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lua/includes/modules/widget.lua

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+--[[
+| 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/
+--]]
+
+
+
+--
+-- Widgets are like gui controls in the 3D world(!!!)
+--
+
+widgets = {}
+
+--
+-- Holds the currently hovered widget
+--
+widgets.Hovered = nil
+widgets.HoveredPos = vector_origin
+
+--
+-- Holds the current pressed widget
+--
+widgets.Pressed = nil
+
+local function UpdateHovered( pl, mv )
+
+	if ( !IsValid( pl ) ) then return end
+
+	if ( !pl:Alive() ) then
+		pl:SetHoveredWidget( NULL )
+		return
+	end
+
+	local OldHovered = pl:GetHoveredWidget()
+	pl:SetHoveredWidget( NULL )
+	
+	local eyePos = pl:EyePos()
+	local aimVector = pl:GetAimVector()
+	aimVector:Mul( 256 )
+	aimVector:Add( eyePos )
+	
+	local trace =
+	{
+		start	= eyePos,
+		endpos	= aimVector,
+		filter	= function( ent )
+
+			return IsValid( ent ) && ent:IsWidget()
+
+		end
+	}
+
+--	debugoverlay.Line( trace.start, trace.endpos, 0.5 )
+
+	widgets.Tracing = true
+	local tr = util.TraceLine( trace )
+	widgets.Tracing = false
+
+	if ( !IsValid( tr.Entity ) ) then return end
+	if ( tr.Entity:IsWorld() ) then return end
+	if ( !tr.Entity:IsWidget() ) then return end
+
+--	debugoverlay.Cross( tr.HitPos, 1, 60 )
+
+	if ( OldHovered != tr.Entity ) then
+
+		-- On hover changed? why bother?
+
+	end
+
+	pl:SetHoveredWidget( tr.Entity )
+	pl.WidgetHitPos = tr.HitPos
+
+end
+
+local function UpdateButton( pl, mv, btn, mousebutton )
+
+	local now = mv:KeyDown( btn )
+	local was = mv:KeyWasDown( btn )
+	local hvr = pl:GetHoveredWidget()
+	local prs = pl:GetPressedWidget()
+
+	if ( now && !was && IsValid( hvr ) ) then
+		hvr:OnPress( pl, mousebutton, mv )
+	end
+
+	if ( !now && was && IsValid( prs ) ) then
+		prs:OnRelease( pl, mousebutton, mv )
+	end
+end
+
+
+--
+-- The idea here is to have exactly the same
+-- behaviour on the client as the server.
+--
+function widgets.PlayerTick( pl, mv )
+
+	UpdateHovered( pl, mv )
+
+	UpdateButton( pl, mv, IN_ATTACK, 1 )
+	UpdateButton( pl, mv, IN_ATTACK2, 2 )
+
+	local prs = pl:GetPressedWidget()
+
+	if ( IsValid( prs ) ) then
+		prs:PressedThinkInternal( pl, mv )
+	end
+
+end
+
+
+---
+---  Render the widgets!
+---
+
+local RenderList = {}
+
+function widgets.RenderMe( ent )
+
+	--
+	-- The pressed widget gets to decide what should draw
+	--
+	if ( LocalPlayer() && IsValid(LocalPlayer():GetPressedWidget()) ) then
+
+		if ( !LocalPlayer():GetPressedWidget():PressedShouldDraw( ent ) ) then
+			return
+		end
+
+	end
+
+
+	table.insert( RenderList, ent )
+
+end
+
+hook.Add( "PostDrawEffects", "RenderWidgets", function()
+
+	--
+	-- Don't do anything if we don't have widgets to render!
+	--
+	if ( #RenderList == 0 ) then return end
+
+	cam.Start3D( EyePos(), EyeAngles() )
+
+		for k, v in ipairs( RenderList ) do
+
+			v:OverlayRender()
+
+		end
+
+	cam.End3D()
+
+	RenderList = {}
+
+end )
+
+
+hook.Add( "PlayerTick", "TickWidgets", function( pl, mv ) widgets.PlayerTick( pl, mv ) end )
+
+
+
+
+local ENTITY = FindMetaTable( "Entity" )
+
+function ENTITY:IsWidget()
+	return self.Widget
+end