/// <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>
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
public void Dispose()
{
if (!disposed)
{
File.Delete(backingFile);
chunk.Dispose();
state = HistoryItemState.Disposed;
disposed = true;
}
}
/// <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;
}
}
}
/// <summary>
/// Serializes the HistoryChunk to disk.
/// </summary>
public void ToDisk()
{
if (state == HistoryItemState.Memory)
{
using (FileStream fs = new FileStream(backingFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None))
{
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(fs, chunk);
state = HistoryItemState.Disk;
chunk.Dispose();
}
}
}
private void SetButtonsVisibility(HistoryItemHolder holder, HistoryItemState state)
{
switch (state)
{
case HistoryItemState.Url:
holder.MoveFiles.Visibility = ViewStates.Gone;
holder.OpenFile.Visibility = ViewStates.Gone;
holder.BrowseFiles.Visibility = ViewStates.Gone;
holder.OpenUrl.Visibility = ViewStates.Visible;
holder.CopyToClipboard.Visibility = ViewStates.Visible;
holder.Share.Visibility = ViewStates.Visible;
break;
case HistoryItemState.Text:
holder.MoveFiles.Visibility = ViewStates.Gone;
holder.OpenFile.Visibility = ViewStates.Gone;
holder.BrowseFiles.Visibility = ViewStates.Gone;
holder.OpenUrl.Visibility = ViewStates.Gone;
holder.CopyToClipboard.Visibility = ViewStates.Visible;
holder.Share.Visibility = ViewStates.Visible;
break;
case HistoryItemState.SingleFile:
holder.MoveFiles.Visibility = ViewStates.Visible;
holder.OpenFile.Visibility = ViewStates.Visible;
holder.BrowseFiles.Visibility = ViewStates.Gone;
holder.OpenUrl.Visibility = ViewStates.Gone;
holder.CopyToClipboard.Visibility = ViewStates.Gone;
holder.Share.Visibility = ViewStates.Visible;
break;
case HistoryItemState.MultipleFiles:
holder.MoveFiles.Visibility = ViewStates.Visible;
holder.OpenFile.Visibility = ViewStates.Gone;
holder.BrowseFiles.Visibility = ViewStates.Visible;
holder.OpenUrl.Visibility = ViewStates.Gone;
holder.CopyToClipboard.Visibility = ViewStates.Gone;
holder.Share.Visibility = ViewStates.Gone;
break;
default:
holder.MoveFiles.Visibility = ViewStates.Gone;
holder.OpenFile.Visibility = ViewStates.Gone;
holder.BrowseFiles.Visibility = ViewStates.Gone;
holder.OpenUrl.Visibility = ViewStates.Gone;
holder.CopyToClipboard.Visibility = ViewStates.Gone;
holder.Share.Visibility = ViewStates.Gone;
break;
}
}
public BaseHistoryItem(string icon, string text, HistoryItemState state)
{
Icon = icon;
Text = text;
State = state;
}
public BaseHistoryItem(string icon, string text, HistoryItemState state)
{
Icon = icon;
Text = text;
State = state;
}
