リッチなポップアップ画面にはshowGeneralDialogが便利だった

■ 参考リンク
- https://gist.github.com/masashi-sutou/5807334b4ac814b15c2c43e92012808a
- https://api.flutter.dev/flutter/material/showDialog.html
- https://www.kikt.top/posts/flutter/dialog/dialog-2/
- https://medium.com/flutter-community/how-to-animate- dialogs-in-flutter-here-is-answer-492ea3a7262f

Transcript

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   w ݄ʹҰճɺ౔༵೔ʹʮ'MVUUFS΋͘΋ࣗ͘शࣨ
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   ελσΟϓϥεʯ Λ։࠵தͰ͢ʂ
4. ϦονͳϙοϓΞοϓը໘ͱ͸
   
5. ͜Μͳը໘ʂ
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7. ωΠςΟϰͩͱ஍ຯʹ࣮૷͕໘౗
   
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8. TIPX(FOFSBM%JBMPH Future<T> showGeneralDialog<T>({ @required BuildContext context, @required RoutePageBuilder pageBuilder, bool barrierDismissible, String barrierLabel, Color barrierColor, Duration transitionDuration, RouteTransitionsBuilder transitionBuilder, }) { // লུ }
9. ͭ·Γɺը໘ͷσβΠϯ͸ࣗ༝Ͱ
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11. ·ͱΊ
    
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