public bool OnDoubleTap(Android.Views.MotionEvent ev)
{
if (photoViewAttacher == null)
{
return(false);
}
try {
float scale = photoViewAttacher.GetScale();
float x = ev.GetX();
float y = ev.GetY();
if (scale > photoViewAttacher.GetMinimumScale())
{
photoViewAttacher.SetScale(photoViewAttacher.GetMinimumScale(), x, y, true);
}
else
{
photoViewAttacher.SetScale(photoViewAttacher.GetMediumScale(), x, y, true);
}
/*
* if (scale < photoViewAttacher.GetMediumScale()) {
* photoViewAttacher.SetScale(photoViewAttacher.GetMediumScale(), x, y, true);
* } else if (scale >= photoViewAttacher.GetMediumScale() && scale < photoViewAttacher.GetMaximumScale()) {
* photoViewAttacher.SetScale(photoViewAttacher.GetMaximumScale(), x, y, true);
* } else {
* photoViewAttacher.SetScale(photoViewAttacher.GetMinimumScale(), x, y, true);
* }*/
} catch (Java.Lang.ArrayIndexOutOfBoundsException e) {
// Can sometimes happen when getX() and getY() is called
}
return(true);
}
protected async override void OnElementPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == "IsActive" && _photoViewAttacher != null)
{
// Reset zoom scale when image gets active (visible)
_photoViewAttacher.SetScale(_photoViewAttacher.GetMinimumScale(), 0, 0, false);
}
if (e.PropertyName == "ImageName" && string.IsNullOrWhiteSpace(_view.ImageName) == false)
{
var fileSystem = new FileSystem();
var filePath = fileSystem.GetFilePath(_view.ImageName);
await InitializeRenderer(_view, filePath);
}
}
public float GetMinimumScale()
{
return(mAttacher.GetMinimumScale());
}