/* 

		dw_wipes.js		wipe methods for dynObj 

		(requires dw_core.js, dw_clip.js, and dw_util.js)

		version date: October 2002 (this.wiping prop added)

		

		This code is from Dynamic Web Coding  

		at http://www.dyn-web.com/

    Copyright 2002 by Sharon Paine 

    See Terms of Use at http://www.dyn-web.com/bus/terms.html

    Permission granted to use this code 

    as long as this entire notice is included.

		

		Idea and math for time-based animation from:

		Aaron Boodman at www.youngpup.net 

		and Mike Foster at www.cross-browser.com

*/



// wipe called can be prevented

var wipe_halt = false;	



// args: which wipe, delay, wipeTime, what next (fn)

dynObj.prototype.wipe=function(which,delay,wipeTime,fn) {

	if (wipe_halt||this.wiping) return;

	this.wipeTime=wipeTime||1000; this.delay=delay||100; this.fn=fn;

	switch (which) {

		// wipe into view by expanding to the right

		case "in right" :

			this.clipTo(0,0,this.height,0);

			this.show();

      setTimeout(this.obj+".wipe_in_rt()",this.delay);

  	break;

		

		// wipe into view by expanding from the center out

		case "in center" :

			this.vCenter = Math.ceil(this.height/2);

			this.hCenter = Math.ceil(this.width/2);

			this.clipTo(this.vCenter,this.hCenter,this.vCenter,this.hCenter);

			this.show();

			setTimeout(this.obj+".wipe_in_center()",this.delay);

		break;

		

		// wipe into view from upper left corner to lower right

		case "in corner" :

			this.clipTo(0,0,0,0);

			this.show();

			setTimeout(this.obj+".wipe_in_corner()",this.delay);

		break;

		

		// wipe into view from top to bottom

		case "in top" :

			this.clipTo(0,0,0,0);

			this.show();

			setTimeout(this.obj+".wipe_in_top()",this.delay);

		break;

		

		// wipe out of view by contracting to the center

		case "out center" :

			this.vCenter = Math.ceil(this.height/2);

			this.hCenter = Math.ceil(this.width/2);

			setTimeout(this.obj+".wipe_out_center()",this.delay);

		break;

		

		// wipe out of view by contracting to the left

		case "out left" :

			setTimeout(this.obj+".wipe_out_left()",this.delay);

		break;

		

		// wipe out of view by contracting to the right

		case "out right" :

			setTimeout(this.obj+".wipe_out_right()",this.delay);

  	break;

		

		// wipe out of view by contracting from left and right

  	case "out middle" :

			this.dest=Math.ceil(this.width/2);

      setTimeout(this.obj+".wipe_out_mid()",this.delay);

		break;

		

		// wipe out of view from the upper left to lower right

		case "out corner" :

			setTimeout(this.obj+".wipe_out_corner()",this.delay);

		break;

		

		// wipe out of view from bottom to top

		case "out top" :

			setTimeout(this.obj+".wipe_out_top()",this.delay);

		break;

		

		// wipe out of view from top to bottom

		case "out bottom" :

			setTimeout(this.obj+".wipe_out_bottom()",this.delay);

		break;

		

		// wipe out of view from lower right to upper left

		case "out top left" :

			setTimeout(this.obj+".wipe_out_top_left()",this.delay);

		break;

		

  	default:

			alert("Oops! Check choices again.");

	}

	this.wipeStart = new Date().getTime()+this.delay;

	this.per = Math.PI/(2*this.wipeTime);

}



// wipe into view by expanding to the right

dynObj.prototype.wipe_in_rt=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

//	wipes could potentially be steady, accelerate, or decelerate

//	idea and math from Mike Foster at www.cross-browser.com

//	var inc = this.width*Math.sin(this.per*elapsed);	// decelerate

//	var inc = -this.width*Math.cos(this.per*elapsed)+this.width;	// accel

	var inc = this.width*((1/this.wipeTime)*elapsed);	// steady

	this.clipTo(0,inc,this.height,0);

	setTimeout(this.obj+".wipe_in_rt()",35);

	} else {

		this.clipTo(0,this.width,this.height,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe into view by expanding from the center out

dynObj.prototype.wipe_in_center=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	var vinc = this.vCenter*((1/this.wipeTime)*elapsed);

	var hinc = this.hCenter*((1/this.wipeTime)*elapsed);

	this.clipTo(this.vCenter-vinc,this.hCenter+hinc,this.vCenter+vinc,this.hCenter-hinc);

	setTimeout(this.obj+".wipe_in_center()",35);

	} else {

		this.clipTo(0,this.width,this.height,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe into view from upper left corner to lower right

dynObj.prototype.wipe_in_corner=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	var vinc = this.height*((1/this.wipeTime)*elapsed);

	var hinc = this.width*((1/this.wipeTime)*elapsed);

	this.clipTo(0,hinc,vinc,0);

	setTimeout(this.obj+".wipe_in_corner()",35);

	} else {

		this.clipTo(0,this.width,this.height,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe into view from top to bottom

dynObj.prototype.wipe_in_top=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	var inc = this.height*((1/this.wipeTime)*elapsed);

	this.clipTo(0,this.width,inc,0);

	setTimeout(this.obj+".wipe_in_top()",35);

	} else {

		this.clipTo(0,this.width,this.height,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view by contracting to the center

dynObj.prototype.wipe_out_center=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	var vinc = this.vCenter*((1/this.wipeTime)*elapsed);

	var hinc = this.hCenter*((1/this.wipeTime)*elapsed);

	this.clipTo(vinc,this.width-hinc,this.height-vinc,hinc);

		setTimeout(this.obj+".wipe_out_center()",35);

	} else {

		this.clipTo(this.vCenter,this.hCenter,this.vCenter,this.hCenter);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view by contracting to the left

dynObj.prototype.wipe_out_left=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

		var inc = this.width*((1/this.wipeTime)*elapsed);

		this.clipTo(0,this.width-inc,this.height,0);

		setTimeout(this.obj+".wipe_out_left()",35);

	} else {

		this.clipTo(0,0,this.height,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view by contracting to the right

dynObj.prototype.wipe_out_right=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

		var inc = this.width*((1/this.wipeTime)*elapsed);

		this.clipTo(0,this.width,this.height,inc);

		setTimeout(this.obj+".wipe_out_right()",35);

	} else {

	this.clipTo(0,this.width,this.height,this.width);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view by contracting from left and right

dynObj.prototype.wipe_out_mid=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

//	var inc = this.dest*Math.sin(this.per*elapsed);

	// this one accelerates

	var inc = -this.dest*Math.cos(this.per*elapsed)+this.dest;

//	var inc = this.dest*((1/this.wipeTime)*elapsed);

		this.clipTo(0,this.width-inc,this.height,inc);

		setTimeout(this.obj+".wipe_out_mid()",35);

	} else {

		this.clipTo(0,this.dest,this.height,this.dest);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view from upper left to lower right

dynObj.prototype.wipe_out_corner=function () {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	// accelerates

	var vinc = -this.height*Math.cos(this.per*elapsed)+this.height;

	var hinc = -this.width*Math.cos(this.per*elapsed)+this.width;

		this.clipTo(vinc,this.width,this.height,hinc);

		setTimeout(this.obj+".wipe_out_corner()",35);

	} else {

		this.clipTo(this.height,this.width,this.height,this.width);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view from bottom to top

dynObj.prototype.wipe_out_top=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

		var inc = this.height*((1/this.wipeTime)*elapsed);

		this.clipTo(0,this.width,this.height-inc,0);

		setTimeout(this.obj+".wipe_out_top()",35);

	} else {

	this.clipTo(0,this.width,this.height,this.width);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view from top to bottom

dynObj.prototype.wipe_out_bottom=function() {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

		var inc = this.height*((1/this.wipeTime)*elapsed);

		this.clipTo(inc,this.width,this.height,0);

		setTimeout(this.obj+".wipe_out_bottom()",35);

	} else {

	this.clipTo(0,this.width,this.height,this.width);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}



// wipe out of view from lower right to upper left

dynObj.prototype.wipe_out_top_left=function () {

	this.wiping = true;

	var clipVal = this.getClipValues();

	var elapsed = (new Date().getTime())-this.wipeStart;

	if (elapsed<this.wipeTime) {

	var vinc = -this.height*Math.cos(this.per*elapsed)+this.height;

	var hinc = -this.width*Math.cos(this.per*elapsed)+this.width;

		this.clipTo(0,this.width-hinc,this.height-vinc,0);

		setTimeout(this.obj+".wipe_out_top_left()",35);

	} else {

		this.clipTo(0,0,0,0);

		this.wiping = false;

		if (this.fn) eval(this.fn);

	}

}