A flutter package which will help you to create a draggable widget that can be dragged around the screen.

Demo

Features 💚

Manually Control the position of the widget along with drags.
Automatically resizes itself when the widget changes
Highly customizable
Supports Flutter web as well

Properties 🔖

/// The widget that will be displayed as dragging widget
  final Widget child;

  /// The horizontal padding around the widget
  final double horizontalSapce;

  /// The vertical padding around the widget
  final double verticalSpace;

  /// Intial location of the widget, default to [AnchoringPosition.bottomRight]
  final AnchoringPosition initialPosition;

  /// Intially should the widget be visible or not, default to [true]
  final bool intialVisibility;

  /// The top bottom pargin to create the bottom boundary for the widget, for example if you have a [BottomNavigationBar],
  /// then you may need to set the bottom boundary so that the draggable button can't get on top of the [BottomNavigationBar]
  final double bottomMargin;

  /// The top bottom pargin to create the top boundary for the widget, for example if you have a [AppBar],
  /// then you may need to set the bottom boundary so that the draggable button can't get on top of the [AppBar]
  final double topMargin;

  /// Status bar's height, default to 24
  final double statusBarHeight;

  /// Shadow's border radius for the draggable widget, default to 10
  final double shadowBorderRadius;

  /// A drag controller to show/hide or move the widget around the screen
  final DragController dragController;

  /// [BoxShadow] when the widget is not being dragged, default to
  /// ```Dart
  ///const BoxShadow(
  ///     color: Colors.black38,
  ///    offset: Offset(0, 4),
  ///    blurRadius: 2,
  ///  ),
  /// ```

  final BoxShadow normalShadow;

  /// [BoxShadow] when the widget is being dragged
  ///```Dart
  ///const BoxShadow(
  ///     color: Colors.black38,
  ///    offset: Offset(0, 10),
  ///    blurRadius: 10,
  ///  ),
  /// ```
  final BoxShadow draggingShadow;

  /// How much should the [DraggableWidget] be scaled when it is being dragged, default to 1.1
  final double dragAnimationScale;

AnchoringPosition can be among these 4 types

enum AnchoringPosition {
  topLeft,
  topRight,
  bottomLeft,
  bottomRight,
}

How to use

Stack(
    children:[
        // other widgets...
         DraggableWidget(
            bottomMargin: 80,
            topMargin: 80,
            intialVisibility: true,
            horizontalSapce: 20,
            shadowBorderRadius: 50,
            child: Container(
              height: 100,
              width: 100,
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                color: Colors.blue,
              ),
            ),
            initialPosition: AnchoringPosition.bottomLeft,
            dragController: dragController,
          )
    ]
)

DragController Fucntionality

/// Jump to any [AnchoringPosition] programatically
void jumpTo(AnchoringPosition anchoringPosition) 

/// Get the current screen [Offset] of the widget
Offset getCurrentPosition()

/// Makes the widget visible
void showWidget()

/// Hide the widget
void hideWidget()

run the example app in the exmaple folder to find out more about how to use it.