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

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Here is the source code for com.google.mobile.trippy.web.client.widget.InfoWindowView.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.common.base.Preconditions;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.StyleInjector;
import com.google.gwt.dom.client.Style.Position;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.maps.client.HasMap;
import com.google.gwt.maps.client.base.HasLatLng;
import com.google.gwt.maps.client.base.HasPoint;
import com.google.gwt.maps.client.event.Event;
import com.google.gwt.maps.client.event.EventCallback;
import com.google.gwt.maps.client.overlay.OverlayView;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiTemplate;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;
import com.google.mobile.trippy.web.client.TrippyBundle;
import com.google.mobile.trippy.web.client.base.NullMap;

/**
 * View for map info window
 * 
 * 
 */
public class InfoWindowView extends OverlayView implements InfoWindowPresenter.Display {

    static {
        // Create an inject decorator-specific resources.
        TrippyBundle resources = GWT.create(TrippyBundle.class);
        StyleInjector.inject(resources.commonStyle().getText());
    }

    /** Style for this view. */
    public static interface ContentStyle extends CssResource {
        String contentPanel();

        String noWhiteSpce();
    }

    /** Ui Binder. */
    @UiTemplate("InfoWindowView.ui.xml")
    interface Binder extends UiBinder<Widget, InfoWindowView> {

    }

    @UiField
    ContentStyle style;
    private static Binder uiBinder = GWT.create(Binder.class);
    private final Label infoWindowContent;
    private final HasMap map;
    private HasLatLng position;

    public InfoWindowView(HasMap map) {

        uiBinder.createAndBindUi(this);
        this.map = map;

        infoWindowContent = new Label() {
            private HandlerRegistration clickHandler;

            @Override
            public HandlerRegistration addClickHandler(ClickHandler handler) {
                if (clickHandler != null) {
                    clickHandler.removeHandler();
                }
                clickHandler = super.addClickHandler(handler);
                return clickHandler;
            }
        };
        infoWindowContent.addStyleName(style.noWhiteSpce());
    }

    @Override
    public Widget asWidget() {
        return null;
    }

    @Override
    public void showPopup(final HasLatLng position) {
        Preconditions.checkNotNull(position);
        this.position = position;
        setMap(map);
    }

    @Override
    public void hidePopup() {
        setMap(new NullMap());
    }

    @Override
    public void setContent(String content) {
        infoWindowContent.setText(content);
    }

    @Override
    public String getContent() {
        return infoWindowContent.getText();
    }

    @Override
    public void draw() {

        HasPoint point = getProjection().fromLatLngToDivPixel(position);

        Style contentStyle = infoWindowContent.getElement().getStyle();
        contentStyle.setPosition(Position.ABSOLUTE);
        int mapWidth = getMap().getDiv().getClientWidth();

        int infoWidth = infoWindowContent.getOffsetWidth();
        int pos = (int) (point.getX() - (infoWidth / 2));
        int shift = infoWidth - (getMap().getDiv().getAbsoluteRight() - pos);
        //    if (shift > 0) {
        //      pos -= shift;
        //    }
        contentStyle.setLeft(pos, Unit.PX);
        contentStyle.setTop(point.getY() - 70, Unit.PX);
    }

    @Override
    public void onAdd() {
        getPanes().getFloatPane().appendChild(infoWindowContent.getElement());
        infoWindowContent.setVisible(true);
        Event.addDomListener(infoWindowContent.getElement(), "click", new EventCallback() {

            @Override
            public void callback() {
                Event.trigger(InfoWindowView.this, "click");
            }
        });
    }

    @Override
    public void onRemove() {
        //    infoWindowContent.removeFromParent();
        infoWindowContent.setVisible(false);

    }

    @Override
    public void setClickHandler(EventCallback callback) {
        Event.clearListeners(this, "click");
        Event.addListener(this, "click", callback);
    }
}