Estimate Imagesize of any given Particular Control object?

Question

I make different controls(InputFields,Text,panel, etc) in my code for which the corresponding code is below.

  inputFieldValue = 10;
  (*Markers*)
  markers = Row[{
                Column[{
                MouseAppearance[
                               Style["\[FilledUpTriangle]", Bold, Black, {15,15},ShowStringCharacters -> False],
                                "LinkHand"
                                ],
                MouseAppearance[
                                Style["\[FilledDownTriangle]", Bold, Black, {15, 15}, ShowStringCharacters -> False],
                                "LinkHand"
                              ]
                       },
                      Spacings -> 0,
                      Alignment -> Center,
                      Background -> RGBColor[0.65, 0.65, 0.65]
                     ](*Column is CLosed*)
                },
               BaselinePosition -> Axis
              ];
   (*InputField*)
   field = Dynamic[Row[{InputField[
                            Dynamic[inputFieldValue],
                            Number,
                            ContinuousAction -> True,
                            ImageSize -> {50, 20},
                            Alignment -> Center
                                 ]
                        },
                        BaselinePosition -> Axis
                      ]
                   ];

I want to find exact ImageSizes of the controls for accurate placement in another grid. I am listing the options that I have with me here.

case1:

     Rasterize[markers][[2, 2]]

case2:

    Rasterize[field][[2, 2]]

and also,I arrange this controls in different formats.like,

arrange1:

 userField = Row[{
            markers,
            field
            },
        Frame -> False
        ]

arrange2:

     panelRow = 
            Panel[Row[{userField, userField, userField, userField, userField, 
                  userField, userField, userField, userField, userField
                     }], 
                  FrameMargins -> -3, Appearance -> "Frameless"
                 ]

case3:

 Rasterize[userField][[2, 2]]

case4:

Rasterize[panelRow][[2, 2]]

if you evaluate case1,the ImageSize is ({9,23}) which is wrong as I have already mentioned size of markers is {15,15}.

Based on the options provided here, I did try to use the Rasterize function with no success. My idea is to figure out the Imagesize and span them across a layout whose pixel or unit value is 10. Also, if I have an image of an odd dimension, for example, like `ImageSize -> {67, 38}, I want to set my values for the control object to next closest higher multiple of span value, which in the case of my example is {70, 40} so that my control object will not suffer due to insufficient spaces.

Yet another option that I did try was to use Options[markers] which also does not give me the value of the size of the control objects. Right now, I am putting my control objects into Pane with scroll bars to accommodate for different sizes of the control objects without compromising the size or display of the control objects.

Answer 1

I don't really know what you're trying to do here, but here's a simple observation on one of the things you're doing:

g = Rasterize[
  Style["\[FilledUpTriangle]", Bold, Black, {15, 15}, 
    ShowStringCharacters -> False]]

The [15,15} appears to be (mostly) ignored, because the resulting graphic is {9,16}.