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since it is wrong to close the builtin stream and specially note https://pubs.opengroup.org/onlinepubs/9699919799/functions/fclose.html: Since after the call to fclose() any use of stream results in undefined behavior, fclose() should not be used on stdin, stdout, or stderr except immediately before process termination (see XBD Process Termination), so as to avoid triggering undefined behavior in other standard interfaces that rely on these streams. If there are any atexit() handlers registered by the application, such a call to fclose() should not occur until the last handler is finishing. Once fclose() has been used to close stdin, stdout, or stderr, there is no standard way to reopen any of these streams. and it is also unnecessary because the stream always get flushed. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> |
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| src | ||
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Graphics / nxwm NxWM
This directory holds a tiny desktop for small embedded devices with a touchscreen,. NxWM. NxWM is true multiple window manager but only one window is displayed at a time. This simplification helps performance on LCD based products (in the same way that a tiled window manager helps) and also makes the best use of small displays. It is awkward from a human factors point-of-view trying to manage multiple windows on a small display.
The window manager consists of a task bar with icons representing the running tasks. If you touch the task's icon, it comes to the top. Each window has a toolbar with (1) a title, (2) a minimize button, and (3) a stop application button using the standard icons for these things.
There is always a start window that is available in the task bar. When you touch the start window icon, it brings up the start window containing icons representing all of the available applications. If you touch an icon in the start window, it will be started and added to the task bar.
There is a base class that defines an add-on application and an interface that supports incorporation of new application. The only application that is provided is NxTerm. This is an NSH session running in a window. You should be able to select the NX icon in the start menu and create as many NSH sessions in windows as you want. (keybard input still comes through serial).
Note 1: NwWM requires NuttX-7.19 or above to work with the current
NxWidgets-1.18 release.