07d333cc79
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc4@3178 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
94 lines
2.9 KiB
JavaScript
94 lines
2.9 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @class
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*
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* @requires OpenLayers/Control/ZoomBox.js
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* @requires OpenLayers/Control/DragPan.js
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* @requires OpenLayers/Handler/MouseWheel.js
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*/
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OpenLayers.Control.Navigation = OpenLayers.Class.create();
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OpenLayers.Control.Navigation.prototype =
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OpenLayers.Class.inherit( OpenLayers.Control, {
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/** @type OpenLayers.Control.ZoomBox */
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dragPan: null,
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/** @type OpenLayers.Control.ZoomBox */
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zoomBox: null,
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/** @type OpenLayers.Handler.MouseWheel */
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wheelHandler: null,
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activate: function() {
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this.dragPan.activate();
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this.wheelHandler.activate();
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this.zoomBox.activate();
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return OpenLayers.Control.prototype.activate.apply(this,arguments);
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},
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deactivate: function() {
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this.zoomBox.deactivate();
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this.dragPan.deactivate();
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this.wheelHandler.deactivate();
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return OpenLayers.Control.prototype.deactivate.apply(this,arguments);
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},
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draw: function() {
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this.map.events.register( "dblclick", this, this.defaultDblClick );
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this.dragPan = new OpenLayers.Control.DragPan({map: this.map});
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this.zoomBox = new OpenLayers.Control.ZoomBox(
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{map: this.map, keyMask: OpenLayers.Handler.MOD_SHIFT});
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this.dragPan.draw();
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this.zoomBox.draw();
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this.wheelHandler = new OpenLayers.Handler.MouseWheel(
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this, {"up" : this.wheelUp,
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"down": this.wheelDown} );
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this.activate();
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},
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/**
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* @param {Event} evt
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*/
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defaultDblClick: function (evt) {
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var newCenter = this.map.getLonLatFromViewPortPx( evt.xy );
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this.map.setCenter(newCenter, this.map.zoom + 1);
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OpenLayers.Event.stop(evt);
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return false;
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},
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wheelChange: function(evt, deltaZ) {
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var newZoom = this.map.getZoom() + deltaZ;
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if (!this.map.isValidZoomLevel(newZoom)) return;
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var size = this.map.getSize();
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var deltaX = size.w/2 - evt.xy.x;
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var deltaY = evt.xy.y - size.h/2;
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var newRes = this.map.baseLayer.resolutions[newZoom];
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var zoomPoint = this.map.getLonLatFromPixel(evt.xy);
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var newCenter = new OpenLayers.LonLat(
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zoomPoint.lon + deltaX * newRes,
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zoomPoint.lat + deltaY * newRes );
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this.map.setCenter( newCenter, newZoom );
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},
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/** User spun scroll wheel up
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*
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*/
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wheelUp: function(evt) {
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this.wheelChange(evt, 1);
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},
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/** User spun scroll wheel down
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*
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*/
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wheelDown: function(evt) {
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this.wheelChange(evt, -1);
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Control.Navigation"
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});
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