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Description:

floating overlay

A widget wrapper that allows a floating widget be dragged and rescaled.
Features #

Floating widget on top of the screen
Resizing and repositioning the floating widget
Constrainable space to float inside the tree (optional)
Limiting borders with padding
State managment when pushing and poping screens (needs the RouteObserver for managing push)

Getting started #
Add to your pubspec.yaml file:
dependencies:
flutter:
sdk: flutter
floating_overlay: ^1.2.1
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Import the package
import 'package:floating_overlay/floating_overlay.dart';
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Usage #
Create a FloatingOverlayController
final controller = FloatingOverlayController.absoluteSize(
maxSize: const Size(200, 200),
minSize: const Size(100, 100),
start: Offset.zero,
padding: const EdgeInsets.all(20.0),
constrained: true,
);
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or
final controller = FloatingOverlayController.relativeSize(
maxScale: 2.0,
minScale: 1.0,
start: Offset.zero,
padding: const EdgeInsets.all(20.0),
constrained: true,
);
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Insert the FloatingOverlay widget inside your widget tree and give it the controller, a child and a floatingChild.
FloatingOverlay(
controller: controller,
floatingChild: SizedBox.square(
dimension: 100.0,
child: Container(
decoration: BoxDecoration(
color: Theme.of(context).primaryColor,
border: Border.all(
color: Colors.black,
width: 5.0,
),
),
),
),
child: Container(),
);
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Then use the controller to make the floating child show or hide.
controller.hide();
controller.isFloating;
controller.show();
controller.toggle();
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