Setting min/max values for command attributes
From The Foundry MODO SDK wiki
A mostly useless command for the sole purpose of illustrating how limiting the user input range for a command's float attribute inside can be achieved.
import lx import lxifc import lxu.command DEFAULTVALUE = 0.0 class CmdMinMaxExample(lxu.command.BasicCommand): ''' A mostly useless command for the sole purpose of illustrating how limiting the user input range for a command's float attribute inside can be achieved. ''' def __init__(self): lxu.command.BasicCommand.__init__(self) self.dyna_Add('units', lx.symbol.sTYPE_FLOAT) def cmd_Flags(self): return lx.symbol.fCMD_MODEL | lx.symbol.fCMD_UNDO def basic_Execute(self, msg, flags): ''' The second argument to dyna_Float defines a default which is set when the attribute's argument or value was not passed in. ''' floatValue = self.dyna_Float(0, DEFAULTVALUE) lx.out(floatValue) def arg_UIHints(self, index, hints): ''' We are being passed a UIHints object which we can manipulate ''' if index == 0: hints.MinFloat(0.0) hints.MaxFloat(0.5) def cmd_DialogInit(self): ''' Here we set initial values for the attributes as they appear in the UI dialog ''' if not self.dyna_IsSet(0): self.attr_SetFlt(0, DEFAULTVALUE) ''' After the command is blessed, type minmax into the command prompt. When changing the spinner, it won't let you go higher than 0.5 or lower than 0 Also when you pass a value and inspect the Event Log history you can see that the value has been clamped accordingly. ''' lx.bless(CmdMinMaxExample, "minmax")