Re: Alt+Key, Panels and Mouse events

[Thomas Dickey]

On Wed, 2 Aug 2006, Sadrul H Chowdhury wrote:

> Hi.
>
> (1) I am trying to have shortcut keys like Alt+n, Alt+p etc. to trigger some
> events in my application. However, it seems the keys produce different codes
> in different terminals. For example, these are the codes I get:
>
> Key      Xterm      mrxvt/urxvt
> Alt+a    195 161      27 97
> Alt+b    195 162      27 98
> Alt+c    195 163      27 99

looks as if xterm is running in UTF-8 mode.  There are a large number of
possibilities for xterm's keyboard settings.  It can also generate the
codes you've listed for rxvt, for instance.

> What would be the best way to handle the keystrokes for all terminals? (The
> program I used is given at the end)

It depends on what you're trying to do.  Unless you specify the terminal
configuration, all you can count on is ASCII text and possibly some 
function keys.

> (2) I have several WINDOWs on screen, each on its own PANEL. I want to dump
> the contents of the screen in text/HTML format on some event. Is there a way
> I can get the contents of (row, column) without knowing what window/panel is
> being displayed at that position? I am aware of inch-family of functions.
> But they ask for a WINDOW, and I am not sure which WINDOW is on top at that
> moment at that position.

your application has to keep track of that.

> (3) To deal with mouse-events, when I click on a position, is there any way
> to know which PANEL/WINDOW is being shown at that position? This would solve
> (2) I think.

no - again, your application has to keep track of the window that 
corresponds to a given location.

> Thanks.
> Sadrul
>
> /*** CODE ***/
> #include <ncurses.h>
>
> int main()
> {
>   int key;
>
>   initscr();
>   noecho();
>
>   while ((key = getch()))
>   {
>       printf("%d ", key);
>       refresh();
>   }
>
>   endwin();
>
>   return 0;
> }
>
> /*** CODE END ***/

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net