Openlayers 自定义控件

OpenLayers.Control.YourControl = OpenLayers.Class(OpenLayers.Control, {

    // may private properties here ...

    initialize: function(options) {

        OpenLayers.Control.prototype.initialize.apply(this, arguments);

        // initialize private settings here ...

    },

    draw: function() {

        OpenLayers.Control.prototype.draw.apply(this);

        // add private elements here ...

        return this.div;

    },

    destroy: function() {

        // delete private elements here ...

        OpenLayers.Control.prototype.destroy.apply(this);

    },

    // may event handlers here ...

    CLASS_NAME: "OpenLayers.Control.YourControl"

});