Handle arrow key press

QNX DEVELOPERS GUI Programming
1

i need to handle arrow key presses .
I am not sure about what callback to use.

Pt_CB_HotKey??

Pt_CB_RAW??

Can any one tell with a small example

2

Though i figured out to use Pt_CB_RAW

I try to restrict the key press to the down arrow key… I just need to take an action only when the down arrow key are pressed.

here is some code

int keycheck( PtWidget_t *pwgt, void *pvData, PtCallbackInfo_t *ptsInfo )

{


PhEvent_t *event = ptsInfo ? ptsInfo->event : NULL;
PhKeyEvent_t *keyevent = event ? (PhKeyEvent_t *)PhGetData(event):NULL;

//this handles all key presses… set it only for down

		if(event && (event->type & Ph_EV_KEY) && (keyevent->key_cap & Pk_Down))
			 printf("\n down key press");


return ( Pt_CONTINUE );
}

But when i run this code. this code prints the value on all key presses. I want to restrict the print only when down key is pressed.

Thanks

3

PhKeyEvent_t *key_ev;
key_ev = (PhKeyEvent_t *)PhGetData( cbinfo->event );

if (key_ev->key_flags & Pk_KF_Cap_Valid)
switch ( key_ev->key_cap )
{
// --------- UP ARROW -----------
case 0xF052:
if ( key_ev->key_flags & (Pk_KF_Key_Down | Pk_KF_Key_Repeat))
{
// KEY press and repeat
}
else
if ( (key_ev->key_flags & 0x0F)== 0)
{
// key unpress
}
break;
}

4

Hi
Now i just want to handle the printable keys.
I want to take just one action whenever any of the printable keys are pressed.
Is there a way to do it?
or will have to switch case for all possible cases.

Thanks