38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
// xSlideTo, Copyright 2001-2005 Michael Foster (Cross-Browser.com)
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// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL
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function xSlideTo(e, x, y, uTime)
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{
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if (!(e=xGetElementById(e))) return;
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if (!e.timeout) e.timeout = 25;
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e.xTarget = x; e.yTarget = y; e.slideTime = uTime; e.stop = false;
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e.yA = e.yTarget - xTop(e); e.xA = e.xTarget - xLeft(e); // A = distance
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if (e.slideLinear) e.B = 1/e.slideTime;
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else e.B = Math.PI / (2 * e.slideTime); // B = period
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e.yD = xTop(e); e.xD = xLeft(e); // D = initial position
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var d = new Date(); e.C = d.getTime();
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if (!e.moving) _xSlideTo(e);
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}
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function _xSlideTo(e)
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{
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if (!(e=xGetElementById(e))) return;
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var now, s, t, newY, newX;
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now = new Date();
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t = now.getTime() - e.C;
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if (e.stop) { e.moving = false; }
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else if (t < e.slideTime) {
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setTimeout("_xSlideTo('"+e.id+"')", e.timeout);
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if (e.slideLinear) s = e.B * t;
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else s = Math.sin(e.B * t);
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newX = Math.round(e.xA * s + e.xD);
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newY = Math.round(e.yA * s + e.yD);
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xMoveTo(e, newX, newY);
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e.moving = true;
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}
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else {
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xMoveTo(e, e.xTarget, e.yTarget);
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e.moving = false;
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}
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}
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