Changing image position according to xy-coordinates from mouseclicks

[Johannes Bjerva]

David,

That makes a lot of sense!
Thanks for the tip.

Johannes

On Tuesday, 19 June 2012 17:01:18 UTC+2, McFarlane, David wrote:
>
> Johannes, 
>
> Glad you sorted it out.  Just a bit of explanation about the 
> ":center", that happens when you use an attribute reference (e.g., 
> [x]) for an X or Y Posiiton, and I do not think that PST explains 
> this anywhere.  Think about it -- When you use an attribute 
> reference, EP does not know until run time what position to use.  But 
> during design time, it still has to place the object at some example 
> position.  Where should it put the object during design time?  The 
> ":center" merely indicates where the object will appear on the 
> *design* surface, and then the object will move to the referred 
> position at *run* time. 
>
> And if you like, you could replace ":center" with a position of your 
> choice.  E.g., "[x]:25%" would place the object 25% from the left of 
> the design surface during design time, while "[x]:150" would place 
> the object 150 pixels from the left during design time, and in each 
> case would place the object at the value of [x] at run time.  Does 
> that clarify things? 
>
> --------------- 
> David McFarlane 
> E-Prime training 
> online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx 
> Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster) 
> --------------- 
>
> Stock reminder:  1) I do not work for PST.  2) PST's trained staff 
> take any and all questions at 
> http://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) In addition, PST takes questions at their Facebook page 
> (http://www.facebook.com/pages/Psychology-Software-Tools-Inc/241802160683 
> ), and offers several instructional videos there and on their YouTube 
> channel (http://www.youtube.com/user/PSTNET ) (no Twitter feed yet, 
> though).  4) If you do get an answer from PST staff, please extend 
> the courtesy of posting their reply back here for the sake of others. 
>
>
> At 6/19/2012 03:48 AM Tuesday, Johannes Bjerva wrote: 
> >I managed to solve the problem through using a global variable, 
> >which is set by the mouse coordinates, rather than an attribute. 
> >That is to say, the problem was not in the automatic addition of 
> >":center", as I first assumed. 
> > 
> >Problem solved! :) 
> > 
> > 
> >On Monday, 18 June 2012 21:53:18 UTC+2, Johannes Bjerva wrote: 
> >Hello, 
> > 
> >I am currently developing an experiment in which the participants 
> >will click an area of the screen, following which an image should 
> >appear in that location. 
> > 
> >What I have tried so far is having a slide object containing an 
> >image object. In the image object's sub-property pages I've tried to 
> >set the X and Y positions to the attributes "[PicPosX]" and 
> >"[PicPosY]". However, once I click apply, E-Prime automatically 
> >changes this to "[PicPosX]:center" and "[PicPosY]:center". 
> > 
> >In order to get the coordinates themselves, I have added this 
> >inline-code after the slide object: 
> >Dim theMouseResponseData As MouseResponseData 
> >Set theMouseResponseData = 
> CMouseResponseData(Slide1.InputMasks.Responses(1)) 
> >c.SetAttrib "PicPosX", theMouseResponseData.CursorX 
> >c.SetAttrib "PicPosY", theMouseResponseData.CursorY 
> > 
> >Obtaining the coordinates and setting the attributes seems to work 
> >perfectly, since I can see the coordinates in the resulting data files. 
> >However, the image does not change positions, but remains in the 
> >center (most likely due to E-Prime's :center-addition to my attributes). 
> > 
> >Any help in solving this problem would, of course, be greatly 
> appreciated. 
> > 
> >Kind regards, 
> >Johannes Bjerva 
>
>

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