Try moving the declaration of 'combobox' below those of the 'check_button'
widgets.
--
August Schwerdfeger
aug...@schwerdfeger.name
On Feb 25, 2017 5:11 AM, "Holger Klemm" <darkta...@multimedia4linux.de>
wrote:
> Hello,
> I need your help to correct my lua script.
> I have a darktable lua script with which I want to control via a combobox
> the
> check button.
>
> The demo script below works but generates the following error:
> demo.lua:34: attempt to index global 'check_button1' (a nil value)
> stack traceback:
> [C]: in function '__newindex'
>
>
> I have tried everything, but no script without error message.
>
> What am I doing wrong?
> Can someone give me an example how to control the check button via the
> combo
> box without error message?
>
> Many Thanks
> Holger
>
>
>
>
> local dt = require "darktable"
>
> dt.configuration.check_version(...,{4,0,0})
>
> local combobox = dt.new_widget("combobox")
> {
> label = "Combobox",
> value = 1, "Button 1 is checked", "Button 1 and 2 is checked",
> "Nothing
> is checked",
>
> changed_callback = function(selection)
> if (selection.value == "Button 1 is checked") then
> check_button1.value = true
> check_button2.value = false
> elseif (selection.value == "Button 1 and 2 is checked") then
> check_button1.value = true
> check_button2.value = true
> elseif (selection.value == "Nothing is checked") then
> check_button1.value = false
> check_button2.value = false
> end
> end
> }
>
>
> check_button1 = dt.new_widget("check_button")
> {
> label = "Button 1",
> value = true
> }
>
> check_button2 = dt.new_widget("check_button")
> {
> label = "Button 2",
> value = false
> }
>
>
> dt.register_lib(
> "demo", -- Module name
> "demo", -- name
> true, -- expandable
> false, -- resetable
> {[dt.gui.views.lighttable] = {"DT_UI_CONTAINER_PANEL_RIGHT_CENTER",
> 100}},
> -- containers
> dt.new_widget("box") -- widget
> {
> orientation = "vertical",
> combobox,
> check_button1,
> check_button2,
> },
> nil,
> nil
> )
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