package org.activityinfo.ui.client.component.report.editor.map.layerOptions;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import com.extjs.gxt.ui.client.event.ColorPaletteEvent;
import com.extjs.gxt.ui.client.event.Events;
import com.extjs.gxt.ui.client.event.Listener;
import com.extjs.gxt.ui.client.widget.ColorPalette;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.form.LabelField;
import com.google.common.base.Objects;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import org.activityinfo.i18n.shared.I18N;
import org.activityinfo.legacy.shared.reports.model.layers.PolygonMapLayer;

public class PolygonLayerOptions extends LayoutContainer implements LayerOptionsWidget<PolygonMapLayer> {
    private PolygonMapLayer layer;
    private ColorPalette colorPicker = new ColorPalette();

    public PolygonLayerOptions() {
        super();
        setStyleAttribute("padding", "5px");
        createColorPicker();
    }

    private void createColorPicker() {
        colorPicker.setValue("000000");

        // Set the selected color to the maplayer
        colorPicker.addListener(Events.Select, new Listener<ColorPaletteEvent>() {
            @Override
            public void handleEvent(ColorPaletteEvent be) {
                if (!Objects.equal(layer.getMaxColor(), colorPicker.getValue())) {
                    layer.setMaxColor(colorPicker.getValue());
                    ValueChangeEvent.fire(PolygonLayerOptions.this, layer);
                }
            }
        });

        LabelField labelColor = new LabelField(I18N.CONSTANTS.color());
        add(labelColor);
        add(colorPicker);
    }

    @Override
    public PolygonMapLayer getValue() {
        return layer;
    }

    private void updateUI() {
        colorPicker.setValue(layer.getMaxColor());
    }

    // TODO: fireevent
    @Override
    public void setValue(PolygonMapLayer value, boolean fireEvents) {
        setValue(value);
    }

    @Override
    public void setValue(PolygonMapLayer value) {
        this.layer = value;
        updateUI();
    }

    @Override
    public HandlerRegistration addValueChangeHandler(ValueChangeHandler<PolygonMapLayer> handler) {
        return this.addHandler(handler, ValueChangeEvent.getType());
    }
}