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emGUI library

This C library stands for creating simple windows-like User Interfaces with Touch capability on embedded and other platforms, that has basic C runtime environment.

Key features

  • ModalDialog system
  • WindowManager system
  • Rich Callback and Event subsystem
  • flexible porting layer
  • independency from fonts and images
  • small memory footprint

Ports

This library was ported to

Widgets

At the moment we support several base widgets components

  • Widget - a base component for the UI that is used as building block for other. It provides a hierarchy for embedding widgets into each other. It also
  • Label - all-in-one solution for text output. It supports
    • Single line mode
    • Multi line mode with paging
    • Word wrapping by word
  • Plot - for simple graph plotting
  • Button - supports
    • Text Mode - simple font-based button
    • Picture Mode - add an icon to the button
    • Picture+Text Mode - add an icon + description under the icon

Components that was introduced in 1.0.0, but disabled at the moment due to unresolved dependencies

  • Console - a window that shows linux-like boot console - depends on freeRTOS queues
  • Keyboard and KeyboardRow - depends on generic int types and 320*240 screen resolution
  • PictureStack - just a list of pictures. Provides convenient picture storage place. Depends on C-Array pictures
  • ProgressBar - Acts as standalone widget and as a part of ModalDialogs. Depends on generic int types.

Windowing system

Library provides windowing system for making UI implementation more intuitive and simple

We support

  • Window - a widget-based container for other components
  • WindowManager - operates Window instances and allows to open close and pass Touch events to windows. It also supports a Window list - an instance that holds a history of opened windows, and allows you to get to the previous opened windows if you close active one.
  • StatusBar - an instance that shows current window title and provides close button to close current active window.
  • ModalDialog - a convenient subsystem that allows popping windows-like modal dialogs

Future plans

  • Port disabled widgets
  • Touchless interfaces - add some kind of focus marker and add an API to move focus around
  • Add more Widgets
  • C+ bindings or a separate fork