How to collect the chars typed on screen in a char[][] ?

[zsdz]

There is the simple prog rewrite by sample2:

kernel.cpp:

#include "kernel.h"
#include <unistd.h>
#include <stdio.h>

CKernel::CKernel (void)
:	CStdlibAppStdio ("02-stdio-hello")
{
	
}

CStdlibApp::TShutdownMode CKernel::Run (void)
{
	mConsole.SetOptions(CONSOLE_OPTION_ECHO);

	int col=printf("Columns: %d\n",mScreen.GetColumns());
	int row=printf("Rows: %d\n",mScreen.GetRows());

	char editor[col][row];//I don't think char[][] is a good structure,just use it now

	char c;

	while (read(STDIN_FILENO, &c, 1) == 1 && c != 'q');//I only want use read() to block,so I can type letter on screen

	return ShutdownHalt;
}

CConsole use CONSOLE_OPTION_ICANON|CONSOLE_OPTION_ECHO by default,in this mode,the delete key works right ,but arraw key works wrong(up down left right is [A[B[C[D):

if add this line: mConsole.SetOptions(CONSOLE_OPTION_ECHO); (in raw mode),arraw key works fine,but delete key can't work(display like ?):

so is there some way to let all the key works fine,and write the key typed in char[][]?I know I shoud make a int[][] to track the movement of the mouse

Thanks!

kernel.h and main.cpp stay the same:

kernel.h:

#ifndef _kernel_h
#define _kernel_h

#include <circle_stdlib_app.h>

class CKernel : public CStdlibAppStdio
{
public:
	CKernel (void);

	TShutdownMode Run (void);
};

#endif

main.cpp:

#include "kernel.h"
#include <circle/startup.h>

int main (void)
{
	// cannot return here because some destructors used in CKernel are not implemented

	CKernel Kernel;
	if (!Kernel.Initialize ())
	{
		halt ();
		return EXIT_HALT;
	}
	
	CStdlibApp::TShutdownMode ShutdownMode = Kernel.Run ();

	Kernel.Cleanup ();

	switch (ShutdownMode)
	{
	case CStdlibApp::ShutdownReboot:
		reboot ();
		return EXIT_REBOOT;

	case CStdlibApp::ShutdownHalt:
	default:
		halt ();
		return EXIT_HALT;
	}
}

[rsta2]

CConsole in canonic mode is a line editor, you cannot move on the whole screen with it. Some special keys (e.g. cursor up and down) have no function in the line editor, but are also not filtered out. There is no buffer, which holds the character codes for all character on screen. So you cannot read them back. If you want this, you have to implement it by yourself. You should switch the console to non-canonic and non-echo mode for this purpose.

[zsdz]

Thanks.If CConsole is designed only used in canonic mode,why it has CONSOLE_OPTION_ICANON option,which is default,but I can shutdown this option?

I found this project:https://github.com/olfp/lupos, it joins lua and circle and circle-stdlib to make an 'os',it use https://github.com/philanc/ple as the editor.this project can work,but I failed build it under my environment (this project write years before,and I use the new rpi and circle libs)

it seems this project use CConsole to support https://github.com/philanc/ple, which use command stty to support raw mode:

extern "C"
int lua_conmode(lua_State* state) {
  // return previous mode                                                       
  lua_pushnumber(state, CKernel::Get()->mConsole.GetOptions());
  // The number of function arguments will be on top of the stack.              
  int args = lua_gettop(state);
  if(args > 0) {
    if(lua_isinteger(state, 1)) {
      lua_Integer arg = lua_tointeger(state, 1);
      CKernel::Get()->mConsole.SetOptions(arg);
    } else {
      const char* val = lua_tostring(state, 1);
      if(!strcmp(val, "sane")) {
	CKernel::Get()->mConsole.SetOptions(
				     CONSOLE_OPTION_ICANON|CONSOLE_OPTION_ECHO);
      }
    }
  }
  return 1;
}

[zsdz]

and it seems I can move the screen

[rsta2]

To switch off canonic mode you can use:

mConsole.SetOptions (mConsole.GetOptions () & ~CONSOLE_OPTION_ICANON);