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.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);
}
public void SetScale(float scale)
{
mAttacher.SetScale(scale);
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Resource.Id.menu_zoom_toggle:
mAttacher.SetZoomable(!mAttacher.CanZoom());
return(true);
case Resource.Id.menu_scale_fit_center:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.FitCenter);
return(true);
case Resource.Id.menu_scale_fit_start:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.FitStart);
return(true);
case Resource.Id.menu_scale_fit_end:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.FitEnd);
return(true);
case Resource.Id.menu_scale_fit_xy:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.FitXy);
return(true);
case Resource.Id.menu_scale_scale_center:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.Center);
return(true);
case Resource.Id.menu_scale_scale_center_crop:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.CenterCrop);
return(true);
case Resource.Id.menu_scale_scale_center_inside:
mAttacher.SetScaleType(Android.Widget.ImageView.ScaleType.CenterInside);
return(true);
case Resource.Id.menu_scale_random_animate:
case Resource.Id.menu_scale_random:
Random r = new Random();
float minScale = mAttacher.GetMinimumScale();
float maxScale = mAttacher.GetMaximumScale();
float randomScale = minScale + (float.Parse(r.NextDouble().ToString()) * (maxScale - minScale));
mAttacher.SetScale(randomScale, item.ItemId == Resource.Id.menu_scale_random_animate);
ShowToast(SCALE_TOAST_STRING + " " + randomScale);
return(true);
case Resource.Id.menu_matrix_restore:
if (mCurrentDisplayMatrix == null)
{
ShowToast("You need to capture display matrix first");
}
else
{
mAttacher.SetDisplayMatrix(mCurrentDisplayMatrix);
}
return(true);
case Resource.Id.menu_matrix_capture:
mCurrentDisplayMatrix = mAttacher.GetDisplayMatrix();
return(true);
case Resource.Id.extract_visible_bitmap:
return(true);
}
return(base.OnOptionsItemSelected(item));
}