//pushes new undo onto the stack
public void addRedo(UndoRedoCollection redo)
{
_redos.Push(redo);
SpreadSheet_StackPropertyChange("Redos");
}
private void redoOperation()
{
//if the stack is not empty
if (_spreadSheet.hasRedo())
{
UndoRedoCollection myRedo = _spreadSheet.getRedo();
List<UndoRedo> myUndoList = new List<UndoRedo>();
//for every object in the changedProperty list
foreach (UndoRedo property in myRedo.changedProperty)
{
//undo their function
myUndoList.Add(property.Reverse(_spreadSheet));
property.Execute(_spreadSheet);
}
UndoRedoCollection myUndo = new UndoRedoCollection(myUndoList);
_spreadSheet.addUndo(myUndo);
}
}
//pushes new undo onto the stack
public void addUndo(UndoRedoCollection undo)
{
_undos.Push(undo);
SpreadSheet_StackPropertyChange("Undos");
}
private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
if (sender is DataGridView)
{
var dgv = (DataGridView)sender;
Cell myCell = _spreadSheet.getCell(dgv.CurrentCell.ColumnIndex, dgv.CurrentCell.RowIndex);
//if the cells value ends as null, set the value to "".
if (dgv.CurrentCell.Value == null)
{
dgv.CurrentCell.Value = "";
}
//HANDLES THE UNDOING OF THIS FUNCTION
if (dgv.CurrentCell.Value.ToString() != myCell.Text)
{
//creates an undo redo collection of a text chage object that contains this specific cell
//and containsn the text of the cell before it has been altered
List<UndoRedo> changedProperties = new List<UndoRedo>();
changedProperties.Add(new textChange(myCell, myCell.Text));
UndoRedoCollection text = new UndoRedoCollection(changedProperties);
//adds it to the stack
_spreadSheet.addUndo(text);
//clears redo stack
_spreadSheet.clearRedo();
}
//at the end of edit, set myCell to the value ""
_spreadSheet.setCellText(myCell, dgv.CurrentCell.Value.ToString());
//Set the value of the cell to the evaluated myCell value.
dgv.CurrentCell.Value = myCell.Value;
}
}
