protected override void OnShowPicture(object sender, PictureChangedEventArgs arg)
{
base.OnShowPicture(sender, arg);
var image = arg.Picture;
var orientation = GetImageOrientation(image);
imagePathText.Content = FormatImageDescription(image, arg.Path, arg.FileDate, orientation);
switch (DisplayMode)
{
case DisplayMode.OriginalOrFit:
slideShowImage.Stretch = canImageFitScreen(image, orientation)? Stretch.None : Stretch.Uniform;
break;
case DisplayMode.OriginalOrFillCrop:
slideShowImage.Stretch = canImageFitScreen(image, orientation) ? Stretch.None : Stretch.UniformToFill;
break;
// default just ignore.
}
slideShowImage.Source = image;
imageOrientation.Angle = -(orientation ?? 0);
if (!IsLandscape(orientation))
{
var parentWindow = (FrameworkElement)Parent;
slideShowImage.Width = parentWindow.Height;
slideShowImage.Height = parentWindow.Width;
}
else
{
slideShowImage.Width = slideShowImage.Height = double.NaN;
}
}
protected override void OnShowPicture(object sender, PictureChangedEventArgs arg)
{
var picture = arg.Picture;
var angle = ((double)arg.Random(0, 2 * ViewAngle * AnglePrecision) / AnglePrecision) - ViewAngle;
var r3 = (double)arg.Random(1, int.MaxValue) / int.MaxValue;
var orientation = GetImageOrientation(picture);
var newPictureSize = getNiceSize(picture, r3, orientation);
// make point (newX,newY) becoming the center of the picture.
var newX = arg.Random(2, pageWidth) - newPictureSize.Width / 2;
var newY = arg.Random(3, pageHeight) - newPictureSize.Height / 2;
imagePathText.Content = FormatImageDescription(picture, arg.Path, arg.FileDate, orientation);
postcard.Opacity = 0;
Canvas.SetLeft(postcard, newX);
Canvas.SetTop(postcard, newY);
postcard.Size = newPictureSize;
postcard.Angle = angle - (orientation ?? 0);
postcard.Source = picture;
var rawBitmap = desaturate(viewBitmap);
currentViewBitmap.WritePixels(new Int32Rect(0, 0, rawBitmap.Width, rawBitmap.Height), rawBitmap.Data,
rawBitmap.Stride, 0);
var animation = new DoubleAnimation(0, 1, new Duration(TimeSpan.FromSeconds(2)))
{
AccelerationRatio = 0.8
};
animation.Completed += onFadeInCompleted;
postcard.Visibility = Visibility.Visible;
postcard.BeginAnimation(OpacityProperty, animation);
}
protected virtual void OnShowPicture(object sender, PictureChangedEventArgs arg)
{
}
void ISlidePage.OnShowPicture(object sender, PictureChangedEventArgs arg)
{
OnShowPicture(sender, arg);
}
void OnPictureChanged(object sender, PictureChangedEventArgs e)
{
HandleFloatingObjectChanged(e.Picture, e.Property, AutoRefresh);
}
