OpenEuphoria

Re: onKeyDown

• Posted by bobspringett <bobspringett at WANADOO.FR> Aug 16, 2000
• 456 views

Thanks very much Dan. I think that this willl explain a lot to me.
Regards
Bob
----- Original Message -----
From: Dan B Moyer <DANMOYER at PRODIGY.NET>
To: <EUPHORIA at LISTSERV.MUOHIO.EDU>
Sent: Wednesday, August 16, 2000 10:26 AM
Subject: Re: onKeyDown


> Bob,
>
> Although I'm anything but an expert, it looks to me that at least as far as
> what you've said, what you're doing is perfectly correct.  If it will help
> you debug your efforts, here's some code that demonstrates what you want; I
> included two ways to do it, one with nexted if's to allow for various
> <ctrl>key combos, and then one for just <ctrl>right arrow using "if-and"
> just
> like you did (last example overwrites the first):
>
> <tested code follows:>
>
> --  demonstrates using the arrow keys in conjunction with <control> key:
>
> include Win32Lib.ew
> without warning
>
> constant MainWin = create(Window,"Press Arrow Keys and <control>key
> together",0,0,0,400,400,0)
>
> --------------------------------------------------------------------
>
> procedure MainWin_onKeyDown ( int scanCode, int shift )
>
>
> -- first way provides for any arrow key plus <control>:
>
> -- IF CONTROL KEY PRESSED:
> if and_bits(shift,ControlMask) then  -- control key pressed
>
> --   if control key and AN ARROW KEY PRESSED:
>
> --  UP ARROW
>   if scanCode = VK_UP then
>     repaintWindow(MainWin)
>     wPuts(MainWin,"<control>up arrow")
>
> --   DOWN ARROW
>   elsif scanCode = VK_DOWN then
>    repaintWindow(MainWin)
>    wPuts(MainWin,"<control>down arrow")
>
> --   LEFT ARROW
>   elsif scanCode = VK_LEFT then
>    repaintWindow(MainWin)
>    wPuts(MainWin,"<control>left arrow")
>
> --   RIGHT ARROW
>   elsif scanCode = VK_RIGHT then
>    repaintWindow(MainWin)
>    wPuts(MainWin,"<control>right arrow")
>
>   end if
> end if
>
> -- second way uses combined if test for <control> & right arrow:
>
> if and_bits(shift,ControlMask) and scanCode = VK_RIGHT then
>    repaintWindow(MainWin)
>    wPuts(MainWin,"second way works too: <control>right arrow")
> end if
>
> end procedure
> ------------------------------------------------------------
>
> onKeyDown[MainWin] = routine_id("MainWin_onKeyDown")
>
> -----------------------------------------------------------
>
> WinMain( MainWin, Normal )
>
> <code ends>
>
> HTH,
> Dan Moyer
>
> ----- Original Message -----
> From: "bobspringett" <bobspringett at WANADOO.FR>
> To: <EUPHORIA at LISTSERV.MUOHIO.EDU>
> Sent: Tuesday, August 15, 2000 10:02 AM
> Subject: onKeyDown
>
>
> > I am trying to call a procedure using the onKeyDown(scanCode,shift)
> function . In the proc I'm using 'if and_bits(shift,ControlMask)
> > and scanCode=VK_RIGHT then'
> > "do something".
> > When holding down the CTRL +RIGHTARROW KEY nothing happens.
> > However when I hold down SHIFT CTRL ALT + RIGHTARROW KEY it works. Seems
> like I've got the ControlMask screwed up. Can someone help
> > me please.
> > Regards
> > Bob