/**
 * Copyright (c) 2006 Peter Goodman
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 */

//--------------------------------------------
// Class for dealing with effects and such.
//--------------------------------------------

class FA.build.fx extends FA.Query
{
	//--------------------------------------------
	// Move a movie clip from where it is to some
	// point on the stage.
	//--------------------------------------------
	
	public function moveTo (x:Number, y:Number, speed:String) : FA.Query
	{
		if (_object instanceof MovieClip)
		{
			var num_milliseconds:Number = (speed == "slow") ? 10 : 5;
			
			//--------------------------------------------
			// make sure the x and y coordinates of the
			// object are set.
			//--------------------------------------------
			
			_object._x = _object._x || 0;
			_object._y = _object._y || 0;
			
			//--------------------------------------------
			// Figure out how far left/right and up/down
			// the movie clip will move.
			//--------------------------------------------
			
			var diff_x:Number = Math.abs(x - _object._x);
			var diff_y:Number = Math.abs(y - _objext._y);
			
			//--------------------------------------------
			// Find out the hypotenuse of the move.
			//--------------------------------------------
			
			var hypotenuse:Number = Math.sqrt( (diff_x ^ 2) + (diff_y ^ 2) );
			
			//--------------------------------------------
			// Figure out how far up/down and left/right the
			// movie clip should go on each loop.
			//--------------------------------------------
			
			var interval_x:Number = Math.floor(interval_z / hypotenuse) * (coords[0] < _object._x ? -1 : 1);
			var interval_y:Number = Math.floor(interval_z / hypotenuse) * (coords[1] < _objext._y ? -1 : 1);
			
			this.do_move(x, y, interval_x, interval_y, num_milliseconds);
		}
		
		return this;
	}
	
	private function do_move (x, y, interval_x, interval_y, num_milliseconds) : Void
	{
		//--------------------------------------------
		// Move the movie clip.
		//--------------------------------------------
		
		if (_object._x < x or _object._y < y)
		{
			_object._x = (_object._x < x) ? _object._x + interval_x : x;
			_object._y = (_object._y < y) ? _object._y + interval_x : y;
			
			setTimeout(this, "do_move", num_milliseconds, x, y, interval_x, interval_y, num_milliseconds);
		}
		
		//--------------------------------------------
		// The movie clip has been moved.
		//--------------------------------------------
		
		else
		{
			self._x = x;
			self._y = y;
			updateAfterEvent();
		}
	}
	
	//--------------------------------------------
	// Rotate a movie clip.
	//--------------------------------------------
	
	public function rotateTo (angle:Number, speed:String) : FA.Query
	{
		
		return this;
	}
	
	//--------------------------------------------
	// Scale a movie clip.
	//--------------------------------------------
	
	public function scaleTo (percent:Number, speed:String) : FA.Query
	{
		if(_object instanceof MovieClip or _object instanceof TextField)
		{
			var num_milliseconds:Number = (speed == "slow") ? 10 : 5;
			var interval:Number = (percent < 100) ? -1 : 1;
			
			var interval_x:Number, interval_y:Number;
			
			//--------------------------------------------
			// A little hack so that when we divide x by y, 
			// we don't get NaN.
			//--------------------------------------------
			
			var width:Number = _object._width == 0 ? 1 : _object._width;
			var height:Number = _object._height == 0 ? 1 : _object._height;
			
			//--------------------------------------------
			// Figure out proportional intervals to scale
			// both sides of the movie clip with.
			//--------------------------------------------
			
			if(_object._width > _object._height)
			{
				interval_x = interval;
				interval_y = Math.ceil( (width / height) * interval );
			}
			else
			{
				interval_y = interval;
				interval_x = Math.ceil( (width / height) * interval );
			}
			
			//--------------------------------------------
			// Make sure we know the original x and y coordinates
			// so that we can adjust the movie clip as we scale it.
			//--------------------------------------------
			
			var x_pos:Number = _object._x;
			var y_pos:Number = _object._y;
			
			this.do_scale(interval_x, interval_y, num_milliseconds, percent);
		}
		
		return this;
	}
	
	private function do_scale (interval_x, interval_y, num_milliseconds, percent)
	{
		var continue_scale_x:Boolean = (interval_x < 0) ? _object._xscale > percent : _object._xscale < percent;
		var continue_scale_y:Boolean = (interval_y < 0) ? _object._yscale > percent : _object._yscale < percent;
		
		if (continue_scale_x or continue_scale_y)
		{
			_object._xscale = continue_scale_x ? _object._xscale + interval_x : percent;
			_object._yscale = continue_scale_y ? _object._yscale + interval_y : percent;
			
			setTimeout(this, "do_scale", num_milliseconds, interval_x, interval_y, num_milliseconds, percent);
		}
		else
		{
			self._xscale = self._yscale = percent;
			updateAfterEvent();
		}
	}
	
	//--------------------------------------------
	// Fade a movie clip from one percentage to
	// another.
	//--------------------------------------------
	
	public function fadeTo (to:Number, speed:String) : FA.Query
	{
		var num_milliseconds:Number = (speed == "slow") ? 10 : 5;
		var interval:Number = (from > to) ? -1 : 1;
		
		this.do_fade(interval, num_milliseconds, to);
		
		return this;
	}
	
	private function do_fade (interval, num_milliseconds, to) : Void
	{
		var continue_fade:Boolean = (interval < 0) ? _object._alpha > to : _object._alpha < to;

		if (continue_fade)
		{
			_object._alpha += interval;
			
			setTimeout(this, "do_fade", num_milliseconds, interval, num_milliseconds, to);
		}
		else
		{
			_object._alpha = to;
			updateAfterEvent();
		}
	}
	
	//--------------------------------------------
	// Set the transparency of a movie clip / button / text field.
	//--------------------------------------------
	
	public function setAlpha (num) : FA.Query
	{
		if (_object instanceof MovieClip or _object instanceof Button or _object instanceof TextField)
		{
			_object._alpha = 100;
		}
		
		return this;
	}
	
	//--------------------------------------------
	// Show a movie clip.
	//--------------------------------------------
	
	public function show () : FA.Query
	{
		_object._visible = true;
		return this.setAlpha(100);
	}
	
	//--------------------------------------------
	// Hide a movie clip.
	//--------------------------------------------
	
	public function hide () : FA.Query
	{
		_object._visible = false;
		return this.setAlpha(0);
	}
}