效果如下:
今天写了这个效果的代码
用在主页的diary里
觉得以前用scroll对象来控制文本框，滚动起来比较生硬
其中drag为滚动条名字
block为文本框
b_up,b_down为上下滚动按钮
主要方法是用block始终跟随drag的位置变化而滚动
而b_up,b_down更有鼠标滚轮都是直接控制drag的位置变化的，从而间接控制文本框的滚动
// JTL
// http://www.hartech.cn
// e-mail: jtl.zheng@gmail.com
//初始化函数
function Var() {
//滚动条和上下按钮的间隙
space = 31;
//上下按钮的滚动速度
updown_speed = 5;
//文本框的滚动范围
block_range = block._height-mark._height;
//文本框的初始位置
block_origin = block._y;
//滚动条的滚动范围
drag_range = b_down._y-b_up._y-2*space;
//滚动条的初始位置
drag_origin = b_up._y space;
//初始化滚动条位置
drag._y = drag_origin;
//滚动缓冲系数
k = .1;
}
Var();
//block为文本框，始终跟随滚动条（drag）变化
block.onEnterFrame = function() {
//pos为文本框目标位置
pos = block_origin-(drag._y-drag_origin)*block_range/drag_range;
//缓冲效果
this._y = (pos-this._y)*k;
};
drag.onPress = function() {
this.startDrag(false, this._x, drag_origin, this._x, (drag_origin drag_range));
};
drag.onRelease = function() {
this.stopDrag();
};
//up_down按钮
b_up.onPress = function() {
onEnterFrame = function () {
if (drag._y<=drag_origin) {
drag._y = drag_origin;
} else {
drag._y -= updown_speed;
}
};
};
b_up.onRelease = function() {
onEnterFrame = null;
};
b_down.onPress = function() {
onEnterFrame = function () {
if (drag._y>=drag_origin drag_range) {
drag._y = drag_origin drag_range;
} else {
drag._y = updown_speed;
}
};
};
b_down.onRelease = function() {
onEnterFrame = null;
};
//侦听mouse滚轮
mouseListener = new Object();
mouseListener.onMouseWheel = function(delta) {
if (delta>0) {
drag._y -= updown_speed*2;
}
if (delta<0) {
drag._y = updown_speed*2;
}
if (drag._y<=drag_origin) {
drag._y = drag_origin;
}
if (drag._y>=drag_origin drag_range) {
drag._y = drag_origin drag_range;
}
};
Mouse.addListener(mouseListener);
建立文本框代码
loadVariables("text/diary.txt", this);
myTextFormat = new TextFormat();
myTextFormat.font = "宋体";
myTextFormat.size = 12;
myTextFormat.leading = 3;
createTextField("test_txt", 10, 0, 0, 210, 10);
test_txt.multiline = true;
test_txt.wordWrap = true;
test_txt.autoSize = true;
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