[OpenLayers] 控件系列之SelectFeature同时支持hover与click

       也许很多时候，selectfeature只需要hover或者click就能达到选择要素的目的，但是当你遇到某些境况，要让你两者兼得，就苦逼了.....因为clickFeature与overFeature互斥

我是新手，在没看源码之前是苦憋了很久，那个痛苦。看完selectfeature源码，顿时有改的冲动，但是又怕影响其他人使用，最后选择了扩展.

以下是clickFeature：

clickFeature: function(feature) {
        if(!this.hover) {
            var selected = (OpenLayers.Util.indexOf(
                feature.layer.selectedFeatures, feature) > -1);
            if(selected) {
                if(this.toggleSelect()) {
                    this.unselect(feature);
                } else if(!this.multipleSelect()) {
                    this.unselectAll({except: feature});
                }
            } else {
                if(!this.multipleSelect()) {
                    this.unselectAll({except: feature});
                }
                this.select(feature);
            }
        }
    },

以下是overFeature:

overFeature: function(feature) {
        var layer = feature.layer;
        if(this.hover) {
            if(this.highlightOnly) {
                this.highlight(feature);
            } else if(OpenLayers.Util.indexOf(
                layer.selectedFeatures, feature) == -1) {
                this.select(feature);
            }
        }
    },

以下是继承的SelectFeatureExtend

/**
 * Class: OpenLayers.Control.SelectFeatureExtend
 * 
 * Overwrite the function clickFeature,let it works whether this.hover is false or true 
 *
 * Inherits from:
 *  - <OpenLayers.Control.SelectFeature>
 */
OpenLayers.Control.SelectFeatureExtend = OpenLayers.Class(OpenLayers.Control.SelectFeature, {
    /**
     * Method: clickFeature
     * Called on click in a feature
     * responds whether this.hover is false or true.
     *
     * Parameters:
     * feature - {<OpenLayers.Feature.Vector>} 
     */
    clickFeature: function(feature) {
        var selected = (OpenLayers.Util.indexOf(
            feature.layer.selectedFeatures, feature) > -1);
        if(selected) {
            if(this.toggleSelect()) {
                this.unselect(feature);
            } else if(!this.multipleSelect()) {
                this.unselectAll({except: feature});
            }
        } else {
            if(!this.multipleSelect()) {
                this.unselectAll({except: feature});
            }
            this.select(feature);
        }
    },
    CLASS_NAME: "OpenLayers.Strategy.SelectFeatureExtend"
});