public DataGridCellEditingCancelEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
FrameworkElement element,
DataGridEditingTriggerInfo editingTriggerInfo) : base(dataGridColumn, dataGridRow, element)
{
this.EditingTriggerInfo = editingTriggerInfo;
}
public DataGridCellEditingCancelEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
FrameworkElement element,
DataGridEditingTriggerInfo editingTriggerInfo) : base(dataGridColumn, dataGridRow, element)
{
this.EditingTriggerInfo = editingTriggerInfo;
}
public DataGridPrepareCellEditEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
Control element,
DataGridEditingTriggerInfo editingTriggerInfo) : base(dataGridColumn, dataGridRow, element)
{
this.EditingTriggerInfo = editingTriggerInfo;
}
private void OnRemoveFirstColumn(object sender, RoutedEventArgs e)
{
if (DataGrid.Columns.Count > 0)
{
_removedColumn = DataGrid.Columns.First();
DataGrid.Columns.Remove(_removedColumn);
}
}
public DataGridColumnEventArgs(DataGridColumnBase column)
{
if (column == null)
{
throw new ArgumentNullException("column");
}
this.Column = column;
}
public DataGridColumnEventArgs(DataGridColumnBase column)
{
if (column == null)
{
throw new ArgumentNullException("column");
}
this.Column = column;
}
private void OnAddRemovedColumn(object sender, RoutedEventArgs e)
{
if (_removedColumn != null)
{
DataGrid.Columns.Add(_removedColumn);
_removedColumn = null;
}
}
//Gets inventory data from database and sets it as the datagrid's source.
private void UpdateTable()
{
if (DataGrid.SelectedColumn != null)
{
DataGridColumnBase Column = DataGrid.SelectedColumn;
DataGrid.ItemsSource = Item.Table;
DataGrid.SelectColumn(Column);
DataGrid.SelectColumn(Column);
}
else
{
DataGrid.ItemsSource = Item.Table;
}
}
public DataGridDataErrorEventArgs(Exception exception,
DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow)
{
if (dataGridColumn == null)
{
throw new ArgumentNullException("dataGridColumn");
}
//
this.Column = dataGridColumn;
this.Row = dataGridRow;
this.Exception = exception;
}
public DataGridDataErrorEventArgs(Exception exception,
DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow)
{
if (dataGridColumn == null)
{
throw new ArgumentNullException("dataGridColumn");
}
//
this.Column = dataGridColumn;
this.Row = dataGridRow;
this.Exception = exception;
}
public DataGridCellEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
FrameworkElement element)
{
if (dataGridColumn == null)
{
throw new ArgumentNullException("dataGridColumn");
}
if (dataGridRow == null)
{
throw new ArgumentNullException("dataGridRow");
}
if (element == null)
{
throw new ArgumentNullException("element");
}
this.Column = dataGridColumn;
this.Row = dataGridRow;
this.Element = element;
}
internal bool GetColumnReadOnlyState(DataGridColumnBase dataGridColumn, bool isReadOnly)
{
Debug.Assert(dataGridColumn != null);
DataGridBoundColumnBase dataGridBoundColumn = dataGridColumn as DataGridBoundColumnBase;
if (dataGridBoundColumn != null && !string.IsNullOrEmpty(dataGridBoundColumn.DisplayMemberPath))
{
if (dataGridBoundColumn.DisplayMemberBinding != null
&& dataGridBoundColumn.DisplayMemberBinding.Converter != null
&& dataGridBoundColumn.DisplayMemberBinding.Converter is DataGridValueConverter)
{
if (!DataGridValueConverter.CanEdit(dataGridBoundColumn.Type))
{
return true;
}
}
return this.DataConnection.GetPropertyIsReadOnly(dataGridBoundColumn.DisplayMemberPath) || isReadOnly;
}
return isReadOnly;
}
internal void OnColumnDisplayIndexChanged(DataGridColumnBase dataGridColumn)
{
Debug.Assert(dataGridColumn != null);
DataGridColumnEventArgs e = new DataGridColumnEventArgs(dataGridColumn);
// Call protected method to raise event
OnColumnDisplayIndexChanged(e);
}
private static void UpdateCellElement(DataGridColumnBase dataGridColumn, DataGridRow dataGridRow, string propertyName)
{
Debug.Assert(dataGridColumn != null);
Debug.Assert(dataGridRow != null);
DataGridCell dataGridCell = dataGridRow.Cells[dataGridColumn.Index];
Debug.Assert(dataGridCell != null);
FrameworkElement element = dataGridCell.Content as FrameworkElement;
if (element != null)
{
dataGridColumn.UpdateElement(element, propertyName);
}
}
public DataGridCellCancelEventArgs(DataGridColumnBase dataGridColumn,
DataGridRow dataGridRow,
FrameworkElement element) : base(dataGridColumn, dataGridRow, element)
{
}
/// <summary>
/// Called when a column property changes, and its cells need to
/// adjust that that column change.
/// </summary>
internal void UpdateColumnElements(DataGridColumnBase dataGridColumn, string propertyName)
{
Debug.Assert(dataGridColumn != null);
//
// Take care of the non-displayed prepared rows
for (int index = 0; index < this._preparedRows.Count; )
{
DataGridRow dataGridRow = this._preparedRows[index];
Debug.Assert(dataGridRow != null);
if (!IsRowDisplayed(dataGridRow.Index))
{
UpdateCellElement(dataGridColumn, dataGridRow, propertyName);
}
index++;
}
// Take care of the non-displayed edited row
if (this._editingRow != null && !IsRowDisplayed(this._editingRow.Index))
{
UpdateCellElement(dataGridColumn, this._editingRow, propertyName);
}
// Take care of the displayed rows
if (this._cells != null)
{
for (int childIndex = 0; childIndex < this.DisplayedRowCount; childIndex++)
{
UpdateCellElement(dataGridColumn, GetDisplayedRow(this._firstDisplayedRowIndex + childIndex), propertyName);
}
}
}
internal DataGridCellCoordinates OnRemovingColumn(DataGridColumnBase dataGridColumn)
{
Debug.Assert(dataGridColumn != null);
Debug.Assert(dataGridColumn.Index >= 0 && dataGridColumn.Index < this.ColumnsItemsInternal.Count);
DataGridCellCoordinates newCurrentCellCoordinates;
this._temporarilyResetCurrentCell = false;
int columnIndex = dataGridColumn.Index;
// Trash all recyclable rows
this._recyclableRows.Clear();
// Reset the current cell's address if there is one.
if (this.CurrentColumnIndex != -1)
{
int newCurrentColumnIndex = this.CurrentColumnIndex;
if (columnIndex == newCurrentColumnIndex)
{
DataGridColumnBase dataGridColumnNext = this.ColumnsInternal.GetNextVisibleColumn(this.ColumnsItemsInternal[columnIndex]);
if (dataGridColumnNext != null)
{
if (dataGridColumnNext.Index > columnIndex)
{
newCurrentColumnIndex = dataGridColumnNext.Index - 1;
}
else
{
newCurrentColumnIndex = dataGridColumnNext.Index;
}
}
else
{
DataGridColumnBase dataGridColumnPrevious = this.ColumnsInternal.GetPreviousVisibleColumn(this.ColumnsItemsInternal[columnIndex]);
if (dataGridColumnPrevious != null)
{
if (dataGridColumnPrevious.Index > columnIndex)
{
newCurrentColumnIndex = dataGridColumnPrevious.Index - 1;
}
else
{
newCurrentColumnIndex = dataGridColumnPrevious.Index;
}
}
else
{
newCurrentColumnIndex = -1;
}
}
}
else if (columnIndex < newCurrentColumnIndex)
{
newCurrentColumnIndex--;
}
newCurrentCellCoordinates = new DataGridCellCoordinates(newCurrentColumnIndex, (newCurrentColumnIndex == -1) ? -1 : this.CurrentRowIndex);
if (columnIndex == this.CurrentColumnIndex)
{
// Left cell is not validated since cancelling validation wouldn't have any effect anyways.
bool success = SetCurrentCellCore(-1, -1/* */);
Debug.Assert(success);
}
else //
{
// Underlying data of deleted column is gone. It cannot be accessed anymore.
// Do not end editing mode so that CellValidation doesn't get raised, since that event needs the current formatted value.
this._temporarilyResetCurrentCell = true;
bool success = SetCurrentCellCore(-1, -1/* */);
Debug.Assert(success);
}
//
}
else
{
newCurrentCellCoordinates = new DataGridCellCoordinates(-1, -1);
}
// If the last column is removed, delete all the rows first.
if (this.ColumnsItemsInternal.Count == 1)
{
ClearRows();
}
else
{
// Removing the potential vertical gridlines
RemoveDisplayedVerticalGridlines(dataGridColumn);
}
// Is deleted column scrolled off screen?
if (dataGridColumn.Visibility == Visibility.Visible &&
!dataGridColumn.IsFrozen &&
this.DisplayData.FirstDisplayedScrollingCol >= 0)
{
// Deleted column is part of scrolling columns.
if (this.DisplayData.FirstDisplayedScrollingCol == dataGridColumn.Index)
{
// Deleted column is first scrolling column
this._horizontalOffset -= this._negHorizontalOffset;
this._negHorizontalOffset = 0;
}
else if (!this.ColumnsInternal.DisplayInOrder(this.DisplayData.FirstDisplayedScrollingCol, dataGridColumn.Index))
{
// Deleted column is displayed before first scrolling column
Debug.Assert(this._horizontalOffset >= GetEdgedColumnWidth(dataGridColumn));
this._horizontalOffset -= GetEdgedColumnWidth(dataGridColumn);
}
if (this._hScrollBar != null && this._hScrollBar.Visibility == Visibility.Visible) //
{
this._hScrollBar.Value = this._horizontalOffset;
}
}
return newCurrentCellCoordinates;
}
internal DataGridCellCoordinates OnInsertingColumn(int columnIndexInserted, DataGridColumnBase insertColumn)
{
DataGridCellCoordinates newCurrentCellCoordinates;
Debug.Assert(insertColumn != null);
if (insertColumn.OwningGrid != null)
{
throw DataGridError.DataGrid.ColumnCannotBeReassignedToDifferentDataGrid();
}
// Trash all recyclable rows
this._recyclableRows.Clear();
// check for correctness of frozen state - throws exception if state is incorrect.
CorrectColumnFrozenState(insertColumn, columnIndexInserted);
// Reset current cell if there is one, no matter the relative position of the columns involved
if (this.CurrentColumnIndex != -1)
{
newCurrentCellCoordinates = new DataGridCellCoordinates(columnIndexInserted <= this.CurrentColumnIndex ? this.CurrentColumnIndex + 1 : this.CurrentColumnIndex,
this.CurrentRowIndex);
ResetCurrentCellCore();
}
else
{
newCurrentCellCoordinates = new DataGridCellCoordinates(-1, -1);
}
return newCurrentCellCoordinates;
}
internal void OnColumnVisibleStateChanging(DataGridColumnBase targetColumn)
{
Debug.Assert(targetColumn != null);
if (targetColumn.Visibility == Visibility.Visible &&
this.CurrentColumn == targetColumn)
{
// Column of the current cell is made invisible. Trying to move the current cell to a neighbor column. May throw an exception.
DataGridColumnBase dataGridColumn = this.ColumnsInternal.GetNextVisibleColumn(targetColumn);
if (dataGridColumn == null)
{
dataGridColumn = this.ColumnsInternal.GetPreviousVisibleColumn(targetColumn);
}
if (dataGridColumn == null)
{
SetCurrentCellCore(-1, -1);
}
else
{
SetCurrentCellCore(dataGridColumn.Index, this.CurrentRowIndex);
}
}
CorrectColumnFrozenStates(targetColumn, false);
}
//
internal void OnColumnReadOnlyStateChanging(DataGridColumnBase dataGridColumn, bool isReadOnly)
{
Debug.Assert(dataGridColumn != null);
DataGridBoundColumnBase dataGridBoundColumn = dataGridColumn as DataGridBoundColumnBase;
if (!isReadOnly && !string.IsNullOrEmpty(dataGridBoundColumn.DisplayMemberPath))
{
if (this.DataConnection.GetPropertyIsReadOnly(dataGridBoundColumn.DisplayMemberPath))
{
// Cannot set a column to read/write when the backend does not allow it.
throw DataGridError.DataGrid.UnderlyingPropertyIsReadOnly();
}
}
if (isReadOnly && this.CurrentColumnIndex == dataGridColumn.Index)
{
// Edited column becomes read-only. Exit editing mode.
if (!EndCellEdit(true /*commitCellEdit*/, true /*exitEditingMode*/, this.ContainsFocus /*keepFocus*/))
{
throw DataGridError.DataGrid.CommitFailedCannotCompleteOperation();
}
}
}
internal bool ColumnRequiresRightGridline(DataGridColumnBase dataGridColumn, bool includeLastRightGridlineWhenPresent)
{
return (this.GridlinesVisibility == DataGridGridlines.Vertical || this.GridlinesVisibility == DataGridGridlines.All) && this.VerticalGridlinesBrush != null /*&& this.VerticalGridlinesThickness > 0*/ &&
(dataGridColumn != this.ColumnsInternal.LastVisibleColumn || (includeLastRightGridlineWhenPresent && this.ColumnsInternal.FillerColumn.IsActive));
}
internal void OnColumnDisplayIndexChanging(DataGridColumnBase targetColumn, int newDisplayIndex)
{
Debug.Assert(targetColumn != null);
Debug.Assert(newDisplayIndex != targetColumn.DisplayIndex);
if (InDisplayIndexAdjustments)
{
// We are within columns display indexes adjustments. We do not allow changing display indexes while adjusting them.
throw DataGridError.DataGrid.CannotChangeColumnCollectionWhileAdjustingDisplayIndexes();
}
// Throws an exception if the requested move is illegal
CorrectColumnFrozenStatesForMove(targetColumn, newDisplayIndex);
try
{
InDisplayIndexAdjustments = true;
// Move is legal - let's adjust the affected display indexes.
if (newDisplayIndex < targetColumn.DisplayIndex)
{
// DisplayIndex decreases. All columns with newDisplayIndex <= DisplayIndex < targetColumn.DisplayIndex
// get their DisplayIndex incremented.
foreach (DataGridColumnBase column in this.Columns)
{
if (newDisplayIndex <= column.DisplayIndex && column.DisplayIndex < targetColumn.DisplayIndex)
{
column.DisplayIndexInternal = column.DisplayIndex + 1;
column.DisplayIndexHasChanged = true; // OnColumnDisplayIndexChanged needs to be raised later on
}
}
}
else
{
// DisplayIndex increases. All columns with targetColumn.DisplayIndex < DisplayIndex <= newDisplayIndex
// get their DisplayIndex incremented.
foreach (DataGridColumnBase column in this.Columns)
{
if (targetColumn.DisplayIndex < column.DisplayIndex && column.DisplayIndex <= newDisplayIndex)
{
column.DisplayIndexInternal = column.DisplayIndex - 1;
column.DisplayIndexHasChanged = true; // OnColumnDisplayIndexChanged needs to be raised later on
}
}
}
}
finally
{
InDisplayIndexAdjustments = false;
}
// Note that displayIndex of moved column is updated by caller.
}
internal void OnColumnFrozenStateChanged(DataGridColumnBase updatedColumn)
{
Debug.Assert(updatedColumn != null);
if (updatedColumn.Visibility == Visibility.Visible)
{
if (updatedColumn.IsFrozen)
{
// visible column became frozen
if (this._horizontalOffset >= GetEdgedColumnWidth(updatedColumn))
{
Debug.Assert(this.ColumnsInternal.DisplayInOrder(updatedColumn.Index, this.DisplayData.FirstDisplayedScrollingCol));
this._horizontalOffset -= GetEdgedColumnWidth(updatedColumn);
}
else
{
this._horizontalOffset = this._negHorizontalOffset = 0;
}
}
else
{
// column was unfrozen - make it the first visible scrolling column if there is room
this._horizontalOffset = this._negHorizontalOffset = 0;
}
//
PerformLayout();
}
}
private void CorrectColumnFrozenState(DataGridColumnBase targetColumn, int anticipatedColumnIndex)
{
Debug.Assert(targetColumn != null);
Debug.Assert(anticipatedColumnIndex >= 0 && anticipatedColumnIndex <= this.ColumnsItemsInternal.Count);
int anticipatedColumnDisplayIndex;
if (targetColumn.DisplayIndex == -1 || targetColumn.DisplayIndex > this.ColumnsItemsInternal.Count)
{
anticipatedColumnDisplayIndex = anticipatedColumnIndex; // By default, we pick the Index as the DisplayIndex.
}
else
{
Debug.Assert(targetColumn.DisplayIndex >= 0 && targetColumn.DisplayIndex <= this.ColumnsItemsInternal.Count);
anticipatedColumnDisplayIndex = targetColumn.DisplayIndex; // The specified DisplayIndex is just fine.
}
DataGridColumnBase previousColumn;
int displayIndex = anticipatedColumnDisplayIndex - 1;
do
{
previousColumn = this.ColumnsInternal.GetColumnAtDisplayIndex(displayIndex);
displayIndex--;
}
while (displayIndex >= 0 && (previousColumn == null || previousColumn.Visibility == Visibility.Collapsed));
if (previousColumn != null && !previousColumn.IsFrozen && targetColumn.IsFrozen)
{
throw DataGridError.DataGrid.CannotAddNonFrozenColumn();
}
else
{
DataGridColumnBase nextColumn;
displayIndex = anticipatedColumnDisplayIndex;
do
{
nextColumn = this.ColumnsInternal.GetColumnAtDisplayIndex(displayIndex);
displayIndex++;
}
while (displayIndex < this.ColumnsItemsInternal.Count && (nextColumn == null || nextColumn.Visibility == Visibility.Collapsed));
if (nextColumn != null && nextColumn.IsFrozen && !targetColumn.IsFrozen)
{
throw DataGridError.DataGrid.CannotAddNonFrozenColumn();
}
}
}
internal void OnColumnFrozenStateChanging(DataGridColumnBase targetColumn)
{
Debug.Assert(targetColumn != null);
CorrectColumnFrozenStates(targetColumn, true);
}
private void CorrectColumnFrozenStates(DataGridColumnBase targetColumn, bool frozenStateChanging)
{
Debug.Assert(targetColumn != null);
DataGridColumnBase column;
if ((targetColumn.IsFrozen && !frozenStateChanging) ||
(!targetColumn.IsFrozen && frozenStateChanging))
{
// make sure the previous visible columns are frozen as well
column = this.ColumnsInternal.GetPreviousVisibleFrozenColumn(targetColumn);
if (column == null)
{
DataGridColumnBase firstVisibleColumn = this.ColumnsInternal.FirstVisibleColumn;
if (firstVisibleColumn != targetColumn)
{
column = firstVisibleColumn;
}
}
while (column != null && this.ColumnsInternal.DisplayInOrder(column.Index, targetColumn.Index))
{
column.IsFrozen = true;
column = this.ColumnsInternal.GetNextVisibleScrollingColumn(column);
}
}
else
{
// make sure the next visible columns are not frozen
column = this.ColumnsInternal.GetNextVisibleScrollingColumn(targetColumn);
if (column == null)
{
DataGridColumnBase lastColumn = targetColumn;
do
{
column = this.ColumnsInternal.GetNextVisibleColumn(lastColumn);
if (column != null)
{
lastColumn = column;
}
}
while (column != null);
if (lastColumn != targetColumn)
{
column = lastColumn;
}
}
while (column != null && this.ColumnsInternal.DisplayInOrder(targetColumn.Index, column.Index))
{
column.IsFrozen = false;
column = this.ColumnsInternal.GetPreviousVisibleFrozenColumn(column);
}
}
}
internal void OnColumnVisibleStateChanged(DataGridColumnBase updatedColumn)
{
Debug.Assert(updatedColumn != null);
//
UpdateColumnHeadersSeparatorVisibility();
PerformLayout();
if (updatedColumn.Visibility == Visibility.Visible &&
this.ColumnsInternal.VisibleColumnCount == 1 && this.CurrentColumnIndex == -1)
{
DataGridRow dataGridRow = GetRowFromItem(this.SelectedItem);
if (dataGridRow != null)
{
SetAndSelectCurrentCell(updatedColumn.Index, dataGridRow.Index, true /*forceCurrentCellSelection*/);
}
else
{
MakeFirstDisplayedCellCurrentCell();
}
}
}
// This method checks to see if the column moving is frozen or if the column is moving into a group
// of frozen columns. It throws an exception in both cases.
private void CorrectColumnFrozenStatesForMove(DataGridColumnBase targetColumn, int newDisplayIndex)
{
Debug.Assert(targetColumn != null);
Debug.Assert(newDisplayIndex != targetColumn.DisplayIndex);
Debug.Assert(!InDisplayIndexAdjustments);
// No check necessary when:
// - column is invisible.
// - DisplayIndex decreases and column is frozen.
// - DisplayIndex increases and column is unfrozen.
if (targetColumn.Visibility == Visibility.Collapsed ||
(newDisplayIndex < targetColumn.DisplayIndex && targetColumn.IsFrozen) ||
(newDisplayIndex > targetColumn.DisplayIndex && !targetColumn.IsFrozen))
{
return;
}
int colCount = this.ColumnsItemsInternal.Count, displayIndex;
if (newDisplayIndex < targetColumn.DisplayIndex)
{
// DisplayIndex decreases.
// Throw an exception if the visible unfrozen column is placed before a frozen column
// Get the closest visible column placed after the displaced column
DataGridColumnBase nextColumn;
displayIndex = newDisplayIndex;
do
{
nextColumn = this.ColumnsInternal.GetColumnAtDisplayIndex(displayIndex);
displayIndex++;
}
while (displayIndex < colCount && (nextColumn == null || nextColumn == targetColumn || nextColumn.Visibility == Visibility.Collapsed));
if (nextColumn != null && nextColumn.IsFrozen)
{
throw DataGridError.DataGrid.CannotMoveNonFrozenColumn();
}
}
else
{
// DisplayIndex increases.
// Throw an exception if the visible frozen column is placed after a non-frozen column
// Get the closest visible column placed before the displaced column
DataGridColumnBase previousColumn;
displayIndex = newDisplayIndex;
do
{
previousColumn = this.ColumnsInternal.GetColumnAtDisplayIndex(displayIndex);
displayIndex--;
}
while (displayIndex >= 0 && (previousColumn == null || previousColumn.Visibility == Visibility.Collapsed));
if (previousColumn != null && !previousColumn.IsFrozen)
{
throw DataGridError.DataGrid.CannotMoveFrozenColumn();
}
}
}
internal void OnColumnWidthChanged(DataGridColumnBase updatedColumn)
{
Debug.Assert(updatedColumn != null);
if (updatedColumn.Visibility == Visibility.Visible)
{
PerformLayout(true /* forceDataCellsHorizontalLayout */);
}
}
//
internal void OnColumnCellStyleChanged(DataGridColumnBase column)
{
// Set HeaderCell.Style for displayed rows if HeaderCell.Style is not already set
for (int childIndex = 0; childIndex < this.DisplayedAndEditedRowCount; childIndex++)
{
DataGridRow row = _cells.Children[childIndex] as DataGridRow;
if (row != null)
{
row.Cells[column.Index].Style = column.CellStyle;
}
}
// Set HeaderCell.Style for prefetched rows if HeaderCell.Style is not already set
foreach (DataGridRow row in _prefetchedRows)
{
row.Cells[column.Index].Style = column.CellStyle;
}
// Simply discard the Recyclable rows. This operation happens less enough that discarding
// the Recyclable rows here shoudln't be too bad
_recyclableRows.Clear();
}
internal void OnInsertedColumn_PreNotification(DataGridColumnBase insertedColumn)
{
// Fix the OldFirstDisplayedScrollingCol
this.DisplayData.CorrectColumnIndexAfterInsertion(insertedColumn.Index, 1);
// Fix the Index of all following columns
CorrectColumnIndexesAfterInsertion(insertedColumn, 1);
Debug.Assert(insertedColumn.Index >= 0);
Debug.Assert(insertedColumn.Index < this.ColumnsItemsInternal.Count);
Debug.Assert(insertedColumn.OwningGrid == this);
if (insertedColumn.DisplayIndex == -1 || insertedColumn.DisplayIndex >= this.ColumnsItemsInternal.Count)
{
// Developer did not assign a DisplayIndex or picked a large number.
// Choose the Index as the DisplayIndex.
insertedColumn.DisplayIndexInternal = insertedColumn.Index;
}
CorrectColumnDisplayIndexesAfterInsertion(insertedColumn);
InsertDisplayedColumnHeader(insertedColumn);
// Insert the missing data cells
if (_rowCount > 0)
{
int newColumnCount = this.ColumnsItemsInternal.Count;
if (_cells != null)
{
//
for (int childIndex = 0; childIndex < this.DisplayedAndEditedRowCount; childIndex++)
{
DataGridRow dataGridRow = this._cells.Children[childIndex] as DataGridRow;
if (dataGridRow.Cells.Count < newColumnCount)
{
AddNewCellPrivate(dataGridRow, insertedColumn);
}
foreach (DataGridCell dataGridCell in dataGridRow.Cells)
{
if (ColumnRequiresRightGridline(dataGridCell.OwningColumn, true /*includeLastRightGridlineWhenPresent*/))
{
dataGridCell.EnsureGridline();
}
}
}
}
}
//
}
private void CorrectColumnIndexesAfterDeletion(DataGridColumnBase deletedColumn)
{
Debug.Assert(deletedColumn != null);
for (int columnIndex = deletedColumn.Index; columnIndex < this.ColumnsItemsInternal.Count; columnIndex++)
{
this.ColumnsItemsInternal[columnIndex].Index = this.ColumnsItemsInternal[columnIndex].Index - 1;
Debug.Assert(this.ColumnsItemsInternal[columnIndex].Index == columnIndex);
}
}
internal void OnRemovedColumn_PreNotification(DataGridColumnBase removedColumn)
{
Debug.Assert(removedColumn.Index >= 0);
Debug.Assert(removedColumn.OwningGrid == null);
// Intentionally keep the DisplayIndex intact after detaching the column.
CorrectColumnIndexesAfterDeletion(removedColumn);
CorrectColumnDisplayIndexesAfterDeletion(removedColumn);
// Fix the OldFirstDisplayedScrollingCol
this.DisplayData.CorrectRowIndexAfterDeletion(removedColumn.Index);
// Fix the existing rows by removing cells at correct index
int newColumnCount = this.ColumnsItemsInternal.Count;
if (this._cells != null)
{
for (int childIndex = 0; childIndex < this.DisplayedAndEditedRowCount; childIndex++)
{
DataGridRow dataGridRow = this._cells.Children[childIndex] as DataGridRow;
if (dataGridRow.Cells.Count > newColumnCount)
{
dataGridRow.Cells.RemoveAt(removedColumn.Index);
}
}
}
//
RemoveDisplayedColumnHeader(removedColumn);
}
private void CorrectColumnIndexesAfterInsertion(DataGridColumnBase insertedColumn, int insertionCount)
{
Debug.Assert(insertedColumn != null);
Debug.Assert(insertionCount > 0);
for (int columnIndex = insertedColumn.Index + insertionCount; columnIndex < this.ColumnsItemsInternal.Count; columnIndex++)
{
this.ColumnsItemsInternal[columnIndex].Index = columnIndex;
}
}
// Returns the column's width + the potential thickness of the right gridline
internal double GetEdgedColumnWidth(DataGridColumnBase dataGridColumn)
{
Debug.Assert(dataGridColumn != null);
return GetEdgedColumnWidth(dataGridColumn, true /*includeLastRightGridlineWhenPresent*/);
}
private bool GetColumnEffectiveReadOnlyState(DataGridColumnBase dataGridColumn)
{
Debug.Assert(dataGridColumn != null);
return this.IsReadOnly || dataGridColumn.IsReadOnly;
}
internal double GetEdgedColumnWidth(DataGridColumnBase dataGridColumn, bool includeLastRightGridlineWhenPresent)
{
Debug.Assert(dataGridColumn != null);
return dataGridColumn.Width + (ColumnRequiresRightGridline(dataGridColumn, includeLastRightGridlineWhenPresent) ? DataGrid.VerticalGridlinesThickness : 0);
}
private void InsertDisplayedColumnHeader(DataGridColumnBase dataGridColumn)
{
Debug.Assert(dataGridColumn != null);
if (this.AreColumnHeadersVisible && _columnHeaders != null)
{
dataGridColumn.HeaderCell.Visibility = dataGridColumn.Visibility;
Debug.Assert(!this._columnHeaders.Children.Contains(dataGridColumn.HeaderCell));
_columnHeaders.Children.Insert(dataGridColumn.DisplayIndex, dataGridColumn.HeaderCell);
}
}