Get single keystroke?

[Lars Holowko]

On Mon, Mar 21, 2011 at 1:33 PM, Sean Eskapp <eatingstaples at gmail.com> wrote:
> Is there a way to get a single keystroke in D2? Any method I've tried requires
> pushing Enter before the stroke is registered.
>

Hi Sean,

what you want to do is OS dependent.

I needed something similar ('press key to continue')

e.g.: for Windows

import core.sys.windows.windows;

bool kbHit() {
	// inspired by
http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1045691686&id=1043284392
	HANDLE stdIn = GetStdHandle(STD_INPUT_HANDLE);
	DWORD saveMode;

	GetConsoleMode(stdIn, &saveMode);
	SetConsoleMode(stdIn, ENABLE_PROCESSED_INPUT);

	bool ret = false;

	if (WaitForSingleObject(stdIn, INFINITE) == WAIT_OBJECT_0) {
		uint num;
		char ch;

		ReadConsoleA(stdIn, &ch, 1, &num, cast(void *) 0L);
		ret = true;
	}
	
	SetConsoleMode(stdIn, saveMode);
	return ret;
}

void wait_for_key() {
	writeln("\nPress any key to continue");
	while (!kbHit())
		{}
}


for Linux/Unix something like
http://www.linuxquestions.org/questions/programming-9/kbhit-34027/
should work.

Hope that helps,

Lars