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

Introduction

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

Prototype

@Override
    public void onBrowserEvent(Event event) 

Source Link

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//from  w  ww  .j a  v a  2 s.  c  o m
        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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