TOUCH_STARTイベント時にドラッグ開始位置を記憶して、
TOUCH_MOVEイベントで随時座標を変化させる感じ。
var bear = new Sprite(32, 32);
bear.image = game.assets['chara1.gif'];
bear.x = 100;
bear.y = 200;
bear.addEventListener(enchant.Event.TOUCH_START, function(e){
originX = e.x - this.x;
originY = e.y - this.y;
});
bear.addEventListener(enchant.Event.TOUCH_MOVE, function(e){
this.x = e.x - originX;
this.y = e.y - originY;
});
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