How to implement zoom effect

[reddeath1]

onPanDown: (details) {},
onPanEnd: (details) {},
onTapCancel: () {},
onDoubleTapDown: (details) => {},
onDoubleTap: () => {};

how to use those

I was able to implement it to actual pdf pages but when the flip happens when the user flip forward it happen faster then when flip left you need to be slow for the flip to complete sometimes it fails in the end.
how to make it faster like flipping forward.

https://pasteboard.co/YzJjVuounoYh.jpg

[shivbo96]

@reddeath1 I got your concern and I will make the changes, wait for new update

[reddeath1]

I was able to make it work with the intended features.. but I would love to see your work for better improvement.
here what I have used..

GestureDetector(
          behavior: HitTestBehavior.opaque,
          onScaleStart: (details) {
            _previousScale = _scale;
            _previousOffset = details.focalPoint;
          },
          onScaleUpdate: (details) {
            setState(() {
              _scale = _previousScale * details.scale;
              _offset += details.focalPoint - _previousOffset;
              _previousOffset = details.focalPoint;
            });
          },
          onTapDown: (details) {},
          onTapUp: (details) {},
          onDoubleTapDown: (details) => doubleTapDetails = details,
          onDoubleTap: () => {},
          onHorizontalDragCancel: () => _isForward = null,
          onHorizontalDragUpdate: (details) => _turnPage(details, dimens),
          onHorizontalDragEnd: (details) => _onDragFinish(),
          child: Transform.translate(
            offset: _offset,
            child: Transform.scale(
              scale: _scale,
              child: Stack(
                fit: StackFit.expand,
                children: <Widget>[
                  if (pages.isNotEmpty) ...pages else ...[const SizedBox.shrink()],
                ],
              ),
            ),
          ),
        )