怎么清除AS画线?
我用FLASH AS写了一个画线的AS，在执行擦除时，每次只能擦掉一条线，如果想一次擦完，应该怎么办？请教各位大师，先谢了。
源程序如下:
var lines = new XML("<?xml version=\"1.0\" standalone=\"no\"?><lines></lines>");
var num = 0;
function DrawLine(id, depth, x1, y1, x2, y2) {
this.createEmptyMovieClip(id, depth);
with (this[id]) {
lineStyle(1, 0x000000, 100);
moveTo(x1, y1);
lineTo(x2, y2);
}
}
this.onMouseDown = function() {
dragging = true;
startpointx = _xmouse;
startpointy = _ymouse;
moved = false;
};
this.onMouseUp = function() {
dragging = false;
if (moved) {
tempnode = new XML("<line x1=\""+startpointx+"\" x2=\""+_xmouse+"\" y1=\""+startpointy+"\" y2=\""+_ymouse+"\"></line>");
lines.childNodes[0].appendChild(tempnode);
trace(lines.toString());
lines = new XML(lines.toString());
num += 1;
moved = false;
}
moved = false;
};
this.onMouseMove = function() {
moved = true;
if (dragging) {
DrawLine("line"+num, num, startpointx, startpointy, _xmouse, _ymouse);
}
updateAfterEvent(this.onMouseMove);
};
undo.onPress=function(){
dragging=false;
}
redo.onPress=undo.onPress
undo.onRelease = function() {
moved = false;
num--;
removeMovieClip("line"+num);
};
redo.onRelease = function() {
moved = false;
startpointx = lines.childNodes[0].childNodes[num].attributes.x1;
startpointy = lines.childNodes[0].childNodes[num].attributes.y1;
endpointx = lines.childNodes[0].childNodes[num].attributes.x2;
endpointy = lines.childNodes[0].childNodes[num].attributes.y2;
DrawLine("line"+num, num, startpointx, startpointy, endpointx, endpointy);
num++;
};
