|
|
|
|
主要是考虑到添加键盘事件的方便
(编者注:用光标键可使上下左右移动)
效果如下：
代码如下：
import fc.events.EventDispatcher;
import fc.utils.Delegate;
class fc.key.FKey {
private var _isDowning:String;
private var _keyCode:Number;
private var addEventListener:Function;
private var removeEventListener:Function;
private var dispatchEvent:Function;
private var id:Number;
public function FKey(keyCode) {
EventDispatcher.initialize(this);
_keyCode = keyCode;
init();
}
private function init() {
var obj = new Object();
var ins = this;
obj.onKeyDown = function() {
ins.down();
};
obj.onKeyUp = function() {
ins.up();
};
Key.addListener(obj);
id = setInterval(Delegate.create(this, event), 30);
}
private function down() {
if (Key.getCode() == _keyCode) {
_isDowning = "down";
}
}
private function up() {
if (Key.getCode() == _keyCode) {
_isDowning = "up";
}
}
private function event() {
if (_isDowning == "down") {
dispatchEvent({type:"onKeyDown", target:_keyCode,value:true});
} else if (_isDowning == "up") {
dispatchEvent({type:"onKeyUp", target:_keyCode,value:false});
_isDowning = "";
}
}
public function get isDowning() {
return _isDowning;
}
}
//简单用法
import fc.key.FKey;
import fc.utils.Delegate;
class Test {
private var left:FKey;
private var right:FKey;
private var top:FKey;
private var bottom:FKey;
private var mc:MovieClip;
private var v=2
function Test(mc) {
this.mc = mc;
init();
}
function init() {
//四个方向键的key code
left = new FKey(37);
right = new FKey(39);
top = new FKey(38);
bottom = new FKey(40);
left.addEventListener("onKeyDown", Delegate.create(this, leftMove));
right.addEventListener("onKeyDown", Delegate.create(this, rightMove));
top.addEventListener("onKeyDown", Delegate.create(this, topMove));
bottom.addEventListener("onKeyDown", Delegate.create(this, bottomMove));
}
function leftMove(o) {
mc._x-=v
}
function rightMove() {
mc._x+=v
}
function topMove() {
mc._y-=v
}
function bottomMove() {
mc._y+=v
}
}
//复杂一点的，如果用粒子系统制作加减速会更好
import fc.key.FKey;
import fc.utils.Delegate;
class Test {
private var left:FKey;
private var right:FKey;
private var top:FKey;
private var bottom:FKey;
private var mc:MovieClip;
var _vx = 0;
var _vy = 0;
var _a = 0.2;
var _f = 0.96;
var _m = 5;
var _dx = 0;
var _dy = 0;
var _k:String;
var _id;
function Test(mc) {
this.mc = mc;
init();
}
function init() {
left = new FKey(37);
right = new FKey(39);
top = new FKey(38);
bottom = new FKey(40);
left.addEventListener("onKeyDown", Delegate.create(this, acce));
left.addEventListener("onKeyUp", Delegate.create(this, dece));
right.addEventListener("onKeyDown", Delegate.create(this, acce));
right.addEventListener("onKeyUp", Delegate.create(this, dece));
top.addEventListener("onKeyDown", Delegate.create(this, acce));
top.addEventListener("onKeyUp", Delegate.create(this, dece));
bottom.addEventListener("onKeyDown", Delegate.create(this, acce));
bottom.addEventListener("onKeyUp", Delegate.create(this, dece));
}
function acce(o) {
if ((o.target == 37 || o.target == 39) && _vx<_m) {
_vx += _a;
}
if ((o.target == 38 || o.target == 40) && _vy<_m) {
_vy += _a;
}
if (o.target == 37) {
_dx = -1;
}
if (o.target == 38) {
_dy = -1;
}
if (o.target == 39) {
_dx = 1;
}
if (o.target == 40) {
_dy = 1;
}
//还需几个同时按键的判断
mc._x += _vx*_dx;
mc._y += _vy*_dy;
}
function dece() {
var ins = this;
mc.onEnterFrame = function() {
trace([ins._vx, ins._vy]);
ins._vx *= ins._f;
ins._vy *= ins._f;
this._x += ins._vx*ins._dx;
this._y += ins._vy*ins._dy;
if (Math.round(ins._vx) == 0 && Math.round(ins._vy) == 0) {
delete this.onEnterFrame;
}
};
}
} |
|
|
tom.com