/*****************************************************************************
This may delete one or more rows depending on the makeup of the tree branch.
It's analagous to deleting a file directory with all files and sub-directories
deleted, too.
*****************************************************************************/
int CTreeColumn::DeleteTreeBranch( int aiRow, // Row that the tree branch begins on
BOOL abRedraw) // T=redraw; F=don't
// returns: nbr of rows deleted
{
ASSERT( aiRow >= -1);
ASSERT( m_pGrid != NULL); // Must call TreeSetup(), first
if( aiRow < m_iFixedRowCount
|| aiRow >= m_iRowCount)
return 0;
int iRowDeleteCount = 0;
m_bAllowDraw = FALSE; // prevents crash during reset
// get level of initial row to delete from tree
CGridTreeCell* pGridTreeCell = (CGridTreeCell*)m_pGrid->GetCell( aiRow, m_iColumnWithTree);
unsigned char ucLevelCurrent = CHAR_MAX;
if( pGridTreeCell != NULL)
{
// delete just the parent
ucLevelCurrent = pGridTreeCell->GetLevel();
if( m_pGrid->DeleteRow( aiRow) )
{
iRowDeleteCount++;
m_iRowCount--;
}
}
// see if any children need to be deleted, too
unsigned char ucLevel;
while( aiRow < m_iRowCount)
{
pGridTreeCell = (CGridTreeCell*)m_pGrid->GetCell( aiRow, m_iColumnWithTree);
if( pGridTreeCell == NULL)
break;
ucLevel = pGridTreeCell->GetLevel();
if( ucLevel <= ucLevelCurrent)
break;
if( !m_pGrid->DeleteRow( aiRow) )
break;
iRowDeleteCount++;
m_iRowCount--;
}
ASSERT( m_iRowCount == m_pGrid->GetRowCount() );
// have to re-number all cells below deletion point
if( iRowDeleteCount > 0)
{
int iRow;
int iColumnCount = m_pGrid->GetColumnCount();
for( iRow=aiRow; iRow < m_iRowCount; iRow++)
{
int iCol;
for (iCol = 0; iCol < iColumnCount; iCol++)
{
CGridCellBase* pGridCellBase = m_pGrid->GetCell( iRow, iCol);
if( pGridCellBase != NULL)
{
pGridCellBase->SetCoords( iRow, iCol);
}
}
}
}
m_bAllowDraw = TRUE;
TreeRefreshRows();
if( abRedraw)
m_pGrid->Invalidate();
return iRowDeleteCount;
}
/*****************************************************************************
3/2001: Allows one to add to the existing tree structure. Repeatedly
calling TreeSetup() with different tree configurations was the only way to
change the tree structure with the original implementation, but had the
disadvantage of destroying cell contents. The original implementation
forced you to NOT store data directly in grid cells if you wished to
change the tree.
No validation of the tree branch "levels" done. Drawing code assumes
a parent / child relationship of tree nodes. Thus, if the lines of
the tree don't look right, make sure that the parent / child relationship
is not violated.
*****************************************************************************/
int CTreeColumn::InsertTreeBranch(
const unsigned char* apucTreeLevelAry, // Tree Level data array --
// must have aiNbrElements of entries
int aiNbrElements, // NUmber of tree elements to add
int aiRow, // insert tree elements beginning at this row
// If -1, append to end; If 0, Insert
// at top no matter how many fixed rows
BOOL abRedraw) // T=redraw; F=don't
// returns: row where elements inserted; -1 on error
{
ASSERT( apucTreeLevelAry != NULL);
ASSERT( aiNbrElements >= 0);
ASSERT( aiRow >= -1);
ASSERT( m_pGrid != NULL); // Must call TreeSetup(), first
ASSERT( m_iFixedRowCount >= 0);
ASSERT( m_pRuntimeClassTreeCell != NULL);
if( aiNbrElements <= 0)
return -1;
// if user specified 0 or -1, adjust
int iRowForAppend = 0;
if( m_iRowCount <= m_iFixedRowCount)
aiRow = -1; // if no non-fixed rows, then gotta append
if( aiRow <= -1)
{
iRowForAppend = -1;
aiRow = m_iRowCount;
}
else if( aiRow < m_iFixedRowCount)
aiRow = m_iFixedRowCount;
m_bAllowDraw = FALSE; // prevents crash during reset
// retain old cell properties: establishes size for
// tree drawing box based on current font
CGridTreeCell GridCellCopy;
GridCellCopy.SetTreeColumn( this);
CGridCellBase* pCurrCell = m_pGrid->GetCell( m_iRowCount-1, m_iColumnWithTree);
if (pCurrCell)
GridCellCopy = *pCurrCell;
// insert rows while replacing tree column cells to tree cell type
int iCellRow = aiRow;
int i1;
for( i1=0; i1 < aiNbrElements; i1++)
{
// CGridCtrl's InsertRow() requires a -1 to append values to
// the end of the grid
if( iRowForAppend != -1)
iRowForAppend = iCellRow;
if( m_pGrid->InsertRow( "", iRowForAppend) < 0)
{
aiRow = -1; // error
break;
}
if( !m_pGrid->SetCellType( iCellRow,
m_iColumnWithTree,
m_pRuntimeClassTreeCell ) )
{
aiRow = -1; // error
break;
}
CGridTreeCell* pGridTreeCell = (CGridTreeCell*)m_pGrid->GetCell( iCellRow, m_iColumnWithTree);
if( pGridTreeCell != NULL)
{
pGridTreeCell->SetTreeColumn( this);
pGridTreeCell->SetLevelAndHide( *apucTreeLevelAry );
pGridTreeCell->SetViewable( TRUE);
}
iCellRow++;
m_iRowCount++;
apucTreeLevelAry++;
}
ASSERT( m_iRowCount == m_pGrid->GetRowCount() );
// have to re-number all cells below insertion point
if( aiRow > 0)
{
int iRow;
int iColumnCount = m_pGrid->GetColumnCount();
for( iRow=iCellRow; iRow < m_iRowCount; iRow++)
{
int iCol;
for (iCol = 0; iCol < iColumnCount; iCol++)
{
CGridCellBase* pGridCellBase = m_pGrid->GetCell( iRow, iCol);
if( pGridCellBase != NULL)
{
pGridCellBase->SetCoords( iRow, iCol);
}
}
}
}
m_bAllowDraw = TRUE;
TreeRefreshRows();
if( abRedraw)
m_pGrid->Invalidate();
return aiRow;
}
