int main()
{
struct SLL* head = NULL; //Ek head declare kardiya bas
InsertEnd(&head,6);
//DeleteEnd(&head);
InsertStart(&head,7);
InsertStart(&head,1);
InsertEnd(&head,4);
InsertAfter(head->next,8);
printList(head);
DeleteEnd(&head);
printf("\n");
printList(head);
DeleteStart(&head);
printf("\n");
printList(head);
DeleteComplete(&head);
printList(head);
return 0;
}
//-------------------------------------------------------------------//
// AddItemsFromDragData() //
//-------------------------------------------------------------------//
// Does the actual work of ripping items from the drag data and
// adding them to the list control.
//-------------------------------------------------------------------//
bool OleListCtrl::AddItemsFromDragData(
int nUnderCursor,
bool bInsertAfter,
CPoint DropPoint
) {
InsertStart();
// Loop variables.
CRect ItemRect;
bool bFirstItem = true;
// If nUnderCursor is not valid, we should be at the bottom of
// the list.
if ( nUnderCursor < 0 )
nUnderCursor = GetItemCount();
// Adjust nUnderCursor to always be before.
if ( bInsertAfter )
nUnderCursor++;
// Add the items to the list.
int i;
for ( i = 0; i < Items.GetSize(); i++ ) {
// Add it to the list.
// The string contains all column text. Break it
// back down.
CString* pstrFull = &Items[i].m_strName;
int nStartPos = pstrFull->Find( ctColumnSeparator );
CString strText = pstrFull->Left( nStartPos );
// We need to include the text and
// the data stored in the lParam.
int nNewIndex = InsertItem(
LVIF_TEXT | LVIF_PARAM, // UINT nMask,
nUnderCursor + i, // int nItem,
LPCTSTR( strText ), // LPCTSTR lpszItem,
0, // UINT nState,
0, // UINT nStateMask,
0, // int nImage,
Items[i].m_lParam // LPARAM lParam
);
ASSERT( nNewIndex == nUnderCursor + i );
// Set the checked state.
CheckItem( nNewIndex, Items[i].m_bChecked );
// Mark all the dropped items as selected.
// WARNING: Don't try to do this until later, so we don't
// end up adding to the original moved selection that is
// to be deleted.
m_vnNewlyDroppedItems.push_back( nNewIndex );
// Set the text of the subitems, if any.
int nStopPos;
int nCol;
for ( nCol = 1; nCol < GetAbsoluteColCount(); nCol++ )
{
// Get the next stop position.
nStopPos = pstrFull->Find( ctColumnSeparator, nStartPos + 1 );
// Extract the col string.
if ( nStopPos == -1 )
strText = pstrFull->Mid( nStartPos + 1 );
else
strText = pstrFull->Mid( nStartPos + 1, nStopPos - nStartPos - 1 );
// Do the deed.
SetItemText( nUnderCursor + i, nCol, strText );
// Set up for next col.
nStartPos = nStopPos;
}
// Set the position of the item based on the drop
// point and the number in the RefItems array.
// The first item needs a different calc. We didn't do it
// outside the loop because it was easier to get the size
// of the item bitmap here.
if ( bFirstItem )
{
// Calculate the starting drop point.
bFirstItem = false;
GetItemRect( 0, &ItemRect, LVIR_ICON );
DropPoint.x -= ( ItemRect.Width() / 2 );
DropPoint.y -= ( ItemRect.Height() / 2 );
} else {
// This aligns multiple items out to the right.
DropPoint.x += ItemRect.Width() + nDropXMargin;
}
// Now set it, if available.
if ( (GetStyle() & LVS_OWNERDATA)==0 )
SetItemPosition( nUnderCursor + i, DropPoint );
// Provide a post-insert-item virtual function.
OnAddDroppedItem( nUnderCursor + i );
}
InsertEnd();
// We want to return true only if we processed items.
// bFirstItem can tell us this.
return !bFirstItem;
}
//-------------------------------------------------------------------//
// BeginDrag()
//-------------------------------------------------------------------//
// This function attempts a drag when the left button has been
// pressed on an item. It returns true if a drag was made.
//-------------------------------------------------------------------//
BOOL OleListCtrl::BeginDrag(
int nUnderCursor,
UINT nKeyFlags
) {
// Attempt a drag.
/////////////////////////////////////////////////////
// Next, we provide a ClipFormat holding the item reference.
// Make sure ClipFormat is ready to go.
ASSERT( ClipFormat != NULL );
// Dump the current selection into drag data array.
ExtractItemsToDragData(
true,
nUnderCursor
);
// To drag, we need a COleDataSource that is loaded with our data.
// Get a new one.
COleDataSource DataSource;
// Put the drag data into the DS.
ArchiveAndRenderClipFormats( &DataSource );
// Now we can clear the previous drag contents.
Items.RemoveAll();
//
/////////////////////////////////////////////////////
// Get the rectangle of the list item.
// This will help us avoid a drag unless the user really means it.
CRect ItemRect;
GetItemRect( nUnderCursor, &ItemRect, LVIR_BOUNDS );
ClientToScreen( &ItemRect );
// Set flags to indicate that we are dragging.
nListItemBeingDragged = nUnderCursor;
bDraggingFromThisList = true;
// Now drag it.
DROPEFFECT deResult = DataSource.DoDragDrop(
DROPEFFECT_COPY | DROPEFFECT_MOVE, // | DROPEFFECT_LINK,
ItemRect
);
InsertStart();
// Indicate that we are no longer dragging.
bDraggingFromThisList = false;
nListItemBeingDragged = -1;
// If it was a move, remove the item(s).
if ( deResult == DROPEFFECT_MOVE )
{
// Delete the current selection, then
// highlight the dragged items.
DeleteOldAndHighlightNew();
}
// Successful drag and drop operation.
if ( deResult != DROPEFFECT_NONE )
{
// Allow derived classes to do any additional clean up steps.
FinishDragAndDrop();
}
InsertEnd();
return ( deResult != DROPEFFECT_NONE );
}
