ContainerGadget without border have not background
OS: Ubuntu 18.10, Ubuntu 19.04, Linux Mint 19
Code:
If OpenWindow(0, 0, 0, 322, 150, "ContainerGadget", #PB_Window_SystemMenu | #PB_Window_ScreenCentered)
ContainerGadget(0, 8, 8, 306, 133);, #PB_Container_Raised)
ButtonGadget(1, 10, 15, 80, 24, "Button 1")
ButtonGadget(2, 95, 15, 80, 24, "Button 2")
CloseGadgetList()
SetGadgetColor(0, #PB_Gadget_BackColor, #Red)
Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow
EndIf
P.S.
Solution: Add always GtkFrame to GtkLayout