private void StartOpacityAnimations(VisualImage visualImage)
{
var batch = visualImage.ForegroundVisual.Compositor.CreateScopedBatch(CompositionBatchTypes.Animation);
var opacityAnimation = visualImage.ForegroundVisual.Compositor.CreateScalarKeyFrameAnimation();
opacityAnimation.InsertKeyFrame(0f, 0f);
opacityAnimation.InsertKeyFrame(1f, 1f);
opacityAnimation.Duration = TimeSpan.FromMilliseconds(400);
var visual = ElementCompositionPreview.GetElementVisual(visualImage);
visual.StartAnimation(nameof(Visual.Opacity), opacityAnimation);
var opacityHideAnimation = _floatingVisual.Compositor.CreateScalarKeyFrameAnimation();
opacityHideAnimation.InsertKeyFrame(0f, 1f);
opacityHideAnimation.InsertKeyFrame(1f, 0f);
opacityHideAnimation.Duration = TimeSpan.FromMilliseconds(400);
_floatingVisual.StartAnimation(nameof(Visual.Opacity), opacityHideAnimation);
batch.Completed += (sender, args) =>
{
ElementCompositionPreview.SetElementChildVisual(_hostFrame, null);
_floatingVisual?.Dispose();
_floatingVisual = null;
};
batch.End();
}
public void AttachVisual(VisualImage visualImage)
{
if (_floatingVisual == null)
{
throw new InvalidOperationException("No floating visual set");
}
visualImage.ImageLoaded += VisualImageOnImageLoaded;
visualImage.ImageUri = _floatingVisualUri;
visualImage.Opacity = 0;
}
void UpdateImageQuick(int firstSymbol, int lastSymbolExclusive)
{
var clipRect = new Rectangle(0, 0, VisualImage.Size.Width, VisualImage.Size.Height);
int[] imagePixels;
using (VisualImage.LockPixels(out imagePixels))
{
Parallel.For(firstSymbol, lastSymbolExclusive,
index =>
{
var cellX = index % ColumnsCount;
var cellY = index / ColumnsCount;
var point = new Point(cellX * CellSize, cellY * CellSize - VerticalShift);
if (index >= Controller.AvailableSymbols.Count)
{
SymbolsPainter.PaintSymbol(' ', imagePixels, VisualImage.Size, point, clipRect, PlainFontColor, PlainBackground);
}
else
{
var symbolSelectionPair = Controller.AvailableSymbols[index];
var highlight = cellX == HighlightedCell.X && cellY == HighlightedCell.Y;
int background, fontColor;
if (symbolSelectionPair.Value)
{
background = highlight ? HighlightedSelectedBackground : SelectedBackground;
fontColor = highlight ? HighlightedSelectedFontColor : SelectedFontColor;
}
else
{
background = highlight ? HighlightedPlainBackground : PlainBackground;
fontColor = highlight ? HighlightedPlainFontColor : PlainFontColor;
}
SymbolsPainter.PaintSymbol(symbolSelectionPair.Key, imagePixels, VisualImage.Size, point, clipRect, fontColor, background);
}
});
}
}
public void DetachVisual(VisualImage source)
{
if (_floatingVisual != null)
{
throw new InvalidOperationException("A floating visual is already in use");
}
_floatingVisual = source.ForegroundVisual.Compositor.CreateSpriteVisual();
_floatingVisual.Size = source.ForegroundVisual.Size;
_floatingVisual.Brush = source.ForegroundVisual.Brush;
// Determine the offset from the host to the source element used in the transition
var coordinate = source.TransformToVisual(_hostFrame);
var position = coordinate.TransformPoint(new Point(0, 0));
// Set the sprite to that offset relative to the host
_floatingVisual.Offset = new Vector3((float)position.X + source.ForegroundVisual.Offset.X,
(float)position.Y + source.ForegroundVisual.Offset.Y, 0);
_floatingVisualUri = source.ImageUri;
// Set the sprite as the content under the host
ElementCompositionPreview.SetElementChildVisual(_hostFrame, _floatingVisual);
}
private static void ToggleHorizontalAlignment(VisualImage visualImage)
{
switch (visualImage.ImageHorizontalAlignment)
{
case HorizontalAlignment.Left:
visualImage.ImageHorizontalAlignment = HorizontalAlignment.Center;
break;
case HorizontalAlignment.Center:
visualImage.ImageHorizontalAlignment = HorizontalAlignment.Right;
break;
case HorizontalAlignment.Right:
visualImage.ImageHorizontalAlignment = HorizontalAlignment.Left;
break;
case HorizontalAlignment.Stretch:
visualImage.ImageHorizontalAlignment = HorizontalAlignment.Left;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
