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From: griffin@frith.egr.msu.edu
Newsgroups: comp.sys.amiga.tech
Subject: software selecting string gadgets
Message-ID: <6425@cps3xx.UUCP>
Date: 12 Feb 90 20:44:35 GMT
Sender: usenet@cps3xx.UUCP
Reply-To: griffin@frith.egr.msu.edu ()
Organization: Michigan State University, College of Engineering
Lines: 57

In message <575@galadriel.bt.co.uk> Steve Paine writes:

>SCENARIO:
>	Five string Gadgets set up on a window.
>PROBLEM:
>	Want to be able to cycle through them one at a time, putting strings
>	in them and going on to the next one when I press return.
        [stuff deleted...]
>	How do I, by software, select a string gadget so that I can
>	type in data as if I had selected it with the mouse?

Add this code to your event processing function...

ULONG class;
APTR address;
struct IntuiMessage *message;

while(message = GetMessage(window->UserPort)) {
  class = message->Class;
  address = (struct Gadget *)message->IAddress;	/* addr of selected gadget */
  ReplyMsg(message);

  switch(class) {
    case GADGETUP:
      return(dogadget(address->GadgetID));
      break;
  }
}

Then, your gadget processing function could be something like...

dogadget(gadnum)
USHORT gadnum;
{
  switch(gadnum) {
    case 1: ActivateGadget(&Gadget2, window, NULL); break;
    case 2: ActivateGadget(&Gadget3, window, NULL); break;
    case 3: ActivateGadget(&Gadget4, window, NULL); break;
    case 4: ActivateGadget(&Gadget5, window, NULL); break;
    case 5: return(1); break;   
  }
  return(0);	        	
}

Now what you need to do is define the next-to-the-last field in your
struct Gadget definition.  This is a user definable field - the ordinal
gadget number.  This is the gadget's 'address'.  I used a 1 for Gadget1.
This will step through your gadgets with the return key.  If you click
on a gadget, the return key will continue on from there.  It is up to
you to do something with the info in the string gadgets, of course.
Using returns as I did will return a value to the original calling
function.  It can use this value to determine what to do next (continue
processing records, etc. - e.g. a '1' means that the user has finished
with string gadget #5).  Excuse my non-ANSI calls here.  ;^)
        
Dan Griffin
griffin@frith.egr.msu.edu		"We're waiting for Godot..."