import 'package:jr_extension/jr_extension.dart';

        SizeBox(
            height: 300,
            Padding(
            padding: const EdgeInsets.only(left: 5, right: 5),
            child: Text(
              'bulabula',
              style: TextStyle(
                fontWeight: FontWeight.bold,
                fontSize: 20,
              ),
            ),
          ),
      );

        Text(
          'bulabula',
        ).withStyle(fontSize: 20, fontWeight: FontWeight.bold)
         .padding(left: 5, right: 5)
         .withHeight(300),
         

///API
withAnimation<double>(
    vsync: this,///widget's state ,with TickerProviderStateMixin
    tween: Tween(begin: num, end: 300.0),
    duration: Duration(seconds: 2),
    curve: Curves.linear,
    initialValue: 0.0,
    callBack: (value, per) {
      ///[value] is the animation 's value
      ///[per] is the value of controller ，in [0,1]
    });

/// for all widgets
SizedBox withSize({double width = 0.0, double height = 0.0});
SizedBox withWidth(double width);
SizedBox withHeight(double height);
Expanded expand({int flex = 1});
DecoratedBox backgroundColor(Color color);
ClipRRect cornerRadius(double radius);
Padding padding({double top = 0.0,double left = 0.0,double bottom = 0.0,double right = 0.0});
Padding paddingAll(double padding);
Padding paddingSymmetric({double vertical = 0.0, double horizontal = 0.0});
Padding paddingTop(double top);
Padding paddingLeft(double left);
Padding paddingRight(double right);
Padding paddingBottom(double bottom);

GestureDetector onTap(VoidCallback onTap,
      {HitTestBehavior hitTestBehavior = HitTestBehavior.deferToChild});

Widget onFeedBackTap(VoidCallback onTap,
      {HitTestBehavior hitTestBehavior = HitTestBehavior.deferToChild,
      bool touchFeedBack = false});

GestureDetector onDoubleTap(VoidCallback onDoubleTap,
      {HitTestBehavior hitTestBehavior = HitTestBehavior.deferToChild});

GestureDetector onLongPress(VoidCallback onLongPress,
      {HitTestBehavior hitTestBehavior = HitTestBehavior.deferToChild});

SliverToBoxAdapter sliverBoxAdapter();

/// Example:
/// Navigator.push(context, YourPage().withCupertinoRoute());
///
CupertinoPageRoute withCupertinoRoute({bool fullscreenDialog = false});
MaterialPageRoute withMaterialRoute({bool fullscreenDialog = false});

///
/// YourWidget().tapToPushCupertinoPageRoute(context, YourPage());
///         
GestureDetector tapToPushCupertinoPageRoute(
    BuildContext context,
    Widget page, {
    bool rootNavigator = false,
    bool fullscreenDialog = false,
    Function(dynamic result) callback,
    HitTestBehavior hitTestBehavior,
  });

 GestureDetector tapToPushMaterialRoute(
    BuildContext context,
    Widget page, {
    bool rootNavigator = false,
    bool fullscreenDialog = false,
    Function(dynamic result) callback,
    HitTestBehavior hitTestBehavior,
  });

GestureDetector tapToPushNamed(
    String name,
    dynamic args,
    BuildContext context, {
    bool rootNavigator = false,
    Function(dynamic result) callback,
    HitTestBehavior hitTestBehavior,
  });


Widget visible(bool visible);
Widget opacity({@required double opacity});
Widget offset({@required Offset offset, bool transformHitTests = true});

Widget rotate(
      {@required double angle, bool transformHitTests = true, Offset origin});

Widget scale(
      {@required double scale,
      bool transformHitTests = true,
      Offset origin,
      Alignment alignment = Alignment.center});

Widget center({double heightFactor, double widthFactor});


PreferredSize preferredSize(Size size);


/// This extension works better especially for the page in PageView that will be kept alive
  /// example:
  ///  PageView.builder(itemBuilder: (BuildContext context, int index) {
  ///      return Page().keepAlive();
  ///    },);
  ///
Widget keepAlive(); 




/// useful only on Text 
Text withStyle({
    double fontSize = 14,
    FontWeight fontWeight,
    Color color,
    FontStyle fontStyle,
    Paint foreground,
    double wordSpacing,
    Color backgroundColor,
    Color decorationColor,
    TextDecoration textDecoration,
    TextDecorationStyle decorationStyle,
    double decorationThickness,
    List<Shadow> shadows,
    double letterSpacing,
    Locale locale,
    TextBaseline textBaseline,
    Paint background,
    String fontFamily,
    List<String> fontFamilyFallback,
    List<FontFeature> fontFeatures,
    String debugLabel,
    double height,
    bool inherit,
  });

/// for scrollController
animToTop();
animToBottom();
jumpToTop();
jumpToBottom();

yourWidget().withHeight(20).withWidth(20);

yourWidget().withSize(height:20,width:20);

yourWidget().paddingLeft(5).paddingRight(5);

yourWidget().padding(left: 5, right: 5);