DataLabels.cs

#region Copyright Syncfusion Inc. 2001-2021.
// Copyright Syncfusion Inc. 2001-2021. All rights reserved.
// Use of this code is subject to the terms of our license.
// A copy of the current license can be obtained at any time by e-mailing
// licensing@syncfusion.com. Any infringement will be prosecuted under
// applicable laws. 
#endregion
using System;
using Com.Syncfusion.Maps;
using Org.Json;
using System.Collections.Generic;
using Android.Graphics;
using Android.Widget;
using Android.OS;
using Com.Syncfusion.Sfbusyindicator;
using Com.Syncfusion.Sfbusyindicator.Enums;
using Android.Views;

namespace SampleBrowser
{
    public class DataLabels : SamplePage
    {
        SfMaps maps;
        Handler handler;
        List<String> adapter;
        List<String> smartLabelAdapter;
        ShapeFileLayer layer;

        public override Android.Views.View GetSampleContent(Android.Content.Context context)
        {
            handler = new Handler();
            LinearLayout layout = new LinearLayout(context);
     
            layout.Orientation = Orientation.Vertical;

            maps = new SfMaps(context);
            layer = new ShapeFileLayer();
            layer.Uri = "usa_state.shp";
            layer.ShowItems = true;
            layer.EnableSelection = false;
            layer.ShapeIdTableField = "STATE_NAME";
            layer.ShapeIdPath = "Name";
            layer.ShapeSettings.ShapeFill = Color.ParseColor("#A9D9F7");
            layer.ShapeSettings.ShapeValuePath = "Name";
            layer.ShapeSettings.ShapeColorValuePath = "Type";

            layer.DataSource = GetDataSource();

            SetColorMapping(layer.ShapeSettings);

            layer.DataLabelSettings.IntersectionAction = IntersectAction.None;
            layer.DataLabelSettings.SmartLabelMode = IntersectAction.Trim;

            layer.TooltipSettings.ShowTooltip = true;
            layer.TooltipSettings.ValuePath = "Name";

            maps.Layers.Add(layer);

            SfBusyIndicator sfBusyIndicator = new SfBusyIndicator(context);
            sfBusyIndicator.IsBusy = true;
            sfBusyIndicator.AnimationType = AnimationTypes.SlicedCircle;
            sfBusyIndicator.ViewBoxWidth = 50;
            sfBusyIndicator.ViewBoxHeight = 50;
            sfBusyIndicator.TextColor = Color.ParseColor("#779772");

            layout.AddView(sfBusyIndicator);
            Java.Lang.Runnable run = new Java.Lang.Runnable(() =>
            {
                layout.RemoveView(sfBusyIndicator);
                layout.AddView(maps);

            });

            handler.PostDelayed(run, 100);

            return layout;
        }

        JSONArray GetDataSource()
        {
            JSONArray array = new JSONArray();

            array.Put(getJsonObject("Alabama", "Vegetables", 9));
            array.Put(getJsonObject("Alaska", "Vegetables", 3));
            array.Put(getJsonObject("Arizona", "Rice", 11));
            array.Put(getJsonObject("Arkansas", "Vegetables", 6));
            array.Put(getJsonObject("California", "Rice", 55));
            array.Put(getJsonObject("Colorado", "Rice", 9));
            array.Put(getJsonObject("Connecticut", "Grains", 7));
            array.Put(getJsonObject("Delaware", "Grains", 3));
            array.Put(getJsonObject("District of Columbia", "Grains", 3));
            array.Put(getJsonObject("Florida", "Rice", 29));
            array.Put(getJsonObject("Georgia", "Rice", 16));
            array.Put(getJsonObject("Hawaii", "Grains", 4));
            array.Put(getJsonObject("Idaho", "Grains", 4));
            array.Put(getJsonObject("Illinois", "Vegetables", 20));
            array.Put(getJsonObject("Indiana", "Grains", 11));
            array.Put(getJsonObject("Iowa", "Vegetables", 6));
            array.Put(getJsonObject("Kansas", "Rice", 6));
            array.Put(getJsonObject("Kentucky", "Grains", 8));
            array.Put(getJsonObject("Louisiana", "Rice", 8));
            array.Put(getJsonObject("Maine", "Grains", 4));
            array.Put(getJsonObject("Maryland", "Grains", 10));
            array.Put(getJsonObject("Massachusetts", "Grains", 11));
            array.Put(getJsonObject("Michigan", "Grains", 16));
            array.Put(getJsonObject("Minnesota", "Wheat", 10));
            array.Put(getJsonObject("Mississippi", "Vegetables", 6));
            array.Put(getJsonObject("Missouri", "Vegetables", 10));
            array.Put(getJsonObject("Montana", "Grains", 3));
            array.Put(getJsonObject("Nebraska", "Rice", 5));
            array.Put(getJsonObject("Nevada", "Wheat", 6));
            array.Put(getJsonObject("New Hampshire", "Grains", 4));
            array.Put(getJsonObject("New Jersey", "Vegetables", 14));
            array.Put(getJsonObject("New Mexico", "Rice", 5));
            array.Put(getJsonObject("New York", "Vegetables", 29));
            array.Put(getJsonObject("North Carolina", "Rice", 15));
            array.Put(getJsonObject("North Dakota", "Grains", 3));
            array.Put(getJsonObject("Ohio", "Vegetables", 18));
            array.Put(getJsonObject("Oklahoma", "Rice", 7));
            array.Put(getJsonObject("Oregon", "Wheat", 7));
            array.Put(getJsonObject("Pennsylvania", "Vegetables", 20));
            array.Put(getJsonObject("Rhode Island", "Grains", 4));
            array.Put(getJsonObject("South Carolina", "Rice", 9));
            array.Put(getJsonObject("South Dakota", "Grains", 3));
            array.Put(getJsonObject("Tennessee", "Vegetables", 11));
            array.Put(getJsonObject("Texas", "Vegetables", 38));
            array.Put(getJsonObject("Utah", "Rice", 6));
            array.Put(getJsonObject("Vermont", "Grains", 3));
            array.Put(getJsonObject("Virginia", "Rice", 13));
            array.Put(getJsonObject("Washington", "Vegetables", 12));
            array.Put(getJsonObject("West Virginia", "Grains", 5));
            array.Put(getJsonObject("Wisconsin", "Grains", 10));
            array.Put(getJsonObject("Wyoming", "Wheat", 3));
            return array;
        }

        JSONObject getJsonObject(String name, String type, double count)
        {
            JSONObject obj = new JSONObject();
            obj.Put("Name", name);
            obj.Put("Type", type);
            return obj;
        }

        void SetColorMapping(ShapeSetting setting)
        {
            List<ColorMapping> colorMappings = new List<ColorMapping>();

            EqualColorMapping colorMapping2 = new EqualColorMapping();
            colorMapping2.Value = "Rice";
            colorMapping2.Color = Color.ParseColor("#b5e485");
            colorMappings.Add(colorMapping2);

            EqualColorMapping colorMapping3 = new EqualColorMapping();
            colorMapping3.Value = "Wheat";
            colorMapping3.Color = Color.ParseColor("#9178e3");
            colorMappings.Add(colorMapping3);

            EqualColorMapping colorMapping4 = new EqualColorMapping();
            colorMapping4.Value = "Grains";
            colorMapping4.Color = Color.ParseColor("#e4c16c");
            colorMappings.Add(colorMapping4);

            EqualColorMapping colorMapping1 = new EqualColorMapping();
            colorMapping1.Value = "Vegetables";
            colorMapping1.Color = Color.ParseColor("#ec9b79");
            colorMappings.Add(colorMapping1);

            EqualColorMapping colorMapping5 = new EqualColorMapping();
            colorMapping5.Value = "Oats";
            colorMapping5.Color = Color.ParseColor("#df819c");
            colorMappings.Add(colorMapping5);

            setting.ColorMapping = colorMappings;
        }

        public override View GetPropertyWindowLayout(Android.Content.Context context)
        {
            TextView smartLabel = new TextView(context);
            smartLabel.Text = "SmartLabel";
            smartLabel.Typeface = Typeface.DefaultBold;
            smartLabel.SetTextColor(Color.ParseColor("#262626"));
            smartLabel.TextSize = 20;

            Spinner smartLabelMode = new Spinner(context, SpinnerMode.Dialog);
            smartLabelAdapter = new List<String>() { "Trim", "None", "Hide" };

            ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>
                (context, Android.Resource.Layout.SimpleSpinnerItem, smartLabelAdapter);
            dataAdapter.SetDropDownViewResource(Android.Resource.Layout.SimpleDropDownItem1Line);
            smartLabelMode.Adapter = dataAdapter;

            smartLabelMode.ItemSelected += SmartLabelMode_ItemSelected;

            TextView intersection = new TextView(context);
            intersection.Text = "IntersectAction";
            intersection.Typeface = Typeface.DefaultBold;
            intersection.SetTextColor(Color.ParseColor("#262626"));
            intersection.TextSize = 20;

            Spinner intersectionAction = new Spinner(context, SpinnerMode.Dialog);
            adapter = new List<String>() { "None", "Trim", "Hide" };

            ArrayAdapter<String> dataAdapter1 = new ArrayAdapter<String>
                (context, Android.Resource.Layout.SimpleSpinnerItem, adapter);
            dataAdapter1.SetDropDownViewResource(Android.Resource.Layout.SimpleDropDownItem1Line);
            intersectionAction.Adapter = dataAdapter1;

            intersectionAction.ItemSelected += IntersectionAction_ItemSelected;

            LinearLayout optionsPage = new LinearLayout(context);

            optionsPage.Orientation = Orientation.Vertical;
            optionsPage.AddView(smartLabel);
            optionsPage.AddView(smartLabelMode);

            optionsPage.AddView(intersection);
            optionsPage.AddView(intersectionAction);

            optionsPage.SetPadding(10, 10, 10, 10);
            optionsPage.SetBackgroundColor(Color.White);

            return optionsPage;
        }

        private void SmartLabelMode_ItemSelected(object sender, AdapterView.ItemSelectedEventArgs e)
        {
            String selectedItem = smartLabelAdapter[e.Position];
            if (selectedItem.Equals("Trim"))
            {
                layer.DataLabelSettings.SmartLabelMode = IntersectAction.Trim;
            }
            else if (selectedItem.Equals("None"))
            {
                layer.DataLabelSettings.SmartLabelMode = IntersectAction.None;
            }
            else if (selectedItem.Equals("Hide"))
            {
                layer.DataLabelSettings.SmartLabelMode = IntersectAction.Hide;
            }
        }

        private void IntersectionAction_ItemSelected(object sender, AdapterView.ItemSelectedEventArgs e)
        {
            String selectedItem = adapter[e.Position];
            if (selectedItem.Equals("None"))
            {
                layer.DataLabelSettings.IntersectionAction = IntersectAction.None;
            }
            else if (selectedItem.Equals("Trim"))
            {
                layer.DataLabelSettings.IntersectionAction = IntersectAction.Trim;
            }
            else if (selectedItem.Equals("Hide"))
            {
                layer.DataLabelSettings.IntersectionAction = IntersectAction.Hide;
            }
        }
    }
}