/*
 * Isomorphic SmartGWT web presentation layer
 * Copyright 2016 and beyond Isomorphic Software, Inc.
 *
 * OWNERSHIP NOTICE
 * Isomorphic Software owns and reserves all rights not expressly granted in this source code,
 * including all intellectual property rights to the structure, sequence, and format of this code
 * and to all designs, interfaces, algorithms, schema, protocols, and inventions expressed herein.
 *
 *  If you have any questions, please email <sourcecode@isomorphic.com>.
 *
 *  This entire comment must accompany any portion of Isomorphic Software source code that is
 *  copied or moved from this file.
 */
package com.smartgwt.sample.showcase.client.chart;

import java.util.Map;
import java.util.HashMap;
import java.util.LinkedHashMap;

import com.smartgwt.client.data.Criteria;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.types.ChartType;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.FormItem;
import com.smartgwt.client.widgets.form.fields.SelectItem;
import com.smartgwt.client.widgets.form.fields.events.ChangedEvent;
import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;
import com.smartgwt.client.widgets.chart.FacetChart;
import com.smartgwt.client.widgets.chart.ColorMapper;
import com.smartgwt.client.widgets.cube.Facet;
import com.smartgwt.client.widgets.cube.FacetValue;
import com.smartgwt.client.widgets.layout.VLayout;

import com.google.gwt.core.client.EntryPoint;

public class HistogramChart implements EntryPoint {

public FacetChart  chart;
    public DynamicForm configForm;

private DynamicForm getConfigForm() {
        final SelectItem zOrderItem = new SelectItem("zOrder", "Z-Ordering");
        zOrderItem.setWrapTitle(false);
        zOrderItem.setAllowEmptyValue(true);
        zOrderItem.setEmptyDisplayValue("Draw order (default)");
        zOrderItem.setValueMap(new LinkedHashMap<String, String>() {{
            put("danger", "Use 'danger' Metric");
        }});
        zOrderItem.addChangedHandler(new ChangedHandler() {
            public void onChanged(ChangedEvent event) {
                chart.setZIndexMetric((String)event.getValue());
            }
        });

final SelectItem borderColorItem = new SelectItem("borderColor", "Border Color");
        borderColorItem.setWrapTitle(false);
        borderColorItem.setValueMap(new String[]{"Grey", "Orange", "Cyan"});
        borderColorItem.setDefaultToFirstOption(true);
        borderColorItem.setVisible(!chart.getMatchBarChartDataLineColor());
        borderColorItem.addChangedHandler(new ChangedHandler() {
            public void onChanged(ChangedEvent event) {
                chart.setData(chart.getDataAsRecordList());
            }
        });

configForm = new DynamicForm();
        configForm.setNumCols(4);
        configForm.setWidth(500);
        configForm.setItems(zOrderItem, borderColorItem);

return configForm;
    }

private Map<String, String> lineColors = new HashMap<String, String>() {{
        put("Grey", "#333333"); put("Orange", "#FF8C00"); put("Cyan", "#00FFFF");
    }};
    private Map<String, String> dataColors = new HashMap<String, String>() {{
        put("Metals", "#DC143C"); put("Organics", "#7FFF00");  put("Pathogens", "#0000FF");
    }};

@Override
    public void onModuleLoad() {
        chart = new FacetChart();
        chart.setID("histogram");
        chart.setTitle("Measured Pollutant Levels");

chart.setShowValueOnHover(true);
        chart.setChartType(ChartType.HISTOGRAM);
        chart.setAllowedChartTypes(new ChartType[] {ChartType.BAR, ChartType.COLUMN, 
                                                    ChartType.HISTOGRAM});
        chart.setValueProperty("minValue");
        chart.setEndValueMetric("maxValue");

Facet metricFacet = new Facet("valueMetrics");
        metricFacet.setInlinedValues(true);
        metricFacet.setValues(new FacetValue("minValue"), 
                              new FacetValue("maxValue"), new FacetValue("danger"));

chart.setFacets(new Facet("water", "Water Source"),
                        new Facet("pollutant", "Pollutant"), metricFacet);
        chart.setMetricFacetId("valueMetrics");
        chart.setData(HistogramChartData.getData());

// override the default chart segment colors

chart.setDataLineColorMapper(new ColorMapper() {
            @Override
            public String getColor(int index, Object facetValueId, String purpose) {
                FormItem item = configForm.getItem("borderColor");
                return (String) lineColors.get(item.getValue());
            }
        });
        chart.setDataColorMapper(new ColorMapper() {
            @Override
            public String getColor(int index, Object facetValueId, String purpose) {
                return (String) dataColors.get(facetValueId);
            }
        });

VLayout layout = new VLayout();
        layout.setWidth100();
        layout.setHeight100();
        layout.setMembers(getConfigForm(), chart);

layout.draw();
    }

}