// Same as SwitchComponent, but with buttons.
Class KFGUI_SwitchMenuBar extends KFGUI_MultiComponent;

var array<KFGUI_Base> SubPages;
var() byte ButtonPosition; // 0 = top, 1 = bottom, 2 = left, 3 = right
var() float BorderWidth,ButtonAxisSize; // Width for buttons.
var() float PagePadding; // Padding for pages

var int NumButtons,CurrentPageNum,PageComponentIndex;
var array<KFGUI_Button> PageButtons;

function ShowMenu()
{
    GrabKeyFocus();
    Super.ShowMenu();
}

function CloseMenu()
{
    ReleaseKeyFocus();
    Super.CloseMenu();
}

// Remember to call InitMenu() on the newly created page after.
final function KFGUI_Base AddPage( class<KFGUI_Base> PageClass, string Caption, string Hint, optional out KFGUI_Button Button )
{
    local KFGUI_Base P;
    local KFGUI_Button B;
    
    // Add page.
    P = new (Self) PageClass;
    P.Owner = Owner;
    P.ParentComponent = Self;
    SubPages.AddItem(P);

    // Add page switch button.
    B = new (Self) class'KFGUI_Button';
    B.ButtonText = Caption;
    B.ToolTip = Hint;
    B.OnClickLeft = PageSwitched;
    B.OnClickRight = PageSwitched;
    B.IDValue = NumButtons;
    
    if( ButtonPosition<2 )
    {
        B.XPosition = NumButtons*ButtonAxisSize;
        B.XSize = ButtonAxisSize*0.99;

        if( ButtonPosition==0 )
            B.YPosition = 0.f;
        else B.YPosition = YSize-BorderWidth*0.99;
        B.YSize = BorderWidth*0.99;
        
        if( NumButtons>0 )
            PageButtons[PageButtons.Length-1].ExtravDir = 1;
    }
    else
    {
        if( ButtonPosition==2 )
            B.XPosition = 0.f;
        else B.XPosition = XSize-BorderWidth*0.99;
        B.XSize = BorderWidth*0.99;
        
        B.YPosition = NumButtons*ButtonAxisSize;
        B.YSize = ButtonAxisSize*0.99;
        if( NumButtons>0 )
            PageButtons[PageButtons.Length-1].ExtravDir = 2;
    }

    ++NumButtons;
    PageButtons.AddItem(B);
    AddComponent(B);
    Button = B;
    return P;
}

function PageSwitched( KFGUI_Button Sender )
{
    SelectPage(Sender.IDValue);
}

final function SelectPage( int Index )
{
    PlayMenuSound(MN_LostFocus);
    
    if( CurrentPageNum>=0 )
    {
        PageButtons[CurrentPageNum].bIsHighlighted = false;
        SubPages[CurrentPageNum].CloseMenu();
        Components.Remove(PageComponentIndex,1);
        PageComponentIndex = -1;
    }
    CurrentPageNum = (Index>=0 && Index<SubPages.Length) ? Index : -1;
    if( CurrentPageNum>=0 )
    {
        PageButtons[CurrentPageNum].bIsHighlighted = true;
        SubPages[CurrentPageNum].ShowMenu();
        PageComponentIndex = Components.Length;
        Components.AddItem(SubPages[CurrentPageNum]);
    }
}

function PreDraw()
{
    local int i;
    local byte j;
    
    if( !bVisible )
        return;

    if( CurrentPageNum==-1 && NumButtons>0 )
        SelectPage(0);
    ComputeCoords();
    Canvas.SetOrigin(CompPos[0],CompPos[1]);
    Canvas.SetClip(CompPos[0]+CompPos[2],CompPos[1]+CompPos[3]);
    DrawMenu();
    for( i=0; i<Components.Length; ++i )
    {
        Components[i].Canvas = Canvas;
        for( j=0; j<4; ++j )
            Components[i].InputPos[j] = CompPos[j];
        if( i==PageComponentIndex )
        {
            switch( ButtonPosition )
            {
            case 0:
                Components[i].InputPos[1] += (InputPos[3]*BorderWidth*PagePadding);
            case 1:
                Components[i].InputPos[3] -= (InputPos[3]*BorderWidth*PagePadding);
                break;
            case 2:
                Components[i].InputPos[0] += (InputPos[2]*BorderWidth*PagePadding);
            default:
                Components[i].InputPos[2] -= (InputPos[2]*BorderWidth*PagePadding);
            }
        }
        Components[i].PreDraw();
    }
}

function bool ReceievedControllerInput(int ControllerId, name Key, EInputEvent Event)
{
    switch(Key)
    {
        case 'XboxTypeS_LeftShoulder':
            if( Event == IE_Pressed )
                SelectPage(Clamp(CurrentPageNum - 1, 0, NumButtons));
            return true;
        case 'XboxTypeS_RightShoulder':
            if( Event == IE_Pressed )
                SelectPage(Clamp(CurrentPageNum + 1, 0, NumButtons));
            return true;
    }
    
    return false;
}

defaultproperties
{
    PagePadding=1.0
    BorderWidth=0.05
    ButtonAxisSize=0.08
    CurrentPageNum=-1
    PageComponentIndex=-1
}