private void InitializeSizingContext(IHTMLTableCell targetCell)
{
IHTMLTableRow row = TableHelper.GetContainingRowElement(targetCell as IHTMLTableCell);
IHTMLTableCell leftCell = row.cells.item(_pendingLeftColumnIndex, _pendingLeftColumnIndex) as IHTMLTableCell;
_leftColumn = new HTMLTableColumn(_table, leftCell);
if (_pendingRightColumnIndex != -1)
{
IHTMLTableCell rightCell = row.cells.item(_pendingRightColumnIndex, _pendingRightColumnIndex) as IHTMLTableCell;
_rightColumn = new HTMLTableColumn(_table, rightCell);
}
else
{
_rightColumn = null;
}
// force a fixup of cell widths on the next call to ContinueSizing
// (we do this during ContinueSizing so that table column borders don't
// visible "jump" on MouseDown)
_cellWidthsFixed = false;
}
private void HandleMouseMove(TableColumnMouseEventArgs ea)
{
// cell element we are over
IHTMLElement targetCell = GetTargetCell(ea.ClientPoint);
// if there is no element then we are done
if (targetCell == null)
{
// reset state
_sizingOperation.EndSizing();
return;
}
// get the cell and row
IHTMLTableCell cell = targetCell as IHTMLTableCell;
IHTMLTableRow row = TableHelper.GetContainingRowElement(cell);
// convert the client point to cell-local coordinates & calcualte our comparison x values
TableCellEditingElementBehavior cellBehavior = _tableEditingContext.GetCellBehavior(targetCell);
if (cellBehavior == null)
{
_sizingOperation.ClearPending();
return;
}
Point cellLocalMousePt = cellBehavior.TransformGlobalToLocal(ea.ClientPoint);
int cellSpacing = TableHelper.GetAttributeAsInteger(_table.cellSpacing);
int cellSpacingOffset = cellSpacing / 2;
int compareX = cellLocalMousePt.X;
int cellStartX = 0 - cellSpacingOffset;
int cellEndX = targetCell.offsetWidth + cellSpacingOffset;
// if the mouse is near the edge of the cell then update the pending sizing action
// (unless the mouse is near the edge of the first cell where no sizing is supported)
if (MouseNearCellEdge(compareX, cellStartX, cellSpacing) || MouseNearCellEdge(compareX, cellEndX, cellSpacing))
{
if (MouseNearCellEdge(compareX, cellStartX, cellSpacing))
{
if (cell.cellIndex > 0)
{
int leftIndex = cell.cellIndex - 1;
int rightIndex = cell.cellIndex;
_sizingOperation.TrackPending(ea.ClientPoint.X, leftIndex, rightIndex);
ea.Handled = true;
}
else
{
_sizingOperation.ClearPending();
}
}
else if (MouseNearCellEdge(compareX, cellEndX, cellSpacing))
{
int leftIndex = cell.cellIndex;
int rightIndex = cell.cellIndex < (row.cells.length - 1) ? cell.cellIndex + 1 : -1;
_sizingOperation.TrackPending(ea.ClientPoint.X, leftIndex, rightIndex);
ea.Handled = true;
}
}
else // mouse is not near the edge of the cell, reset pending action
{
_sizingOperation.ClearPending();
}
}