Adding a GUI button to this script that is hidden until criteria is met?

Questions & Answers
1

Is it possible to add a GUI button into this script, and add a counter to it, that uses the current amount of REPAIRKITS that are currently in the inventory, and make the button invisible until the counter reaches a certain number. And once that number is reached make it visible? I know how to put the button in, i just dont know how to do the rest of that. If it is possible what would be the code that would make it possible? Thanks!

enum InventoryItem{
	DEBUG_ITEM,
	SCREW,
	NUT,
	BOSS_TRAY,
	BOSS_PLOWBLADE,
	BOSS_WINDBLADE,
	ENERGYPACK,
	REPAIRKIT,
	COUNT_NUM_ITEMS
}
  
var PlayerInventory: int[] ;

var playerStatus: Player_Status; 
playerStatus = GetComponent(Player_Status) ;

//Item Properties------------------------------------------------------------------------------------------------
private var repairKitHealAmt = 5.0;
private var energyPackHealAmt = 10.0;

//Initilaize Widget's starting Inventory-------------------------------------------------------------------------
function Start(){
	
	PlayerInventory = new int[InventoryItem.COUNT_NUM_ITEMS];
	
	for (var item in PlayerInventory){
		PlayerInventory[item] = 0;
	}

	//Give Widget some starting items
	PlayerInventory[InventoryItem.ENERGYPACK] = 0;
	PlayerInventory[InventoryItem.REPAIRKIT] = 0;
		
}

//Inventory Management Functions---------------------------------------------------------------------------------
function GetItem(item: InventoryItem, amount: int){
	PlayerInventory[item] += amount;
}

function UseItem(item: InventoryItem, amount: int){
	
	if(PlayerInventory[item] <= 0) return;
	
	PlayerInventory[item] -= amount;
	
	switch(item){
		case InventoryItem.ENERGYPACK:
			playerStatus.AddEnergy(energyPackHealAmt);
			break;
		case InventoryItem.REPAIRKIT:
			playerStatus.AddHealth(repairKitHealAmt);
			break;
	}
	
}

function CompareItemCount(compItem: InventoryItem, compNumber: int){

	return PlayerInventory[compItem] >= compNumber;
}

function GetItemCount(compItem: InventoryItem){
	return PlayerInventory[compItem];
}

@script AddComponentMenu("Inventory/Widget's Inventory")
2

It’s easy to do that with the GUI system, because GUI items are drawn each frame - just draw the button only when the desired REPAIRKITS amount is reached - something like this:

function OnGUI(){
    if (repairKitAmount >= minAmount){ // only draw the button if min amount reached
        if (GUI.Button(Rect(10, 10, 200, 30), "MyButton")){
            // do whatever you want when the button is pressed
        }
    }
}