com.google.mobile.trippy.web.client.widget.DefaultToast.java Source code

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Here is the source code for com.google.mobile.trippy.web.client.widget.DefaultToast.java

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/*
 * Copyright 2010 Google Inc.
 *
 * 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.google.mobile.trippy.web.client.widget;

import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.PopupPanel.PositionCallback;
import com.google.mobile.trippy.web.client.view.ToastStyleCss;

/**
 * Default implementation for toast
 * 
 * 
 */
public class DefaultToast implements Toast {

    private Label toastLabel;
    private Label loadingLabel;

    private PopupPanel toastPanel;
    private PopupPanel loadingPanel;

    private Timer toastTimer;
    final ToastStyleCss toastStyle;

    private static final int DEFAULT_STATUS_TIME_MILLIS = 5000;

    public DefaultToast() {
        toastStyle = new ToastStyleCss();
        initializeToast();
        initializeLoading();
    }

    public void showToast(String message, int timeInMillis) {
        toastLabel.setText(message);
        toastPanel.setAutoHideEnabled(false);
        toastTimer.schedule(timeInMillis);
        toastPanel.center();
    }

    public void showToast(String message) {
        showToast(message, DEFAULT_STATUS_TIME_MILLIS);
    }

    public void showLoading(String message) {
        loadingLabel.setText(message);
        loadingPanel.setPopupPositionAndShow(new PositionCallback() {

            @Override
            public void setPosition(int offsetWidth, int offsetHeight) {
                int left = (Window.getClientWidth() - loadingPanel.getOffsetWidth()) >> 1;
                int top = 2;
                loadingPanel.setPopupPosition(Math.max(Window.getScrollLeft() + left, 0),
                        Window.getScrollTop() + top);
            }
        });
    }

    public void hideLoading() {
        loadingPanel.hide();
    }

    private void initializeLoading() {
        loadingLabel = new Label();
        loadingLabel.setStyleName(toastStyle.style.base());
        loadingPanel = new PopupPanel();
        loadingPanel.add(loadingLabel);
        loadingPanel.setStyleName(toastStyle.style.popUpBase());
    }

    private void initializeToast() {
        toastLabel = new Label();
        toastLabel.setStyleName(toastStyle.style.base());
        toastPanel = new PopupPanel();
        toastPanel.add(toastLabel);

        toastTimer = new Timer() {
            @Override
            public void run() {
                if (toastPanel.isShowing()) {
                    toastPanel.hide();
                }
            }
        };
        toastPanel.setStyleName(toastStyle.style.popUpBase());
    }

    @Override
    public void hideToast() {
        toastPanel.hide();
        toastTimer.cancel();
    }
}