You need to use a period when referencing a structure member from event.
If you had declared it as a pointer you could have then used ->
If you declare it like this
EventType event;
then you have to use this to reference eType
event.eType
If you declare it like this
EventType *event;
then you have to use this to reference eType
event->eType
-----Original Message-----
From: Allen Yang <[EMAIL PROTECTED]>
To: '[EMAIL PROTECTED]' <[EMAIL PROTECTED]>
Date: Wednesday, September 01, 1999 10:37 AM
Subject: RE: How to stop infinite loop by push button or some other ways?
>Kevin:
>Thank you for your help with my problem. I made some changes, and tried to
>get out the loop by pushing "done" button. However, I got some strange
>errors. Would you mind give me some advice for this.
>while (runLoop)
>{
>..............
>if (EvtEventAvail())
>{
> EventType event;
> EvtGetEvent(&event, 0);
>
> if (event->eType == ctlSelectEvent)
> {
> if (event->data.ctlEnter.controlID == buttonID_ldu_done)
> runLoop = 0;
> }
>}
>FrmGotoForm(formID_main); // loop done; goto main form
>}
>I got five different kinds of errors.
>First one, In if (event->eType == ctlSelectEvent) statement, Error is
>pointer/array required. I basically use the same statement (in ldu_handler
>function). I don't understand why it is wrong here? Another one is in if
>(event->data.ctlEnter.controlID == buttonID_ldu_done) statement, Error is
>';' expected. I don't know why I need put ';' after if statement. Third one
>is in runLoop = 0 statement, error is that not an lvalue. What is lvalue?
>Why I need lvalue here for runLoop? Fourth one is in
>FrmGotoForm(formID_main)statement, error is that declaration syntax error.
I
>also used the same statement as before. Why compiler gave me error here?
>The last one is for "}", declaration syntax error.
>
>Thank you for your time and help.
>
>Allen
>-----Original Message-----
>From: Kevin O'Keefe [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, August 31, 1999 5:01 PM
>To: '[EMAIL PROTECTED]'
>Subject: RE: How to stop infinite loop by push button or some other
>ways?
>
>
>In your loop you'll have to check for and get any events on the event queue
>in order to know that the button was pressed. Since you didn't show the
>code in your loop, I assume that you are not currently doing that.
>
>Something like this:
>
>while(loop)
>{
> // do your stuff...
>
> if(EvtEventAvail())
>
> EventType event;
> EvtGetEvent(&event, 0);
> // process event
>
> if(event == your button)
> loop = false;
> }
>}
>
>Hope this helps,
>Kevin
>
>> -----Original Message-----
>> From: Allen Yang [mailto:[EMAIL PROTECTED]]
>> Sent: Tuesday, August 31, 1999 1:30 PM
>> To: [EMAIL PROTECTED]
>> Subject: How to stop infinite loop by push button or some other ways?
>>
>>
>> Hi,
>> I have a question here. I built an application for
>> downloading data from
>> another device. In the application, I created an infinite
>> loop for getting
>> data all the time unless the user push "done" button in order
>> to terminate
>> the loop and finish downloading. I did the following steps
>> for making "done"
>> button work. However, when I tested it, it didn't do
>> anything. The infinite
>> loop was still running.
>>
>> I declare runLoop as varible to handle button.
>> char runLoop = 0;
>>
>> In the form handler function,
>>
>> static Boolean ldu_handler(EventPtr event)
>> { // handles the events within the ldu form
>> FormPtr form;
>> UInt handled = 0;
>> UInt index;
>> VoidHand RecHandle;
>> Ptr RecPointer;
>>
>>
>> form = FrmGetActiveForm();
>>
>> .............
>> //Here I ste up controlID for "done" button.
>> case ctlSelectEvent:
>> if (event->data.ctlEnter.controlID==
>> buttonID_ldu_done)
>> { // if user pushes the done
>> button, return to
>> main form
>> runLoop = 0;
>> FrmGotoForm(formID_main);
>> handled = 1;
>> }
>> break;
>> .............
>> return handled;
>> }
>>
>> In the main function, I had the loop in the function
>>
>> static void do_channel()
>> {
>>
>> runLoop = 1; //I set runLoop =1 so i can start
>> download date. if
>> runLoop = 0, downloading shall stop.
>> //Handle_Old_MF_Data();
>> while (runLoop)
>>
>> ...............
>> }
>>
>> }
>>
>>
>> Any advice will very appreciated.
>>
>> Allen
>>
>
