Contents

/*
 * L.Handler.MapDrag is used internally by L.Map to make the map draggable.
 */

L.Map.Drag = L.Handler.extend({
	addHooks: function () {
		if (!this._draggable) {
			this._draggable = new L.Draggable(this._map._mapPane, this._map._container);

			this._draggable
				.on('dragstart', this._onDragStart, this)
				.on('drag', this._onDrag, this)
				.on('dragend', this._onDragEnd, this);

			var options = this._map.options;

			if (options.worldCopyJump && !options.continuousWorld) {
				this._draggable.on('predrag', this._onPreDrag, this);
				this._map.on('viewreset', this._onViewReset, this);
			}
		}
		this._draggable.enable();
	},

	removeHooks: function () {
		this._draggable.disable();
	},

	moved: function () {
		return this._draggable && this._draggable._moved;
	},

	_onDragStart: function () {
		this._map
			.fire('movestart')
			.fire('dragstart');
	},

	_onDrag: function () {
		this._map
			.fire('move')
			.fire('drag');
	},

	_onViewReset: function () {
		var pxCenter = this._map.getSize().divideBy(2),
			pxWorldCenter = this._map.latLngToLayerPoint(new L.LatLng(0, 0));

		this._initialWorldOffset = pxWorldCenter.subtract(pxCenter);
	},

	_onPreDrag: function () {
		var map = this._map,
			worldWidth = map.options.scale(map.getZoom()),
			halfWidth = Math.round(worldWidth / 2),
			dx = this._initialWorldOffset.x,
			x = this._draggable._newPos.x,
			newX1 = (x - halfWidth + dx) % worldWidth + halfWidth - dx,
			newX2 = (x + halfWidth + dx) % worldWidth - halfWidth - dx,
			newX = Math.abs(newX1 + dx) < Math.abs(newX2 + dx) ? newX1 : newX2;

		this._draggable._newPos.x = newX;
	},

	_onDragEnd: function () {
		var map = this._map;

		map
			.fire('moveend')
			.fire('dragend');

		if (map.options.maxBounds) {
			// TODO predrag validation instead of animation
			L.Util.requestAnimFrame(this._panInsideMaxBounds, map, true, map._container);
		}
	},

	_panInsideMaxBounds: function () {
		this.panInsideBounds(this.options.maxBounds);
	}
});

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
leaflet-ruby-0.3.beta4	lib/leaflet/src/map/handler/Map.Drag.js
leaflet-ruby-0.3.beta3	lib/leaflet/src/map/handler/Map.Drag.js
leaflet-ruby-0.3.beta1	lib/leaflet/src/map/handler/Map.Drag.js