On 07/04/2008, at 10:10 PM, Peter Zegelin wrote:
On 07/04/2008, at 9:07 PM, Jean-Daniel Dupas wrote:
Le 7 avr. 08 à 12:14, Peter Zegelin a écrit :
I'm trying to constrain the value of an NSSlider (while it is
being dragged) depending on the state of a modifier key and being
totally new to Cocoa am getting nowhere really fast! For a
start, I don't seem to be able to find a way to test for a
modifier key during the actual drag.
Can anyone help me here?
thanks!
Peter
To get the current modifier state during an event, -[NSEvent
modifierFlags];
And -[NSApplication currentEvent] or -[NSWindow currentEvent] to
get the current event (if you do not already have it).
OK but given, say, my own slidercell subclass, which event should I
check in and how do I get a ref to the sliders window? I'm
currently using 'continueTracking' which seems to be the right
event to override:
- (BOOL)continueTracking:(NSPoint)lastPoint at:(NSPoint)
currentPoint inView:(NSView *)controlView{
// how do I get the modifier keys here
// and set the slider to some value if say the command key is
pressed
else
// do the default thing
return [super continueTracking:lastPoint at:currentPoint
inView:controlView];
}
thanks for your help,
Peter
Hi Peter,
this post on CocoaBuilder by Shaun Wexler and the rest of the thread
will help you I think:
<http://www.cocoabuilder.com/archive/message/cocoa/2006/3/5/157994>
In my slider subclass I use both trackingRects (-mouseMoved:) and -
mouseDown: to detect modifier keys. Note the correct way to override
-mouseDown: for sliders in the above post. It's a little non-intuitive.
HTH,
Ron_______________________________________________
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