NSWindow delegate messages question
Hi, All,
I'm rather new in Cocoa development, so I have some misunderstanding after
API manuals reading. In particular I have a popup panel, opened by a button
click in the main window:
- (IBAction) btnClick:(id)sender {
[popupPanel showWindow];
}
I'd like to launch some process (no matter what exactly, it will work in
different thread) as soon this popup panel will appear on screen. Of
course, I could launch this process from within the same click handler
above, but I believe it will be better to do it all in the
WindowController's module, related to the popup panel. My question is: what
window delegate message should I use? Will it be OK to use
windowDidBecomeKey message or should I use windowDidExposed? Or whatever
else?
Another question is what notification could I use to display an alert box,
appearing _after_ this popup window will disappear from screen? For example,
I have a Cancel button on this popup panel, which should terminate the
launched process and (as a result of NSTask termination notification) panel
should be closed. For the sake of simplicity let's imagin, we're closing the
panel by button directly:
- (IBAction) btnCancelClick:(id)sender {
[[self window] close];
}
My question is: what window delegate message should I use to show an
NSAlert, in order my alert box would appear on screen already _after_ hiding
of the popup panel? As far as I can see, there is no windowDidClosed
message, but there is only windowWillClose. Is there any easy solution here?
Thanks in advance.
Best regards,
Alexander
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Re: NSWindow delegate messages question
On 18/12/2009, at 10:12 PM, Alexander Bokovikov wrote:
I'd like to launch some process (no matter what exactly, it will work in
different thread) as soon this popup panel will appear on screen. Of course,
I could launch this process from within the same click handler above, but I
believe it will be better to do it all in the WindowController's module,
related to the popup panel. My question is: what window delegate message
should I use? Will it be OK to use windowDidBecomeKey message or should I use
windowDidExposed? Or whatever else?
Another question is what notification could I use to display an alert box,
appearing _after_ this popup window will disappear from screen? For example,
I have a Cancel button on this popup panel, which should terminate the
launched process and (as a result of NSTask termination notification) panel
should be closed. For the sake of simplicity let's imagin, we're closing the
panel by button directly:
- (IBAction) btnCancelClick:(id)sender {
[[self window] close];
}
My question is: what window delegate message should I use to show an NSAlert,
in order my alert box would appear on screen already _after_ hiding of the
popup panel? As far as I can see, there is no windowDidClosed message, but
there is only windowWillClose. Is there any easy solution here?
There is an easy solution - do it in your window controller. Since it is
responsible for opening and closing the windows, it knows when to cause these
other events as well. I wouldn't use window activation or key notifications
since that relates purely to its appearance which likely as not has nothing to
do with your logic as such - the window coming up and going away are further
effects of this logic, not its causes.
--Graham
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