Board index » cppbuilder » Forcing Modal to close

2006-04-12 10:17:01 PM
cppbuilder46
Hi,
i want to close all forms that are parent of my main form
for(int i=0;i<this->MDIChildCount;i++)
{
this->MDIChildren[i]->Close();
}
i close all the forms when a certain timer reach a value
and "locks" my aplication showing only one modal asking the
user to insert pass to "unlock" aplication..
works ok except when the aplication is locked and a modal
is showing at the moment, because when user unlocks the aplication
it starts running the code next to the modal that doesnt
exists anymore
(...)
void __fastcall TvendasFORM::BguardarClick(TObject *Sender)
{
(...)
TinfoanexaFORM *infa = new TinfoanexaFORM(this);
(..)
doing a break poing on '>>>' i can see it trys to call the
function inside the IF, Firing access memory erros
thx in advanced
 

Daniel F wrote:
until the firstone. The MDIChildren array might be rearranged.
Is there another modal form besides the password form ?
Please clarify.
Hans.
 

"Daniel F" < XXXX@XXXXX.COM >wrote in message
for(int i = MDIChildCount-1; x>=0; --i)
{
MDIChildren[i]->Close();
}
in the first place?
when they are closed. Are you actually doing that? Your code design is
dependant on the child forms sticking around after they are closed, so you
should not be freeing them at all when they close.
Gambit
 

{smallsort}

thx for your response
errors come from trying to execute code of objects that no
longer exist (firing access memory errors)
iam freeing the forms onclose event
so you
the fsMDIForm
in conclusion:
if i have only fsMDIChild forms i can close them with no
problem, when user "unlocks" application all goes smooth,
if there is a modal form showing at the moment application
is "locked" when user "unlocks" it it shows a considerable
number of access memory errors, since the CPU trys to
execute the code next to the modal call..
(...)
if(infa->ShowModal() == mrOk)
(sry iam having trouble finding the words to express
my self clear :S ) note that this modal was called
by one of the fsMDIChild that is now closed and freed.
Thx once again
Daniel F
 

"Daniel F" < XXXX@XXXXX.COM >wrote in message
current code depends on the children NOT being freed when they close. That
is why you are getting AVs - you are trying to access children that no
longer exists. You need to stop doing that completely, or else delay the
freeing until after you are absolutely sure that the children will not be
accessed anymore,. You can have the OnClose event hide the children when
they close so that the user doesn't see them anymore in the UI, but they
will still be in memory for your code to continue accessing them.
Or else simply dont allow the user to lock the application at all while any
modal forms are still active. You can loop through the TScreen::Forms array
looking for forms that have the fsModal flag in their FormState property.
before allowing itself to fully close?
Gambit