OpenLayers复制矢量图形Control

这个Control的初始化需要传入一个VectorLayer和一个MousePosition控件，当用户按下Ctrl+V时，自动复制VectorLayer层的第一个选中对象并且将之拷贝到鼠标在地图上的当前位置（从MousePosition获得）

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

    initialize: function(vectorLayer, mousePositionCtl) {
    	this.layer = vectorLayer;
    	this.mousePositionCtl = mousePositionCtl;
        OpenLayers.Control.prototype.initialize.apply(this, arguments);
    },
    
    destroy: function() {
        if (this.handler) {
            this.handler.destroy();
        }        
        this.handler = null;
        
        OpenLayers.Control.prototype.destroy.apply(this, arguments);
    },
    
    draw: function() {
        this.handler = new OpenLayers.Handler.Keyboard( this, { 
                                "keydown": this.defaultKeyPress }, {
                                "keyMask": OpenLayers.Handler.MOD_CTRL
                                });
        this.activate();
    },
    
    defaultKeyPress: function (evt) {
    	
        switch(evt.keyCode) {
            case 86:
            	var vector = this.layer.selectedFeatures[0];
            	if(vector) {
            		var lonLat = this.layer.map.getLonLatFromPixel(this.mousePositionCtl.lastXy);
            		var newVector = vector.clone();
            		this.layer.addFeatures([newVector]);
            		newVector.move(lonLat);
            	}
        } 
    },

    CLASS_NAME: "OpenLayers.Control.CopyControl"
});

转载自：https://blog.csdn.net/lanshan_84/article/details/83456558