Checking for key presses

JustinJack · **Posted:** Fri Mar 16, 2012 7:56 pm

Hello everyone, can someone please get me an example of how to do the following in PB for Linux?

Code:

Repeat
    Delay(100)
Until (GetAsyncKeyState_(#VK_ESCAPE) & 32768)  = 32768 
End 1

idle · **Posted:** Fri Mar 16, 2012 9:55 pm

try this and see here
http://developer.gnome.org/gtk-tutorial/2.22/x182.html

Code:

Global gkey 

Procedure KeyPressedCallback(*widget,*event.GdkEventKey,*udata );
  gkey =  *event\keyval & $FF
  Debug PeekS(*event\string) + " " + Str(gkey)
EndProcedure   

OpenWindow(0,0,0,200,100,"keyPress")
g_signal_connect_(WindowID(0),"key_press_event",@KeyPressedCallback(),0);

Repeat 
  ev = WaitWindowEvent()
  
Until gkey = #PB_Key_Escape   

JustinJack · **Posted:** Fri Mar 16, 2012 10:08 pm

The only thing is I'm trying to do it without opening a window. Console or otherwise. Actually, It's only curiosity now. I am writing a server application for linux (my first linux app) and I was trying to decide how I was going to signal it to start, stop, or restart. What I decided to do is to have the program listen on two ports, one for internet clients and data, and one for localhost, so IT people can start it and stop it from bash. If they run the program with certain parameters, it will just send itself a command locally. I'm sure there are other ways to do it, but I don't know them yet.

Shardik · **Posted:** Tue Mar 20, 2012 12:13 pm

In idle's code example Procedure has to be changed to ProcedureC.
Otherwise you will receive the following error on pressing a key:

PB IDE wrote:

Line: 6 - Invalid memory access

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Checking for key presses

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