On Feb 18, 2008, at 16:59, Mei Fang Liau wrote:
I wrote a controller class inherited from NSObject, which contains
a outlet
with the main window (NSWindow) as the destination. This outlet is
used to
scan the main window's subviews and find all check boxes and store
them in
an array. Can I also do the same thing with a controller inherited
from
NSView? On the main window there are some check boxes and a custom
view. I
would like to change the color of my custom view according to the
check
boxes' status. But I find out that I can't likewise just set an
Outlet for
this subclass of NSView and scan the content of the main window... can
anyone give me some suggestion? (or what tutorial I should check
out...
there are just too many functionalities I am lost :o)
You don't need to scan for checkboxes.
You create a checkbox matrix by adding a checkbox and then resizing
it with the Option key pressed. Then you connect the checkbox to some
action in your controller, e.g. changeSelection:. Each time the user
change the selection, your action is called and can check the state
and change the custom view color.
If you have multiple checkboxes groups, you either have an outlet for
each, or keep the state in some other way in your controller and
update it when the user makes a change.
Your controller can look like this:
@interface MyController : NSObject
{
IBOutlet NSButton *checkboxMatrix;
IBOutlet MyView *colorView;
}
- (IBAction)changeSelection:(id)sender;
@end
@implementation MyController
- (IBAction)changeSelection:(id)sender;
{
// check sender state and update the view
[view setColor:[NSColor redColor]];
[view setNeedsDisplay:YES];
}
@end
Warning: compiles in Mail.app
Best Regards,
Nir Soffer
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