Dear Cocoa users,
I'm trying to implement view switching based on the view switching example
in Hillegass. I have a main window with a box that contains other views.
The following method, in the view controller class for the main window,
switches the views contained in the box and resizes the box to fit the new
view.
-(void)displayViewController:(NSViewController *)vc
{
//Try to end editing
NSWindow *w = [box window];
BOOL ended = [w makeFirstResponder:w];
if(!ended) {
NSBeep();
return;
}
NSView *v = [vc view];
//Compute the new window frame
NSSize currentSize = [[box contentView] frame].size;
NSSize newSize = [v frame].size;
float deltaWidth = newSize.width - currentSize.width;
float deltaHeight = newSize.height - currentSize.height;
NSRect windowFrame = [w frame];
windowFrame.size.height += deltaHeight;
windowFrame.origin.y -= deltaHeight;
windowFrame.size.width += deltaWidth;
//Clear the box for resizing
[box setContentView:nil];
[w setFrame:windowFrame
display:YES
animate:YES];
//Put the view in the box
[box setContentView:v];
}
I have a routine that I want to run after the view is finished switching and
all the UI elements for the new view are loading. The trouble I'm having is
that if I call a routine after calling displayViewController to change the
view things happen in this order:
1. The main window and the box resize to fit the view I am swapping in but
after the resizing is complete, the box is empty and none of the UI elements
(e.g label, progress bar, etc...) contained in the new view are visible.
2. The routine I call after displayViewController runs.
3. The UI elements of the new view become visible.
I need to find a way to swap the order of steps 2 and 3.
I have tried using the awakeFromNib in the view controller for the new view
but any code I put in the awakeFromNib method of the new view's view
controller also runs before the UI elements of the new view become visible.
Using the debugger I have noticed that the UI elements only appear after
control reaches [NSApplication -run] near the top of the call stack (pardon
me if that sentence did not make sense, I am a mechanical engineer by
training).
I would like to know if there is any way I can receive a notification after
the UI elements in the view are visible so that I can wait until that
happens before running a routine.
I would be very grateful for any insight on this problem.
Thanks,
Alec
Alec M. Stewart
President
Velocitek - Performance Training Tools
Web: www.velocitek.com
Toll free USA & Canada: 1-800-693-1610
Australia: 02-8006-8949 ex. 1
Worldwide: +1-(650)-362-0499 ex. 1
Fax: +1-(650)-618-2679
Skype: alec_stewart
Address: 271B Kahiko Street, Paia, HI, 96779, USA
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