Java FocusHandler類代碼示例

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
@Override
public HandlerRegistration addFocusHandler(FocusHandler handler) {
  if (!focusHandlerAdded) {
    focusHandlerAdded = true;
    final OrionTextViewOverlay textView = this.editorOverlay.getTextView();
    textView.addEventListener(
        OrionEventConstants.FOCUS_EVENT,
        new OrionTextViewOverlay.EventHandlerNoParameter() {

          @Override
          public void onEvent() {
            fireFocusEvent();
          }
        });
  }
  return addHandler(handler, FocusEvent.getType());
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
View(Window.Resources res, boolean showBottomPanel) {
  this.res = res;
  this.css = res.windowCss();
  windowWidth = com.google.gwt.user.client.Window.getClientWidth();
  clientLeft = Document.get().getBodyOffsetLeft();
  clientTop = Document.get().getBodyOffsetTop();
  initWidget(uiBinder.createAndBindUi(this));
  footer = new HTMLPanel("");
  if (showBottomPanel) {
    footer.setStyleName(res.windowCss().footer());
    contentContainer.add(footer);
  }
  handleEvents();

  FocusPanel dummyFocusElement = new FocusPanel();
  dummyFocusElement.setTabIndex(0);
  dummyFocusElement.addFocusHandler(
      new FocusHandler() {
        @Override
        public void onFocus(FocusEvent event) {
          setFocus();
        }
      });
  contentContainer.add(dummyFocusElement);
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public void listenTo(TextBoxBase tb) {
  strings.put(tb, tb.getText().trim());
  tb.addKeyPressHandler(this);

  // Is there another way to capture middle button X11 pastes in browsers
  // which do not yet support ONPASTE events (Firefox)?
  tb.addMouseUpHandler(this);

  // Resetting the "original text" on focus ensures that we are
  // up to date with non-user updates of the text (calls to
  // setText()...) and also up to date with user changes which
  // occurred after enabling "widget".
  tb.addFocusHandler(
      new FocusHandler() {
        @Override
        public void onFocus(FocusEvent event) {
          strings.put(tb, tb.getText().trim());
        }
      });

  // CTRL-V Pastes in Chrome seem only detectable via BrowserEvents or
  // KeyDownEvents, the latter is better.
  tb.addKeyDownHandler(this);
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
EnumEditorViewImpl(final List<String> enumValues, final List<String> enumDescriptions) {
  // Sets up a SuggestOracle that, when the textbox has focus, displays the
  // valid enum values and their descriptions.
  MultiWordSuggestOracle oracle = new MultiWordSuggestOracle();
  List<Suggestion> suggestions = Lists.newArrayList();
  for (int i = 0; i < enumValues.size(); i++) {
    suggestions.add(new EnumSuggestion(
        enumValues.get(i), enumDescriptions == null ? "" : enumDescriptions.get(i)));
  }
  oracle.setDefaultSuggestions(suggestions);
  this.suggestBox = new SuggestBox(oracle);
  suggestBox.getTextBox().addFocusHandler(new FocusHandler() {
    @Override
    public void onFocus(FocusEvent event) {
      suggestBox.showSuggestionList();
    }
  });
  add(suggestBox);

  this.errorMessage = new Label("This parameter is invalid.");
  errorMessage.setVisible(false);
  add(errorMessage);
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public void setFocusGained(JavaScriptObject aValue) {
	if (focusGained != aValue) {
		if (focusReg != null) {
			focusReg.removeHandler();
			focusReg = null;
		}
		focusGained = aValue;
		if (focusGained != null && component instanceof HasFocusHandlers) {
			focusReg = ((HasFocusHandlers) component).addFocusHandler(new FocusHandler() {
				@Override
				public void onFocus(FocusEvent event) {
					if (focusGained != null) {
						executeEvent(focusGained, EventsPublisher.publish(event));
					}
				}
			});
		}
	}
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public DateSelector()
{
	initWidget( textBox );

	textBox.addFocusHandler( new FocusHandler()
	{
		@Override
		public void onFocus( FocusEvent event )
		{
			if( !enabled )
				return;

			showPopup();
		}
	} );
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
/**
 * Allows to initialize the text box by setting up its listeners and styles.
 */
private void initialize() {
	//Set the base values and styles
	super.setStyleName( CommonResourcesContainer.GWT_TEXT_BOX_STYLE );
	this.addStyleName( CommonResourcesContainer.USER_DIALOG_SUGG_TEXT_BOX_STYLE );
	this.setText( helperText );
	//On gaining the focus
	addFocusHandler(new FocusHandler(){
		public void onFocus(FocusEvent event) {
			//If the focus is obtained and the text box value is set to empty if
			//the user text was not set, i.e. he have the helper message there
			if( TextBoxWithSuggText.super.getText().trim().equals( helperText ) ){
				TextBoxWithSuggText.super.setText( "" );
			}
			//Remove the suggestion style making the text be in another color
			removeStyleName( CommonResourcesContainer.USER_DIALOG_SUGG_TEXT_BOX_STYLE );
		}
	});
	//On loosing the focus
	addBlurHandler(new BlurHandler(){
		public void onBlur(BlurEvent e) {
			//If the text box looses the focus and the text is not set
			//then we set the helper text and the corresponding style 
			if( TextBoxWithSuggText.super.getText().trim().isEmpty() ){
				TextBoxWithSuggText.this.setText( null );
			}
		}
	});
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
/**
 * Sets the focus() event handler in many widgets
 * @param handler the handler
 * @param widgets the widgets
 */
public static void addFocusHandler(final FocusHandler handler,final HasFocusHandlers... widgets) {
	if (handler != null && widgets != null && widgets.length > 0) {
		for (HasFocusHandlers w : widgets) {
			if (w != null) w.addFocusHandler(handler);
		}
	}
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
@Override
FocusHandler getFocusHandler() {
  return new FocusHandler() {
    @Override
    public void onFocus(FocusEvent event) {
      cmB.focus();
    }
  };
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
@Override
FocusHandler getFocusHandler() {
  return new FocusHandler() {
    @Override
    public void onFocus(FocusEvent event) {
      cm.focus();
    }
  };
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public void enableDefaultSuggestions() {
  textBox.addFocusHandler(
      new FocusHandler() {
        @Override
        public void onFocus(FocusEvent focusEvent) {
          if (textBox.getText().equals("")) {
            suggestBox.showSuggestionList();
          }
        }
      });
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public PropertyEditorPasswordTextBox() {
    initWidget(uiBinder.createAndBindUi(this));
    passwordTextBox.addFocusHandler(new FocusHandler() {
        @Override
        public void onFocus(FocusEvent event) {
            passwordTextBox.selectAll();
        }
    });
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public PropertyEditorTextBox() {
    initWidget(uiBinder.createAndBindUi(this));
    textBox.addFocusHandler(new FocusHandler() {
        @Override
        public void onFocus(FocusEvent event) {
            textBox.selectAll();
        }
    });
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
public static FocusHandler createFocusListener(final EventListenerGVO ev, final List<InputVariableGVO> input) {
	return new FocusHandler() {
		public void onFocus(FocusEvent event) {
			CallbackHandler.createCallBack(event.getSource(), QAMLConstants.EVENT_ONFOCUS, ev, input);
		}
	};
}
 

import com.google.gwt.event.dom.client.FocusHandler; //導入依賴的package包/類
private static FocusHandler createFocusHandler(final ComponentGVO componentGVO, final EventListenerGVO eventGVO, final NotifyHandler notifyHandler, final String windowId, final String context, final AbstractActivity activity) {
	return new FocusHandler() {
		@Override
		public void onFocus(FocusEvent event) {
			UIObject widget = (UIObject)event.getSource();
			List<InputVariableGVO> inputVariables = eventGVO.getInputvariablesList();
			handleEvent(componentGVO, widget, eventGVO, event, QAMLConstants.EVENT_ONFOCUS, inputVariables, notifyHandler, windowId, context, activity);
		}
	};
}