search widget flutter code example

Example 1: get position of a widget in screen flutter

extension GlobalKeyEx on GlobalKey {
  Rect get globalPaintBounds {
    final renderObject = currentContext?.findRenderObject();
    var translation = renderObject?.getTransformTo(null)?.getTranslation();
    if (translation != null && renderObject.paintBounds != null) {
      return renderObject.paintBounds
          .shift(Offset(translation.x, translation.y));
    } else {
      return null;
    }
  }
}

Example 2: flutter inhereted widget

class MyInherited extends InheritedWidget {
  const MyInherited({
    Key key,
    @required Widget child,
  }) : super(key: key, child: child);


  static MyInherited of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<MyInherited>();
  }

  //if you have properties, it should look something like:
  // bool updateShouldNotify(MyInherited old) => old.prop !== new.prop;
  
  //if you don't: 
  @override
  bool updateShouldNotify(MyInherited old) => false;
  
}

Example 3: searchQueryBuilder: (query, list) flutter

if (text.length > 1) {
  setState(() {
    tempSearchStore = _listPkh.documents.where((d) {
      if (d['nama'].toLowerCase().indexOf(text) > -1) {
        return true;
      } else if (d['alamat'].toLowerCase().indexOf(text) > -1) {
        return true;
      }
      return false;
    }).toList();
  });
} else {
  setState(() {
    tempSearchStore = _listPkh.documents;
  });
}