wnsrc/lua/entities/widget_base.lua

--[[
| This file was obtained through the combined efforts
| of Madbluntz & Plymouth Antiquarian Society.
|
| Credits: lifestorm, Gregory Wayne Rossel JR.,
| 	Maloy, DrPepper10 @ RIP, Atle!
|
| Visit for more: https://plymouth.thetwilightzone.ru/
--]]


AddCSLuaFile()

DEFINE_BASECLASS( "base_anim" )

ENT.Spawnable = false
ENT.AdminOnly = false
ENT.RenderGroup = RENDERGROUP_TRANSLUCENT
ENT.Widget = true

-- This appears to be unused in the base game, but leaving it in case someones does
ENT.Materials = {}

function ENT:SetupDataTables()

	self:NetworkVar( "Float", 0, "SizeVar" ) -- Size (bounds)
	self:NetworkVar( "Float", 1, "Priority" ) -- Priority above other widgets (clicks, visually)

end

--
-- Unfilled, for override. Self explanatory.
-- Called on both client and server in multiplayer
-- Only on the server in singleplayer.
--
function ENT:OnClick( ply ) end
function ENT:OnRightClick( ply ) end
function ENT:PressedThink( pl, mv ) end
function ENT:PressedShouldDraw( widget ) return true end
function ENT:PressStart( pl, mv ) end
function ENT:PressEnd( pl, mv ) end
function ENT:DragThink( pl, mv, dist ) end

--
-- Set our dimensions etc
--
function ENT:Initialize()

	self:SetCollisionGroup( COLLISION_GROUP_WORLD )
	self:DrawShadow( false )
	self:EnableCustomCollisions()
	self.Color = Color( 0, 255, 255 )
	self.Color_Hover = color_white

	if ( SERVER ) then
		self:SetSize( 4 )
		self:SetPriority( 1 )
	end

end

function ENT:GetSize()
	return self:GetSizeVar()
end

function ENT:SetSize( size )

	if ( self:GetSize() == size ) then return end

	self:SetSizeVar( size )
	self:SetSolid( SOLID_BBOX )
	self:SetCollisionBounds( Vector( size, size, size ) * -0.5, Vector( size, size, size ) * 0.5 )

end

function ENT:GetGrabPos( Pos, Forward )

	local fwd = Forward
	local eye = Pos

	local planepos = self:GetPos()
	local planenrm = ( eye - planepos ):GetNormal()

	return util.IntersectRayWithPlane( eye, fwd, planepos, planenrm )

end

function ENT:PressedThinkInternal( ply, mv )

	--
	-- TODO: We should find out why this happens instead of just preventing it!
	--
	if ( !istable( ply.WidgetMove ) ) then
		ply.WidgetMove = {}
		ply.WidgetMove.EyePos = ply:EyePos()
		ply.WidgetMove.EyeVec = ply:GetAimVector()
	end

	local OldPos = self:GetGrabPos( ply.WidgetMove.EyePos, ply.WidgetMove.EyeVec )
	local NewPos = self:GetGrabPos( ply:EyePos(), ply:GetAimVector() )

	if ( NewPos && OldPos ) then

		local dist = self:WorldToLocal( OldPos ) - self:WorldToLocal( NewPos )

		if ( dist:Length() > 0.01 && dist:Length() < 512 ) then
			self:DragThink( ply, mv, dist )
		end

	end

	self:PressedThink( ply, mv )

	-- Store the (new) old eye positions
	ply.WidgetMove.EyePos = ply:EyePos()
	ply.WidgetMove.EyeVec = ply:GetAimVector()

end

--
-- Called by widget's Tick hook when a mouse button was
-- pressed while hovering over this widget
--
function ENT:OnPress( ply, iButton, mv )

	if ( self.Pressed ) then return end

	ply:SetPressedWidget( self )

	ply.WidgetMove = {}
	ply.WidgetMove.EyePos = ply:EyePos()
	ply.WidgetMove.EyeVec = ply:GetAimVector()

	self:PressStart( ply, mv )

end

--
-- Called by widget's Tick hook when a mouse button was
-- released while this widget is pressed
--
function ENT:OnRelease( ply, iButton, mv )

	ply:SetPressedWidget( NULL )
	ply.WidgetMove = nil
	self:PressEnd( ply, mv )

	--
	-- The player has to click and release on the widget
	-- or we assume they clicked and changed their mind
	-- so dragged off.. like people do sometimes.
	--
	if ( ply:GetHoveredWidget() != self ) then return end

	--
	-- Left Mouse
	--
	if ( iButton == 1 ) then
		self:OnClick( ply )
	end

	--
	-- Right Mouse
	--
	if ( iButton == 1 ) then
		self:OnRightClick( ply )
	end

end

function ENT:IsHovered()
	return LocalPlayer():GetHoveredWidget() == self
end

function ENT:SomethingHovered()
	return IsValid( LocalPlayer():GetHoveredWidget() )
end

function ENT:IsPressed()
	return LocalPlayer():GetPressedWidget() == self
end

function ENT:Draw()

	widgets.RenderMe( self )

end

function ENT:OverlayRender()

	local col = Color( 0, 0, 50, 255 )

	if ( self:IsHovered() ) then
		col = Color( 20, 50, 100, 255 )
	elseif ( self:SomethingHovered() ) then
		-- less alpha
	end

	if ( self:IsPressed() ) then

		col = Color( 180, 180, 50, 255 )

		if ( LocalPlayer():GetHoveredWidget() == LocalPlayer():GetPressedWidget() ) then
			col = Color( 255, 255, 100, 255 )
		end

	end

	local vSize = Vector( self:GetSize(), self:GetSize(), self:GetSize() )

	render.SetColorMaterialIgnoreZ()
	render.DrawBox( self:GetPos(), self:GetAngles(), -vSize, vSize, ColorAlpha( col, 0.8 ) )

	render.SetColorMaterial()
	render.DrawBox( self:GetPos(), self:GetAngles(), -vSize, vSize, col )

end

function ENT:TestCollision( startpos, delta, isbox, extents )

	if ( isbox ) then return end
	if ( !widgets.Tracing ) then return end

	-- TODO. Actually trace against our cube!

	return {
		HitPos = self:GetPos(),
		Fraction = 0.5 * self:GetPriority()
	}

end