int SCH_SCREEN::CountConnectedItems( const wxPoint& aPos, bool aTestJunctions ) const
{
SCH_ITEM* item;
int count = 0;
for( item = m_drawList.begin(); item; item = item->Next() )
{
if( item->Type() == SCH_JUNCTION_T && !aTestJunctions )
continue;
if( item->IsConnected( aPos ) )
count++;
}
return count;
}
void SCH_SCREEN::addConnectedItemsToBlock( const wxPoint& position )
{
SCH_ITEM* item;
ITEM_PICKER picker;
bool addinlist = true;
for( item = m_drawList.begin(); item; item = item->Next() )
{
picker.SetItem( item );
if( !item->IsConnectable() || !item->IsConnected( position )
|| (item->GetFlags() & SKIP_STRUCT) )
continue;
if( item->IsSelected() && item->Type() != SCH_LINE_T )
continue;
// A line having 2 ends, it can be tested twice: one time per end
if( item->Type() == SCH_LINE_T )
{
if( ! item->IsSelected() ) // First time this line is tested
item->SetFlags( SELECTED | STARTPOINT | ENDPOINT );
else // second time (or more) this line is tested
addinlist = false;
SCH_LINE* line = (SCH_LINE*) item;
if( line->GetStartPoint() == position )
item->ClearFlags( STARTPOINT );
else if( line->GetEndPoint() == position )
item->ClearFlags( ENDPOINT );
}
else
item->SetFlags( SELECTED );
if( addinlist )
{
picker.SetFlags( item->GetFlags() );
m_BlockLocate.GetItems().PushItem( picker );
}
}
}
void SCH_SCREEN::addConnectedItemsToBlock( const SCH_ITEM* aItem, const wxPoint& position )
{
SCH_ITEM* item;
ITEM_PICKER picker;
for( item = m_drawList.begin(); item; item = item->Next() )
{
if( !item->IsConnectable() || ( item->GetFlags() & SKIP_STRUCT )
|| !item->CanConnect( aItem ) || item == aItem )
continue;
// A line having 2 ends, it can be tested twice: one time per end
if( item->Type() == SCH_LINE_T )
{
SCH_LINE* line = (SCH_LINE*) item;
if( !item->HitTest( position ) )
continue;
// First time through. Flags set to denote an end that is not moving
if( !item->IsSelected() )
item->SetFlags( CANDIDATE | STARTPOINT | ENDPOINT );
if( line->GetStartPoint() == position )
item->ClearFlags( STARTPOINT );
else if( line->GetEndPoint() == position )
item->ClearFlags( ENDPOINT );
else
// This picks up items such as labels that can connect to the middle of a line
item->ClearFlags( STARTPOINT | ENDPOINT );
}
// We want to move a mid-connected label or bus entry when the full line is being moved
else if( !item->IsSelected()
&& aItem->Type() == SCH_LINE_T
&& !( aItem->GetFlags() & ( ENDPOINT | STARTPOINT ) ) )
{
std::vector< wxPoint > connections;
item->GetConnectionPoints( connections );
for( auto conn : connections )
{
if( aItem->HitTest( conn ) )
{
item->SetFlags( CANDIDATE );
break;
}
}
}
if( item->IsSelected() )
continue;
if( ( item->GetFlags() & CANDIDATE ) || item->IsConnected( position ) ) // Deal with all non-line items
{
item->ClearFlags( CANDIDATE );
item->SetFlags( SELECTED );
picker.SetItem( item );
picker.SetFlags( item->GetFlags() );
m_BlockLocate.GetItems().PushItem( picker );
}
}
}
bool SCH_SCREEN::IsJunctionNeeded( const wxPoint& aPosition, bool aNew )
{
bool has_nonparallel[2] = { false };
int end_count[2] = { 0 };
int pin_count = 0;
std::vector<SCH_LINE*> lines[2];
for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
{
if( item->GetFlags() & STRUCT_DELETED )
continue;
if( aNew && ( item->Type() == SCH_JUNCTION_T ) && ( item->HitTest( aPosition ) ) )
return false;
if( ( item->Type() == SCH_LINE_T )
&& ( item->HitTest( aPosition, 0 ) ) )
{
if( item->GetLayer() == LAYER_WIRE )
lines[0].push_back( (SCH_LINE*) item );
else if( item->GetLayer() == LAYER_BUS )
lines[1].push_back( (SCH_LINE*) item );
}
if( ( item->Type() == SCH_COMPONENT_T )
&& ( item->IsConnected( aPosition ) ) )
pin_count++;
}
for( int i = 0; i < 2; i++ )
{
bool removed_overlapping = false;
end_count[i] = lines[i].size();
for( auto line = lines[i].begin(); line < lines[i].end(); line++ )
{
// Consider ending on a line to be equivalent to two endpoints because
// we will want to split the line if anything else connects
if( !(*line)->IsEndPoint( aPosition ) )
end_count[i]++;
for( auto second_line = lines[i].end() - 1; second_line > line; second_line-- )
{
if( !(*line)->IsParallel( *second_line ) )
has_nonparallel[i] = true;
else if( !removed_overlapping
&& (*line)->IsSameQuadrant( *second_line, aPosition ) )
{
/**
* Overlapping lines that point in the same direction should not be counted
* as extra end_points. We remove the overlapping lines, being careful to only
* remove them once.
*/
removed_overlapping = true;
end_count[i]--;
}
}
}
}
//
// If there are three or more endpoints
if( pin_count + end_count[0] > 2 )
return true;
// If there is at least one segment that ends on a non-parallel line or
// junction of two other lines
if( has_nonparallel[0] && end_count[0] > 2 )
return true;
// Check for bus - bus junction requirements
if( has_nonparallel[1] && end_count[1] > 2 )
return true;
return false;
}