/*
* Copyright 2000-2014 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.client.ui.button;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.FocusEvent;
import com.google.gwt.event.dom.client.FocusHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.DOM;
import com.vaadin.client.EventHelper;
import com.vaadin.client.MouseEventDetailsBuilder;
import com.vaadin.client.annotations.OnStateChange;
import com.vaadin.client.communication.StateChangeEvent;
import com.vaadin.client.ui.AbstractComponentConnector;
import com.vaadin.client.ui.Icon;
import com.vaadin.client.ui.VButton;
import com.vaadin.shared.MouseEventDetails;
import com.vaadin.shared.communication.FieldRpc.FocusAndBlurServerRpc;
import com.vaadin.shared.ui.Connect;
import com.vaadin.shared.ui.Connect.LoadStyle;
import com.vaadin.shared.ui.button.ButtonServerRpc;
import com.vaadin.shared.ui.button.ButtonState;
import com.vaadin.ui.Button;
@Connect(value = Button.class, loadStyle = LoadStyle.EAGER)
public class ButtonConnector extends AbstractComponentConnector implements
BlurHandler, FocusHandler, ClickHandler {
private HandlerRegistration focusHandlerRegistration = null;
private HandlerRegistration blurHandlerRegistration = null;
@Override
public boolean delegateCaptionHandling() {
return false;
}
@Override
public void init() {
super.init();
getWidget().addClickHandler(this);
getWidget().client = getConnection();
}
@OnStateChange("errorMessage")
void setErrorMessage() {
if (null != getState().errorMessage) {
if (getWidget().errorIndicatorElement == null) {
getWidget().errorIndicatorElement = DOM.createSpan();
getWidget().errorIndicatorElement
.setClassName("v-errorindicator");
}
getWidget().wrapper.insertFirst(getWidget().errorIndicatorElement);
} else if (getWidget().errorIndicatorElement != null) {
getWidget().wrapper.removeChild(getWidget().errorIndicatorElement);
getWidget().errorIndicatorElement = null;
}
}
@OnStateChange("resources")
void onResourceChange() {
if (getWidget().icon != null) {
getWidget().wrapper.removeChild(getWidget().icon.getElement());
getWidget().icon = null;
}
Icon icon = getIcon();
if (icon != null) {
getWidget().icon = icon;
icon.setAlternateText(getState().iconAltText);
getWidget().wrapper.insertBefore(icon.getElement(),
getWidget().captionElement);
}
}
@Override
public void onStateChanged(StateChangeEvent stateChangeEvent) {
super.onStateChanged(stateChangeEvent);
focusHandlerRegistration = EventHelper.updateFocusHandler(this,
focusHandlerRegistration);
blurHandlerRegistration = EventHelper.updateBlurHandler(this,
blurHandlerRegistration);
}
@OnStateChange({ "caption", "htmlContentAllowed" })
void setCaption() {
String caption = getState().caption;
if (getState().htmlContentAllowed) {
getWidget().setHtml(caption);
} else {
getWidget().setText(caption);
}
}
@OnStateChange("iconAltText")
void setIconAltText() {
if (getWidget().icon != null) {
getWidget().icon.setAlternateText(getState().iconAltText);
}
}
@OnStateChange("clickShortcutKeyCode")
void setClickShortcut() {
getWidget().clickShortcut = getState().clickShortcutKeyCode;
}
@Override
public VButton getWidget() {
return (VButton) super.getWidget();
}
@Override
public ButtonState getState() {
return (ButtonState) super.getState();
}
@Override
public void onFocus(FocusEvent event) {
// EventHelper.updateFocusHandler ensures that this is called only when
// there is a listener on server side
getRpcProxy(FocusAndBlurServerRpc.class).focus();
}
@Override
public void onBlur(BlurEvent event) {
// EventHelper.updateFocusHandler ensures that this is called only when
// there is a listener on server side
getRpcProxy(FocusAndBlurServerRpc.class).blur();
}
@Override
public void onClick(ClickEvent event) {
if (getState().disableOnClick) {
// Simulate getting disabled from the server without waiting for the
// round trip. The server-side RPC handler takes care of updating
// the server-side state in a similar way to ensure subsequent
// changes are properly propagated. Changing state on client is not
// generally supported.
getState().enabled = false;
super.updateEnabledState(false);
getRpcProxy(ButtonServerRpc.class).disableOnClick();
}
// Add mouse details
MouseEventDetails details = MouseEventDetailsBuilder
.buildMouseEventDetails(event.getNativeEvent(), getWidget()
.getElement());
getRpcProxy(ButtonServerRpc.class).click(details);
}
}