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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Control/DragPan.js
* @requires OpenLayers/Control/PinchZoom.js
* @requires OpenLayers/Handler/Click.js
*/
/**
* Class: OpenLayers.Control.TouchNavigation
* The navigation control handles map browsing with touch events (dragging,
* double-tapping, tap with two fingers, and pinch zoom). Create a new
* control with the <OpenLayers.Control.TouchNavigation> constructor.
*
* If you’re only targeting touch enabled devices with your mapping application,
* you can create a map with only a TouchNavigation control. The
* <OpenLayers.Control.Navigation> control is mobile ready by default, but
* you can generate a smaller build of the library by only including this
* touch navigation control if you aren't concerned about mouse interaction.
*
* Inherits:
* - <OpenLayers.Control>
*/
OpenLayers.Control.TouchNavigation = OpenLayers.Class(OpenLayers.Control, {
/**
* Property: dragPan
* {<OpenLayers.Control.DragPan>}
*/
dragPan: null,
/**
* APIProperty: dragPanOptions
* {Object} Options passed to the DragPan control.
*/
dragPanOptions: null,
/**
* Property: pinchZoom
* {<OpenLayers.Control.PinchZoom>}
*/
pinchZoom: null,
/**
* APIProperty: pinchZoomOptions
* {Object} Options passed to the PinchZoom control.
*/
pinchZoomOptions: null,
/**
* APIProperty: clickHandlerOptions
* {Object} Options passed to the Click handler.
*/
clickHandlerOptions: null,
/**
* APIProperty: documentDrag
* {Boolean} Allow panning of the map by dragging outside map viewport.
* Default is false.
*/
documentDrag: false,
/**
* APIProperty: autoActivate
* {Boolean} Activate the control when it is added to a map. Default is
* true.
*/
autoActivate: true,
/**
* Constructor: OpenLayers.Control.TouchNavigation
* Create a new navigation control
*
* Parameters:
* options - {Object} An optional object whose properties will be set on
* the control
*/
initialize: function(options) {
this.handlers = {};
OpenLayers.Control.prototype.initialize.apply(this, arguments);
},
/**
* Method: destroy
* The destroy method is used to perform any clean up before the control
* is dereferenced. Typically this is where event listeners are removed
* to prevent memory leaks.
*/
destroy: function() {
this.deactivate();
if(this.dragPan) {
this.dragPan.destroy();
}
this.dragPan = null;
if (this.pinchZoom) {
this.pinchZoom.destroy();
delete this.pinchZoom;
}
OpenLayers.Control.prototype.destroy.apply(this,arguments);
},
/**
* Method: activate
*/
activate: function() {
if(OpenLayers.Control.prototype.activate.apply(this,arguments)) {
this.dragPan.activate();
this.handlers.click.activate();
this.pinchZoom.activate();
return true;
}
return false;
},
/**
* Method: deactivate
*/
deactivate: function() {
if(OpenLayers.Control.prototype.deactivate.apply(this,arguments)) {
this.dragPan.deactivate();
this.handlers.click.deactivate();
this.pinchZoom.deactivate();
return true;
}
return false;
},
/**
* Method: draw
*/
draw: function() {
var clickCallbacks = {
click: this.defaultClick,
dblclick: this.defaultDblClick
};
var clickOptions = OpenLayers.Util.extend({
"double": true,
stopDouble: true,
pixelTolerance: 2
}, this.clickHandlerOptions);
this.handlers.click = new OpenLayers.Handler.Click(
this, clickCallbacks, clickOptions
);
this.dragPan = new OpenLayers.Control.DragPan(
OpenLayers.Util.extend({
map: this.map,
documentDrag: this.documentDrag
}, this.dragPanOptions)
);
this.dragPan.draw();
this.pinchZoom = new OpenLayers.Control.PinchZoom(
OpenLayers.Util.extend({map: this.map}, this.pinchZoomOptions)
);
},
/**
* Method: defaultClick
*
* Parameters:
* evt - {Event}
*/
defaultClick: function (evt) {
if(evt.lastTouches && evt.lastTouches.length == 2) {
this.map.zoomOut();
}
},
/**
* Method: defaultDblClick
*
* Parameters:
* evt - {Event}
*/
defaultDblClick: function (evt) {
this.map.zoomTo(this.map.zoom + 1, evt.xy);
},
CLASS_NAME: "OpenLayers.Control.TouchNavigation"
});