private void AddDataTableEventHandlers(DataTable dataTable)
{
dataTable.ColumnChanging +=
(object sender, DataColumnChangeEventArgs e) =>
{
if (!mIsLoading && !mIsApplyingChanges)
{
DataCell cell = new DataCell(e.Column, (RecipeRow)e.Row);
MultipleCellChange change = new MultipleCellChange(cell, e.Row[e.Column], e.ProposedValue);
mUndoStack.Push(change);
}
};
dataTable.ColumnChanged +=
(object sender, DataColumnChangeEventArgs e) =>
{
RecipeRow row = (RecipeRow)e.Row;
DataColumn column = e.Column;
mDataTable.GetColumnBehavior(column).OnDataCellChanged(e);
if (!mIsLoading)
{
unsavedFilesLabel.Visible = true;
mModifiedCells.Add(new DataCell(column, row));
}
};
}
private void ApplyCellChanges(Stack <MultipleCellChange> fromStack, Stack <MultipleCellChange> toStack, Action <MultipleCellChange> doChange)
{
if (fromStack.Any())
{
MultipleCellChange changes = fromStack.Pop();
mIsApplyingChanges = true;
doChange(changes);
mIsApplyingChanges = false;
toStack.Push(changes);
// Hide unsaved indicator if we have undone/redone to the current state of the files
if (currentStateUndoIndex == mUndoStack.Count())
{
unsavedFilesLabel.Visible = false;
mModifiedCells.Clear();
}
}
}
private bool SetGridValue(int colIndex, int rowIndex, string value, MultipleCellChange changes)
{
try
{
DataGridViewColumn column = recipesGridView.Columns[colIndex];
if (column is DataGridViewComboBoxColumn)
{
List <string> autoCompleteStrings = (column as DataGridViewComboBoxColumn).DataSource as List <string>;
if (!autoCompleteStrings.Contains(value))
{
MessageBox.Show(string.Format("Value \"{0}\" not found in combobox for column \"{1}\"", value, column.Name));
return(false);
}
}
else if (column.ReadOnly)
{
MessageBox.Show(string.Format("Trying to write to read-only column {0}", column.Name));
return(false);
}
object oldValue = mDataTable.GetRow(rowIndex)[colIndex];
if (string.IsNullOrEmpty(value))
{
mDataTable.GetRow(rowIndex)[colIndex] = DBNull.Value;
}
else
{
mDataTable.GetRow(rowIndex)[colIndex] = value;
}
DataCell cell = new DataCell(mDataTable.Columns[colIndex], mDataTable.GetRow(rowIndex));
changes.Add(new CellChange(cell, oldValue, value));
}
catch (Exception exception)
{
MessageBox.Show(string.Format("Unable to set grid value for ({0}, {1}). Error: {2}", colIndex, rowIndex, exception.Message));
return(false);
}
return(true);
}
private void recipesGridView_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
if (!recipesGridView.IsCurrentCellInEditMode)
{
recipesGridView.BeginEdit(true);
e.Handled = true;
}
}
else if (e.Control && e.KeyCode == Keys.S)
{
// Save on ctrl+s
SaveModifiedFiles();
}
else if ((e.Control && e.Shift && e.KeyCode == Keys.Z) || (e.Control && e.KeyCode == Keys.Y))
{
// Redo on ctrl+shift+z or ctrl+y
ApplyCellChanges(mRedoStack, mUndoStack, changes => changes.Redo());
}
else if (e.Control && e.KeyCode == Keys.Z)
{
// Undo on ctrl+z
ApplyCellChanges(mUndoStack, mRedoStack, changes => changes.Undo());
}
else if (e.KeyCode == Keys.Delete)
{
if (recipesGridView.SelectedCells.Count == 0)
{
return;
}
else if (recipesGridView.SelectedCells.Count == 1)
{
// Delete current cell on del if only one selected
DeleteCurrentCell();
}
else
{
// Delete multiple cells
// Add cell changes to one transaction so we can roll back if needed
mIsApplyingChanges = true;
MultipleCellChange changes = new MultipleCellChange();
foreach (DataGridViewCell cell in recipesGridView.SelectedCells)
{
DataColumn dataColumn = mDataTable.GetColumn(cell.ColumnIndex);
RecipeRow recipeRow = mDataTable.GetRow(cell.RowIndex);
object oldValue = recipeRow[dataColumn];
object newValue = DBNull.Value;
bool success = mDataTable.GetColumnBehavior(dataColumn).TryDeleteCell(recipeRow);
if (!success)
{
changes.Undo();
return;
}
DataCell dataCell = new DataCell(dataColumn, recipeRow);
changes.Add(new CellChange(dataCell, oldValue, newValue));
}
// Save cell changes made in this delete operation
mUndoStack.Push(changes);
mIsApplyingChanges = false;
}
}
else if (e.Control && e.KeyCode == Keys.V)
{
// Paste multiple cells on ctrl+v
if (recipesGridView.SelectedCells.Count == 0)
{
return;
}
// Add cell changes to one transaction so we can roll back if needed
mIsApplyingChanges = true;
MultipleCellChange changes = new MultipleCellChange();
Tuple <DataGridViewCell, DataGridViewCell> boundaryCells = GetSelectedCellsBoundaries();
DataGridViewCell startCell = boundaryCells.Item1;
DataGridViewCell endCell = boundaryCells.Item2;
int startRow = startCell.RowIndex;
int startCol = startCell.ColumnIndex;
int rowIndex = startRow;
string s = Clipboard.GetText();
string[] lines = s.Split(new string[] { System.Environment.NewLine }, StringSplitOptions.None);
int lineIndex = 0;
while (lineIndex < lines.Count())
{
string line = lines[lineIndex];
if (rowIndex < recipesGridView.Rows.Count)
{
string[] cells = line.Split('\t');
int colIndex = startCol;
for (int i = 0; i < cells.Length && colIndex < recipesGridView.Columns.Count; i++)
{
bool success = SetGridValue(colIndex, rowIndex, cells[i], changes);
if (!success)
{
changes.Undo();
return;
}
colIndex++;
}
rowIndex++;
}
lineIndex++;
// Repeat last line in clipboard if we've copied one line and the selected rows exceeds one line
if (lineIndex == lines.Count() && lines.Count() == 1)
{
int selectedRowCount = Math.Abs(startCell.RowIndex - endCell.RowIndex) + 1;
int clipboardRowCount = Math.Abs((rowIndex - 1) - startRow) + 1;
if (selectedRowCount > clipboardRowCount)
{
lineIndex--;
}
}
}
// Save cell changes made in this paste operation
mUndoStack.Push(changes);
mIsApplyingChanges = false;
}
}