de.swm.commons.mobile.client.widgets.Button Maven / Gradle / Ivy
/*
* Copyright 2011 SWM Services GmbH.
*
* 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 de.swm.commons.mobile.client.widgets;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.HTML;
import de.swm.commons.mobile.client.SWMMobile;
import de.swm.commons.mobile.client.event.DragController;
import de.swm.commons.mobile.client.event.DragEvent;
import de.swm.commons.mobile.client.event.DragEventsHandler;
import de.swm.commons.mobile.client.event.FastClickHelper;
import de.swm.commons.mobile.client.utils.IsSWMMobileWidgetHelper;
import de.swm.commons.mobile.client.widgets.itf.IsSWMMobileWidget;
/**
* A button.
*/
public class Button extends HTML implements DragEventsHandler, IsSWMMobileWidget, HasTouchStartHandlers, HasClickHandlers {
private boolean isDisabled = false;
private final IsSWMMobileWidgetHelper myWidgetHelper = new IsSWMMobileWidgetHelper();
private HandlerRegistration touchStartHandler;
private HandlerRegistration touchEndHandler;
/**
* Default constructor.
*/
public Button() {
setStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().button());
}
/**
* Constructor.
*
* @param caption the caption.
* @param handler click handler.
*/
public Button(String caption, ClickHandler handler) {
setStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().button());
setHTML(caption);
this.addClickHandler(handler);
}
/**
* Alternative constructor.
*
* @param caption the caption
* @param handler the fast click handler.
* @deprecated not working in iOS
*/
@Deprecated
public Button(String caption, FastClickHelper.FastClickHandler handler) {
setStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().button());
setHTML(caption);
FastClickHelper.addClickHandler(this, handler);
}
/**
* Constructor.
*
* @param caption the caption.
*/
public Button(String caption) {
this();
setHTML(caption);
}
/**
* Sets the cation of the button
*
* @param caption the caption
*/
public void setCaption(String caption) {
setHTML(caption);
}
@Override
public void onLoad() {
super.onLoad();
DragController.get().addDragEventsHandler(this);
myWidgetHelper.checkInitialLoad(this);
//If the button was contructed with an Fast click Hanlder, no other hanlders will be added.
touchStartHandler = this.addTouchStartHandler(new TouchStartHandler() {
@Override
public void onTouchStart(TouchStartEvent event) {
if (!isDisabled) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
}
event.stopPropagation();
}
});
touchEndHandler = this.addTouchEndHandler(new TouchEndHandler() {
@Override
public void onTouchEnd(TouchEndEvent event) {
if (!isDisabled) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
}
event.stopPropagation();
}
});
}
@Override
public void onUnload() {
DragController.get().removeDragEventsHandler(this);
touchStartHandler.removeHandler();
touchEndHandler.removeHandler();
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
}
@Override
public void onDragStart(DragEvent e) {
if (!isDisabled) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
}
e.stopPropagation();
}
@Override
public void onDragMove(DragEvent e) {
if (!isDisabled) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
}
e.stopPropagation();
}
@Override
public void onDragEnd(DragEvent e) {
if (!isDisabled) {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().pressed());
} else {
DragController.get().suppressNextClick();
}
e.stopPropagation();
}
/**
* Disables/Enables the button.
*
* @param disabled true if disabled
*/
public void setDisabled(boolean disabled) {
isDisabled = disabled;
if (disabled) {
addStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().disabled());
} else {
removeStyleName(SWMMobile.getTheme().getMGWTCssBundle().getButtonCss().disabled());
}
}
public boolean isDisabled() {
return isDisabled;
}
@Override
public void onInitialLoad() {
}
@Override
public void onTransitionEnd() {
}
@Override
public void setSecondaryStyle(String style) {
myWidgetHelper.setSecondaryStyle(this, style);
}
}