google_maps - SOLoist Wiki

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====== Interactive Maps ======

**Interactive Maps** is a [[SOLoist Sample Applications|SOLoist sample application]] that fully embeds [[http://maps.google.com/ | Google Maps]] that interact with the enclosing application by exhanging geo-coordinates. This example demonstrates how complex external components can be integrated with SOLoist code in order to interchange the data and keep them in sync. 

The user can browse the map. By selecting an object of //House// in the suggest box, the map view will be positioned on the location based on the coordinates stored in the object's //coordinates// attribute. 

When the marker is unlocked by unchecking the checkbox, and a different location is selected in the map, all the data from Google Maps will be automatically saved to the selected object's attributes. 

The user can also type in an address in the text input field, when Google Maps provides the coordinates.

This way, the geo-coordinates from Google Maps and the values of attributes from SOLoist objects are kept in sync. 

==== Live example ====

[[http://soloistdemo.org/SampleApplications/gmaps.html]]\\
[[http://soloistdemo.org/SampleApplications/oql?q=SELECT+h%2C+h.code%2C+h.address%2C+h.city%2C+h.country%2C+h.coordinates%0D%0AFROM+House+h&f=html | OQL Query: Houses]]
|{{screen:googlemaps.png?300}}|

===== UML Model =====
{{googlemaps.png}}

===== Business Logic Code =====
None.

===== GUI Code =====
<code java>
package rs.sol.sampleapps.gmaps;

import rs.sol.sampleapps.House;
import rs.sol.soloist.server.builtindomains.builtindatatypes.Text;
import rs.sol.soloist.server.guiconfiguration.components.GUIHTMLComponent;
import rs.sol.soloist.server.guiconfiguration.components.GUILabelComponent;
import rs.sol.soloist.server.guiconfiguration.components.GUIPanelComponent;
import rs.sol.soloist.server.guiconfiguration.construction.GUIComponentBinding;
import rs.sol.soloist.server.guiconfiguration.elementcomponents.GUICollectionInput;
import rs.sol.soloist.server.guiconfiguration.elementcomponents.GUIElementComponent;
import rs.sol.soloist.server.guiconfiguration.elementcomponents.GUISuggestWidget;
import rs.sol.soloist.server.guiconfiguration.layout.TableLayoutData;
import rs.sol.soloist.server.guiconfiguration.nonvisualcompoments.GUIFindAllInstancesSAPComponent;
import rs.sol.soloist.server.uml.concepts.runtime.ISlot;

public class GoogleMapsFragment {

	private ISlot<Text> house;
	private GUIPanelComponent rootPanel;

	public GoogleMapsFragment(GUIPanelComponent rootPanel) {
			this.rootPanel = rootPanel;
			this.house = rootPanel.input;
			init();
	}

	private void init() {
		houseLocationDetails();
		
		GUIElementComponent coordinates = GUIElementComponent.createSlotEditor(rootPanel, House.PROPERTIES.coordinates, house);
		coordinates.styleName.set(Text.fromString("#coordinatesH"));
		GUIHTMLComponent.create(rootPanel, "<div id=\"map_canvasH\"></div>");

		GUIHTMLComponent html1 = GUIHTMLComponent.create(rootPanel, "");
		html1.styleName.set(Text.fromString("#tab1886H"));
		
		GUIComponentBinding.create(house, html1.html);
	}

	private void houseLocationDetails() {
		GUIPanelComponent table = GUIPanelComponent.createTable(rootPanel);
		table.styleName.set(Text.fromString("form"));
		
		int row = 0, col = 0;
		GUILabelComponent.create(table, "House", row, col++).styleName.set(Text.fromString("formLabel"));
		GUILabelComponent.create(table, "Address", row, col++).styleName.set(Text.fromString("formLabel"));
		GUILabelComponent.create(table, "City", row, col++).styleName.set(Text.fromString("formLabel"));
		GUILabelComponent.create(table, "Country", row, col++).styleName.set(Text.fromString("formLabel"));
		
		GUIFindAllInstancesSAPComponent allHouses = GUIFindAllInstancesSAPComponent.create(rootPanel, House.FQ_TYPE_NAME);
		GUIElementComponent suggestBox = GUIElementComponent.createInput(table, new GUISuggestWidget(), new GUICollectionInput());
		GUIComponentBinding.create(allHouses.value, GUICollectionInput.get(suggestBox).collection);
		
		GUIElementComponent seAddress = GUIElementComponent.createSlotEditor(table, House.PROPERTIES.address, house);
		seAddress.styleName.set(Text.fromString("#addressH"));
		GUIElementComponent seCity = GUIElementComponent.createSlotEditor(table, House.PROPERTIES.city, house);
		seCity.styleName.set(Text.fromString("#cityH"));
		GUIElementComponent seCountry = GUIElementComponent.createSlotEditor(table, House.PROPERTIES.country, house);
		seCountry.styleName.set(Text.fromString("#countryH"));
		
		row++; col = 0;
		TableLayoutData.setRowColumn(suggestBox, row, col++);
		TableLayoutData.setRowColumn(seAddress, row, col++);
		TableLayoutData.setRowColumn(seCity, row, col++);
		TableLayoutData.setRowColumn(seCountry, row, col++);
		
		GUIComponentBinding.create(suggestBox.value, rootPanel.input);
	}
	
}
</code>

<code java>
package rs.sol.sampleapps.gmaps;

import rs.sol.sampleapps.House;
import rs.sol.soloist.helpers.init.DefaultContextInit;
import rs.sol.soloist.helpers.init.Initializer;
import rs.sol.soloist.helpers.init.InitializerFailedException;
import rs.sol.soloist.server.builtindomains.builtindatatypes.Text;
import rs.sol.soloist.server.guiconfiguration.components.GUIApplicationComponent;
import rs.sol.soloist.server.guiconfiguration.components.GUILabelComponent;
import rs.sol.soloist.server.guiconfiguration.components.GUIPanelComponent;
import rs.sol.soloist.server.guiconfiguration.style.GUIContext;
import rs.sol.soloist.server.guiconfiguration.style.GUIObjectSetting;
import rs.sol.soloist.server.guiconfiguration.style.GUITextFeature;
import rs.sol.soloist.server.server.SoloistServiceServlet;

public enum GMaps implements Initializer {

	INSTANCE;

	@Override
	public void init() throws InitializerFailedException {
		GUIApplicationComponent application = new GUIApplicationComponent();
		application.name.set(Text.fromString("GMapsSample"));
		SoloistServiceServlet.registerApplication(application);
		application.context.set(createContextAndStyles());
		
		GUIPanelComponent root = GUIPanelComponent.createFlow(application);
		
		GUILabelComponent title = GUILabelComponent.create(root, "Google Maps");
		title.styleName.set(Text.fromString("titleStyle"));
		
		GUIPanelComponent topPanel = GUIPanelComponent.createFlow(root);
		topPanel.styleName.set(Text.fromString("topPanel"));

		new GoogleMapsFragment(topPanel);
    }
	
	private GUIContext createContextAndStyles() {
		GUIContext context = new GUIContext();
		context.supercontext.set(DefaultContextInit.getRoot());

		GUIObjectSetting person = GUIObjectSetting.create(context, House.CLASSIFIER);
		GUITextFeature.createName(person, House.PROPERTIES.code);

		return context;
	}

}
</code>

<code javascript extension.js>
/**
 * Javascript that controls behavior of external components.
 */

var mapH, markerH, positionH;
var geocoder;
var timeout = 100;
var lock = true;
var first = true;

var solHQ = new google.maps.LatLng(44.813209013839284, 20.464512819311494);
var lockText = 'Lock marker';
var coorText = 'Coordinates';
var buttonText = 'Geocode';

function initialize() {

	geocoder = new google.maps.Geocoder();
	markerH = new google.maps.Marker();

	var myOptions = {
		zoom : 14,
		center : solHQ,
		scaleControl : true,
		mapTypeId : google.maps.MapTypeId.ROADMAP
	};

	var canvasId = "map_canvasH";
	var coorId = "coordinatesH";

	mapH = new google.maps.Map(document.getElementById(canvasId), myOptions);
	positionH = coordinatesControl(mapH);

	geocode(mapH);
	lockMarkerControl(mapH);

	google.maps.event.addListener(mapH, 'click', function(event) {
		if (!lock) {
			var coor = document.getElementById(coorId);
			markerH.setPosition(event.latLng);
			markerH.setMap(mapH);
			coor.value = event.latLng;
			positionH.innerHTML = parseLatLng(event.latLng);
			var address = document.getElementById("addressH");
			var city = document.getElementById("cityH");
			var country = document.getElementById("countryH");
			codeLatLng(event.latLng, address, city, country);
			coor.focus();
			coor.blur();
		}
	});

	drawMap();

}

function codeLatLng(latlng, address, city, country) {
	geocoder.geocode({
		'latLng' : latlng
	}, function(results, status) {
		if (status == google.maps.GeocoderStatus.OK) {
			if (results[0]) {
				var ac = results[0].address_components;
				var str = "", num = "", cty = "", cnt = "";
				for ( var i in ac) {
					if (ac[i].types[0] == "street_number")
						num = ac[i].long_name;
					if (ac[i].types[0] == "street_address" || ac[i].types[0] == "route" || ac[i].types[0] == "intersection")
						str = ac[i].long_name;
					if (ac[i].types[0] == "locality")
						cty = ac[i].long_name;
					if (ac[i].types[0] == "country")
						cnt = ac[i].long_name;
				}
				address.value = str + " " + num;
				city.value = cty;
				country.value = cnt;
				address.focus();
				address.blur();
				city.focus();
				city.blur();
				country.focus();
				country.blur();
			}
		} else {
			alert("Geocoder failed due to: " + status);
		}
	});
}

function codeAddress(address, coor) {
	geocoder.geocode({
		'address' : address
	}, function(results, status) {
		if (status == google.maps.GeocoderStatus.OK) {
			coor.value = results[0].geometry.location;
			coor.focus();
			coor.blur();
			drawMap();
		}
	});
}

function parseLatLng(latLng) {
	if (latLng === "")
		return coorText + " ( - )";

	var dec = 1000000;
	var ll = new Array();
	ll = latLng.toString().substring(1, latLng.toString().length - 1).split(', ');
	return coorText + " (" + (Math.round(parseFloat(ll[0]) * dec) / dec) + ", "
			+ (Math.round(parseFloat(ll[1]) * dec) / dec) + ")";
}

function coordinatesControl(map) {
	var controlDiv = document.createElement('DIV');
	controlDiv.id = 'mapsCoor';
	map.controls[google.maps.ControlPosition.RIGHT_BOTTOM].push(controlDiv);
	return controlDiv;
}

function geocode(map) {
	var button = document.createElement('button');
	button.id = 'geocodeButton';
	button.innerHTML = buttonText;

	map.controls[google.maps.ControlPosition.TOP_RIGHT].push(button);

	var address = document.getElementById("addressH");
	var city = document.getElementById("cityH");
	var country = document.getElementById("countryH");

	google.maps.event.addDomListener(button, 'click', function() {
		var fullAddress = address.value + ' ' + city.value + ' ' + country.value;
		var coor = document.getElementById("coordinatesH");
		codeAddress(fullAddress, coor);
	});
}

function lockMarkerControl(map) {
	var controlDiv = document.createElement('DIV');
	controlDiv.id = 'mapsCheckbox';
	var cb = document.createElement('input');
	cb.type = 'checkbox';
	cb.checked = lock;
	controlDiv.innerHTML = '<div id=\'text\'>' + lockText + '</div>';
	controlDiv.appendChild(cb);

	map.controls[google.maps.ControlPosition.TOP_RIGHT].push(controlDiv);

	google.maps.event.addDomListener(cb, 'click', function() {
		lock = cb.checked;
	});
}

function drawMap() {

	var coor = document.getElementById("coordinatesH");
	if (coor != null && coor.value !== "") {
		var latLng = new Array();
		latLng = coor.value.substring(1, coor.value.length - 1).split(', ');
		position = new google.maps.LatLng(latLng[0], latLng[1]);
		markerH.setMap(mapH);
		markerH.setPosition(position);
		mapH.setCenter(position);
		positionH.innerHTML = parseLatLng(position);
	} else {
		mapH.setCenter(solHQ);
		markerH.setMap(null);
		positionH.innerHTML = parseLatLng("");
	}
}

function htmlComponentChanged(id) {

	if (id == "tab1886H") {
		if (first) {
			setTimeout(function() {
				initialize();
			}, timeout);
			first = false;
		} else {
			setTimeout(function() {
				drawMap();
			}, timeout);
		}
	}
}
</code>
Trace: • oql • soloistconfiguration • google_maps • search • menus • customui • gallery
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