Expression editor is available while creating procedures commands. You may fill in simple values but also fill in more complex expressions. You may use expressions while defining global variables as well, but they will be stored as simple values there. Please note, that while defining expressions, if you want to enter a string, you must use double quotes. Strings without quotes will be interpret as other objects (like eg variables).
Figure 4.2:
Example of expression edit field
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The expression edit field, depending on the context, may contain some of following buttons:
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- respectively local/global variable (click to switch). Option is available only for expression defining the name of variable to store the procedure command result. You may save the variable localy (in memory of current procedure call) or as a global variable,
- Image preview - preview the image (if only the expression evaluates to image in context of global variables),
- Select area/image - click to select image or area on screen,
- Choose point - click to choose the point on you screen,
- Display available/insert build-in functions and attributes.
krzys
2017-07-19