private void OnImageLoadingImageLoading(object sender, ImageLoadingEventArgs e)
{
if (string.IsNullOrEmpty(e.FileName))
{
return;
}
var vm = ParentViewModel as ILoadImageHandler;
if (vm == null)
{
return;
}
var fileinfo = new FileInfo(e.FileName);
if (fileinfo.Exists)
{
e.IsCanceled = !vm.ValidateFileSize(fileinfo.Length);
}
}
/// <summary>
/// Image is loading in image viewer.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="ImageLoadingEventArgs"/> instance containing the event data.</param>
private void ImageViewer_ImageLoading(object sender, ImageLoadingEventArgs e)
{
// if scrolling is in progress
if (_scrollAction != ScrollAction.None)
{
ImageViewer.ImageLoading -= new EventHandler <ImageLoadingEventArgs>(ImageViewer_ImageLoading);
float autoScrollPositionX;
float autoScrollPositionY;
// autoScrollPositionX
float proportion = (float)ImageViewer.Image.Width / _previouslyFocusedImageWidth;
autoScrollPositionX = _previouslyFocusedImageAutoScrollPositionX * proportion;
// autoScrollPositionY
switch (_scrollAction)
{
case ScrollAction.MoveToNextPage:
autoScrollPositionY = 0;
break;
case ScrollAction.MoveToPreviousPage:
autoScrollPositionY = ImageViewer.Image.Height;
break;
default:
throw new Exception();
}
// set scroll of new focused image
ImageViewer.ViewerState.AutoScrollPosition = new PointF(autoScrollPositionX, autoScrollPositionY);
_scrollAction = ScrollAction.None;
}
_isPageChanging = false;
}
