private void ReloadDocument()
{
if (Document == null)
{
return;
}
PageInfo.Clear();
if (FThumbnailLarge != null) //Reload document is always called first for the big preview and later for the thumbs.
{
FirstPageExportInfo = TImgExportInfo.Clone(FThumbnailLarge.FirstPageExportInfo);
}
else
{
FirstPageExportInfo = Document.GetFirstPageExportInfo();
}
FTotalPages = FirstPageExportInfo.TotalPages;
SavedStartPage = 0;
ResizeCanvas(new Point(0, 0));
OnZoomChanged(new EventArgs());
}
internal Bitmap GetImage(int index)
{
TImgExportInfo ei = null;
if (Count > 0)
{
ei = TImgExportInfo.Clone(this[Count - 1].ExportInfo);
}
else
{
ei = TImgExportInfo.Clone(Owner.FirstPageExportInfo);
}
for (int i = Count; i <= index; i++)
{
GetNextImage(ref ei, null);
Add(new TPageInfo(TImgExportInfo.Clone(ei), null));
}
TPageInfo Pi = this[index];
if (Pi.Bmp == null)
{
RectangleF Page = Pi.ExportInfo.ActiveSheet.PageBounds;
Pi.Bmp = BitmapConstructor.CreateBitmap((int)(Page.Width * Owner.Zoom), (int)(Page.Height * Owner.Zoom));
Pi.Bmp.SetResolution(96 * Owner.Zoom, 96 * Owner.Zoom);
TImgExportInfo ExportInfo = null;
if (index > 0)
{
ExportInfo = TImgExportInfo.Clone(this[index - 1].ExportInfo);
}
else
{
ExportInfo = TImgExportInfo.Clone(Owner.FirstPageExportInfo);
}
GetNextImage(ref ExportInfo, Pi.Bmp);
CacheCount++;
}
//Bring the item to last position on the cache.
if (Pi.Next != null)
{
Pi.Next.Prev = Pi.Prev;
if (Pi.Prev != null)
{
Pi.Prev.Next = Pi.Next;
}
else
{
CacheFirst = Pi.Next;
}
}
if (CacheFirst == null)
{
CacheFirst = Pi;
}
if (CacheLast != Pi)
{
Pi.Prev = CacheLast;
if (CacheLast != null)
{
CacheLast.Next = Pi;
}
CacheLast = Pi;
Pi.Next = null;
}
//If we have more bitmaps on the cache that what is allowed, delete the one at the first position.
if (CacheFirst != null && CacheCount > 1 + Owner.CacheSize / (Owner.Zoom * Owner.Zoom))
{
if (CacheFirst.Next != null)
{
CacheFirst.Bmp.Dispose();
CacheFirst.Bmp = null;
CacheCount--;
TPageInfo Next = CacheFirst.Next;
Next.Prev = null;
CacheFirst.Next = null;
CacheFirst = Next;
}
}
Debug.Assert(CacheFirst == null || CacheFirst.Prev == null, "Error in cache");
Debug.Assert(CacheLast == null || CacheLast.Next == null, "Error in cache");
return(Pi.Bmp);
}