//public static void DisplayGlobalCentered(this MultiScaleImage msi)
//{
// msi.DisplayGlobalCentered(1, true);
//}
//priavte static void DisplayGlobalCentered(this MultiScaleImage msi, int nbVirtualWith, bool goBegin)
//{
// Rect subImageRect = msi.GetGloblaRect(nbVirtualWith);
// double num = msi.ActualWidth / msi.ActualHeight;
// Point point;
// if (goBegin)
// point = new Point((subImageRect.X - (msi.ViewportWidth / 2.0)) + (subImageRect.Width / 2.0), (subImageRect.Y - ((msi.ViewportWidth / num) / 2.0)) + (subImageRect.Height / 2.0));
// else
// point = new Point(msi.ViewportOrigin.X, (subImageRect.Y - ((msi.ViewportWidth / num) / 2.0)) + (subImageRect.Height / 2.0));
// double zoomFactor = (msi.ActualWidth / subImageRect.Width) < (msi.ActualHeight / subImageRect.Height) ?
// msi.ActualWidth / subImageRect.Width : msi.ActualHeight / subImageRect.Height;
// msi.ViewportWidth = zoomFactor * msi.ViewportWidth;
// msi.ViewportOrigin = point;
//}
public static void DisplaySubImageCentered(this MultiScaleImage msi, int indexSubImage)
{
if (indexSubImage < 0 || indexSubImage >= msi.SubImages.Count)
return;
Rect subImageRect = msi.GetSubImageRect(indexSubImage);
msi.CenterLogicalRect(subImageRect);
}
public static void ZoomCenter(this MultiScaleImage msi, int nbVirtualPage)
{
Rect subImageRect = msi.GetGlobalRect(1);
Rect imageRectElement = msi.LogicalToElementRect(subImageRect);
// Calculate the zoom factor such that the image will fill up the entire screen
double zoomFactor = (msi.ActualWidth / imageRectElement.Width) < (msi.ActualHeight / imageRectElement.Height) ?
msi.ActualWidth / imageRectElement.Width : msi.ActualHeight / imageRectElement.Height;
// Not a real zoom factor, don't zoom
if (!zoomFactor.IsRational())
return;
// Center the image
msi.CenterLogicalRect(subImageRect);
// Use the mid point of the image to zoom from
msi.ZoomAboutLogicalPoint(zoomFactor, (subImageRect.Left + subImageRect.Right) / 2, (subImageRect.Top + subImageRect.Bottom) / 2);
}
public static void CenterLogicalRect(this MultiScaleImage msi, Rect rectLogical)
{
msi.CenterLogicalRect(rectLogical, msi.ViewportWidth);
}
