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gui construction - How can I get "custom" controls to appear and behave like "default" controls in my Manipulate?



For various reasons I need to define some controls in my Manipulate with complex behaviors that are not (or at least I don't think can be) accomplished using the simple default syntax for Manipulate controls.


Thanks to some answers here, I have controls that support thee behaviors, but



  • I can't get them to appear in my Manipulate aligned and labeled like the default controls, and

  • one of the controls does not update its displayed value when I click on it.


For example with


Manipulate[
 Row@start,
 {{r2, "q", "R2"}, {"p", "m", "q", "y", "z"}, ControlType -> SetterBar, Appearance -> "Palette"},

 {{r3, "z", "Label R3"}, {"p", "m", "q", "y", "z"}, ControlType -> SetterBar, Appearance -> "Palette"},

 {{r4, "-"}, ControlType -> None},
 Row[{
   SetterBar[
    Dynamic[r4, If[# != "-", n = 4; start = Take[Join[start, {"A"}], n], n = 3; start = Take[start, n]] &],
    {"\[Beta]", "\[Gamma]", "-"},
    Appearance -> "Palette"]
 }],


 Column[{Dynamic[pop /@ Range[n] // Row, TrackedSymbols :> {n}]}], {x,None}, {n, None}, {start, None},

 Initialization :> (pop[i_] := With[{j = i}, PopupMenu[Dynamic[start[[j]]], CharacterRange["A", "Z"], ImageSize -> {45, 19}]]; start = ConstantArray["A", 3]; n = 3;)

 ]

I get



in which




  • the controls for r4 and the popup menus lack labels and do not align with the other (default style) controls, and

  • the r4 control does not reflect changes in the value of the variable.


How can I get these "custom" controls to appear and behave correctly in my Manipulate?



If there's a solution that uses "default" Manipulate control specification that I'm missing, that would be great, as would a solution that allows me to specify define and reuse a custom control (I have several that are similar to the popup control in that they involve several popups).



Answer



I do not understand everything the code is suppose to do, but passing the control as a pure function inside a variable declaration might give the desired behavior. The other change is the variable-setting function in the Dynamic for r4 was changed to actually set the value of r4 upon an update.


Manipulate[
 Row@start,

 {{r2, "q", "R2"}, {"p", "m", "q", "y", "z"}, 
  ControlType -> SetterBar, Appearance -> "Palette"},
 {{r3, "z", "Label R3"}, {"p", "m", "q", "y", "z"}, 
  ControlType -> SetterBar, Appearance -> "Palette"},
 {{r4, "-"}, 
  Row[{SetterBar[
      Dynamic[r4, 
       If[(r4 = #) != "-", n = 4; start = Take[Join[start, {"A"}], n],
          n = 3; start = Take[start, n]] &], {"\[Beta]", "\[Gamma]", 
       "-"}, Appearance -> "Palette"]}] &},

 {n, Column[{Dynamic[pop /@ Range[n] // Row, 
      TrackedSymbols :> {n}]}] &},
 {x, None}, {start, None},
 Initialization :> (pop[i_] := 
    With[{j = i}, 
     PopupMenu[Dynamic[start[[j]]], CharacterRange["A", "Z"], 
      ImageSize -> {45, 19}]]; start = ConstantArray["A", 3]; n = 3;)]

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