-- create a script resource property 'myfont' referencing a font file
go.property("mymaterial", resource.material("/example/get_set_material.material"))

function init(self)
    msg.post(".", "acquire_input_focus")

    -- get the material file on the gui component which is assigned to
    -- the material with id 'default'
    self.default_texture = go.get("#gui", "materials", { key = "default" })
end

function on_input(self, action_id, action)
    if action.pressed then
        -- get the material file currently assigned to the material with id 'default'
        local current_texture = go.get("#gui", "materials", { key = "default" })

        -- toggle between the default material and the material referenced by the
        -- script resource property 'default'
        if current_texture == self.mymaterial then
            go.set("#gui", "materials", self.default_texture, { key = "default" })
        else
            go.set("#gui", "materials", self.mymaterial, { key = "default" })
        end
    end
end