com.gwtmobile.ui.client.widgets.Button.java Source code

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Here is the source code for com.gwtmobile.ui.client.widgets.Button.java

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/*
 * Copyright (c) 2010 Zhihua (Dennis) Jiang
 *
 * 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.gwtmobile.ui.client.widgets;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.gwtmobile.ui.client.CSS.StyleNames;
import com.gwtmobile.ui.client.event.DragController;
import com.gwtmobile.ui.client.event.DragEvent;
import com.gwtmobile.ui.client.event.DragEventsHandler;

/**
 *  kevindeem:  Modified this class to use the GWT button as a base because of
 *  issue with android 5.0.1 where it doesn't wanna work with click events.
 *
 */
public class Button extends com.google.gwt.user.client.ui.Button implements DragEventsHandler, IsGwtMobileWidget {

    private boolean _isDisabled = false;
    private IsGwtMobileWidgetHelper _widgetHelper = new IsGwtMobileWidgetHelper();
    List<ClickHandler> _handlers = new ArrayList<ClickHandler>();
    long _lastClick = 0;

    public class ButtonHandlerRegistration implements HandlerRegistration {
        ClickHandler handler;

        public ButtonHandlerRegistration(ClickHandler handler) {
            this.handler = handler;
            _handlers.add(handler);
        }

        @Override
        public void removeHandler() {
            if (_handlers.contains(handler)) {
                _handlers.remove(handler);
            }
        }
    }

    public Button() {
        setStyleName(StyleNames.Primary.Button);
        super.addClickHandler(new ClickHandler() {

            @Override
            public void onClick(ClickEvent event) {
                long now = System.currentTimeMillis();
                if (now - _lastClick > 300) {
                    for (ClickHandler h : _handlers) {
                        h.onClick(event);
                    }
                    _lastClick = now;
                }
            }
        });
    }

    public Button(String caption, ClickHandler handler) {
        this();
        setText(caption);
        this.addClickHandler(handler);
    }

    @Override
    public HandlerRegistration addClickHandler(ClickHandler handler) {
        return new ButtonHandlerRegistration(handler);
    }

    @Override
    public void onLoad() {
        super.onLoad();
        //DragController.get().addDragEventsHandler(this);
        _widgetHelper.CheckInitialLoad(this);
    }

    @Override
    public void onUnload() {
        //DragController.get().removeDragEventsHandler(this);
    }

    @Override
    public void onDragStart(DragEvent e) {
        if (!_isDisabled) {
            addStyleName(StyleNames.Secondary.Pressed);
        }
        e.stopPropagation();
    }

    @Override
    public void onDragMove(DragEvent e) {
        if (!_isDisabled) {
            removeStyleName(StyleNames.Secondary.Pressed);
        }
        e.stopPropagation();
    }

    @Override
    public void onDragEnd(DragEvent e) {
        if (!_isDisabled) {
            removeStyleName(StyleNames.Secondary.Pressed);
        } else {
            DragController.get().suppressNextClick();
        }
        e.stopPropagation();
    }

    public void setDisabled(boolean disabled) {
        _isDisabled = disabled;
        if (disabled) {
            addStyleName(StyleNames.Secondary.Disabled);
        } else {
            removeStyleName(StyleNames.Secondary.Disabled);
        }
    }

    public boolean isDisabled() {
        return _isDisabled;
    }

    @Override
    public void onInitialLoad() {
    }

    @Override
    public void setSecondaryStyle(String style) {
        _widgetHelper.setSecondaryStyle(this, style);
    }
}