The e display area modifier enables or disables a control while the v modifies shows or hides a control. The enabled or visible state of control can be changed by dynamically updating a dialog box.
The previously presented enable1.pan dialog box dynamically disables the Remove DC Offset checkbox option when the Gnormal option is selected.
// enable1.pan - enable/disable control
@dialog
// initialize parameters
{defvar("gfunc", "Grandom");defvar("nodc", 1)}
// checkbox enabled
{setvar("chkbox", gfunc=="Grandom")}
Generate Noise
Generate Function <# r w=20>~gfunc = "<{gfunc}>"~<Grandom><Gnormal>
Remove DC Offset <c e={chkbox}>~nodc=<{nodc}>~<0><1>
<L>
~menuclear
~genfunc = sprintf("%s(100, 1/100)", gfunc)
~if(nodc && chkbox, setwf(sprintf("demean(%s)", genfunc)), setwf(genfunc))
Simply changing the e modifier to v, the checkbox control becomes hidden when Gnormal option is selected.
// visable1.pan - show/hide control
@dialog
// initialize parameters
{defvar("gfunc", "Grandom");defvar("nodc", 1)}
// checkbox visible
{setvar("chkbox", gfunc=="Grandom")}
Generate Noise
Generate Function <# r w=20>~gfunc = "<{gfunc}>"~<Grandom><Gnormal>
Remove DC Offset <c v={chkbox}>~nodc=<{nodc}>~<0><1>
<L>
~menuclear
~genfunc = sprintf("%s(100, 1/100)", gfunc)
~if(nodc && chkbox, setwf(sprintf("demean(%s)", genfunc)), setwf(genfunc))
Hidden or disabled control are not evaluated when the dialog box is processed by pressing the OK button.