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CCP4i: Graphical User Interface |
| Documentation for Programmers | |
| DefineVariable |
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DefineVariable - define the data type and initial value of an array variable
DefineVariable arrayname variable_name type initial_value
The data type and initial value of a variable are usually set in the .def file. This command will perform a similar function initialising the parameter variable_name in array arrayname so that the commands such as CreateLine have sufficient information to draw a widget such as entry field, button or menu for the parameter. The data type type should be set to something which is defined in the $CCP4I_top/etc/types.def file and an initial value initial_value must be set but can be a null string (i.e. "").
Note that only the parameters defined in a .def file are written out to another .def file if the user opts to save the current status so any parameter initialised with the DefineVariable command will NOT be saved.