tdk.dart

  void onDrawerButtonPressed(BuildContext _context) {
    try {
      FocusScope.of(_context).unfocus();
    } catch (e) {}
    showModalBottomSheet(
        context: _context,
        backgroundColor: Colors.transparent,
        builder: (_context) {
          return Container(
            height: MediaQuery.of(_context).size.height * .5,
            child: Container(child: _buildDrawerItem, decoration: _bottomSheetBoxDecoration),
          );
        });
  }

 Widget get _buildDrawerItem => Column(
        children: <Widget>[
          Stack(
            children: <Widget>[
              TdkCover(
                isKeyboardVisible: false,
                context: context,
                scale: 0.20,
              ),
              Center(
                child: Padding(
                  padding: EdgeInsets.only(top: MediaQuery.of(context).size.height * .14),
                  child: Column(
                    children: <Widget>[
                      Text(
                        AppConstant.appDescription,
                        style: TextStyle(fontSize: 14, color: Colors.white),
                      ),
                      Padding(
                        padding: const EdgeInsets.only(top: 10.0),
                        child: Text(
                          AppConstant.appVersion,
                          style: TextStyle(fontSize: 12, color: AppConstant.colorVersionText),
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              AppWidget.pullDown(AppConstant.colorPullDown1),
            ],
          ),
          SizedBox(
            height: 16,
          ),
          Column(
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisAlignment: MainAxisAlignment.center,
            mainAxisSize: MainAxisSize.max,
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.only(top: 16.0),
                child: MaterialButton(
                  minWidth: 328,
                  height: 48,
                  elevation: 0,
                  color: AppConstant.colorDrawerButton,
                  shape: RoundedRectangleBorder(
                    borderRadius: new BorderRadius.circular(8),
                  ),
                  child: Text(
                    AppConstant.hakkinda,
                    style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold, color: AppConstant.colorHeading),
                  ),
                  onPressed: () {
                    _onHakkindaButtonPressed();
                  },
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(top: 16.0),
                child: MaterialButton(
                  minWidth: 328,
                  height: 48,
                  elevation: 0,
                  color: AppConstant.colorDrawerButton,
                  shape: RoundedRectangleBorder(
                    borderRadius: new BorderRadius.circular(8),
                  ),
                  child: Text(
                    AppConstant.iletisim,
                    style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold, color: AppConstant.colorHeading),
                  ),
                  onPressed: () {
                    Navigator.pop(context);
                    showModalBottomSheet<dynamic>(
                      isScrollControlled: true,
                      context: context,
                      builder: (BuildContext context) {
                        return AppBottomSheetTab2();
                      },
                    );
                  },
                ),
              ),
            ],
          )
        ],
      );