Platypus - First Expanded widget (Editor)

home.dart

Expanded(
  child: SingleChildScrollView(
    child: Container(
      margin: EdgeInsets.all(12),
      child: Screenshot(
        controller: homeProvider.codeScreenshotController,
        child: Container(
          color: homeProvider.codeBackgroundColor,
          padding: EdgeInsets.symmetric(
            vertical: homeProvider
                .verticalPaddingBetweenCodeAndBackground,
            horizontal: homeProvider
                .horizontalPaddingBetweenCodeAndBackground,
          ),
          child: Container(
            decoration: BoxDecoration(
              boxShadow: [
                homeProvider.showShadow
                    ? BoxShadow(
                        color: Colors.black,
                        spreadRadius: 2,
                        blurRadius: 20,
                      )
                    : BoxShadow(),
              ],
              color: themeMap[homeProvider.codeHighlightTheme]
                      ['root']
                  .backgroundColor,
            ),
            padding: EdgeInsets.all(16),
            child: SingleChildScrollView(
              child: Column(
                children: <Widget>[
                  ThreeCircles(),
                  homeProvider.isPreview
                      ? Align(
                          alignment: Alignment.centerLeft,
                          child: HighlightView(
                            homeProvider
                                .codeTextEditingController.text,
                            language: homeProvider
                                .codeProgrammingLanguage,
                            theme: themeMap[
                                homeProvider.codeHighlightTheme],
                            padding: EdgeInsets.only(
                                top: 12, bottom: 12),
                            textStyle: TextStyle(
                              height:
                                  homeProvider.codeLineHeight > 0
                                      ? homeProvider.codeLineHeight
                                      : null,
                              fontSize: homeProvider.codeFontSize,
                            ),
                          ),
                        )
                      : TextFormField(
                          keyboardAppearance: Brightness.dark,
                          style: TextStyle(
                            height: homeProvider.codeLineHeight > 0
                                ? homeProvider.codeLineHeight
                                : null,
                            fontSize: homeProvider.codeFontSize,
                            color: Colors.white,
                            fontFamily: 'monospace',
                          ),
                          controller: homeProvider
                              .codeTextEditingController,
                          maxLines: 15,
                        ),
                ],
              ),
            ),
          ),
        ),
      ),
    ),
  ),
)