private void UpdateImageSize()
{
double width = croppedImage.Width;
double height = croppedImage.Height;
var isize = croppedImage.ImageSize;
double iwidth = isize.Width;
double iheight = isize.Height;
if (iheight <= 0)
{
return;
}
if (height <= 0)
{
Device.BeginInvokeOnMainThread(async() =>
{
await Task.Delay(500);
UpdateImageSize();
});
}
if (Scaled)
{
//zoomView.MinimumScale = scale;
//Debug.WriteLine($"Exit New Scale: {scale}, diff: {diff}");
return;
}
Scaled = true;
this.IsClippedToBounds = true;
var ciAspect = width / height;
var imageAspect = iwidth / iheight;
double scale = 1.0;
double pad = 0;
if (ciAspect > imageAspect)
{
scale = ciAspect / imageAspect;// width / (imageAspect * height) ;// ciAspect/imageAspect ;// width /(imageAspect/height);
pad = (width - imageAspect * height) / 2;
zoomView.CropPadding = new Thickness(pad, 0, pad, 0);
// set top/bottom padding...
}
else
{
scale = height / (width / imageAspect);// height*imageAspect/width ;// height/(width/imageAspect);
pad = (height - width / imageAspect) / 2;
// set left/right padding...
zoomView.CropPadding = new Thickness(0, pad, 0, pad);
}
var diff = Math.Abs(zoomView.Content.Scale - scale);
//Debug.WriteLine($"New Scale: {scale}, diff: {diff}");
croppedImage.AnchorX = 0.5;
croppedImage.AnchorX = 0.5;
croppedImage.TranslationX = 0;
croppedImage.TranslationY = 0;
croppedImage.Scale = scale;
//croppedImage.AnchorX = 0;
//croppedImage.AnchorX = 0;
zoomView.MinimumScale = scale;
zoomView.OnPanUpdated(zoomView, new PanUpdatedEventArgs(GestureStatus.Started, 0, 0, 0));
zoomView.OnPanUpdated(zoomView, new PanUpdatedEventArgs(GestureStatus.Running, 0, 0, 0));
zoomView.OnPanUpdated(zoomView, new PanUpdatedEventArgs(GestureStatus.Completed, 0, 0, 0));
UpdateCropSize();
zoomView.Refresh();
}
private void EndPan(AtomZoomView element, float x, float y)
{
element.OnPanUpdated(this, new PanUpdatedEventArgs(GestureStatus.Completed, 0, x, y));
_panStarted = false;
}