覆蓋的moveTo和OpenLayers.Map

Question

的moveByPx方法如何覆蓋消除「movestart」事件觸發的變焦以外的任何行動OpenLayers.Map的的moveTo和moveByPx方法呢？

Answer 1

map = new OpenLayers.Map("map"); 

OpenLayers.Map.prototype.moveByPx = function (a, b) { 
    var c = this.size.w/2, 
     d = this.size.h/2, 
     e = c + a, 
     f = d + b, 
     g = this.baseLayer.wrapDateLine, 
     h = 0, 
     k = 0; 

    this.restrictedExtent && (h = c, k = d, g = !1); 

    a = g || e <= this.maxPx.x - h && e >= this.minPx.x + h ? Math.round(a) : 0; 
    b = f <= this.maxPx.y - k && f >= this.minPx.y + k ? Math.round(b) : 0; 

    if (a || b) { 
     this.dragging || (this.dragging = !0); 
     this.center = null; 
     a && (this.layerContainerOriginPx.x -= a, this.minPx.x -= a, this.maxPx.x -= a); 
     b && (this.layerContainerOriginPx.y -= b, this.minPx.y -= b, this.maxPx.y -= b); 
     this.applyTransform(); 
     d = 0; 
     for (e = this.layers.length; d < e; ++d) 
      c = this.layers[d], c.visibility && (c === this.baseLayer || c.inRange) && (c.moveByPx(a, b), c.events.triggerEvent("move")); 
     this.events.triggerEvent("move") 
    } 
} 

map.events.register("movestart", map, function (e) { 
    My Code... 
});