// READ THE COMMENTS BEFORE USING THIS!!
// this is originally written & compiled in Swishscript 2. I've converted it to AS2 (its almost the same) but you may still find minor errors in it. If so just edit til it works.
// if you code wit classes, you'll need to edit thigns a bit.
// if you code on frames, this may not work - its written assuming your game is all on one frame.
// if you code on frames, then stop doing that and write your next game on one frame only. its a lot easier from a coding point of view.
// it looks complicated, but just follow the instructions carefully and its simple :)
// highlighted lines are where you need to edit

// BEFORE YOU USE THE CODE
// you need a movieclip at _root.inv.inventory
// items in the inventory should be named item0, item1, item2, etc.
// so the path to your second item would be _root.inv.inventory.item1
// this is annoying if you only have a few items in your game, but for Sleeping Beauty I had 30+, and this way I could loop through them without knowing what each one was named.

// next make another movieclip called invdisplay, on the root again. put a copy of all your inventory items in here, with the same name as they have in the inventory. centre each one and set the registration point to centre as well.
// this movieclip will show the item the player is currently holding

// REQUIRED FUNCTIONS
// these go on _root
// do not edit them!

function holdingitem(number) {
// this is for when the player takes an item from the inventory
    for (i=0; i<_root.inventory.maxitems; i++) {
       _root.["invdisplay.item" + i]._visible = false;
       _root["inventory.inv.item" + i]._alpha = 100;
    }
    _root["_root.invdisplay.item" + number]._visible = true;
    _root["_root.inventory.inv.item" + number]._alpha = 50;
    _root.itemheld = number;

}
function replaceitem() {
// this is called when you replace an item
    for (i=0; i<_root.inventory.maxitems; i++) {
        _root["invdisplay.item" + i]._visible = false;
      _root["inventory.inv.item" + i]._alpha = 100;
    }
    _root.itemheld = -1;
}

function itemget(number) {
// this is for picking an item up and putting it in the inventory
    eval("_root.inventory.inv.item" + number)._visible = true;
    _root.inventory.invhilight2._visible = true;
}

onSelfEvent (enterFrame) {
// this is so that the inventory display follows the mouse around
    _root.invdisplay._x = _root._xmouse;
    _root.invdisplay._y = _root._ymouse;
}

// INVENTORY MOVIECLIP
// put this on the inventory movieclip (not inventory.inv)
// edit the highlighted line only!
// all this is for is to hide every item the player hasn't collected.

onClipEvent (load) {
    invopen = 0;
    otheropen = 0;
// number of items you have in total for the whole game. remember you start counting at 0.
    maxitems = 5;
    for (i = 0; i < maxitems; i++) {
_root["inv.item" + i]._visible = false;
    }
}

// ON ITEMS IN THE INVENTORY
// put this code on each item in the inventory. edit the highlighted lines with the number from the name of the item, eg this code goes on _root.inventory.inv.item4.

on (press) {
 if (_root.itemheld !=4) {
        _root.holdingitem(4);
    }
    else {
        _root.replaceitem();
    }
}

// ON INVDISPLAY
// hide items on load. dont edit this.

onSelfEvent (load) {
    for (i = 0; i<_root.inventory.maxitems; i++) {
        _root["item" + i]._visible = false;
    }
}


// ITEM COLLECTION
// put this on your items in the game, where the player wil lbe picking them up.
// you may need to edit this depending if you use buttons, movieclips, whatever.
// its written assuming? your item is in its own movieclip, eg _root.yourlevel1.itemclip.item0. if this isn't the case you may find it makes your whole movie vanish! edit as required or put items in movieclips.

on (press){
_visible=false;
// put the number of the item here, eg this is for item0
 _root.itemget(0);
}

// VARIABLES & USE
// Set _root.itemheld to -1 at the start of your movie.
// _root.itemheld is set to the number of the item the player is holding, and bcak to -1 when they replace it.
// Lets say item2 is a key and we want to check if the player is holding it whne they try to unlock a door:

if(_root.itemheld==2){
_root.replaceitem;
blah blah open the door :)
}

// OTHER
// use _root.replaceitem() to to put any held items back in the inventory. you can call this even if they're not holding anytihng (for example, I use it whe speech plays, so that there's no items on screen while there's dialogue going on).
// if you want items to vanish after using them, set their visibility or alpha in trhe inventory AFTER you call replaceitem()
// this code isn';t perfect or the most efficient it could be. i improve it a little each new time i use it, but it could stil lbe a lot better
// feel free to edit it however you like, i'm sure a more advanced programmer than me would laugh at it anyway ;D
// the fact thatit works is good enough for me though :)
// if you need more help with it go ahead and ask.