Flutter, setting positioned widgets dynamically

Question

I have a UI like

Now I want to create the letters on circle by given data. I need it to be a dynamic, when letters are less, (like 3 or 4) they must be far from each other. But, when they many (10 or 12) they must fit to circle (must have dynamic size and dynamic position). The code of circle and letters -

Container(
            width: SizeConfig.devWidth! * 0.6,
            height: SizeConfig.devHeight! * 0.35,
            decoration: BoxDecoration(
              border: Border.all(color: Colors.blue),
              color: MyColors.nextButtonColor,
              shape: BoxShape.circle,
            ),
            child: Stack(
              alignment: Alignment.center,
              children: [
                Positioned(
                    top: SizeConfig.devHeight! * 0.04,
                    child: isDragging == true && isItemsDragging[0] != true
                        ? dragTargetWidget('Č', 0)
                        : draggableWord('Č', 0)),
                Positioned(
                    top: SizeConfig.devHeight! * 0.07,
                    right: SizeConfig.devWidth! * 0.1,
                    child: isDragging == true && isItemsDragging[1] != true
                        ? dragTargetWidget('É', 1)
                        : draggableWord('É', 1)),
                Positioned(
                    right: SizeConfig.devWidth! * 0.03,
                    child: isDragging == true && isItemsDragging[2] != true
                        ? dragTargetWidget('Ž', 2)
                        : draggableWord('Ž', 2)),
                Positioned(
                    bottom: SizeConfig.devHeight! * 0.07,
                    right: SizeConfig.devWidth! * 0.1,
                    child: isDragging == true && isItemsDragging[3] != true
                        ? dragTargetWidget('U', 3)
                        : draggableWord('U', 3)),
                Positioned(
                    bottom: SizeConfig.devHeight! * 0.04,
                    child: isDragging == true && isItemsDragging[4] != true
                        ? dragTargetWidget('T', 4)
                        : draggableWord('T', 4)),
                Positioned(
                    bottom: SizeConfig.devHeight! * 0.07,
                    left: SizeConfig.devWidth! * 0.1,
                    child: isDragging == true && isItemsDragging[5] != true
                        ? dragTargetWidget('Ě', 5)
                        : draggableWord('Ě', 5)),
                Positioned(
                    left: SizeConfig.devWidth! * 0.03,
                    child: isDragging == true && isItemsDragging[6] != true
                        ? dragTargetWidget('А', 6)
                        : draggableWord('А', 6)),
                Positioned(
                    top: SizeConfig.devHeight! * 0.07,
                    left: SizeConfig.devWidth! * 0.1,
                    child: isDragging == true && isItemsDragging[7] != true
                        ? dragTargetWidget('K', 7)
                        : draggableWord('K', 7)),
              ],
            ))
      ],
    ),
  ),

and my data is -

Crossword(type: "crossword", format: [
  "      š",
  "    žák",
  "      o",
  " učitel",
  "      a"
], chars: [
  "i",
  "e",
  "l",
  "a",
  "t",
  "o",
  "č",
  "k",
  "š",
  "á",
  "u",
  "ž"
], strings: {
  "škola": ["      *", "      *", "      *", "      *", "      *"],
  "žák": ["       ", "    ***", "       ", "       ", "       "],
  "učitel": ["       ", "       ", "       ", " ******", "       "]
}),

Any idea how can I achieve this? Any solution would be very useful, thanks!

see RotaryDialDelegate - it is used as a delegate: for CustomMultiChildLayout — pskink
– pskink, Commented Sep 19, 2021 at 5:09
@pskink thank you so much!!! Write your answer please, It'll be a correct answer! — Muhammet
– Muhammet, Commented Sep 19, 2021 at 6:36

Muhammet · Accepted Answer · 2021-09-19 07:37:20Z

1

Thanks to @pskink! The solution is to use RotaryDialDelegate as a delegate for CustomMultiChildLayout. Check the code below:

Container(
            width: SizeConfig.devWidth! * 0.6,
            height: SizeConfig.devHeight! * 0.35,
            decoration: BoxDecoration(
              border: Border.all(color: Colors.blue),
              color: MyColors.nextButtonColor,
              shape: BoxShape.circle,
            ),
            child: CustomMultiChildLayout(
              delegate: RotaryDialDelegate(
                  wowProv.crosswordExercises[widget.indexLevel!].chars!.length),
              children: dragLetters
            ))

answered Sep 19, 2021 at 7:37

Muhammet

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