Flash电子杂志常用滚动区域控制代码

CODE: //自动调整遮罩的xy和宽
if (is_set_mask) {
    my_mask_mc._x = my_move_mc._x;
    my_mask_mc._y = my_move_mc._y;
    my_mask_mc._width = my_move_mc._width;
    my_move_mc.setMask(my_mask_mc);
}
//支持滚轮移动  
if (is_mouse_enable) {
    var mouseListener:Object = new Object();
    mouseListener.onMouseWheel = function(delta) {
        if (delta>0) {
            my_dir = 1;
        } else {
            my_dir = -1;
        }
        speed *= scale_mouse*scale;
        move_me();
        speed /= scale_mouse*scale;
    };
    Mouse.addListener(mouseListener);
}
//给向上的按钮赋予事件            
my_up_btn.onRollOver = function() {
    move_it = true;
    my_dir = 1;
};
my_up_btn.onRollOut = function() {
    move_it = false;
};
my_up_btn.onPress = function() {
    speed *= scale;
};
my_up_btn.onRelease = function() {
    speed /= scale;
};
my_up_btn.onReleaseOutside = function() {
    speed /= scale;
    move_it = false;
};
//给向下的按钮赋予事件           
my_down_btn.onRollOver = function() {
    move_it = true;
    my_dir = -1;
};
my_down_btn.onRollOut = function() {
    move_it = false;
};
my_down_btn.onPress = function() {
    speed *= scale;
};
my_down_btn.onRelease = function() {
    speed /= scale;
};
my_down_btn.onReleaseOutside = function() {
    speed /= scale;
    move_it = false;
};
//判断是否该移动           
my_move_mc.onEnterFrame = function() {
    if (move_it) {
        move_me();
    }
};
//移动mc           
function move_me() {
    if ((my_move_mc._y+my_dir*speed)>max1) {
        my_move_mc._y = max1;
    } else {
        if ((my_move_mc._y+my_dir*speed)<min1) {
            my_move_mc._y = min1;
        } else {
            my_move_mc._y += my_dir*speed;
        }
    }
}