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Re: Constraining a NSSlider to Certain Values
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Re: Constraining a NSSlider to Certain Values


  • Subject: Re: Constraining a NSSlider to Certain Values
  • From: Jean-Daniel Dupas <email@hidden>
  • Date: Mon, 7 Apr 2008 14:46:17 +0200


Le 7 avr. 08 à 14:10, Peter Zegelin a écrit :


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:

You can get the ref window by using the -[NSView window] method. You can get the current event by using the NSApp global variable (NSEvent *event = [NSApp currentEvent];)
And see also the link in the Ron's message.


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  • Follow-Ups:
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References: 
 >Constraining a NSSlider to Certain Values (From: Peter Zegelin <email@hidden>)
 >Re: Constraining a NSSlider to Certain Values (From: Jean-Daniel Dupas <email@hidden>)
 >Re: Constraining a NSSlider to Certain Values (From: Peter Zegelin <email@hidden>)

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