/*
	COUNTDOWN LIVE - by Mattias Buelens
	File: WndPrefTabs.js
	Desc: Functions and events for WndPrefTabs
*/

//Callback function of WndPrefTabs for LoadPrefChilds
function LoadPrefTabs(PlusWnd, ParentWnd) {
	LoadToolTips(PlusWnd);
	Temp.WndPref["TabScrollX"] = 0;
	Temp.WndPref["TabWidth"] = 37;
	Temp.WndPref["TabCount"] = 10;
	var Size = GetWindowSize(PlusWnd.Handle);
	Temp.WndPref["TabVisible"] = (Size !== false) ? Math.floor(Size[0] / Temp.WndPref["TabWidth"]) : 8;
}

//Reloads the language of the WndPrefTabs window, called by WndPref_ReloadLang
function WndPrefTabs_ReloadLang(PlusWnd) {
	UpdateToolTips(PlusWnd);
}

//Switch to a tab
function WndPref_SwitchTab(sTabName) {
	ClickBtn(Temp.WndPref["ChildTabs"], "RadTab"+sTabName);
}

/* FUNCTION: WndPrefTabs_Scroll
	Desc: Scrolls the tabs list
	Parameters:
	 Options - Object with scroll options, two methods are supported:
		- { [number] move }
		  Moves the scroll pointer.
		  Example: { move: 2 } -> Scrolls the list 2 to the right.
		- { [string] visible }
		  Makes sure that a given tab is visible.
		  Example: { visible: "Countdown" } -> Scrolls the list so the tab Countdown is visible.
*/
function WndPrefTabs_Scroll(Options) {
	if(!IsWindow("WndPref") || typeof Options !== "object") return false;
	var PlusWnd = Temp.WndPref["ChildTabs"];
	if(!IsWindow(PlusWnd)) return false;

	var nTabWidth = Temp.WndPref["TabWidth"];
	var nScrollX = Temp.WndPref["TabScrollX"];

	for(var Key in Options) break;
	switch(Key) {
		case "move":
			var nMove = -Math.floor(Options[Key]);
			var bEnableLeft = true, bEnableRight = true;
			//Calculate the new scrolling position
			var nNewX = nScrollX + nMove * nTabWidth;
			//Calculate the right limit
			var nRightLimit = -(Temp.WndPref["TabCount"] - Temp.WndPref["TabVisible"]) * nTabWidth;
			if(Temp.WndPref["TabVisible"] === Temp.WndPref["TabCount"]) {
				//Disable both arrow buttons when width can hold all tabs
				DoScroll(-nScrollX);
				bEnableLeft = bEnableRight = false;
			} else if(nNewX > 0) {
				//Clip to the left limit
				DoScroll(-nScrollX);
				var bEnableLeft = false;
			} else if(nNewX < nRightLimit) {
				//Clip to the right limit
				DoScroll(nRightLimit - nScrollX);
				var bEnableRight = false;
			} else {
				//Scroll without clipping
				DoScroll(nMove * nTabWidth);
				var bEnableLeft = (nNewX < 0);
				var bEnableRight = (nNewX > nRightLimit);
			}
			//Enable the arrow buttons
			EnableWindow(Wnd["WndPref"].GetControlHandle("BtnTabLeft"), bEnableLeft);
			EnableWindow(Wnd["WndPref"].GetControlHandle("BtnTabRight"), bEnableRight);
			break;
		case "visible":
			var nTabLeft = -Math.floor(nScrollX / nTabWidth); //Most left visible tab
			if(typeof Options[Key] === "string") {
				//A tab name was given
				var CtrlId = "RadTab" + Options[Key];
				if(!PlusWnd.GetControlHandle(CtrlId)) return false;
				//Find out the position of the requested tab
				var WinPos = GetWindowRect(PlusWnd.Handle);
				if(WinPos === false) return false;
				var CtrlPos = GetWindowRect(PlusWnd.GetControlHandle(CtrlId));
				var CtrlX = CtrlPos.x - WinPos.x;
				var nTabNum = nTabLeft + Math.floor(CtrlX / nTabWidth); //Tab number
			} else if(typeof Options[Key] === "number") {
				//A tab number was given
				var nTabNum = Math.floor(Options[Key]);
			}
			//If the tab number isn't between the visible tab limits, scroll the list
			if(nTabNum < nTabLeft) {
				var nMove = Math.floor(CtrlX / nTabWidth);
			} else if(nTabNum >= Temp.WndPref["TabVisible"] + nTabLeft) {
				var nMove = Math.floor(CtrlX / nTabWidth) + 1 - Temp.WndPref["TabVisible"];
			} else var nMove = 0;
			WndPrefTabs_Scroll({ move:nMove });
			break;
	}

	function DoScroll(dX) {
		var Result = Interop.Call("user32", "ScrollWindowEx",
			/*hWnd*/ PlusWnd.Handle,
			/*dX*/ dX, /*dY*/ 0,
			/*prcScroll*/ 0, /*prcClip*/ 0,
			/*hrgnUpdate*/ 0, /*prcUpdate*/ 0,
			/*flags*/ SW_INVALIDATE | SW_SCROLLCHILDREN
		);
		if(Result === 0) return false;
		Temp.WndPref["TabScrollX"] += dX;
	}
}

//Resizes the tabs list, used on window resizing
function WndPrefTabs_Resize(PlusWnd, ChildWnd, nWidth, nHeight) {
	var Width = 0, Height = 0;
	var nTabWidth = Temp.WndPref["TabWidth"];
	var PosChild = GetElementPos(PlusWnd, "HoldTabs");

	if(PosChild) {
		Width = PosChild.w;
		Height = PosChild.h;
	} else {
		Width = nWidth - (/* Left */ 109 + /* Right */ 195);
		Height = 31;
	}
	var NewWidth = Math.min(Width - (Width % nTabWidth), Temp.WndPref["TabCount"] * nTabWidth);
	Temp.WndPref["TabVisible"] = Math.min(Math.floor(Width / nTabWidth), Temp.WndPref["TabCount"]);
	var WndPos = GetWindowRect(PlusWnd.Handle);
	var BtnPos = GetWindowRect(PlusWnd.GetControlHandle("BtnTabRight"));
	if(WndPos && BtnPos) {
		var BtnX = 109 + (Temp.WndPref["TabVisible"]) * nTabWidth;
		var BtnY = 51;
		Interop.Call("user32", "MoveWindow", PlusWnd.GetControlHandle("BtnTabRight"), BtnX, BtnY, BtnPos.w, BtnPos.h, true);
	}
	Interop.Call("user32", "SetWindowPos", ChildWnd.Handle, 0, 0, 0, NewWidth, Height, 18);
	WndPrefTabs_Scroll({ visible:Temp.WndPref["CurTab"] });
}

//Events
function OnWndPrefTabsEvent_CtrlClicked(PlusWnd, CtrlId) {
	Trace("> WndPrefTabs : Control "+CtrlId+" clicked");
	if(/^RadTab(.+)$/.test(CtrlId)) {
		var ChildId = RegExp.$1;
		WndPref_ShowChild(ChildId);
		WndPrefTabs_Scroll({ visible: ChildId });
	}
}