Re: [solved] How to catch all mouse clicking (or avoid multiple click filtering in startTrackingAt)

FROM : Joan Lluch (casa)
DATE : Fri Apr 25 21:13:48 2008

Ken, you're Genius !!

Overriding the mouseDown method of a subclassed control containing 
the cell and passing to its 'super' an identical NSEvent with 
clickCount always 1 did it !

Thank you for your help, I really appreciate it

Joan

El 25/04/2008, a las 09:02, Ken Thomases escribió:

> On Apr 25, 2008, at 1:29 AM, Joan Lluch (casa) wrote:

>> I have implemented a NSButtonCell subclass in the usual way to 
>> catch mouse tracking. I get the startTrackingAt and stopTracking 
>> messages called correctly on the first click of the mouse. However 
>> the startTrackingAt is not quickly called again if I quickly click 
>> again the mouse, such as if I did a double click. I mean, if I 
>> perform a double or triple click I only get one pair of 
>> startTrackingAt and stopTracking calls instead of the desired two 
>> or three pairs. So the desired behaviour is to be able to catch 
>> all the mouse clicking activity in almost real time. What I get 
>> instead is some filtering of the actual mouse clicking. This is 
>> the way I implemented the methods

>
> I'm guessing that this "filtering" is being done in -[NSControl 
> mouseDown:].  That is, if [theEvent clickCount] is greater than 
> one, it doesn't invoke the cell's 
> trackMouse:inRect:ofView:untilMouseUp: method.
>
> You can try subclassing the NSControl in question (presumably an 
> NSButton?), overriding mouseDown:, and passing a different object 
> to [super mouseDown:aDifferentEvent].  You can either create a new 
> NSEvent whose properties are all the same as theEvent, or you can 
> wrap theEvent in a proxy object which forwards all messages 
> faithfully except clickCount, which it intercepts to always return 1.
>
> Good luck,
> Ken