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SQ File Reference 107 variable _implicit When implicit declarations are enabled, all the variables appearing in handler declarations are managed by Sysquake exactly as if they had been declared explicitly in variable statements. Implicit variables cannot have the _nondumpable attribute; however, you can declare only the nondumpable variables and have a variable _implicit declaration for all other variables. Definition of constants Some numbers are used as identifiers at different places. For instance graphical objects which can be manipulated with the mouse are tagged with an identifier when they are displayed, and this identifier is used to recognize them when the user clicks them. Numeric ID can be replaced with more meaningful names with constant definitions. Constant definitions begin with the keyword define, followed by the identifier, the equal character, and the integer value or the keyword _auto. Constants defined with _auto are numbered consecutively from 1. In the example below, kGainID is 1, kDelayID is 2, etc. Example define define define define kGainID = _auto kDelayID = _auto kMassID = _auto kYMaxID = 1000 The definition is valid not only in the declaration part of SQ files everywhere an integer number could appear, but also in functions defined in function blocks. If the definition is placed inside a function block, it cannot be referenced in handler declarations. Init and Terminate Handlers The purpose of init handlers is to provide default values for the variables and the plot options. Variables are initialized with the values returned by the init handler(s); other variables (those not enumerated in the left-hand part of init handler declarations) are set to the empty array []. Initial plots are set up with commands subplots, subplotprops, subplotpos, scalesync or subplotsync, and subplotparam. By default, the first figure is displayed. The same functions can be used without any argument to retrieve the corresponding values; this is especially useful to store these settings in a data file.
