dalosp.struct = {
    images = {
        up = iup.LoadImage "12-em-up.tga",
        down = iup.LoadImage "12-em-down.tga",
        cross = iup.LoadImage "12-em-cross.tga",
        plus = iup.LoadImage "12-em-plus.tga",
    },
    
    get_settings = function (self)
    end,
    
    configure = function (self)
        self.cfg_dlg:popup()
    end,
    
    activate = function (self)
        self.actv_dlg:show()
    end,
    
    input_change = function (self)
    end,
    
    create = function (d, tab, settings)
        tab.ninputs = 1
        tab.noutputs = 0
        tab.otype = dalos.objtype.LUA_VIEWER
        tab.configure = dalosp.struct.configure
        tab.activate = dalosp.struct.activate
        tab.input_change = dalosp.struct.input_change
        tab.get_settings = dalosp.struct.get_settings
        tab.default_name = "Struct"
        tab.ntype = "Struct"

        local extra = { }
        if not settings then settings = {} end
        
        local obj = dalos.object(d, tab, extra)
        
        local cmx = iup.matrix {}
        cmx.draw_cb = dalosp.struct.cfg_draw_cb
        
        obj.cfg_dlg = iup.dialog {
            iup.vbox {
                cmx,
                iup.hbox {
                    iup.fill {},
                    iup.button {
                        title = "Ok",
                        action = function (self) return iup.CLOSE end
                    },
                    iup.fill {},
                },
            },
        }
        
        obj.cfg_dlg.mx = cmx
        
        local amx = iup.matrix {}
        
        obj.actv_dlg = iup.dialog {
            amx,
        }
        
        return obj
    end,
}

dalos.struct = dalosp.struct.create
dalos:register_obj("Struct", dalos.struct, "Programmable")