Property is invisible stuff of the plot that can cache data. You can change its value with actions (if it is writable), and you can retrive its value with special syntax (see below) in the action expression.
There are two kinds of properties in ForeUI: Element Propery and Global Property:
Global Properties can also be separated as two types: System Property and User Defined Property:
Here's a chart that represent the relationship of the properties.
Property (can be accessed in Action Editor) |
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| Element Property (belongs to element) |
Global Propery (belongs to the whole plot) |
|
System Property (read-only) |
User Defined Property (read and write) |
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The properties can be used in fields that support expression. The way to know whether expression is supported is to check if there is a "..." button beside the field. Here's an example: