public void PopUndo()
{
if (UndoStack.Count > 0) // ensures that there is something to be popped
{
CmdCollection from = UndoStack.Pop(); // pops the top list off of the undo stack -> all of the contents will be undone
/* Executes all commands in the popped list
* Pushes the inverse of the popped actions onto the redo stack */
RedoStack.Push(new CmdCollection(from.ExecuteAll()));
}
}
public void PopRedo()
{
if (RedoStack.Count > 0) // ensures that there is something to be popped
{
CmdCollection from = RedoStack.Pop();
/* Executes all commands in the popped list
* Pushes the inverse of the popped actions onto the redo stack */
UndoStack.Push(new CmdCollection(from.ExecuteAll()));
}
}
public CmdCollection ExecuteAll()
{
CmdCollection inverses = new CmdCollection(); // Will contain the opposite operations to the ones that are currently contained in this object
foreach (IUndoRedoCmd cmd in this.cmds)
{
/* Adds the inverse operations to a NEW CmdCollection
* This will be pushed onto the opposite stack from where the current operation came from */
inverses.cmds.Add(cmd.Execute());
}
return(inverses);
}
public CmdCollection(CmdCollection from)
{
/* Copy constructor
* simply copies over the list in 'from' */
this.cmds = from.cmds;
}
public void PushUndo(CmdCollection PropertyCollection)
{
UndoStack.Push(PropertyCollection); // Pushes the restoring collection on the undo stack
RedoStack.Clear(); // Clears the redo stack -> ensures that operations cannot be restored after preceding undo operations have been restored
}
public CmdCollection ExecuteAll()
{
CmdCollection inverses = new CmdCollection(); // Will contain the opposite operations to the ones that are currently contained in this object
foreach (IUndoRedoCmd cmd in this.cmds)
{
/* Adds the inverse operations to a NEW CmdCollection
* This will be pushed onto the opposite stack from where the current operation came from */
inverses.cmds.Add(cmd.Execute());
}
return inverses;
}
public CmdCollection(CmdCollection from)
{
/* Copy constructor
* simply copies over the list in 'from' */
this.cmds = from.cmds;
}
public void PushUndo(CmdCollection PropertyCollection)
{
UndoStack.Push(PropertyCollection); // Pushes the restoring collection on the undo stack
RedoStack.Clear(); // Clears the redo stack -> ensures that operations cannot be restored after preceding undo operations have been restored
}
private void color_changing(object sender, bool custom)
{
ColorDialog SelectColor = new ColorDialog();
if (custom) // user wants to select their own color -> prompts color dialogue
{
if (SelectColor.ShowDialog() != DialogResult.OK)
return;
}
else // the user chose one of the pre-selected colors
{
if (sender.ToString() == "Reset")
SelectColor.Color = System.Drawing.Color.FromArgb(-1);
if (sender.ToString() == "Green")
SelectColor.Color = System.Drawing.Color.FromArgb(192, 255, 192);
else if (sender.ToString() == "Red")
SelectColor.Color = System.Drawing.Color.FromArgb(255, 128, 128);
else if (sender.ToString() == "Orange")
SelectColor.Color = System.Drawing.Color.FromArgb(255, 192, 128);
else if (sender.ToString() == "Grey")
SelectColor.Color = System.Drawing.Color.FromArgb(131, 130, 120);
}
DataGridViewSelectedCellCollection CellsChanging = dataGridView1.SelectedCells; // Gets the collection of selected cells
CmdCollection BGRestore = new CmdCollection();
if (CellsChanging != null) // Ensures that there is at least one selected cell
{
foreach (DataGridViewCell cell in CellsChanging) // Foreach cell that has been selected, notify the spreadsheet of that cells property change
{
SpreadsheetCell Changing = mainSS[cell.RowIndex, cell.ColumnIndex];
RestoreBGColor newRestore = new RestoreBGColor(Changing, Changing.BGColor);
Changing.BGColor = SelectColor.Color.ToArgb(); // Converts the chosen color to ARBG integer format
BGRestore.Add(newRestore);
}
mainSS.PushUndo(BGRestore); // Adds the new restore collection
undoToolStripMenuItem.Text = "Undo - " + mainSS.PeekUndo; // Tells the UI which property will be undone
redoToolStripMenuItem.Enabled = false;
redoToolStripMenuItem.Text = "Redo";
}
}
