/// <summary>
/// Cell property changed event handler. change of a value of a cell.
/// </summary>
/// <param name="sender">Sender of event.</param>
/// <param name="e">What is changed.</param>
public void UICellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.RowIndex == -1 || e.ColumnIndex == -1)
{
// if given cell is out of range
return;
}
DataGridView changedDataGridView = sender as DataGridView;
DataGridViewCell newCell = changedDataGridView.Rows[e.RowIndex].Cells[e.ColumnIndex];
BaseCell spreadSheetCell = this.spreadSheet[e.RowIndex, e.ColumnIndex];
ICommandInterface newCommand;
// push new command to undo stack for latter call
if (spreadSheetCell.Text == null)
{
// if the content of the cell is empty.
newCommand = new UndoCommand(CommandType.Text, spreadSheetCell, string.Empty);
}
else
{
newCommand = new UndoCommand(CommandType.Text, spreadSheetCell, spreadSheetCell.Text);
}
this.undoStack.Push(newCommand);
// change text to new cell value.
spreadSheetCell.Text = newCell.Value.ToString();
}
private UndoCommand SpreadSheetUndo()
{
ICommandInterface command = this.undoStack.Pop();
UndoCommand newCommand = command as UndoCommand;
while (newCommand.Content == null)
{
command = this.undoStack.Pop();
newCommand = command as UndoCommand;
}
if (newCommand.CommandType == CommandType.Text)
{
ICommandInterface newRedoCommand = new RedoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Text);
this.redoStack.Push(newRedoCommand);
}
else if (newCommand.CommandType == CommandType.Color)
{
ICommandInterface newRedoCommand = new RedoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Color.ToString());
this.redoStack.Push(newRedoCommand);
}
command.Action();
return(newCommand);
}
/// <summary>
/// event handler for cell back color change.
/// </summary>
/// <param name="dataGridViewCell">datagridview cell.</param>
/// <param name="newColorCode">new color code.</param>
public void BackColorChangeHandler(DataGridViewCell dataGridViewCell, int newColorCode)
{
// create new command and push it
ICommandInterface newCommand = new UndoCommand(CommandType.Color, this.spreadSheet[dataGridViewCell.RowIndex, dataGridViewCell.ColumnIndex], this.spreadSheet[dataGridViewCell.RowIndex, dataGridViewCell.ColumnIndex].Color.ToString());
this.undoStack.Push(newCommand);
// change cell's color to given color
this.spreadSheet[dataGridViewCell.RowIndex, dataGridViewCell.ColumnIndex].Color = newColorCode;
dataGridViewCell.Style.BackColor = System.Drawing.Color.FromArgb(Convert.ToInt32(this.spreadSheet[dataGridViewCell.RowIndex, dataGridViewCell.ColumnIndex].Color));
}
/// <summary>
/// Undo execution event.
/// </summary>
public void UndoExecute(DataGridView dataGridView)
{
// execute command in the undo stack
UndoCommand newCommand = this.SpreadSheetUndo();
// update data grid view cell
if (newCommand.CommandType == CommandType.Text)
{
dataGridView.Rows[newCommand.Cell.RowIndex].Cells[newCommand.Cell.ColumnIndex].Value = this.spreadSheet[newCommand.Cell.RowIndex, newCommand.Cell.ColumnIndex].Text;
this.undoStack.Pop();
}
else if (newCommand.CommandType == CommandType.Color)
{
dataGridView.Rows[newCommand.Cell.RowIndex].Cells[newCommand.Cell.ColumnIndex].Style.BackColor = System.Drawing.Color.FromArgb(this.spreadSheet[newCommand.Cell.RowIndex, newCommand.Cell.ColumnIndex].Color);
}
}
/// <summary>
/// Spreadsheet undo execute.
/// </summary>
public void SpreadSheetUndo()
{
ICommandInterface command = this.undoStack.Pop();
UndoCommand newCommand = command as UndoCommand;
if (newCommand.CommandType == CommandType.Text)
{
ICommandInterface newRedoCommand = new RedoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Text);
this.redoStack.Push(newRedoCommand);
}
else if (newCommand.CommandType == CommandType.Color)
{
ICommandInterface newRedoCommand = new RedoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Color.ToString());
this.redoStack.Push(newRedoCommand);
}
command.Action();
}
private RedoCommand SpreadSheetRedo()
{
ICommandInterface command = this.redoStack.Pop();
RedoCommand newCommand = command as RedoCommand;
if (newCommand.CommandType == CommandType.Text)
{
ICommandInterface newUndoCommand = new UndoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Text);
this.UndoStack.Push(newUndoCommand);
}
else if (newCommand.CommandType == CommandType.Color)
{
ICommandInterface newUndoCommand = new UndoCommand(newCommand.CommandType, newCommand.Cell, newCommand.Cell.Color.ToString());
this.undoStack.Push(newUndoCommand);
}
command.Action();
return(newCommand);
}
/// <summary>
/// Add undo command to undo stack.
/// </summary>
/// <param name="row">row number of cell.</param>
/// <param name="col">col number of cell.</param>
/// <param name="commandType">command type of command.</param>
/// <param name="content">the content of command.</param>
public void AddUndo(int row, int col, CommandType commandType, string content)
{
ICommandInterface newCommand = new UndoCommand(commandType, this.spreadSheet[row, col], content);
this.undoStack.Push((UndoCommand)newCommand);
}