add initial icon support + license information

system/formspec/formspec_helpers.lua

@@ -90,7 +90,8 @@ mtimer.show_formspec = function (name, def)
     local formspec = table.concat({
         'formspec_version[2]',
         'size[+width,+height]',
-        'label[0.25,0.35;+title]',
+        'image[0.25,0.2;0.3,0.3;+icon]',
+        'label[0.65,0.35;+title]',
         'box[0.25,0.6;+linewidth,0.04;#ffffff]',
         'container[0.25,+content]',
         table.concat(def.formspec, ' '),
@@ -103,6 +104,7 @@ mtimer.show_formspec = function (name, def)
         ['+height'] = height,
         ['+linewidth'] = width-0.25,
         ['+title'] = minetest.formspec_escape(prefix..def.title),
+        ['+icon'] = 'mtimer_icon_'..name:gsub('mtimer:', '')..'.png',
         ['+content'] = 0.9 + content_offset,
         ['+buttons'] = height-1,
         ['+defbutton'] = 0.25,

textures/README.md

@@ -0,0 +1,13 @@
+## License
+
+If not specified otherwise: All textures are released under CC-BY-SA 4.0 or newer.
+
+* <https://creativecommons.org/licenses/by-sa/4.0/>
+
+## Buttons and Icons
+
+All textures named `mtimer_button_*` or `mtimer_icon_*` are taken from the Tango icon library base icon theme. This base icon theme is released under Public Domain by the Tango Desktop Project at freedesktop.org.
+
+* <http://tango.freedesktop.org/Tango_Icon_Library>
+* <http://tango.freedesktop.org/Tango_Desktop_Project>
+* <https://www.freedesktop.org>