selecting an image with the mouse cursor by contact alone (without clicking)

[Erin]

Thank you very very much for the suggestions!



On Apr 29, 10:34 am, David McFarlane <mcfar... at msu.edu> wrote:
> Erin,
>
> Stock reminder:  1) I do not work for PST.  2) PST's trained staff
> takes any and all questions athttp://support.pstnet.com/e%2Dprime/support/login.asp, and they
> strive to respond to all requests in 24-48 hours -- this is pretty
> much their substitute for proper documentation, so make full use of
> it.  3) If you do get an answer from PST Web Support, please extend
> the courtesy of posting their reply back here for the sake of others.
>
> That said, here is my take...
>
> Basically, what Ben already said.  Inside your loop, you can get
> mouse cursor position using Mouse.GetCursorPos (see the
> MouseDevice.GetCursorPos topic in the online E-Basic Help).  For the
> test, you could use SlideState.HitTest, or PointInRect (see those
> topics in the online E-Basic Help), depending on your tastes and requirements.
>
> E.g., for just one rectangular target zone,
>
> Const  tgtName as String = "Image1"
> Dim  x as Long, y as Long
> Dim  slState as SlideState  ' for convenience
> Set slState = StimSlide.States("Default")
> Do  ' loop until mouse enters the named region
>      Mouse.GetCursorPos x, y
> Loop Until ( (slState.HitTest( x, y ) = tgtName) )
>
> Do be aware that some uses of HitTest and PointInRect include top &
> left edges as part of the rectangle, but exclude bottom & right edges
> as part of the rectangle, in case that is important to you.
>
> Since you want the loop to end when the mouse contacts any of *three*
> distinct areas, you will need to construct a somewhat more elaborate
> conditional clause than in this example, but you get the idea.  And
> if you want to allow for non-rectangular target zones then you will
> have to incorporate some kind of mask into your tests, which I leave
> as an exercise.
>
> -- David McFarlane, Professional Faultfinder
>
> At 4/29/2011 09:08 AM Friday, ben robinson wrote:
>
> >you could use a Do...Loop Until in an Inline to continuously check
> >for mouse cursor position until some condition is met, for instance
> >the cursor's x and y position both meet some requirement (ie, If x >
> >5 and x < 10 and y > 5 and y < 10 Then trial.ACC = 1, trial.RT =
> >clock.read).  does that make sense?
>
> >ben
>
> >On Thu, Apr 28, 2011 at 5:35 PM, Erin
> ><<mailto:erin.sieb... at gmail.com>erin.sieb... at gmail.com> wrote:
> >I want find out how to make an image selection happen by simply having
> >the mouse cursor contact an image, without any clicking. My experiment
> >is actually a match-to-sample task for chimpanzees using ajoystick
> >without buttons. I have successfully set up thejoystickto control
> >the mouse cursor in E-Prime, so the chimp can control the mouse cursor
> >using thejoystick. I want the chimp to be able to select an image by
> >simply contacting the image with the mouse cursor.
>
> >The experiment will have three images displayed- a sample image at the
> >top of the screen (no response if contacted), then below, 2 images:
> >one image that matches the sample (correct if contacted), and a non-
> >matching foil image (incorrect if contacted).
>
> >So, I need to figure out how to have an image selection happen by
> >contact with the mouse cursor alone, and how to designate the image
> >response as correct or incorrect. I have searched the E-Prime help,
> >and checked the forums with no luck.  I downloaded the sample
> >experiment "Response Areas For Mouse Input Sample," but I am not sure
> >how to adapt it to select an image without a click.  I am new to E-
> >Prime, and would appreciate any information. thank you.
>
> >Erin

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