How can I add a vertical spacing in a `CheckboxBar`?

Question

I have an example here from the solution of @krasten 7. In this I would like some vertical spacing between the checkboxes. Any ideas?

prjs = {prj1, prj2, prj3} = RandomReal[#, 100] & /@ {1, 2, 3};
Manipulate[ListPlot[prjs[[projectNo]], Joined -> True], 
 {{projectNo, {1}}, Range[Length@prjs], ControlType -> CheckboxBar,Appearance -> 
"Vertical", ControlPlacement -> Right }]

In addition to it, I am also looking for more control options like checkbox size or relative postions. Appreciate your time. Thanks.

Answer 1

You can wrap CheckboxBar with Style using the option DefaultOptions to modify the Spacings option of Grid objects:

ClearAll[addVerticalSpace]
addVerticalSpace[vs_: .3] := 
 Style[#, DefaultOptions -> {Grid -> {Spacings -> {Automatic, vs}}}] &

Examples:

cbb = CheckboxBar[{1}, Range[4], Appearance -> "Vertical"];
Row[{cbb, 
  addVerticalSpace[] @ cbb, 
  addVerticalSpace[0] @ cbb, 
  addVerticalSpace[1] @ cbb, 
  addVerticalSpace[2] @ cbb}, 
 Spacer[20]]

prjs = RandomReal[#, 100] & /@ {1, 2, 3};
addVerticalSpace[2] @
 Manipulate[ListPlot[prjs[[projectNo]], Joined -> True], 
 {{projectNo, {1}}, Range[Length@prjs], ControlType -> CheckboxBar, 
   Appearance -> "Vertical", ControlPlacement -> Right}]

Answer 2

prjs = {prj1, prj2, prj3} =
   RandomReal[#, 100] & /@ {1, 2, 3};

To widen the spacing of the checkboxes, you can use multi-row labels with the extra rows empty.

Manipulate[
 ListPlot[prjs[[projectNo]],
  Joined -> True],
 {{projectNo, {1}, "Project\nNumber"},
  (# -> StringForm["``\n\n\n", #]) & /@
   Range[Length@prjs],
  ControlType -> CheckboxBar,
  Appearance -> "Vertical",
  ControlPlacement -> Right}]

Answer 3

You can also wrap labels with Pane and use the option ImageSize to control the vertical span of labels:

ClearAll[paneWrap]
paneWrap[vSize_: 20] := Map[# -> Pane[#, Alignment -> Center, 
   BaselinePosition -> Baseline, ImageSize -> {Automatic, vSize}] &]

Examples:

prjs = RandomReal[#, 100] & /@ {1, 2, 3};
Row[{CheckboxBar[{1}, Range[Length @ prjs], Appearance -> "Vertical"],
  CheckboxBar[{1}, paneWrap[] @ Range[Length @ prjs], Appearance -> "Vertical"],
  CheckboxBar[{1}, paneWrap[30] @ Range[Length @ prjs], Appearance -> "Vertical"]}, 
  Spacer[20]]

Manipulate[ListPlot[prjs[[projectNo]], Joined -> True], 
 {{projectNo, {1}}, paneWrap[75] @ Range[Length @ prjs],
   ControlType -> CheckboxBar, Appearance -> "Vertical", ControlPlacement -> Right}]