/*

************************************************************

  Keyboard support

    Keys:

      RIGHT Arrow  : Go to Next page

      LEFT Arrow   : Go to Previous page

      Page UP      : Go to Index page

      HOME         : Go to First page

      END          : Go to Last page

      S, s         : Toggle start/stop slide show (not in index)

      ESC          : Stop slide show (not in index)

      I, i         : Toggle exif info (not in index)

      H, h         : Toggle help tips

    Tested on: IE6, Mozilla 1.4, Netscape 7.1, Opera 7.2



    Bugs:

     - HOME,END doesn't work in Opera

************************************************************

*/



var takenAction = false;



//IE&Gecko Code

function IEGeckoKeyPress(oEvent) 

{

	var myKeyCode;



	if (!oEvent)

	    oEvent = window.event;

	if (oEvent.keyCode)

	    myKeyCode = oEvent.keyCode;

	else if (oEvent.which)

	    myKeyCode = oEvent.which;



	if (oEvent.repeat || takenAction)

	    return;

	if (myKeyCode >= 16 && myKeyCode <= 18)

	    return;



	/*if (oEvent.shiftKey)

	    myKeyCode += 1000;

	if (oEvent.ctrlKey)

	    myKeyCode += 2000;

	if (oEvent.altKey)

	    myKeyCode += 4000;*/

	//alert(oEvent.type + "=" + myKeyCode);

	myKeyPress(myKeyCode);

}



function myKeyPress(myKeyCode) 

{

	//disable if remarks window is open

	if( activeElement!=null )

		return;



	if( myKeyCode==39 || myKeyCode==107 ) // RIGHT Arrow   ||   NUM +

	{

		if( hasRealNextPage )

		{

			takenAction = true;

			nextPage();

		}

	}

	else if( myKeyCode==37 || myKeyCode==109 ) // LEFT Arrow    ||    NUM -

	{

		if( hasRealPrevPage )

		{

			takenAction = true;

			prevPage();

		}

	}

	else if( myKeyCode==33 ) // Page UP

	{

		takenAction = true;

		upPage();

	}

	else if( myKeyCode==36 ) // HOME

	{

		takenAction = true;

		firstPage();

	}

	else if( myKeyCode==35 ) // END

	{

		takenAction = true;

		lastPage();

	}

	else if( myKeyCode==27 ) // ESC

	{

		if( isSlideShow )

		{

			// Only if i have slide show

			takenAction = true;

			dontSlides();

			takenAction = false;

		}

	}

	else if( myKeyCode==83 ) // S, s

	{

		if( isSlideShow )

		{

			// Only if i have slide show

			takenAction = true;

			toggleSlideShow();

			takenAction = false;

		}

	}

	else if( myKeyCode==73 ) // I, i

	{

		if( hasMetaData )

		{

			// Only if metadata exists

			takenAction = true;

			toggleElementVisibility("photometainfo");

			takenAction = false;

		}

	}

	else if( myKeyCode==72 ) // H, h

	{

		if( hasNavigationHelpTips )

		{

			// Only if help tips are ON

			takenAction = true;

			toggleElementVisibility("help");

			takenAction = false;

		}

	}

	else

	{

		//alert("KeyCode: " + myKeyCode);

	}

}



function initKeyboard() 

{

	document.onkeydown = IEGeckoKeyPress;

}