Multiple visual events --- Use observe() or exists()?

how to repeat something: faq 1437

about observe you should first look at:
--1. http://sikuli.org/docx/region.html
--2. http://sikuli.org/docx/region.html#finding-inside-a-region-and-waiting-for-a-visual-event
--3. http://sikuli.org/docx/region.html#observing-visual-events-in-a-region

general comment:
the observer is convenient, if you want to look for visual objects in parallel and if reaction timing is the focus. But it is relatively complex to implement,because of the communication between your script and the event handlers.

To get a start it is mostly sufficient to start with a while loop, that uses exists().

example:

img1 = "some_image1.png"
img2 = "some_image2.png"
img3 = "some_image3.png"

imgstop = "some_other_image.png"
# to stop the loop, make imgstop invisible

isImg1 = False
isImg2 = False
isImg3 = False

while exists(imgstop, 0): # loop as long imgstop is visible
   if exists(img1, 0):
      isImg1 = True
   if exists(img2, 0):
      isImg2 = True
   if exists(img3, 0):
      isImg3 = True
   if not (isImg1 or isImg2 or isImg3): # no img visible?
      wait(1) # time to be adjusted
      continue # we look again
   # at this point we know which images are present
   # some code to do something depending on
   # which images exist e.g.
   if isImg1 and isImg2:
      # do something
   #prepare to loop again
   isImg1 = False
   isImg2 = False
   isImg3 = False
   wait(1) # time to be adjusted
   # we go back to loop again
# first statement after the loop

I think for up to 5 visual objects this could work rather good, especially when the search is restricted to a smaller region (e.g. app window). The second parameter 0 in exists() makes the search to come back after the first try (0.3 seconds in average) and not wait the standard 3 seconds.

You may try to convert the "if exists()" to onAppear(img, handler). The challenge would be to know inside a handler, wether one of the other events has happened meanwhile (global variables or added region attributes).

Finally: yes, the complexity of your goal needs some diving into the theoretics of Python scripting and the Sikuli API.

Have fun though ;-)

hey !

thanks for the fast answer... ill defenetly try this out asp..

i got one more little question : is it possible to do something like this:

If picture A is found, and Picture X has appeared as well - Click Picture Z

just wondering.. in general

Anyway, thanks for your advise.. ill have "dive into"

cheers

sorry think its already answerd... i ll just try

That is exactly the example I chose above:

 if isImg1 and isImg2:
      # do something

since isImgN is set before by the corresponding if exists(imgN, 0) and "# do something" would be done if img1 AND img2 exists in this moment.

Welcome to come back anytime with your questions.

hey there..

just got a bit further with my "trying to understand this"

I got one essential question:

is there a simple way to do something like:
if isimg1 and ismg2 is not

means - if u find one image but the other one is missing - do something -
in one line (so it only reacts if both of the images are found) - if not - it should skip the "do" line

If you do not need the matches later, this is your one liner (based on my first comment):

if exists(img1, 0) and not exists(img2, 0):
   #do something

Hope it helps ;-)