Canvas questions to load images

Corona shunyata.aishwarya at gmail.com
Sun Sep 16 18:18:01 UTC 2012 

Thank you. I had looked at the site link you've given, but it was more a 
problem of running the validation tool that was failing (although I do have 
an original Vista version). Apparently, the error I encountered is quite 
common (or so, the Microsoft user forums suggest). I however, found a 
roundabout way, which may be useful for others:  
http://download.cnet.com/Help-Explorer-Viewer/3000-6675_4-10666661.html . 
This software application works as a reader for .hlp files.

Thank you for your suggestions. Now that I have the E-Basic help showing 
up(or visible), I can at least look it up.

Corona.

On Sunday, September 16, 2012 1:43:51 PM UTC-4, J wrote:
>
>  This should help with viewing help files in Windows Vista (as a novice 
> e-basic programmer, I have to say that access to E-Basic Help is essential).
>
> http://support.microsoft.com/kb/917607
>
> J
>
> On 9/16/2012 11:36 AM, Corona wrote:
>  
> Thank you. I do not have access to the e-prime basic help, due to running 
> a Windows-Vista, 64-bit system.  .hlp files are no longer recognized by 
> Vista-32. I tried installing a tool that allows .hlp files to be read, but 
> it somehow failing. Is there a workaround to this, so I can view the 
> e-prime basic files? 
>
>  Thanks,
> Corona
>
> On Sunday, September 16, 2012 11:39:37 AM UTC-4, Peter Quain wrote: 
>>
>>  
>> I cannot think of why might else you would crave this knowledge. The 
>> documention, topic Canvas, will help understanding this code, you will need 
>> to if it is Canvas that you wish to use
>>
>> At 01:31 AM 17/09/2012, you wrote:
>>
>> Thank you Alphonse, for the quick reply. More for the purpose of 
>> understanding the code, than anything else, why do you repeat  cnvs.Copy 
>> offScreenCnvs, myRect, myrect (with myrect twice)? More specifically, how 
>> is this understood by e-prime? Also, I am guessing I do not have to include 
>> a slideobject?
>>
>>
>>
>> On Sunday, September 16, 2012 10:59:26 AM UTC-4, alphonse wrote:
>>  
>> -----------------------------------------------
>>  'Prepare stimulus offscreen
>>  offScreenCnvs.LoadImage stim
>>
>>  'Define the copy area
>>  Dim myRect As Rect
>>  myRect.Left = xMargin
>>  myRect.Right = xMargin + 60
>>  myRect.Top = yMargin
>>  myRect.Bottom = yMargin + 60
>>
>>  'Copy prepared stimulus to screen
>>  cnvs.Copy offScreenCnvs, myRect, myRect
>>  
>> --------------------------------------------------------------------------
>>
>>  At 12:39 AM 17/09/2012, you wrote:
>>
>> I am currently running a dot probe task with visual paired stimuli 
>> (positive, negative). I have a two fold question pertaining to this task:
>>
>>  1) I have about 60 images in one of my trialprocs, and was therefore 
>> advised to use the canvas option to preload images. I have had little 
>> success with using this object, particularly because I do not entirely 
>> understand the concepts of off-screen and on-screen canvas. I have managed 
>> to write a small script with help from the references guides posted on the 
>> e-prime website (as well as forums), but am stuck when it comes to the 
>> following statement:
>>
>>  1.      When preparing the trial:
>>
>>   
>>
>>  targetCanvas.LoadImage stim 
>>
>>   
>>
>>  Image is loaded to the top left corner. We need to define 2 Rect 
>> Objects: StimLoadRect and StimRect (see Rect object in the E-Basic Help), 
>> both the size of the images to-be-loaded, but the StimRect at the 
>> (Left,Right, Top,Bottom) coordinates where the stimulus will be displayed. 
>> When we copy the image from the offline canvas to the online canvas, we 
>> will copy from StimLoadRect to StimRect.
>>
>>   
>>
>>  2.      To run the stimulus:
>>
>>   
>>
>>  Display.WaitForVerticalBlank
>>
>>  c.setAttrib "StimOnset", clock.read
>>
>>  cnvs.copy targetCanvas, stimLoadRect, stimRect
>>
>>  sleep(stimDuration)
>>
>>  Display.WaitForVerticalBlank
>>
>>  Cnvs.clear ' or something else that erases the stimulus, can be done in 
>> the following trial
>>
>>   
>>
>>  Bolded lines: How do I create a stimLoadRect and stimRect image, a is 
>> asked for? (I did find a script for creating a rect object, but am unsure 
>> of how to specify dimensions).
>>
>>  I assume that pre-defining images and their locations, means I do not 
>> have to specify them as a SlideObject? (I am guessing I am completely wrong 
>> here - please feel free to correct me) . I would also assume that the 
>> stimDuration, must be defined as an attribute? 
>>
>>   
>>
>>  Assuming I do not have to go through this convoluted path, I have 
>> another question. If I could pre-load using the SlideImage and ImageDisplay 
>> options, I am not sure how to specify the co-ordinates of where I want my 
>> image to be in the properties section. I know this appears elementary, but 
>> the actual size of the images are 424 X 283, but when running, part of the 
>> images are cut off. When I looked at the properties of my slide object, I 
>> had set the width at 25% . I assumed this was the co-ordinate location in 
>> relation to the actual screen size. Guessing that this was an error on my 
>> part, I reset the width to 100%, but that meant that when I looked at the 
>> slideobject (with the dotted grid), one image seemed to complete cover the 
>> other image. How do I fit both images, and make sure their dimensions 
>> remain the same?
>>
>>
>>  I apologize for this rant. I only recently switched to e-prime from 
>> using Inquisit, and am still trying to get a hang of this software tool.
>>  
>>
>> Thanks a ton for your reply,
>>  
>> Corona
>>
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