/// <summary>
/// Initializes a new instance of the <see cref="HistoryItem"/> class.
/// </summary>
/// <param name="file">The backing file.</param>
/// <param name="historyCanvas">The history canvas.</param>
/// <param name="currentImage">The current image.</param>
public HistoryItem(string file, CanvasHistoryState historyCanvas, BitmapSource currentImage)
{
backingFile = file;
state = HistoryItemState.Memory;
chunk = new HistoryChunk(historyCanvas, currentImage);
ToDisk();
}
/// <summary>
/// Retrieves the HistoryChunk from disk.
/// </summary>
public void ToMemory()
{
if (state == HistoryItemState.Disk)
{
using (FileStream fs = new FileStream(backingFile, FileMode.Open, FileAccess.Read, FileShare.None))
{
BinaryFormatter bf = new BinaryFormatter();
chunk = (HistoryChunk)bf.Deserialize(fs);
state = HistoryItemState.Memory;
}
}
}
