private void OnRedo(BitmapChanges change)
{
if (RedoHappened != null)
{
RedoHappened(change);
}
}
private void OnUndo(BitmapChanges change)
{
if (UndoHappened != null)
{
UndoHappened(change);
}
}
/// <summary>
/// Removes and disposes the last undo.
/// </summary>
public void DisposeLastUndo()
{
if (undos.Count < 1)
{
return;
}
BitmapChanges change = undos.Pop();
// if the change being removed had any bitmap data stored dispose it
switch (change)
{
case BitmapChanges.Cropped:
case BitmapChanges.Resized:
case BitmapChanges.SetGray:
case BitmapChanges.TransparentFilled:
if (bitmapUndoHistoryData.Count < 1)
{
return;
}
bitmapUndoHistoryData.Pop().Dispose();
break;
}
}
/// <summary>
/// Tracks a change done to the bitmap. Depending on the change the CurrentBitmap will be copied and saved in the history.
/// <para>This should be called BEFORE the change is applied to the bitmap. If the change has been tracked but not be applied the DisposeLastUndo or DisposeLastRedo should be called.</para>
/// </summary>
/// <param name="change">The change that is going to occure to the bitmap.</param>
public void TrackChange(BitmapChanges change)
{
ClearRedos();
undos.Push(change);
switch (change)
{
// need to track history data
case BitmapChanges.Cropped:
case BitmapChanges.Dithered:
case BitmapChanges.Resized:
case BitmapChanges.SetGray:
case BitmapChanges.TransparentFilled:
bitmapUndoHistoryData.Push(CloneProper());
break;
// changes are easily undone and do not need to be kept in memory
case BitmapChanges.Inverted:
case BitmapChanges.RotatedLeft:
case BitmapChanges.RotatedRight:
case BitmapChanges.FlippedHorizontal:
case BitmapChanges.FlippedVirtical:
break;
}
}
private void OnUndoRedo(BitmapChanges change)
{
if (ibMain == null)
{
return;
}
//InvalidateImageBox();
ibMain.UpdateLayout();
}
/// <summary>
/// Undoes the last tracked change.
/// </summary>
public void Undo()
{
if (undos.Count < 1)
{
return;
}
BitmapChanges change = undos.Pop();
redos.Push(change);
switch (change)
{
// need to track history data
case BitmapChanges.Cropped:
case BitmapChanges.Resized:
case BitmapChanges.Dithered:
case BitmapChanges.SetGray:
case BitmapChanges.TransparentFilled:
bitmapRedoHistoryData.Push(CloneProper());
CurrentBitmap.UpdateImage(bitmapUndoHistoryData.Pop());
break;
// changes are easily undone and do not need to be kept in memory
case BitmapChanges.Inverted:
CurrentBitmap.InvertColor();
break;
case BitmapChanges.RotatedLeft:
CurrentBitmap.RotateRight90();
break;
case BitmapChanges.RotatedRight:
CurrentBitmap.RotateLeft90();
break;
case BitmapChanges.FlippedHorizontal:
CurrentBitmap.FlipHorizontal();
break;
case BitmapChanges.FlippedVirtical:
CurrentBitmap.FlipVertical();
break;
}
OnUndo(change);
}
