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    Nuklear
    
   This is a minimal-state, immediate-mode graphical user interface toolkit written in ANSI C and licensed under public domain. It was designed as a simple embeddable user interface for application and does not have any dependencies, a default render backend or OS window/input handling but instead provides a highly modular, library-based approach, with simple input state for input and draw commands describing primitive shapes as output. So instead of providing a layered library that tries to abstract over a number of platform and render backends, it focuses only on the actual UI. 
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Data Fields | |
| struct nk_style_window_header | header | 
| struct nk_style_item | fixed_background | 
| struct nk_color | background | 
| struct nk_color | border_color | 
| struct nk_color | popup_border_color | 
| struct nk_color | combo_border_color | 
| struct nk_color | contextual_border_color | 
| struct nk_color | menu_border_color | 
| struct nk_color | group_border_color | 
| struct nk_color | tooltip_border_color | 
| struct nk_style_item | scaler | 
| float | border | 
| float | combo_border | 
| float | contextual_border | 
| float | menu_border | 
| float | group_border | 
| float | tooltip_border | 
| float | popup_border | 
| float | min_row_height_padding | 
| float | rounding | 
| struct nk_vec2 | spacing | 
| struct nk_vec2 | scrollbar_size | 
| struct nk_vec2 | min_size | 
| struct nk_vec2 | padding | 
| struct nk_vec2 | group_padding | 
| struct nk_vec2 | popup_padding | 
| struct nk_vec2 | combo_padding | 
| struct nk_vec2 | contextual_padding | 
| struct nk_vec2 | menu_padding | 
| struct nk_vec2 | tooltip_padding |