a += this.sizingSplitter.position; this.isDraggingLeft = !!(a > 0); if(!this.activeSizing){ var min = this.paneBefore.position + this.paneBefore.sizeMin; if(a < min){ a = min; } var max = this.paneAfter.position + (this.paneAfter.sizeActual - (this.sizerWidth + this.paneAfter.sizeMin)); if(a > max){ a = max; } } a -= this.sizingSplitter.position; this._checkSizes(); return a;