//----------------------------------------------------------------------
// Riscrivo la classe per la gestione dell'evento click in modo che apra una finestra in popup 
// con il risultato della GetFeatureInfo



OpenLayers.Control.Click = OpenLayers.Class(OpenLayers.Control, {                
    defaultHandlerOptions: {
        'single': true,
        'double': false,
        'pixelTolerance': 0,
        'stopSingle': false,
        'stopDouble': false
    },

    initialize: function(options) {
        this.handlerOptions = OpenLayers.Util.extend(
            {}, this.defaultHandlerOptions
        );
        OpenLayers.Control.prototype.initialize.apply(
            this, arguments
        ); 
        this.handler = new OpenLayers.Handler.Click(
            this, {
                'click': this.trigger
            }, this.handlerOptions
        );
    }, 

// funzione che viene eseguita all'evento click
    trigger: function(e) {
		callMouseUp(e);
	}  
});

function callMouseUp(e) {
		var buttonMask = '';
		var screenX = e.xy.x;
		var screenY = e.xy.y;
		var lonlat = map.getLonLatFromViewPortPx(e.xy);
		var worldX = lonlat.lon;
		var worldY = lonlat.lat;
//alert(lonlat.lon);
		mouseUp(buttonMask, screenX, screenY, worldX, worldY)
}


// trasforma un punto da Gauss-Boaga a Sferico Mercatore (google)
// input x e y
// output oggetto Proj4js.Point (con proprietà x e y)
function pointGBtoSPH(x,y)
{
	x = parseInt(x-shiftGBtoSPHx); 
	y = parseInt(y+shiftGBtoSPHy); 
	var source = new Proj4js.Proj('EPSG:3003');    //source coordinates 
	var dest = new Proj4js.Proj('EPSG:900913');     //destination coordinates 
	var p = new Proj4js.Point(x,y);   //any object will do as long as it has 'x' and 'y' properties
	Proj4js.transform(source, dest, p);      //do the transformation.  x and y are modified in place
	return p;
}

function pointSPHtoGB(x,y)
{
	x = parseInt(x+shiftGBtoSPHx); 
	y = parseInt(y-shiftGBtoSPHy); 
	var source = new Proj4js.Proj('EPSG:900913');    //source coordinates 
	var dest = new Proj4js.Proj('EPSG:3003');     //destination coordinates 
	var p = new Proj4js.Point(x,y);   //any object will do as long as it has 'x' and 'y' properties
	Proj4js.transform(source, dest, p);      //do the transformation.  x and y are modified in place
	return p;
}






//------------------------------------------------------------------------------------------
// RISCRITTURA FUNZIONI DI DISEGNO
//
// riscrivo il l'handler per il disegno dei punti in modo da richiamare la funzione mouseUp
//
OpenLayers.Handler.Point = OpenLayers.Class(OpenLayers.Handler, {
    
    /**
     * Property: point
     * {<OpenLayers.Feature.Vector>} The currently drawn point
     */
    point: null,

    /**
     * Property: layer
     * {<OpenLayers.Layer.Vector>} The temporary drawing layer
     */
    layer: null,
    
    /**
     * Property: multi
     * {Boolean} Cast features to multi-part geometries before passing to the
     *     layer.  Default is false.
     */
    multi: false,
    
    /**
     * Property: drawing 
     * {Boolean} A point is being drawn
     */
    drawing: false,
    
    /**
     * Property: mouseDown
     * {Boolean} The mouse is down
     */
    mouseDown: false,

    /**
     * Property: lastDown
     * {<OpenLayers.Pixel>} Location of the last mouse down
     */
    lastDown: null,

    /**
     * Property: lastUp
     * {<OpenLayers.Pixel>}
     */
    lastUp: null,

    /**
     * APIProperty: persist
     * {Boolean} Leave the feature rendered until destroyFeature is called.
     *     Default is false.  If set to true, the feature remains rendered until
     *     destroyFeature is called, typically by deactivating the handler or
     *     starting another drawing.
     */
    persist: false,

    /**
     * Property: layerOptions
     * {Object} Any optional properties to be set on the sketch layer.
     */
    layerOptions: null,

    /**
     * Constructor: OpenLayers.Handler.Point
     * Create a new point handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} The control that owns this handler
     * callbacks - {Object} An object with a 'done' property whose value is a
     *             function to be called when the point drawing is finished.
     *             The callback should expect to recieve a single argument,
     *             the point geometry.  If the callbacks object contains a
     *             'cancel' property, this function will be called when the
     *             handler is deactivated while drawing.  The cancel should
     *             expect to receive a geometry.
     * options - {Object} An optional object with properties to be set on the
     *           handler
     */
    initialize: function(control, callbacks, options) {
        // TBD: deal with style
        this.style = OpenLayers.Util.extend(OpenLayers.Feature.Vector.style['default'], {});

        OpenLayers.Handler.prototype.initialize.apply(this, arguments);
    },
    
    /**
     * APIMethod: activate
     * turn on the handler
     */
    activate: function() {
        if(!OpenLayers.Handler.prototype.activate.apply(this, arguments)) {
            return false;
        }
        // create temporary vector layer for rendering geometry sketch
        // TBD: this could be moved to initialize/destroy - setting visibility here
        var options = OpenLayers.Util.extend({
            displayInLayerSwitcher: false,
            // indicate that the temp vector layer will never be out of range
            // without this, resolution properties must be specified at the
            // map-level for this temporary layer to init its resolutions
            // correctly
            calculateInRange: function() { return true; }
        }, this.layerOptions);
        this.layer = new OpenLayers.Layer.Vector(this.CLASS_NAME, options);
//alert(this.CLASS_NAME);
        this.map.addLayer(this.layer);
        return true;
    },
    
    /**
     * Method: createFeature
     * Add temporary features
     */
    createFeature: function() {
        this.point = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point()
        );
        this.layer.addFeatures([this.point], {silent: true});
    },

    /**
     * APIMethod: deactivate
     * turn off the handler
     */
    deactivate: function() {
        if(!OpenLayers.Handler.prototype.deactivate.apply(this, arguments)) {
            return false;
        }
        // call the cancel callback if mid-drawing
        if(this.drawing) {
            this.cancel();
        }
        this.destroyFeature();
        // If a layer's map property is set to null, it means that that layer
        // isn't added to the map. Since we ourself added the layer to the map
        // in activate(), we can assume that if this.layer.map is null it means
        // that the layer has been destroyed (as a result of map.destroy() for
        // example.
        if (this.layer.map != null) {
            this.layer.destroy(false);
        }
        this.layer = null;
        return true;
    },
    
    /**
     * Method: destroyFeature
     * Destroy the temporary geometries
     */
    destroyFeature: function() {
        if(this.layer) {
            this.layer.destroyFeatures();
        }
        this.point = null;
    },

    /**
     * Method: finalize
     * Finish the geometry and call the "done" callback.
     *
     * Parameters:
     * cancel - {Boolean} Call cancel instead of done callback.  Default is
     *     false.
     */
    finalize: function(cancel) {
        var key = cancel ? "cancel" : "done";
        this.drawing = false;
        this.mouseDown = false;
        this.lastDown = null;
        this.lastUp = null;
        this.callback(key, [this.geometryClone()]);
        if(cancel || !this.persist) {
            this.destroyFeature();
        }
    },

    /**
     * APIMethod: cancel
     * Finish the geometry and call the "cancel" callback.
     */
    cancel: function() {
        this.finalize(true);
    },

    /**
     * Method: click
     * Handle clicks.  Clicks are stopped from propagating to other listeners
     *     on map.events or other dom elements.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    click: function(evt) {
        OpenLayers.Event.stop(evt);
        return false;
    },

    /**
     * Method: dblclick
     * Handle double-clicks.  Double-clicks are stopped from propagating to other
     *     listeners on map.events or other dom elements.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    dblclick: function(evt) {
        OpenLayers.Event.stop(evt);
        return false;
    },
    
    /**
     * Method: drawFeature
     * Render features on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.point, this.style);
    },
    
    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.Point>}
     */
    getGeometry: function() {
        var geometry = this.point.geometry;
        if(this.multi) {
            geometry = new OpenLayers.Geometry.MultiPoint([geometry]);
        }
        return geometry;
    },

    /**
     * Method: geometryClone
     * Return a clone of the relevant geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry>}
     */
    geometryClone: function() {
        return this.getGeometry().clone();
    },
  
    /**
     * Method: mousedown
     * Handle mouse down.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousedown: function(evt) {
        // check keyboard modifiers
        if(!this.checkModifiers(evt)) {
            return true;
        }
        // ignore double-clicks
        if(this.lastDown && this.lastDown.equals(evt.xy)) {
            return true;
        }
        if(this.lastDown == null) {
            if(this.persist) {
                this.destroyFeature();
            }
            this.createFeature();
        }
        this.lastDown = evt.xy;
        this.drawing = true;
        var lonlat = this.map.getLonLatFromPixel(evt.xy);
        this.point.geometry.x = lonlat.lon;
        this.point.geometry.y = lonlat.lat;
        this.point.geometry.clearBounds();
        this.drawFeature();
        return false;
    },

    /**
     * Method: mousemove
     * Handle mouse move.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousemove: function (evt) {
        if(this.drawing) {
            var lonlat = this.map.getLonLatFromPixel(evt.xy);
            this.point.geometry.x = lonlat.lon;
            this.point.geometry.y = lonlat.lat;
            this.point.geometry.clearBounds();
            this.drawFeature();
        }
        return true;
    },

    /**
     * Method: mouseup
     * Handle mouse up.  Send the latest point in the geometry to the control.
     * Return determines whether to propagate the event on the map.
     *
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mouseup: function (evt) {
        if(this.drawing) {
            this.finalize();
			callMouseUp(evt);
            return false;
        } else {
            return true;
        }
    },

    CLASS_NAME: "OpenLayers.Handler.Point"
});


/* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
 * license.  See http://svn.openlayers.org/trunk/openlayers/license.txt for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler/Point.js
 * @requires OpenLayers/Geometry/Point.js
 * @requires OpenLayers/Geometry/LineString.js
 */

/**
 * Class: OpenLayers.Handler.Path
 * Handler to draw a path on the map.  Path is displayed on mouse down,
 * moves on mouse move, and is finished on mouse up.
 *
 * Inherits from:
 *  - <OpenLayers.Handler.Point>
 */
OpenLayers.Handler.Path = OpenLayers.Class(OpenLayers.Handler.Point, {
    
    /**
     * Property: line
     * {<OpenLayers.Feature.Vector>}
     */
    line: null,
    
    /**
     * Property: freehand
     * {Boolean} In freehand mode, the handler starts the path on mouse down,
     * adds a point for every mouse move, and finishes the path on mouse up.
     * Outside of freehand mode, a point is added to the path on every mouse
     * click and double-click finishes the path.
     */
    freehand: false,
    
    /**
     * Property: freehandToggle
     * {String} If set, freehandToggle is checked on mouse events and will set
     * the freehand mode to the opposite of this.freehand.  To disallow
     * toggling between freehand and non-freehand mode, set freehandToggle to
     * null.  Acceptable toggle values are 'shiftKey', 'ctrlKey', and 'altKey'.
     */
    freehandToggle: 'shiftKey',

    /**
     * Constructor: OpenLayers.Handler.Path
     * Create a new path hander
     *
     * Parameters:
     * control - {<OpenLayers.Control>} 
     * callbacks - {Object} An object with a 'done' property whos value is a
     *     function to be called when the path drawing is finished. The 
     *     callback should expect to recieve a single argument, the line 
     *     string geometry. If the callbacks object contains a 'point' 
     *     property, this function will be sent each point as they are added.  
     *     If the callbacks object contains a 'cancel' property, this function 
     *     will be called when the handler is deactivated while drawing. The 
     *     cancel should expect to receive a geometry.
     * options - {Object} An optional object with properties to be set on the
     *           handler
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.Point.prototype.initialize.apply(this, arguments);
    },
        
    /**
     * Method: createFeature
     * Add temporary geometries
     */
    createFeature: function() {
        this.line = new OpenLayers.Feature.Vector(
                                        new OpenLayers.Geometry.LineString());
        this.point = new OpenLayers.Feature.Vector(
                                        new OpenLayers.Geometry.Point());
        this.layer.addFeatures([this.line, this.point], {silent: true});
    },
        
    /**
     * Method: destroyFeature
     * Destroy temporary geometries
     */
    destroyFeature: function() {
        OpenLayers.Handler.Point.prototype.destroyFeature.apply(this);
        this.line = null;
    },

    /**
     * Method: destroyPoint
     * Destroy the temporary point.
     */
    destroyPoint: function() {
        if(this.point) {
            this.layer.destroyFeatures([this.point]);
        }
    },
    
    /**
     * Method: addPoint
     * Add point to geometry.  Send the point index to override
     * the behavior of LinearRing that disregards adding duplicate points.
     */
    addPoint: function() {
        this.line.geometry.addComponent(this.point.geometry.clone(),
                                        this.line.geometry.components.length);
        this.callback("point", [this.point.geometry, this.getGeometry()]);
    },
    
    /**
     * Method: freehandMode
     * Determine whether to behave in freehand mode or not.
     *
     * Returns:
     * {Boolean}
     */
    freehandMode: function(evt) {
        return (this.freehandToggle && evt[this.freehandToggle]) ?
                    !this.freehand : this.freehand;
    },

    /**
     * Method: modifyFeature
     * Modify the existing geometry given the new point
     */
    modifyFeature: function() {
        var index = this.line.geometry.components.length - 1;
        this.line.geometry.components[index].x = this.point.geometry.x;
        this.line.geometry.components[index].y = this.point.geometry.y;
        this.line.geometry.components[index].clearBounds();
    },
    
    /**
     * Method: drawFeature
     * Render geometries on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.line, this.style);
        this.layer.drawFeature(this.point, this.style);
    },

    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.LineString>}
     */
    getGeometry: function() {
        var geometry = this.line.geometry;
        if(this.multi) {
            geometry = new OpenLayers.Geometry.MultiLineString([geometry]);
        }
        return geometry;
    },

    /**
     * Method: mousedown
     * Handle mouse down.  Add a new point to the geometry and
     * render it. Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousedown: function(evt) {
        // ignore double-clicks
        if (this.lastDown && this.lastDown.equals(evt.xy)) {
            return false;
        }
        if(this.lastDown == null) {
            if(this.persist) {
                this.destroyFeature();
            }
            this.createFeature();
        }
        this.mouseDown = true;
        this.lastDown = evt.xy;
        var lonlat = this.control.map.getLonLatFromPixel(evt.xy);
        this.point.geometry.x = lonlat.lon;
        this.point.geometry.y = lonlat.lat;
        this.point.geometry.clearBounds();
        if((this.lastUp == null) || !this.lastUp.equals(evt.xy)) {
            this.addPoint();
        }
        this.drawFeature();
        this.drawing = true;
        return false;
    },

    /**
     * Method: mousemove
     * Handle mouse move.  Adjust the geometry and redraw.
     * Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mousemove: function (evt) {
        if(this.drawing) { 
            var lonlat = this.map.getLonLatFromPixel(evt.xy);
            this.point.geometry.x = lonlat.lon;
            this.point.geometry.y = lonlat.lat;
            this.point.geometry.clearBounds();
            if(this.mouseDown && this.freehandMode(evt)) {
                this.addPoint();
            } else {
                this.modifyFeature();
            }
            this.drawFeature();
        }
        return true;
    },
    
    /**
     * Method: mouseup
     * Handle mouse up.  Send the latest point in the geometry to
     * the control. Return determines whether to propagate the event on the map.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    mouseup: function (evt) {
        this.mouseDown = false;
        if(this.drawing) {
            if(this.freehandMode(evt)) {
                if(this.persist) {
                    this.destroyPoint();
                }
                this.finalize();
            } else {
                if(this.lastUp == null) {
                   this.addPoint();
                }
                this.lastUp = evt.xy;
            }
			callMouseUp(evt);
            return false;
        }
        return true;
    },
  
    /**
     * Method: dblclick 
     * Handle double-clicks.  Finish the geometry and send it back
     * to the control.
     * 
     * Parameters:
     * evt - {Event} The browser event
     *
     * Returns: 
     * {Boolean} Allow event propagation
     */
    dblclick: function(evt) {
        if(!this.freehandMode(evt)) {
            var index = this.line.geometry.components.length - 1;
            this.line.geometry.removeComponent(this.line.geometry.components[index]);
            if(this.persist) {
                this.destroyPoint();
            }
            this.finalize();
        }
        return false;
    },

    CLASS_NAME: "OpenLayers.Handler.Path"
});


/* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
 * license.  See http://svn.openlayers.org/trunk/openlayers/license.txt for the
 * full text of the license. */


/**
 * @requires OpenLayers/Handler/Path.js
 * @requires OpenLayers/Geometry/Polygon.js
 */

/**
 * Class: OpenLayers.Handler.Polygon
 * Handler to draw a polygon on the map.  Polygon is displayed on mouse down,
 * moves on mouse move, and is finished on mouse up.
 *
 * Inherits from:
 *  - <OpenLayers.Handler.Path>
 *  - <OpenLayers.Handler>
 */
OpenLayers.Handler.Polygon = OpenLayers.Class(OpenLayers.Handler.Path, {
    
    /**
     * Parameter: polygon
     * {<OpenLayers.Feature.Vector>}
     */
    polygon: null,

    /**
     * Constructor: OpenLayers.Handler.Polygon
     * Create a Polygon Handler.
     *
     * Parameters:
     * control - {<OpenLayers.Control>} 
     * callbacks - {Object} An object with a 'done' property whos value is
     *                          a function to be called when the path drawing is
     *                          finished. The callback should expect to recieve a
     *                          single argument, the polygon geometry.
     *                          If the callbacks object contains a 'point'
     *                          property, this function will be sent each point
     *                          as they are added.  If the callbacks object contains
     *                          a 'cancel' property, this function will be called when
     *                          the handler is deactivated while drawing.  The cancel
     *                          should expect to receive a geometry.
     * options - {Object} 
     */
    initialize: function(control, callbacks, options) {
        OpenLayers.Handler.Path.prototype.initialize.apply(this, arguments);
    },
    
    /**
     * Method: createFeature
     * Add temporary geometries
     */
    createFeature: function() {
        this.polygon = new OpenLayers.Feature.Vector(
                                        new OpenLayers.Geometry.Polygon());
        this.line = new OpenLayers.Feature.Vector(
                                        new OpenLayers.Geometry.LinearRing());
        this.polygon.geometry.addComponent(this.line.geometry);
        this.point = new OpenLayers.Feature.Vector(
                                        new OpenLayers.Geometry.Point());
        this.layer.addFeatures([this.polygon, this.point], {silent: true});
    },

    /**
     * Method: destroyFeature
     * Destroy temporary geometries
     */
    destroyFeature: function() {
        OpenLayers.Handler.Path.prototype.destroyFeature.apply(this);
        this.polygon = null;
    },

    /**
     * Method: modifyFeature
     * Modify the existing geometry given the new point
     * 
     */
    modifyFeature: function() {
        var index = this.line.geometry.components.length - 2;
        this.line.geometry.components[index].x = this.point.geometry.x;
        this.line.geometry.components[index].y = this.point.geometry.y;
        this.line.geometry.components[index].clearBounds();
    },

    /**
     * Method: drawFeature
     * Render geometries on the temporary layer.
     */
    drawFeature: function() {
        this.layer.drawFeature(this.polygon, this.style);
        this.layer.drawFeature(this.point, this.style);
    },
    
    /**
     * Method: getGeometry
     * Return the sketch geometry.  If <multi> is true, this will return
     *     a multi-part geometry.
     *
     * Returns:
     * {<OpenLayers.Geometry.Polygon>}
     */
    getGeometry: function() {
        var geometry = this.polygon.geometry;
        if(this.multi) {
            geometry = new OpenLayers.Geometry.MultiPolygon([geometry]);
        }
        return geometry;
    },

    /**
     * Method: dblclick
     * Handle double-clicks.  Finish the geometry and send it back
     * to the control.
     * 
     * Parameters:
     * evt - {Event} 
     */
    dblclick: function(evt) {
        if(!this.freehandMode(evt)) {
            // remove the penultimate point
            var index = this.line.geometry.components.length - 2;
            this.line.geometry.removeComponent(this.line.geometry.components[index]);
            if(this.persist) {
                this.destroyPoint();
            }
            this.finalize();
        }
        return false;
    },

    CLASS_NAME: "OpenLayers.Handler.Polygon"
});