//=======================================================================================
// SelectionValidator implementation
//=======================================================================================
bool SelectionValidator::is_valid_to_add_tie(SelectionSet* pSelection,
ImoNote** ppStartNote,
ImoNote** ppEndNote)
{
//Returns TRUE if current selection is valid for adding a tie.
//If valid, returns pointers to start and end notes, if not NULL parameters received
//Conditions to be valid:
// 1. The first note found can be tied to next one
// 2. If condition 1 is true, the next note must also be in the selection
bool fValid = false;
ImoNote* pStart = NULL;
ImoNote* pEnd = NULL;
ColStaffObjs* pCollection = pSelection->get_staffobjs_collection();
if (pCollection == NULL)
return false;
ColStaffObjsIterator it;
for (it = pCollection->begin(); it != pCollection->end(); ++it)
{
ImoObj* pImo = (*it)->imo_object();
if (pImo->is_note())
{
if (!pStart)
{
//first note found. Verify if it can be tied to next
pStart = static_cast<ImoNote*>(pImo);
if (!pStart->is_tied_next())
{
ImoScore* pScore = pStart->get_score();
ColStaffObjs* pCol = pScore->get_staffobjs_table();
pEnd = ScoreAlgorithms::find_possible_end_of_tie(pCol, pStart);
}
}
else
{
//Start note processed. verify if end note is also in the selection
if (pEnd && pEnd->get_id() == pImo->get_id())
{
fValid = true; //ok. End note is in the selection
break;
}
}
}
}
if (fValid)
{
if (ppStartNote)
*ppStartNote = pStart;
if (ppEndNote)
*ppEndNote = pEnd;
return true;
}
else
return false;
}
//---------------------------------------------------------------------------------------
bool SelectionValidator::is_valid_for_toggle_stem(SelectionSet* pSelection)
{
//Returns TRUE if current selection is valid to toggle stems.
//It is valid if there is at least a note with stem
ColStaffObjs* pCollection = pSelection->get_staffobjs_collection();
if (pCollection == NULL)
return false;
ColStaffObjsIterator it;
for (it = pCollection->begin(); it != pCollection->end(); ++it)
{
ImoObj* pImo = (*it)->imo_object();
if (pImo->is_note())
{
ImoNote* pNote = static_cast<ImoNote*>(pImo);
if (pNote->get_note_type() > k_whole && !pNote->is_in_chord()
&& pNote->get_stem_direction() != k_stem_none)
return true;
}
}
return false;
}