protected override Size MeasureOverride(Size availableSize)
{
if (double.IsInfinity(availableSize.Width) || double.IsInfinity(availableSize.Height))
{
return(_screenSize);
}
else
{
return(_stretch.CalculateSize(availableSize, _screenSize));
}
}
/// <summary>
/// Measures the control.
/// </summary>
/// <param name="availableSize">The available size.</param>
/// <returns>The desired size of the control.</returns>
protected override Size MeasureOverride(Size availableSize)
{
var source = Source;
var result = new Size();
if (source != null)
{
result = Stretch.CalculateSize(availableSize, source.Size, StretchDirection);
}
return(result);
}
/// <inheritdoc/>
protected override Size ArrangeOverride(Size finalSize)
{
var source = Source;
if (source != null)
{
var sourceSize = source.Size;
var result = Stretch.CalculateSize(finalSize, sourceSize);
return(result);
}
else
{
return(new Size());
}
}
public override void Render(DrawingContext context)
{
Rect rect = new Rect(0, 0, this.Bounds.Width, this.Bounds.Height);
context.FillRectangle(BackgroundBrush, rect);
var bitmap = Bitmap;
if (bitmap != null &&
bitmap.Size.Width > 0 && bitmap.Size.Height > 0 &&
rect.Width > 0 && rect.Height > 0)
{
var bmpSize = bitmap.Size;
Size size = Stretch.CalculateSize(rect.Size, bmpSize);
Rect drawRect = new Rect((rect.Width - size.Width) / 2,
(rect.Height - size.Height) / 2,
size.Width, size.Height);
context.DrawImage(bitmap, 1, new Rect(0, 0, bmpSize.Width, bmpSize.Height), drawRect);
}
base.Render(context);
}