<function name="TestHover" parent="PANEL" type="hook"> <ishook>yes</ishook> <description>Called to test if the panel is being `hovered` by the mouse. This will only be called if the panel's parent is being hovered.</description> <realm>Client</realm> <added>2020.04.29</added>⤶ <predicted>No</predicted> <args> <arg name="x" type="number">The x coordinate of the cursor, in screen space.</arg> <arg name="y" type="number">The y coordinate of the cursor, in screen space.</arg> </args> <rets> <ret name="" type="boolean">Return false when the cursor is not considered on the panel, true if it is considered on the panel. Do not return anything for default behavior.</ret> </rets> </function> <example> <description>Makes the button detect clicks as if the button was circular - not rectangular.</description> <code> concommand.Add( "testvgui1", function() local frame = vgui.Create( "DFrame" ) frame:SetSize( 300, 400 ) frame:Center() frame:MakePopup() local DermaButton = vgui.Create( "DButton", frame ) DermaButton:SetText( "Say hi" ) DermaButton:SetPos( 25, 50 ) DermaButton:SetSize( 250, 250 ) function DermaButton:DoClick( self ) chat.AddText( "Hello world" ) end function DermaButton:TestHover( x, y ) local x, y = self:ScreenToLocal( x, y ) -- Convert to local coordinates local dist = math.sqrt( (x - self:GetWide() / 2) ^ 2 + ( y - self:GetTall() / 2 ) ^ 2 ) -- Simple distance calculation return dist < math.min( self:GetWide(), self:GetTall() ) / 2 -- Return true if the cursor is within the buttons circular radius end function DermaButton:Paint( w, h ) -- Original size draw.RoundedBox( 0, 0, 0, w, h, Color( 255, 255, 255, 128 ) ) -- Circular visualization local size = math.min( w, h ) / 2 surface.DrawCircle( w / 2, h / 2, size, Color( 255, 120, 0 ) ) end end ) </code> </example>