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david_vickers's avatar
david_vickers
Occasional Contributor
5 years ago

Waiting for OCR checkpoint to appear as screen loads

I'm using a OCR checkpoint to wait for a Citrix application and display a login prompt.  When the window appears there's a brief loading screen that displays before the login prompt that I'm using th...
Checkpoints
Keyword Tests
  • david_vickers's avatar
    david_vickers
    5 years ago

    AlexKaras  Discovered the reason for the "Invalid Text" error.  When selecting the parameters in the Keyword test area, for setting the parameter I was using a String type instead of Object type.  The solution from the support site actually works really well for me. The only issue with it is that it's a infinite loop, so I modified the sample code and used a for loop instead to emulate a 10 second timeout (I could also pass another parameter for the seconds) 

     

    function CheckTextContents(textToSearch)
{
  // Recognize the text contents of the specified onscreen object (Citrix window)
  var text = OCR.Recognize(Aliases.wfica32.wndTransparentWindowsClient).FullText;
  // Search for the occurrence of the specified substring in the recognized text
  return (aqString.Find(text, textToSearch, 0, false) > -1)
}
function WaitForText(textToWait)
{
  for (x = 0; x < 10; x++) { 
    if (! CheckTextContents(textToWait))
      Delay(1000);
    else
      break;
  }
}

     

     

     

AlexKaras's avatar
AlexKaras
Champion Level 3

Hi,

 

> When I run the test, I get a "Type Mismatch" error on the following line

> var text = OCR.Recognize(anObject).FullText;

I would either split the second line of code into two lines (in order to figure out whether it is .Recognize() or .FullText that fails) or put a breakpoint on this line and try to use the Evaluate dialog to check that anObject contains correct value and that OCR.Recognize(anObject) returns correct recognized text.

 

david_vickers's avatar
david_vickers
Occasional Contributor
5 years ago

AlexKaras  Discovered the reason for the "Invalid Text" error.  When selecting the parameters in the Keyword test area, for setting the parameter I was using a String type instead of Object type.  The solution from the support site actually works really well for me. The only issue with it is that it's a infinite loop, so I modified the sample code and used a for loop instead to emulate a 10 second timeout (I could also pass another parameter for the seconds) 

 

function CheckTextContents(textToSearch)
{
  // Recognize the text contents of the specified onscreen object (Citrix window)
  var text = OCR.Recognize(Aliases.wfica32.wndTransparentWindowsClient).FullText;
  // Search for the occurrence of the specified substring in the recognized text
  return (aqString.Find(text, textToSearch, 0, false) > -1)
}
function WaitForText(textToWait)
{
  for (x = 0; x < 10; x++) { 
    if (! CheckTextContents(textToWait))
      Delay(1000);
    else
      break;
  }
}

 

 

 

  • BenoitB's avatar
    BenoitB
    Community Hero
    5 years ago

    Beware that your function WaitForText could return without information in case of no text apparation within the 10 seconds.

     

     

    function WaitForText(textToWait, timeout = 10000) {
  startTimer = Win32API.GetTickCount();
  maxTimer   = startTimer + timeout;
  while (Win32API.GetTickCount() < maxTimer) {
    if (CheckTextContents(textToWait))
      return true;
    aqUtils.Delay(250)
  }
  return false;
}

     

     

  • AlexKaras's avatar
    AlexKaras
    Champion Level 3
    5 years ago

    Hi,

     

    > I was using a String type instead of Object type.

    And this may be solved with the help of eval() (or evaluate() whatever is supported by the script language your project is based on) function.

    Like this:

    function CheckTextContents(textToSearch)
    {

      var obj = eval("Aliases.wfica32.wndTransparentWindowsClient");


      // Recognize the text contents of the specified onscreen object (Citrix window)
      var text = OCR.Recognize(obj).FullText;
      // Search for the occurrence of the specified substring in the recognized text
      return (aqString.Find(text, textToSearch, 0, false) > -1)
    }

     

    Just a hint... 😉