/**
* In a contiguous list of wires, remove wires that backtrack over the previous
* wire. Example:
*
* Wire is added:
* ---------------------------------------->
*
* A second wire backtracks over it:
* -------------------<====================>
*
* RemoveBacktracks is called:
* ------------------->
*/
static void RemoveBacktracks( DLIST<SCH_ITEM>& aWires )
{
SCH_LINE* last_line = NULL;
EDA_ITEM* first = aWires.GetFirst();
for( EDA_ITEM* p = first; p; )
{
SCH_LINE *line = dynamic_cast<SCH_LINE*>( p );
if( !line )
{
wxFAIL_MSG( "RemoveBacktracks() requires SCH_LINE items" );
break;
}
p = line->Next();
if( last_line )
{
wxASSERT_MSG( last_line->GetEndPoint() == line->GetStartPoint(),
"RemoveBacktracks() requires contiguous lines" );
if( IsPointOnSegment( last_line->GetStartPoint(), line->GetStartPoint(),
line->GetEndPoint() ) )
{
last_line->SetEndPoint( line->GetEndPoint() );
delete s_wires.Remove( line );
}
else
last_line = line;
}
else
last_line = line;
}
}
bool SCH_SCREEN::BreakSegment( const wxPoint& aPoint )
{
SCH_LINE* segment;
SCH_LINE* newSegment;
bool brokenSegments = false;
for( SCH_ITEM* item = m_drawList.begin(); item; item = item->Next() )
{
if( (item->Type() != SCH_LINE_T) || (item->GetLayer() == LAYER_NOTES) )
continue;
segment = (SCH_LINE*) item;
if( !segment->HitTest( aPoint, 0 ) || segment->IsEndPoint( aPoint ) )
continue;
// Break the segment at aPoint and create a new segment.
newSegment = new SCH_LINE( *segment );
newSegment->SetStartPoint( aPoint );
segment->SetEndPoint( aPoint );
m_drawList.Insert( newSegment, segment->Next() );
item = newSegment;
brokenSegments = true;
}
return brokenSegments;
}
/**
* Mouse capture callback for drawing line segments.
*/
static void DrawSegment( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition,
bool aErase )
{
SCH_LINE* segment;
if( s_wires.GetCount() == 0 )
return;
segment = (SCH_LINE*) s_wires.begin();
EDA_COLOR_T color = GetLayerColor( segment->GetLayer() );
ColorChangeHighlightFlag( &color, !(color & HIGHLIGHT_FLAG) );
if( aErase )
{
while( segment )
{
if( !segment->IsNull() ) // Redraw if segment length != 0
segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );
segment = segment->Next();
}
}
SCH_EDIT_FRAME* frame = (SCH_EDIT_FRAME*) aPanel->GetParent();
wxPoint endpos = frame->GetCrossHairPosition();
if( frame->GetForceHVLines() ) /* Coerce the line to vertical or horizontal one: */
ComputeBreakPoint( (SCH_LINE*) s_wires.GetLast()->Back(), endpos );
else
( (SCH_LINE*) s_wires.GetLast() )->SetEndPoint( endpos );
segment = (SCH_LINE*) s_wires.begin();
while( segment )
{
if( !segment->IsNull() ) // Redraw if segment length != 0
segment->Draw( aPanel, aDC, wxPoint( 0, 0 ), g_XorMode, color );
segment = segment->Next();
}
}
/**
* In a contiguous list of wires, remove wires that backtrack over the previous
* wire. Example:
*
* Wire is added:
* ---------------------------------------->
*
* A second wire backtracks over it:
* -------------------<====================>
*
* RemoveBacktracks is called:
* ------------------->
*/
static void RemoveBacktracks( DLIST<SCH_ITEM>& aWires )
{
EDA_ITEM* first = aWires.GetFirst();
std::vector<SCH_LINE*> last_lines;
for( EDA_ITEM* p = first; p; )
{
SCH_LINE *line = static_cast<SCH_LINE*>( p );
p = line->Next();
if( !last_lines.empty() )
{
SCH_LINE* last_line = last_lines[last_lines.size() - 1];
bool contiguous = ( last_line->GetEndPoint() == line->GetStartPoint() );
bool backtracks = IsPointOnSegment( last_line->GetStartPoint(),
last_line->GetEndPoint(), line->GetEndPoint() );
bool total_backtrack = ( last_line->GetStartPoint() == line->GetEndPoint() );
if( contiguous && backtracks )
{
if( total_backtrack )
{
delete s_wires.Remove( last_line );
delete s_wires.Remove( line );
last_lines.pop_back();
}
else
{
last_line->SetEndPoint( line->GetEndPoint() );
delete s_wires.Remove( line );
}
}
else
{
last_lines.push_back( line );
}
}
else
{
last_lines.push_back( line );
}
}
}