/// <summary>
/// This is in response to focused cell change because of Keyboard navigation.
/// </summary>
private void FocusCellChanged()
{
this.selectedRanges.Clear();
this.anchorPoint = this.ReportGrid.CurrentReportCell.Rect.Center();
this.currentSelectedCell = this.ReportGrid.CurrentReportCell;
}
/// <summary>
/// Handles the mouse button being pressed.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
{
// This state variable will control how the 'Mouse Move' and 'Mouse Up' event handlers interpret the user action. The
// 'selectedColumn' field is used as the starting point for any drag-and-drop type of operation.
this.mouseState = MouseState.ButtonDown;
// Evaluate the state of the keyboard. Key combinations involving the shift and control keys will alter the areas that
// are selected.
bool isShiftKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift);
bool isControlKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control);
// The mouse selected with the mouse button is used as an anchor point unless the shift key is pressed. The anchor
// point allows for ranges of columns to be selected. Everything between the anchor and the currently selected column
// will be selected when the shift key is down. This is modeled after the Excel extended range selection keys.
Point mouseDownLocation = e.GetPosition(this);
// Do not clear the select cells in the Report Grid if the right mouse button is pressed.
if (e.RightButton != MouseButtonState.Pressed)
{
//Since the user is selecting a cell, it will invalidate any row selection that there may be.
foreach (List <ReportRow> block in this.ReportGrid.SelectedRowBlocks)
{
foreach (ReportRow row in block)
{
foreach (ReportCell cell in row.Cells)
{
cell.IsSelected = false;
}
}
}
this.ReportGrid.SelectedRowBlocks.Clear();
this.ReportGrid.SelectedRowHeaderBlocks.Clear();
}
if (!isShiftKeyPressed)
{
IInputElement iInputElement = this.InputHitTest(mouseDownLocation);
DependencyObject dependencyObject = iInputElement as DependencyObject;
while (dependencyObject != null)
{
ReportCell reportCell = DynamicReport.GetCell(dependencyObject);
if (reportCell != null)
{
Keyboard.Focus(dependencyObject as IInputElement);
currentSelectedCell = reportCell;
break;
}
dependencyObject = VisualTreeHelper.GetParent(dependencyObject);
}
this.anchorPoint = mouseDownLocation;
}
// The shift and control key extend the selection operation in the same way as Microsoft Excel.
if (isShiftKeyPressed || isControlKeyPressed)
{
// When the shift key is pressed during column selection, every column between the last column selected
// and the current column is selected.
if (isShiftKeyPressed)
{
// This is an ordered rectangle that encompasses all the selected cells.
Rect selectedRectangle = GetSelectionRectangle(mouseDownLocation);
SetSelectedRectangle(selectedRectangle);
}
// When the control key is pressed a single column is added to the range of columns selected.
if (isControlKeyPressed)
{
// A point marks the range when the control key is pressed. This is almost identical to pressing the mouse
// button except the previous ranges are not cleared. This is part of the extended selection algorithm that is
// modeled after Excel.
Rect selectedRange = new Rect(mouseDownLocation, new Size(0, 0));
// This removes any previous instance of this column in the selection.
foreach (Rect existingRange in this.selectedRanges)
{
if (selectedRange == existingRange)
{
this.selectedRanges.Remove(existingRange);
break;
}
}
// The new range becomes the starting point for any further extended selection operations.
this.selectedRanges.Add(selectedRange);
}
// This instructs the event handlers how the mouse movement is to be interpreted.
this.mouseState = MouseState.Selecting;
}
else
{
// Evaluate if we need to be able to determine the when we right click within the currently selected range then do not clear the selectedRanges.
if (!((e.RightButton == MouseButtonState.Pressed) && (CurrentSelectedCell != null) && (CurrentSelectedCell.IsSelected))) //MIGHT try this --> if (reportCell.Rect.IntersectsWith(selectedRange))
{
// Clear the selected ranges as we do not have a right mouse button pressed with the currently Selected ranges.
// A simple selection that doesn't involve the modifier keys will clear out any previously selected ranges.
this.selectedRanges.Clear();
// The column is added at the start of a new range of selected columns.
this.selectedRanges.Add(new Rect(mouseDownLocation, new Size(0, 0)));
}
}
// Evaluate if we need to be able to determine the when we right click within the currently selected range then do not clear the selectedRanges.
if (!((e.RightButton == MouseButtonState.Pressed) && (CurrentSelectedCell != null) && (CurrentSelectedCell.IsSelected))) //MIGHT try this --> if (reportCell.Rect.IntersectsWith(selectedRange))
{
// This will select all the columns in the selected ranges of columns and remove the selection from all the rest of the cells.
SelectCells();
}
}
/// <summary>
/// Create the event arguments.
/// </summary>
/// <param name="row">The row the cell is in.</param>
/// <param name="cell">The cell itself.</param>
/// <param name="property">The property that changed.</param>
public ReportCellPropertyChangedEventArgs(ReportRow row, ReportCell cell, String property)
{
this.row = row;
this.cell = cell;
this.property = property;
}
/// <summary>
/// Handles the mouse button being pressed.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
{
// This gets the location of the mouse in document coordinates.
Mouse.Capture(this);
// This state variable will control how the 'Mouse Move' and 'Mouse Up' event handlers interpret the user action. The
// 'selectedColumn' field is used as the starting point for any drag-and-drop type of operation.
this.mouseState = MouseState.ButtonDown;
// Evaluate the state of the keyboard. Key combinations involving the shift and control keys will alter the areas that
// are selected.
bool isShiftKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift);
bool isControlKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control);
// The mouse selected with the mouse button is used as an anchor point unless the shift key is pressed. The anchor
// point allows for ranges of columns to be selected. Everything between the anchor and the currently selected column
// will be selected when the shift key is down. This is modeled after the Excel extended range selection keys.
this.mouseDownLocation = e.GetPosition(this);
if (!isShiftKeyPressed)
{
this.anchorPoint = this.mouseDownLocation;
}
// The mouse indicates which column has been selected and the anchor indicates the starting point of the selection in
// an extended selection operation.
ReportColumn selectedColumn = this.ReportGrid.Columns.FindColumnAt(this.mouseDownLocation.X);
this.anchorColumn = this.ReportGrid.Columns.FindColumnAt(this.anchorPoint.X);
// Every cell that appears in the header canvas is considered part of the selectable header. This will collect all the
// selected cells in a list while creating a rectangle that is the union of all those selected cells.
this.headerCells.Clear();
foreach (ReportRow reportRow in this.ReportGrid.Rows)
{
ReportCell reportCell = reportRow[this.anchorColumn];
if (reportRow.Top < this.ActualHeight)
{
this.headerCells.Add(reportCell);
}
}
// Every cell that appears in the header canvas is considered part of the selectable header. This will collect all the
// selected cells in a list while creating a rectangle that is the union of all those selected cells.
Rect selectedRect = this.headerCells[0].Rect;
for (int index = 1; index < this.headerCells.Count; index++)
{
selectedRect = Rect.Union(selectedRect, this.headerCells[index].Rect);
}
// If a column is selected then the position and movement of the mouse will suggest one of several gestures that need
// to be interpreted: is a column being moved, is it being resized, is it being deleted or selected? The code below
// will begin to interpret the input gesture.
if (selectedColumn != null)
{
// The header has two modes: when the headers are frozen, only selection operations are enabled with the mouse.
// When not frozen, the columns can be moved, resized, resorted and removed.
if (this.IsHeaderFrozen)
{
// The shift and control key extend the selection operation in the same way as Microsoft Excel.
if (isShiftKeyPressed || isControlKeyPressed)
{
// When the shift key is pressed during column selection, every column between the last column selected
// and the current column is selected.
if (isShiftKeyPressed)
{
// In the unlikely event that the shift key was down during the setting of the anchor point, this will
// create a dummy entry in the list of selected column ranges.
if (this.selectedRanges.Count == 0)
{
List <ReportColumn> reportColumns = new List <ReportColumn>();
reportColumns.Add(selectedColumn);
this.selectedRanges.Add(reportColumns);
}
// The most recent range will be replaced with a new range when the mouse is dragged around the column
// headers. This has the effect of clearing the columns that are no longer selected and selecting only
// the columns between the anchor and the currently selected column.
List <ReportColumn> lastRange = this.selectedRanges[this.selectedRanges.Count - 1];
int firstIndex = this.ReportGrid.Columns.IndexOf(this.anchorColumn);
int secondIndex = this.ReportGrid.Columns.IndexOf(selectedColumn);
int startIndex = firstIndex < secondIndex ? firstIndex : secondIndex;
int endIndex = firstIndex > secondIndex ? firstIndex : secondIndex;
// This will replace the last range in the list with the new range selected from the current position
// and the anchor position.
lastRange.Clear();
for (int index = startIndex; index <= endIndex; index++)
{
lastRange.Add(this.ReportGrid.Columns[index] as ReportColumn);
}
}
// When the control key is pressed a single column is added to the range of columns selected.
if (isControlKeyPressed)
{
// This removes any previous instance of this column in the selection.
foreach (List <ReportColumn> columnRange in this.selectedRanges)
{
if (columnRange.Contains(selectedColumn))
{
columnRange.Remove(selectedColumn);
}
}
// The column is added (or re-added) at the start of the range of selected columns.
List <ReportColumn> reportColumns = new List <ReportColumn>();
reportColumns.Add(selectedColumn);
this.selectedRanges.Add(reportColumns);
}
}
else
{
// A simple selection that doesn't involve the modifier keys will clear out any previously selected ranges.
selectedRanges.Clear();
// The column is added at the start of a new range of selected columns.
List <ReportColumn> reportColumns = new List <ReportColumn>();
reportColumns.Add(selectedColumn);
this.selectedRanges.Add(reportColumns);
}
// This will select all the columns in the selected ranges of columns and remove the selection from all the
// rest of the cells.
SelectCells();
// This instructs the event handlers how the mouse movement is to be interpreted.
this.mouseState = MouseState.Selecting;
}
else
{
// The left mouse button can either select the column or begin a resizing operation. This will perform a 'Hit
// Test' to see which operation should be performed.
if (e.LeftButton == MouseButtonState.Pressed)
{
// This is a 'Hit Test' for the right edge of the column header tile to see if the user is trying to
// change the size of the column. If the mouse is close to the right edge, then the drag operation to
// change the size of the tile is begun.
if (selectedColumn.Right - DynamicReport.splitBorder <= this.mouseDownLocation.X &&
this.mouseDownLocation.X < selectedColumn.Right)
{
this.resizeStart = selectedColumn.Right;
this.mouseState = MouseState.ResizingColumn;
this.destinationColumn = null;
}
else
{
// This is a 'Hit Test' for the left edge of the column header tile to see if the user is trying to
// change the size of the column. Note that because the left edge really belongs to the previous
// column header when resizing, that the previous column is selected for the operation.
if (selectedColumn.Left <= this.mouseDownLocation.X &&
this.mouseDownLocation.X < selectedColumn.Left + DynamicReport.splitBorder)
{
this.resizeStart = selectedColumn.Left;
this.mouseState = MouseState.ResizingColumn;
int index = this.ReportGrid.Columns.IndexOf(selectedColumn);
if (index != 0)
{
this.anchorColumn = this.ReportGrid.Columns[index - 1] as ReportColumn;
this.destinationColumn = null;
}
}
}
}
// At this point, a resizing operation has been selected from the input gesture of the mouse.
if (this.mouseState == MouseState.ResizingColumn)
{
// The parent window will watch for this event to tell it how to draw the column width indicator lines. The
// dimension and location of those lines are outside of this window and must be handled by the parent.
if (this.ResizeMouseMove != null)
{
this.ResizeMouseMove(this, new ResizeColumnEventArgs(this.anchorColumn, this.anchorColumn.Width,
false));
}
// This window provides quantitative feedback for the new width of the column. The offsets were arrived at
// empirically from reverse engineering Excel.
this.columnWidthPopup.HorizontalOffset = this.mouseDownLocation.X - 2.0;
this.columnWidthPopup.Content = selectedColumn.Width;
this.columnWidthPopup.IsOpen = true;
}
else
{
// This will select the button momentarily for drag-and-drop and sorting operations.
foreach (ReportCell reportCell in this.headerCells)
{
reportCell.IsSelected = true;
}
}
}
}
}
/// <summary>
/// Handles the mouse button being pressed.
/// </summary>
/// <param name="e">The event arguments.</param>
protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
{
// The sort order is maintained in this structure.
this.sortOrder = new List <SortItem>();
// This gets the location of the mouse in document coordinates.
Mouse.Capture(this);
// This state variable will control how the 'Mouse Move' and 'Mouse Up' event handlers interpret the user action. The
// 'selectedRow' field is used as the starting point for any drag-and-drop type of operation.
this.mouseState = MouseState.ButtonDown;
// Evaluate the state of the keyboard. Key combinations involving the shift and control keys will alter the areas that
// are selected.
bool isShiftKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift);
bool isControlKeyPressed = ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control);
// This will use the current position for an anchor unless the shift key is pressed.
this.mouseDownLocation = e.GetPosition(this);
if (!isShiftKeyPressed)
{
this.anchorPoint = this.mouseDownLocation;
}
// The mouse indicates which column has been selected and the anchor indicates the starting point of the selection in
// an extended selection operation.
ReportRow selectedRow = this.ReportGrid.Rows.FindRowAt(this.mouseDownLocation.Y);
ReportRow anchorRow = this.ReportGrid.Rows.FindRowAt(this.anchorPoint.Y);
Point mouseDownLocation = e.GetPosition(this);
if (!isShiftKeyPressed)
{
IInputElement iInputElement = this.InputHitTest(mouseDownLocation);
DependencyObject dependencyObject = iInputElement as DependencyObject;
while (dependencyObject != null)
{
if (DynamicReport.GetCell(dependencyObject) != null)
{
Keyboard.Focus(dependencyObject as IInputElement);
break;
}
dependencyObject = VisualTreeHelper.GetParent(dependencyObject);
}
}
// Every cell that appears in the header canvas is considered part of the selectable header. This will collect all the
// selected cells in a list while creating a rectangle that is the union of all those selected cells.
this.headerCells.Clear();
foreach (ReportColumn reportColumn in this.ReportGrid.Columns)
{
ReportCell reportCell = selectedRow[reportColumn];
if (reportColumn.Left < this.ActualWidth)
{
this.headerCells.Add(reportCell);
}
}
// If a row is selected then the position and movement of the mouse will suggest one of several gestures that need
// to be interpreted: is a row being moved, is it being resized, is it being deleted or selected? The code below
// will begin to interpret the input gesture.
if (selectedRow != null)
{
// The header has two modes: when the headers are frozen, only selection operations are enabled with the mouse.
// When not frozen, the rows can be moved, resized, resorted and removed.
if (this.IsHeaderFrozen)
{
// The shift and control key extend the selection operation in the same way as Microsoft Excel.
if (isShiftKeyPressed || isControlKeyPressed)
{
// When the shift key is pressed during row selection, every row between the last row selected
// and the current row is selected.
if (isShiftKeyPressed)
{
// In the unlikely event that the shift key was down during the setting of the anchor point, this will
// create a dummy entry in the list of selected row ranges.
if (this.selectedRanges.Count == 0)
{
List <ReportRow> reportRows = new List <ReportRow>();
reportRows.Add(selectedRow);
this.selectedRanges.Add(reportRows);
}
// The most recent range will be replaced with a new range when the mouse is dragged around the row
// headers. This has the effect of clearing the rows that are no longer selected and selecting only
// the rows between the anchor and the currently selected row.
List <ReportRow> lastRange = this.selectedRanges[this.selectedRanges.Count - 1];
// This will select each row between the last selected row and the one just selected. Note that the
// list of rows is distinct, so duplicate rows are ignored.
ReportRow firstRow = anchorRow.Top < selectedRow.Top ? anchorRow : selectedRow;
ReportRow secondRow = anchorRow.Top < selectedRow.Top ? selectedRow : anchorRow;
lastRange.Clear();
foreach (ReportRow reportRow in this.ReportGrid.Rows)
{
if (firstRow.Top <= reportRow.Top && reportRow.Top <= secondRow.Top)
{
lastRange.Add(reportRow);
}
}
}
// When the control key is pressed a single row is added to the range of rows selected.
if (isControlKeyPressed)
{
// This removes any previous instance of this row in the selection.
foreach (List <ReportRow> rowRange in this.selectedRanges)
{
if (rowRange.Contains(selectedRow))
{
rowRange.Remove(selectedRow);
}
}
// The row is added (or re-added) at the start of the range of selected rows.
List <ReportRow> reportRows = new List <ReportRow>();
reportRows.Add(selectedRow);
this.selectedRanges.Add(reportRows);
}
}
else
{
// The row is added at the start of a new range of selected rows.
List <ReportRow> reportRows = new List <ReportRow>();
// The if condition below fixes issue that allows the right click to not clear the selected rows.
// Hence it allows every other condition to clear the state.
if (e.RightButton != MouseButtonState.Pressed)
{
// A simple selection that doesn't involve the modifier keys will clear out any previously selected ranges.
this.selectedRanges.Clear();
}
else
{
// This removes any previous instance of this row in the selection.
foreach (List <ReportRow> rowRange in this.selectedRanges)
{
if (rowRange.Contains(selectedRow))
{
rowRange.Remove(selectedRow);
}
}
}
reportRows.Add(selectedRow);
this.selectedRanges.Add(reportRows);
}
// This will select all the rows in the selected ranges of rows and remove the selection from all the
// rest of the cells.
SelectRows();
// This instructs the event handlers how the mouse movement is to be interpreted.
this.mouseState = MouseState.Selecting;
}
else
{
// The top mouse button can either select the row or begin a resizing operation. This will perform a 'Hit
// Test' to see which operation should be performed.
if (e.LeftButton == MouseButtonState.Pressed)
{
// This is a 'Hit Test' for the bottom edge of the row header tile to see if the user is trying to change
// the size of the row. If the mouse is close to the bottom edge, then the drag operation to change the
// size of the tile is begun.
if (selectedRow.Bottom - DynamicReport.splitBorder <= this.mouseDownLocation.Y &&
this.mouseDownLocation.Y < selectedRow.Bottom)
{
this.resizeStart = selectedRow.Bottom;
this.mouseState = MouseState.ResizingRow;
this.destinationRow = null;
}
else
{
// This is a 'Hit Test' for the top edge of the row header tile to see if the user is trying to change
// the size of the row. Note that because the top edge really belongs to the previous row header when
// resizing, that the previous row is selected for the operation.
if (selectedRow.Top <= this.mouseDownLocation.Y &&
this.mouseDownLocation.Y < selectedRow.Top + DynamicReport.splitBorder)
{
this.resizeStart = selectedRow.Top;
this.mouseState = MouseState.ResizingRow;
foreach (ReportRow reportRow in this.ReportGrid.Rows)
{
if (reportRow.Bottom == selectedRow.Top)
{
selectedRow = reportRow;
}
}
this.destinationRow = null;
}
}
}
// At this point, a resizing operation has been selected from the input gesture of the mouse.
if (this.mouseState == MouseState.ResizingRow)
{
// The parent window will watch for this event to tell it how to draw the row width indicator lines. The
// dimension and location of those lines are outside of this window and must be handled by the parent.
if (this.ResizeMouseMove != null)
{
this.ResizeMouseMove(this, new ResizeRowEventArgs(selectedRow, selectedRow.Height,
false));
}
// This window provides quantitative feedback for the new width of the row. The offsets were arrived at
// empirically from reverse engineering Excel.
this.rowHeightPopup.VerticalOffset = this.mouseDownLocation.Y - 2.0;
this.rowHeightPopup.Content = selectedRow.Height;
this.rowHeightPopup.IsOpen = true;
}
else
{
// This will select the button momentarily for drag-and-drop and sorting operations.
foreach (ReportCell reportCell in this.headerCells)
{
reportCell.IsSelected = true;
}
}
}
}
}
