Java Code Examples for com.google.gwt.event.dom.client.KeyPressEvent

/**
 * Installs a key handler for key events on this window.
 *
 * @param handler handler to receive key events.
 */
static void install(KeySignalHandler handler) {
  //
  // NOTE: There are three potential candidate elements for sinking keyboard
  // events: the window, the document, and the document body. IE7 does not
  // fire events on the window element, and GWT's RootPanel is already a
  // listener on the body, leaving the document as the only cross-browser
  // whole-window event-sinking 'element'.
  //
  DocumentPanel panel = new DocumentPanel(handler);
  panel.setElement(Document.get().<Element>cast());
  panel.addDomHandler(panel, KeyDownEvent.getType());
  panel.addDomHandler(panel, KeyPressEvent.getType());
  panel.addDomHandler(panel, KeyUpEvent.getType());
  RootPanel.detachOnWindowClose(panel);
  panel.onAttach();
}
 

@UiHandler("searchBox")
void onSearchBox(KeyPressEvent event) {
	final InputText source = (InputText) event.getSource();
	Scheduler.get().scheduleDeferred(new ScheduledCommand() {

		@Override
		public void execute() {
			String query = source.flush();
			if (query == null || query.length() == 0) {
				displayList(displayedList);
			} else {
				final String queryToCompare = query.toLowerCase().trim();
				Iterable<Contact> filteredIteable = Iterables.filter(displayedList, new Predicate<Contact>() {

					@Override
					public boolean apply(Contact contact) {
						return contact.getName() != null && contact.getName().toLowerCase().contains(queryToCompare);
					}
				});
				displayList(Lists.newArrayList(filteredIteable));
			}
		}
	});
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
	int i = helpers.indexOf(currentHelper);
	if (currentHelper != null) {
		if (currentHelper.handleKeyPress(event)) {
			refreshValueBox();
			event.preventDefault();
		} else if (1 + i < helpers.size()) {
			if (!helpers.get(1 + i).handleKeyPress(event)
				&& 2 + i < helpers.size()) {
				focus(i + 1);
				helpers.get(2 + i).handleKeyPress(event);
			} else {
				focus(i + 1);
			}
		} else {
			event.preventDefault();
		}
	}
}
 

@UiHandler("searchBox")
void onSearchBox(KeyPressEvent event) {
	final InputText source = (InputText) event.getSource();
	Scheduler.get().scheduleDeferred(new ScheduledCommand() {

		@Override
		public void execute() {
			String query = source.flush();
			if (query == null || query.length() == 0) {
				AddressBookPage.this.displayList(AddressBookPage.this.displayedList);
			} else {
				final String queryToCompare = query.toLowerCase().trim();
				Iterable<Contact> filteredIteable =
					Iterables.filter(AddressBookPage.this.displayedList, new Predicate<Contact>() {

						@Override
						public boolean apply(Contact contact) {
							return contact.getName() != null
								&& contact.getName().toLowerCase().contains(queryToCompare);
						}
					});
				AddressBookPage.this.displayList(Lists.newArrayList(filteredIteable));
			}
		}
	});
}
 

/**
 * Installs a key handler for key events on this window.
 *
 * @param handler handler to receive key events.
 */
static void install(KeySignalHandler handler) {
  //
  // NOTE: There are three potential candidate elements for sinking keyboard
  // events: the window, the document, and the document body. IE7 does not
  // fire events on the window element, and GWT's RootPanel is already a
  // listener on the body, leaving the document as the only cross-browser
  // whole-window event-sinking 'element'.
  //
  DocumentPanel panel = new DocumentPanel(handler);
  panel.setElement(Document.get().<Element>cast());
  panel.addDomHandler(panel, KeyDownEvent.getType());
  panel.addDomHandler(panel, KeyPressEvent.getType());
  panel.addDomHandler(panel, KeyUpEvent.getType());
  RootPanel.detachOnWindowClose(panel);
  panel.onAttach();
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
  switch (event.getCharCode()) {
    case KeyCodes.KEY_END:
    case KeyCodes.KEY_DELETE:
    case KeyCodes.KEY_BACKSPACE:
      doSearch();
      break;
  }
}
 

/**
 * Adds a {@link KeyPressHandler} to the specified widget which calls {@link Button#click()} on <code>targetButton</code>
 * when the Enter key is pressed.
 * @param widget       widget to add the key handler to
 * @param targetButton target button to activate when the enter key is pressed
 */
public static void addEnterTarget( final HasKeyPressHandlers widget, final Button targetButton ) {
	widget.addKeyPressHandler( new KeyPressHandler() {
		@Override
		public void onKeyPress( final KeyPressEvent event ) {
			if ( event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER )
				targetButton.click();
		}
	} );
}
 

public NumberBox() {
	setStyleName("gwt-SuggestBox");
	setWidth("100px");
	getElement().getStyle().setTextAlign(TextAlign.RIGHT);
	addKeyPressHandler(new KeyPressHandler() {
		@Override
		public void onKeyPress(KeyPressEvent event) {
			if (!isEnabled() || isReadOnly()) return;
			
			int keyCode = event.getNativeEvent().getKeyCode();
			
			switch (keyCode) {
			case KeyCodes.KEY_BACKSPACE:
			case KeyCodes.KEY_DELETE:
			case KeyCodes.KEY_ESCAPE:
			case KeyCodes.KEY_RIGHT:
			case KeyCodes.KEY_LEFT:
			case KeyCodes.KEY_TAB:
				return;
			}

            if (isDecimal() && event.getCharCode() == '.' && !getValue().contains(".")) return;
            if (isNegative() && event.getCharCode() == '-' && !getValue().contains("-") && (getCursorPos() == 0 || getSelectionLength() == getValue().length()))
            	return;

            if (Character.isDigit(event.getCharCode()))
                return;

            cancelKey( );
        }
    } );
}
 

@EventHandler("itemNameInput")
public void onItemNameChanged(KeyPressEvent keyEvent) {
    if (keyEvent.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER) {
        presenter.onChangesOk();
    } else {
        presenter.onItemNameChanged();
    }
}
 

@EventHandler("itemNameInput")
public void onItemNameChanged(KeyPressEvent keyEvent) {
    if (keyEvent.getNativeEvent().getKeyCode() == KeyCodes.KEY_ENTER) {
        presenter.onChangesOk();
    } else {
        presenter.onItemNameChanged();
    }
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
	if (event.getCharCode() == KeyCodes.KEY_ENTER) {
		this.toggleOpen();
		event.preventDefault();
		event.stopPropagation();
	}
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
	boolean valid = false;
	char pressed = event.getCharCode();
	for (char c : ALLOWED_CHARS) {
		if (c == pressed) {
			valid = true;
			break;
		}
	}
	if (!valid) {
		event.preventDefault();
		event.stopPropagation();
	}
}
 

@Override
protected boolean handleKeyPress(KeyPressEvent event) {
	boolean b = handleKeyPress(event.getCharCode());
	if (b) {
		event.preventDefault();
		event.stopPropagation();
	}
	return b;
}
 

public HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
  return addDomHandler(handler, KeyPressEvent.getType());
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
  dispatch(event);
}
 

@Override
public com.google.gwt.event.shared.HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
	return this.addDomHandler(handler, KeyPressEvent.getType());
}
 

@Override
public HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
	return this.addDomHandler(handler, KeyPressEvent.getType());
}
 

protected boolean handleKeyPress(KeyPressEvent event) {
	return handleKeyPress(event.getCharCode());
}
 

@Override
public HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
	return this.addDomHandler(handler, KeyPressEvent.getType());
}
 

@Override
public void onKeyPress(KeyPressEvent event) {
  dispatch(event);
}