Problem: a declared property in a NSView subclass doesn't update members bound
to it (with bindings) when in a mouseDragged method.
So I have a subclass of NSView that has an ivar that I declare as a property.
In IB I have a NSTextField that I set the binding to the same variable (and I
do everything required to add the NSView, use an IBOutlet in the AppDelegate,
etc). I can confirm that the binding is connected because I set the ivar in
the initWithFrame method and the NSTextField shows that value. Also I tried
adding a button and connected it to an IBAction method, which worked fine.
But when I click and drag the mouse and attempt to update the ivar with
self.ivar within the mouseDragged (which I confirmed that it's being called),
it doesn't update the ivar. I tried also updating it in the mouseUp method and
that didn't work either.
The only thing I can think of is it has something to do with the thread that
bindings are in, which must be different that the thread that mouseDragged is
in, but I can't confirm that nor know how to deal with it. Below is my code
for my mouseDragged method. Any help would be greatly appreciated.
-(void) mouseDragged:(NSEvent *)theEvent {
NSPoint mouseLocation = [theEvent locationInWindow];
NSPoint convertedLocation = [self convertPoint:mouseLocation fromView:nil];
CGFloat difference = convertedLocation.y - dragStart;
if([theEvent modifierFlags] & NSCommandKeyMask) // command key
myDial->rotation = dragDialPos - (difference * 0.5);
else
myDial->rotation = dragDialPos - (difference * 3);
// check limits
if(myDial->rotation>= dialMaxLeft)
myDial->rotation= dialMaxLeft;
if(myDial->rotation<= dialMaxRight)
myDial->rotation= dialMaxRight;
// set the dialVal
// this assumes that the range is 300 from -150 to 150
self.dialValue = (float) (-(myDial->rotation + 150.0) / 300.0) + 1.0;
[selfsetNeedsDisplay:YES];
}
GW
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