PA_GetKey

version 2003

PA_GetKey (params) → char

The routine PA_GetKey returns the ASCII code (depending on default settings or on previous calls to PA_UseAnsiCharacters or PA_UseMacCharacters ) the area received when the user presses a key, at eAE_KeyDown event.

This routine must be called when PA_GetAreaEvent returns eAE_KeyDown . Otherwise, it returns 0 and PA_GetLastError returns eER_BadEventCall .

Fill a buffer with the keys pressed, until the buffer is full or "@" (ASCII 64) is pressed.

   // The global buffer. We must use a global buffer between 2 calls,
   // our local variables are cleared. We usually use a buffer stored in
   // the area reference (see PA_Get/SetAreaReference)
   char   gBuffer[256];
   short   gBufferSize = 0;
   /* . . . some code . . . */
   
   void UserHitsKey (PA_PluginParameters params)
   {
      char   key = PA_GetKey(params);
      if( (PA_GetLasterror() == eER_NoErr) && key )
      {
         gBuffer[ gBufferSize++ ] = key;
         gBuffer[gBufferSize] = (char) 0; // null terminated string
 
   // Do something with the buffer if necessary
   // (assuming DoWithBuffer resets gBufferSize)
         if( (gBufferSize == 256) || (key == 64) )
            DoWithBuffer( gBuffer );
      }
   }

Create and use an external area , PA_GetClick .

Use PA_GetLastError to see if an error occurred ( eER_BadEventCall )