Parameter blocks

Parameter blocks are used to specify the properties of a parameter. There can be any number of parameter blocks in the default section of a formula, one for every parameter. If more than one parameter block specifies settings for the same parameter, only the last setting is used.

This is the syntax of parameter blocks:

[type] param <parameter-identifier>
  <settings>
endparam

Before the param keyword, you can specify the type of the parameter (bool, int, float, complex, color, or a class name). If the type is omitted, it is deduced from the default setting. The type is required for color parameters and plug-in parameters. It is also required if you want to use an expression for the default setting.

Each setting is in the form setting = value. The following settings are available:

• caption
• default
• enabled
• enum
• expanded
• exponential
• hint
• max
• min
• selectable
• text
• visible

Example:

  Mandelbrot {  init:    z = 0  loop:    z = sqr(z) + #pixel  bailout:    |z| < @bailout  default:    title = "Mandelbrot set"    float param bailout      caption = "Bail-out value"      hint = "This is the bail-out value"      default = 4.0      min = 1      max = 256      exponential = true    endparam  }    

Note: The param keyword is also used for parameter forwards.

See Also
Function blocks
Headings
Parameters

Parameter blocks