As of Flutter 1.20, InteractiveViewer widget supports pan and Zoom out of the box. To make any widget zoomable you need to simply wrap the child with InteractiveViewer. @override Widget build(BuildContext context) { return Center( child: InteractiveViewer( panEnabled: false, // Set it to false to prevent panning. boundaryMargin: EdgeInsets.all(80), minScale: 0.5, maxScale: 4, child: FlutterLogo(size: … Read more
I had to add @Override public boolean dispatchTouchEvent(MotionEvent ev){ super.dispatchTouchEvent(ev); return productGestureDetector.onTouchEvent(ev); } in my Activity.
Figured it out. In my case, my UIScrollView contained a UIImage that I allowed zooming. Apparently that meant that scrolling is enabled and the UIScrollView had trouble distinguishing between gestures intended to scroll vs. swipe (next, previous image). The key in my case, is to disable scrolling in the scroll view when the image is … Read more
Here is a working sample. <html> <script type=”text/javascript”> var canvas, ctx, flag = false, prevX = 0, currX = 0, prevY = 0, currY = 0, dot_flag = false; var x = “black”, y = 2; function init() { canvas = document.getElementById(‘can’); ctx = canvas.getContext(“2d”); w = canvas.width; h = canvas.height; canvas.addEventListener(“mousemove”, function (e) { … Read more