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MiniRobotLanguage (MRL)
"b"-Flag "backjump"
Search Child Window
Intention
What is the "backjump"?
It's some kind of "rollback", that is done, when a child-window is not immediately found.
If a Child-window (for example a button) is not found, there is a slight danger, that we are inside the wrong Top-Window. Because the SCW. always searches inside the current Top-Window, this behavior could lead to problems. Even if a fitting window with our button would appear, we could not grab it, because we are only searching in a previous window that had the right title.
To prevent this problem and also check new windows if they appear, the SCW.-command may initiate a so called "Backjump" to the previous STW. A Backjump means that the SCW. jumps back to the STW. and this way looks for new windows that may potentially have the button we are looking for.
The "b"-flag controls the "Backjump" behavior. It describes the backjump-time in seconds. You can specify fractions of seconds like this "0.5".
And you can completely disable the backjump, if you set the "b"-flag to a value of zero.
Short Examples:
' We use just the button caption and the backjump-flag
SCW.tb|Cancel|0
SCW.bt|0|Cancel
' Here we set the backjump to 250 ms
' all three commands do technically the same
' we have just changed the order of the parameters
SCW.ctb|Button|Cancel|250
SCW.tbc|Cancel|250|Button
SCW.btc|250|Cancel|Button
Example
'MR Script-file:
'Version:
'Purpose: STW.-Features Demo
'Author: Theo Gottwald
'Creation date: 09.12.11
'===========================================================
' In the following script we'll make three sorts of backjumps.
' Fast, slow and no backjump.
' Run it from the Editor and follow the script.
'
'#EXE:?pfad\
'#SPI:ForceWrite
'
' Close Testform if already there
CAW.PBWindowClass:0|BCS - Testform
' Wait 200 ms
PAU.0.2
' Start an Application only, if that Application
' is not yet running.
'
' We use STW here to test if the Application is already running
' in that case we jump over the EXE-command and contine.
' We use the following flags:
' w ... 0 - Set waiting time to 0 seconds
' t ... "BCS - Testform" - this is the caption text of the window we search for
' U ... "found" - jump to Label ":found" if the window already exists
' X ... continue without errormessage if the window was not found in time
'
STW.wtUX|0|BCS - Testform|found
EXE.?exepfad\Sample Apps\BSC-Testform.exe
:found
' Now we can use the Application and press Buttons
' we use the following flags:
' w ... 0 - set waiting time to zero
' t ... "BCS - Testform" - caption of the window we are looking for
STW.wt|0|BCS - Testform
'
' We use the following flags in SCW.:
'
' "c" ... "Button" - window-class (its a button control)
' "t" ... "Cancel" - text on the button we search for
' "b" ... "backjump" is set to 120 ms
' "X" - Flag - no error if not found
' "w" - set waiting time to 5 seconds
SCW.ctbXw|Button|notthere|120|5
' Just move to the button, no click.
' We make another STW. or else the Backjump would go to the STW. in Line 34
STW.wt|0|BCS - Testform
' We set the backjump now to 1 second (=1000 ms)
SCW.ctbXw|Button|notthere|1000|5
' We make another STW. or else the Backjump would go to the STW. in Line 34
STW.wt|0|BCS - Testform
' We disable the backjump now
SCW.ctbXw|Button|notthere|0|5
MBX. Ready
'-----------------------------------------------------------
ENR.
Remarks
You can specify rollback times smaller then a second. Use in that case floating point notation, like "0.25".
Limitations:
See also: