On Fri, Mar 10, 2000 at 11:24:17AM -0500, John Ioannidis wrote:
> I have an application that prompts the user for some action, then spends
> about thirty seconds doing public-key-cryptography operations, and then
> responds. I'd like to have some indication on the screen that the machine
> is not dead, like a moving clockface, or a progress bar, or something. Does
> anyone have any sample code, or hints, or whatever, that they can send me?
In pilOTP, I have to compute N md4/5/ssh1 hashes; when N is large,
this can take a good number of seconds or a minute or two. The
computation is triggered by pressing a "Compute" button on the main
form, so what I do as a progress indicator is simply keep the Compute
button inverted until the computation is done. This is non-animated,
but simple to code and sort gets the idea across that the app is doing
something. It also works back to PalmOS 1.0 :)
Here's my code:
switch (event->eType)
{
case ctlSelectEvent: /* A control button was pressed and released. */
switch (event->data.ctlSelect.controlID)
{
case MainComputeButton:
/* This could get lengthy, so invert button as a wait indicator */
control = event->data.ctlSelect.pControl ;
CtlSetValue(control,true) ;
...
/* Do what it sez */
ComputeOTP() ;
/* Restore button to normal state */
CtlSetValue(control,false) ;
John
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