/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the Clear BSD license.
* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
* full text of the license. */
/**
* @requires OpenLayers/Control.js
*/
/**
* Class: OpenLayers.Control.Pan
* The Pan control is a single button to pan the map in one direction. For
* a more complete control see <OpenLayers.Control.PanPanel>.
*
* Inherits from:
* - <OpenLayers.Control>
*/
OpenLayers.Control.Pan = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: slideFactor
* {Integer} Number of pixels by which we'll pan the map in any direction
* on clicking the arrow buttons, defaults to 50.
*/
slideFactor: 50,
/**
* Property: direction
* {String} in {'North', 'South', 'East', 'West'}
*/
direction: null,
/**
* Property: type
* {String} The type of <OpenLayers.Control> -- When added to a
* <Control.Panel>, 'type' is used by the panel to determine how to
* handle our events.
*/
type: OpenLayers.Control.TYPE_BUTTON,
/**
* Constructor: OpenLayers.Control.Pan
* Control which handles the panning (in any of the cardinal directions)
* of the map by a set px distance.
*
* Parameters:
* direction - {String} The direction this button should pan.
* options - {Object} An optional object whose properties will be used
* to extend the control.
*/
initialize: function(direction, options) {
this.direction = direction;
this.CLASS_NAME += this.direction;
OpenLayers.Control.prototype.initialize.apply(this, [options]);
},
/**
* Method: trigger
*/
trigger: function(){
switch (this.direction) {
case OpenLayers.Control.Pan.NORTH:
this.map.pan(0, -this.slideFactor);
break;
case OpenLayers.Control.Pan.SOUTH:
this.map.pan(0, this.slideFactor);
break;
case OpenLayers.Control.Pan.WEST:
this.map.pan(-this.slideFactor, 0);
break;
case OpenLayers.Control.Pan.EAST:
this.map.pan(this.slideFactor, 0);
break;
}
},
CLASS_NAME: "OpenLayers.Control.Pan"
});
OpenLayers.Control.Pan.NORTH = "North";
OpenLayers.Control.Pan.SOUTH = "South";
OpenLayers.Control.Pan.EAST = "East";
OpenLayers.Control.Pan.WEST = "West";
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