Installed leaflet in extlib

[mediagoblin.git] / extlib / leaflet / src / map / ext / Map.PanAnimation.js

L.Map.include(!(L.Transition && L.Transition.implemented()) ? {} : {\r
	setView: function(center, zoom, forceReset) {\r
		zoom = this._limitZoom(zoom);\r
		var zoomChanged = (this._zoom != zoom);\r
\r
		if (this._loaded && !forceReset && this._layers) {\r
			// difference between the new and current centers in pixels\r
			var offset = this._getNewTopLeftPoint(center).subtract(this._getTopLeftPoint()); \r
			\r
			var done = (zoomChanged ? \r
						!!this._zoomToIfCenterInView && this._zoomToIfCenterInView(center, zoom, offset) : \r
						this._panByIfClose(offset));\r
			\r
			// exit if animated pan or zoom started\r
			if (done) { return this; }\r
		}\r
		\r
		// reset the map view \r
		this._resetView(center, zoom);\r
		\r
		return this;\r
	},\r
	\r
	panBy: function(offset) {\r
		if (!this._panTransition) {\r
			this._panTransition = new L.Transition(this._mapPane, {duration: 0.3});\r
			\r
			this._panTransition.on('step', this._onPanTransitionStep, this);\r
			this._panTransition.on('end', this._onPanTransitionEnd, this);\r
		}\r
		this.fire(this, 'movestart');\r
		\r
		this._panTransition.run({\r
			position: L.DomUtil.getPosition(this._mapPane).subtract(offset)\r
		});\r
		\r
		return this;\r
	},\r
	\r
	_onPanTransitionStep: function() {\r
		this.fire('move');\r
	},\r
	\r
	_onPanTransitionEnd: function() {\r
		this.fire('moveend');\r
	},\r
\r
	_panByIfClose: function(offset) {\r
		if (this._offsetIsWithinView(offset)) {\r
			this.panBy(offset);\r
			return true;\r
		}\r
		return false;\r
	},\r
\r
	_offsetIsWithinView: function(offset, multiplyFactor) {\r
		var m = multiplyFactor || 1,\r
			size = this.getSize();\r
		return (Math.abs(offset.x) <= size.x * m) && \r
				(Math.abs(offset.y) <= size.y * m);\r
	}\r
});