local ConVar_RestrictFingers 	= CreateClientConVar( "finger_restrict", "1", false, false )

local PANEL = {}

local MAX_ANGLE_X = 100
local MAX_ANGLE_Y = 100

/*---------------------------------------------------------
   Name: Init
---------------------------------------------------------*/
function PANEL:Init()

	self.Value = { 0, 0 }
	self.UpdateTimer = 0
	
	// Don't update convars straight away.
	self.NextUpdate = CurTime() + 0.5
	
	// The parent will feed mouse presses to us
	self:SetMouseInputEnabled( false )

end

/*---------------------------------------------------------
   Name: PerformLayout
---------------------------------------------------------*/
function PANEL:PerformLayout()

	self:SetSize( 48, 48 )

end


/*---------------------------------------------------------
   Name: SetVarName
---------------------------------------------------------*/
function PANEL:SetVarName( _name_ )

	self.VarName = _name_

end

/*---------------------------------------------------------
   Name: SetRestrictX
   Desc: Restrict movement on the X axis.
---------------------------------------------------------*/
function PANEL:SetRestrictX( bRestrict )

	self.RestrictX = bRestrict

end

/*---------------------------------------------------------
   Name: IsRestricted
---------------------------------------------------------*/
function PANEL:IsRestricted()

	return self.RestrictX && ConVar_RestrictFingers:GetBool()

end

/*---------------------------------------------------------
   Name: GetValue
   Desc: Returns the normalized value
---------------------------------------------------------*/
function PANEL:GetValue()

	return { self.Value[1] / MAX_ANGLE_X, self.Value[2] / MAX_ANGLE_Y }

end


/*---------------------------------------------------------
   Name: UpdateConVar
---------------------------------------------------------*/
function PANEL:UpdateConVar()

	if (!self.VarName) then return end
	if ( self.NextUpdate > CurTime() ) then return end
	
	local Val = Format( "%.2f %.2f", self.Value[1], self.Value[2] )
	RunConsoleCommand( self.VarName, Val )

end

/*---------------------------------------------------------
   Name: SetValue
---------------------------------------------------------*/
function PANEL:SetValue( x, y )

	x = math.Clamp( x, -0.5, 0.5 ) * MAX_ANGLE_X	
	y = math.Clamp( y, -0.5, 0.5 ) * MAX_ANGLE_Y

	if ( self:IsRestricted() ) then x = 0 end
	
	self.Value = { x, y }

end


/*---------------------------------------------------------
   Name: OnMousePressed
---------------------------------------------------------*/
function PANEL:OnMousePressed( mousecode )

	if ( mousecode == MOUSE_RIGHT ) then 

		self:SetValue( 0, 0 )
		self:UpdateConVar()
	
	return end

	self:SetMouseInputEnabled( true )
	self:MouseCapture( true )
	self.Dragging = 1
	self:GetParent().Dragging = true
	
end

/*---------------------------------------------------------
   Name: OnMouseReleased
---------------------------------------------------------*/
function PANEL:OnMouseReleased()

	self:MouseCapture( false )
	self.Dragging = nil
	self:SetMouseInputEnabled( false )
	self:GetParent().Dragging = false
	
end

/*---------------------------------------------------------
   Name: OnCursorMoved
---------------------------------------------------------*/
function PANEL:OnCursorMoved( x, y )

	if (!self.Dragging) then return end
	
	local w = self:GetWide()
	local h = self:GetTall()
	
	self:SetValue( (x/w) - 0.5, (y/h) - 0.5 )
	self:UpdateConVar()
	
end

/*---------------------------------------------------------
   Name: Think
---------------------------------------------------------*/
function PANEL:Think()

	if ( self.UpdateTimer > CurTime() ) then return end
	self.UpdateTimer = CurTime() + 0.1

	local Value = GetConVarString( self.VarName )
	local Value = string.Explode( " ", Value )
	
	self.Value[1] = tonumber( Value[1] )
	self.Value[2] = tonumber( Value[2] )
	
end

/*---------------------------------------------------------
   Name: Paint
---------------------------------------------------------*/
function PANEL:Paint()

	local v = self:GetValue()
	
	local w = self:GetWide()
	local h = self:GetTall()
	
	//surface.SetDrawColor( 0, 0, 0, 100 )
	//surface.DrawRect( 0, 0, w, h )
	
	local x = (v[1] * w) + w/2
	local y = (v[2] * h) + h/2
	
	x = math.Clamp( x, 3, w-3 )
	y = math.Clamp( y, 3, h-3 )
	
	surface.SetDrawColor( 0, 0, 0, 250 )
	if ( self.HoveredFingerVar ) then surface.SetDrawColor( 255, 255, 255, 255 ) end
	surface.DrawLine( x, y, w/2, h/2 )
	surface.DrawRect( w/2-1, h/2-1, 2, 2 )
	surface.DrawRect( x-3, y-3, 6, 6 )
	
	surface.SetDrawColor( 255, 255, 0, 255 )
	if ( self:IsRestricted() ) then surface.SetDrawColor( 30, 180, 255, 255 ) end
	surface.DrawRect( x-2, y-2, 4, 4 )

end

vgui.Register( "FingerVar", PANEL, "Panel" )