px4_autopilot/NxWidgets

NXWidgets

=========



In order to better support NuttX based platforms, a special graphical user

interface has been created called NXWidgets. NXWidgets is written in C++

and integrates seamlessly with the NuttX NX graphics subsystem in order

to provide graphic objects, or "widgets," in the NX Graphics Subsystem



Some of the features of NXWidgets include:



o Conservative C++



  NXWidgets is written entirely in C++ but using only selected “embedded

  friendly” C++ constructs that are fully supported under NuttX. No

  additional C++ support libraries are required.



o NX Integration



  NXWidgets integrate seamlessly with the NX graphics system. Think of the

  X server under Linux … the NX graphics system is like a tiny X server

  that provides windowing under NuttX. By adding NXWidgets, you can support

  graphics objects like buttons and text boxes in the NX windows and toolbars.



o Small Footprint



  NXWidgets is tailored for use MCUs in embedded applications. It is ideally

  suited for mid- and upper-range of most MCU families. A complete NXWidgets

  is possible in as little as 40Kb of FLASH and maybe 4Kb of SRAM.



o Output Devices



  NXWidgets will work on the high-end frame buffer devices as well as on LCDs

  connected via serial or parallel ports to a small MCU.



o Input Devices



  NXWidgets will accept position and selection inputs from a mouse or a

  touchscreen. It will also support character input from a keyboard such as a

  USB keyboard. NXWidgets supports on very special widget called CKeypad that

  will provide keyboard input via an on-screen keypad that can be operated

  via mouse or touchscreen inputs.



o Many Graphic Objects



  Some of the graphic objects supported by NXWidgets include labels, buttons,

  text boxes, button arrays, check boxes, cycle buttons, images, sliders,

  scrollable list boxes, progress bars, and more.



Note:  Many of the fundamental classed in NxWidgets derive from the Antony

Dzeryn's "Woopsi" project: http://woopsi.org/ which also has a BSD style

license.  See the COPYING file for details.