/// <summary>
/// Initializes a new instance of the SelectionUndoTask class
/// </summary>
/// <param name="targetBitmap">The target bitmap for the undo task</param>
/// <param name="selectionBitmap">The selection bitmap</param>
/// <param name="originalSlice">The original image slice before a Move operation was made</param>
/// <param name="selectionStartArea">The area that the selection started at</param>
/// <param name="area">The area of the affected SelectionUndoTask</param>
/// <param name="operationType">The operation type of this SelectionUndoTask</param>
/// <param name="compositingMode">The compositing mode for the operation</param>
public SelectionUndoTask(Bitmap targetBitmap, Bitmap selectionBitmap, Bitmap originalSlice, Rectangle selectionStartArea, Rectangle area, SelectionOperationType operationType, CompositingMode compositingMode)
{
_targetbitmap = targetBitmap;
_selectionBitmap = (Bitmap)selectionBitmap.Clone();
_originalSlice = (Bitmap)originalSlice?.Clone();
_selectionStartArea = selectionStartArea;
_area = area;
_operationType = operationType;
_compositingMode = compositingMode;
}
/// <summary>
/// Starts the selection operation witht he given area, bitmap and operation type
/// </summary>
/// <param name="area">The area to place the bitmap at</param>
/// <param name="pasteBitmap">The bitmap to paste</param>
/// <param name="operation">The operation type to mark this selection as</param>
public void StartOperation(Rectangle area, Bitmap pasteBitmap, SelectionOperationType operation)
{
pictureBox.OwningPanel.UndoSystem.StartGroupUndo("Selection", true);
OperationType = operation;
ForceApplyChanges = false;
selectionBitmap?.Dispose();
selected = true;
selectedArea = area;
selectedStartArea = area;
// Get the selected area
if (pasteBitmap == null)
{
pasteBitmap = ExtractBitmap(area);
// Clear the bitmap behind the image
graphics = Graphics.FromImage(pictureBox.Image);
graphics.SetClip(selectedArea);
graphics.Clear(Color.Transparent);
graphics.Dispose();
graphics = null;
UpdateClipboardState();
}
selectionBitmap = pasteBitmap;
pictureBox.Invalidate(GetSelectionArea(true));
_animTimer.Start();
}
/// <summary>
/// Starts the selection operation with the given area and operation mode
/// </summary>
/// <param name="area">The area to select</param>
/// <param name="operation">The operation mode to apply</param>
public void StartOperation(Rectangle area, SelectionOperationType operation)
{
StartOperation(area, null, operation);
}