Hello Kevin,

There are several cases. Disable controls that are responsible for interaction
with thread; create new dialog window where show
the process of performing thread and etc.

K> I am would like to start making my programs more responsive by
K> introducing threading.
K> My programs perform reasonable size db queries and builds large
K> treeviews etc.  I know how to create thread and set them off etc,
K> which
K> leaves the GUI nice and responsive for the user.
K> However, this also means that they might do something that affects
K> the thread, like clearing the treeview, or trying to start another
K> query while that is running.  I would say that to start off I would
K> like to stop the user doing ANYTHING while, say, a db query  was
K> running.
K>
K> What is the best way to achieve this?  One way would be to have a
K> global variable called boolBUSY, then every time the user tries to do
K> something it first checks this variable before continuing.  The only
K> think about this way is that you have to put in in every event
K> handler which seems a bit clunky.  Or, similarly, you could check
K> that the cursor is not an hourglass but this gives the same problem.
K>
K> Is there a way to ignore certain user input (keyboard, mouse click
K> etc)?
K>
K> The Eclipse Java IDE brings up a little dialog box that says
K> something along the lines of 'System busy, cannot interupt', which
K> seems reasonable.
K>
K> Any pointers would be greatfully received.
K> Thanks
K> Kevin
---
WBR,
Michael  Nemtsev :: blog: http://spaces.msn.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

You could show a modal dialog box, possibly containing a progress bar
or something to notify the user about what's going on. Or just disable
all the relevant controls on the main form.

Mattias