Tired of writing the same logic everytime you want to animate entrance and leaving of a widget? Or when controlling the position of a widget? Or moreover when you want to show a popup? Relax, we've got you covered 😊😊 !

Features

Popup:

• Show any widget (popup) anywhere on the screen.
• Customize entrance and leaving transitions of the popup content, as well as the durations and curves.
• Support for limiting your popup inside the visible screen area if you choose to do so.

Custom Animated Widget:

• A widget that animates, and is controllable! Specify your child widget and animations, and Voila, you've got a controllable animated widget!
• Control the animated widget from anywhere by using an animated widget controller.
• Disposing of the animation controller is taken care of for you by the widget itself.

Custom Positioned Widget:

• Why only custom animated widget? Here comes custom positioned widget! This is also controllable widget, just call the custom positioned widget controller and change the offset.
• Again, disposing is taken care of for you by the widget itself.

What Else?

• The package is tested and documented.

Coming Soon: Attach your popup to a widget and move it anywhere with this widget !

Usage

• Popup:

              final PopupController _controller = PopupController();
              _controller.create(
                context: context,
                builder: (context) {
                  return StatefulBuilder(
                    builder: (context, state) => GestureDetector(
                      onPanUpdate: (d) {
                        // 🚨🚨🚨 be careful here, if you set the child of the positioned widget to be bounded, then you must update the offset such that
                        // you discard updated offsets that are outside the "container" bounds. Because although the child will not be painted outside the 
                        // parent, but the offset will still be updated.🚨🚨🚨
                        final currentOffsetBuilder =
                            _controller.popupPositionController!.offsetBuilder;
                        _controller.popupPositionController!.offsetBuilder =
                            (Size contentSize) {
                          return (currentOffsetBuilder.call(contentSize) +
                              d.delta);
                        };
                      },
                      onTap: () {
                        setState(() {
                          if (_likes > 8) {
                            _likes = double.infinity;
                            return;
                          }
                          _likes++; // to update the normal widgets
                        });
                        state(
                            () {}); // to update the popup, because it is on the overlay (different context)
                      },
                      child: _card(),
                    ),
                  );
                },
                offsetBuilder: (size) => const Offset(500, 10),
                transitionBuilder: (child, animation) => ScaleTransition(
                  scale: animation,
                  child: child,
                ),
                canGoOffScreen: true,
              );

• Custom Animated Widget:

              final CustomAnimatedWidgetController _controller = CustomAnimatedWidgetController();
              CustomAnimatedWidget(
                child: Container(
                  color: Colors.amber,
                  child: const Text('I am Controllable Animated widget',
                      style: TextStyle(fontSize: 50)),
                ),
                controller: _controller,
                initiallyAnimating: true,
                transitionCurve: Curves.easeInOutBack,
                reverseTransitionCurve: Curves.easeInOutBack,
                transitionDuration: const Duration(milliseconds: 1000),
                reverseTransitionDuration: const Duration(milliseconds: 1000),
                transitionBuilder: (child, animation) {
                  // child is the above container
                  // return any transition here, your widget will be wrapped with it
                  return ScaleTransition(
                    scale: animation,
                    child: child,
                  );
                },
              )

• Custom Positioned Widget: See the example in the github repo for a complete working showcase example.

See examples in the github repo for full working example apps.

Notes

• This is the first release of the package, any suggestions or bug reports are welcomed in the issues section in the github repo 😃.

Additional information

You are welcome to contribute to the package. Just add a PR with the feature or fix you think will add value to the package.