.getNativeKeyCode() == KeyCodes.KEY_BACKSPACE) {
                stopEvents();
                final int index = widget.getCursorPos() - 1;
                entityChangeStream.notifyDelete(index, " ");
                startEvents();
            } else if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
                stopEvents();
                entityChangeStream.notifyInsert(widget.getCursorPos(), "\n");
                startEvents();
            }
        }
    }));

    HANDLER_REGISTRATION_MAP.put(widget, widget.addKeyPressHandler(new KeyPressHandler() {
        @Override
        public void onKeyPress(final KeyPressEvent event) {
            if (event.getUnicodeCharCode() != 13 && event.getUnicodeCharCode() != 0) {
                stopEvents();
                entityChangeStream.notifyInsert(widget.getCursorPos(), String.valueOf(event.getCharCode()));
                startEvents();
            }
        }
    }));

    DOM.setEventListener(widget.getElement(), new EventListener() {
        @Override
        public void onBrowserEvent(Event event) {
            if (event.getTypeInt() == Event.ONPASTE) {
                final String before = (String) entity.getState().get();
                new Timer() {
                    @Override
                    public void run() {
                        final String after = (String) widget.getValue();
                        final DiffUtil.Delta diff = DiffUtil.diff(before, after);

                        stopEvents();
                        entityChangeStream.notifyInsert(diff.getCursor(), diff.getDeltaText());
                        startEvents();
                    }
                }.schedule(1);
            }
            widget.onBrowserEvent(event);
        }
    });

    attachCutHandler(widget.getElement(), new Runnable() {
        @Override
        public void run() {
            stopEvents();
            entityChangeStream.notifyDelete(widget.getCursorPos(), widget.getSelectedText());
            startEvents();
        }
    });

    attachTextDragHandler(widget.getElement(), new Runnable() {
        @Override
        public void run() {
            stopEvents();
            entityChangeStream.notifyDelete(widget.getCursorPos(), widget.getSelectedText());
            entityChangeStream.flush();
            startEvents();
        }
    }, new Runnable() {
        @Override
        public void run() {
            final String old = (String) entity.getState().get();
            new Timer() {
                @Override
                public void run() {
                    final DiffUtil.Delta diff = DiffUtil.diff(old, (String) widget.getValue());
                    if (diff.getDeltaText().length() > 0) {
                        stopEvents();
                        entityChangeStream.notifyInsert(diff.getCursor(), diff.getDeltaText());
                        startEvents();
                    }
                }
            }.schedule(1);
        }
    });

    final ListenerRegistration listenerRegistration = entity.getState()
            .addStateChangeListener(new StateChangeListener() {
                @Override
                public int getCursorPos() {
                    return widget.getCursorPos();
                }

                @Override
                public void onStateChange(final int newCursorPos, final Object newValue) {
                    if (NO_PROPAGATE_STATE_CHANGE) {
                        return;
                    }

                    widget.setValue(newValue, false);
                    widget.setCursorPos(newCursorPos);
                }
            });

    DOM.sinkEvents(widget.getElement(), DOM.getEventsSunk(widget.getElement()) | Event.ONPASTE);

    final Timer timer = new Timer() {
        @Override
        public void run() {
            entityChangeStream.flush();
        }
    };
    timer.scheduleRepeating(500);

    return new AtomizerSession() {
        @Override
        public void end() {
            entityChangeStream.close();
            timer.cancel();

            LogUtil.log("END ATOMIZER SESSION");
            entityStreamRegistration.remove();
            listenerRegistration.remove();
            final Collection<HandlerRegistration> values = HANDLER_REGISTRATION_MAP.values();
            for (final HandlerRegistration value : values) {
                value.removeHandler();
            }
        }
    };
}

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