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lua/vgui/dgrid.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/
+--]]
+
+
+local PANEL = {}
+
+AccessorFunc( PANEL, "m_iCols", "Cols" )
+AccessorFunc( PANEL, "m_iColWide", "ColWide" )
+AccessorFunc( PANEL, "m_iRowHeight", "RowHeight" )
+
+function PANEL:Init()
+
+	self.Items = {}
+
+	self:SetCols( 4 )
+	self:SetColWide( 32 )
+	self:SetRowHeight( 32 )
+
+	self:SetMouseInputEnabled( true )
+
+end
+
+function PANEL:GetItems()
+
+	-- Should we return a copy of this to stop
+	-- people messing with it?
+	return self.Items
+
+end
+
+function PANEL:AddItem( item )
+
+	if ( !IsValid( item ) ) then return end
+
+	item:SetVisible( true )
+	item:SetParent( self )
+
+	table.insert( self.Items, item )
+
+	self:InvalidateLayout()
+
+end
+
+function PANEL:RemoveItem( item, bDontDelete )
+
+	for k, panel in pairs( self.Items ) do
+
+		if ( panel == item ) then
+
+			table.remove( self.Items, k )
+
+			if ( !bDontDelete ) then
+				panel:Remove()
+			end
+
+			self:InvalidateLayout()
+
+		end
+
+	end
+
+end
+
+function PANEL:PerformLayout()
+
+	local i = 0
+
+	self.m_iCols = math.floor( self.m_iCols )
+	self.m_iRowHeight = math.floor( self.m_iRowHeight )
+	self.m_iColWide = math.floor( self.m_iColWide )
+
+	for k, panel in pairs( self.Items ) do
+
+		if ( !panel:IsVisible() ) then continue end
+
+		local x = ( i % self.m_iCols ) * self.m_iColWide
+		local y = math.floor( i / self.m_iCols ) * self.m_iRowHeight
+
+		panel:SetPos( x, y )
+
+		i = i + 1
+	end
+
+	self:SetWide( self.m_iColWide * self.m_iCols )
+	self:SetTall( math.ceil( i / self.m_iCols ) * self.m_iRowHeight )
+
+end
+
+function PANEL:SortByMember( key, desc )
+
+	if ( desc == nil ) then
+		desc = true
+	end
+
+	table.sort( self.Items, function( a, b )
+
+		if ( desc ) then
+
+			local ta = a
+			local tb = b
+
+			a = tb
+			b = ta
+
+		end
+
+		if ( a[ key ] == nil ) then return false end
+		if ( b[ key ] == nil ) then return true end
+
+		return a[ key ] > b[ key ]
+
+	end )
+
+end
+
+function PANEL:Clear()
+
+	for k, panel in ipairs( self:GetChildren() ) do
+		panel:Remove()
+	end
+	self.Items = {}
+
+end
+
+derma.DefineControl( "DGrid", "A really simple grid layout panel", PANEL, "Panel" )