Re: Constraining a NSSlider to Certain Values
Re: Constraining a NSSlider to Certain Values
- Subject: Re: Constraining a NSSlider to Certain Values
- From: Peter Zegelin <email@hidden>
- Date: Mon, 7 Apr 2008 22:10:28 +1000
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_______________________________________________
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