160 lines
4.3 KiB
C++
160 lines
4.3 KiB
C++
/*
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* This program source code file is part of KICAD, a free EDA CAD application.
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*
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* Copyright (C) 2017-2019 Kicad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <preview_items/polygon_geom_manager.h>
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#include <geometry/geometry_utils.h>
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POLYGON_GEOM_MANAGER::POLYGON_GEOM_MANAGER( CLIENT& aClient ):
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m_client( aClient ),
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m_leaderMode( LEADER_MODE::DIRECT ),
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m_intersectionsAllowed( true )
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{}
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bool POLYGON_GEOM_MANAGER::AddPoint( const VECTOR2I& aPt )
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{
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// if this is the first point, make sure the client is happy
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// for us to continue
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if( !IsPolygonInProgress() && !m_client.OnFirstPoint( *this ) )
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return false;
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if( m_leaderPts.PointCount() > 1 )
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{
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// there are enough leader points - the next
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// locked-in point is the end of the first leader
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// segment
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m_lockedPoints.Append( m_leaderPts.CPoint( 1 ) );
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}
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else
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{
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// no leader lines, directly add the cursor
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m_lockedPoints.Append( aPt );
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}
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// check for self-intersections
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if( !m_intersectionsAllowed && IsSelfIntersecting( false ) )
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{
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m_lockedPoints.Remove( m_lockedPoints.PointCount() - 1 );
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return false;
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}
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m_client.OnGeometryChange( *this );
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return true;
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}
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void POLYGON_GEOM_MANAGER::SetFinished()
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{
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m_client.OnComplete( *this );
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}
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void POLYGON_GEOM_MANAGER::SetLeaderMode( LEADER_MODE aMode )
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{
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m_leaderMode = aMode;
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}
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bool POLYGON_GEOM_MANAGER::IsSelfIntersecting( bool aIncludeLeaderPts ) const
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{
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auto pts( m_lockedPoints );
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if( aIncludeLeaderPts )
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{
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for( int i = 0; i < m_leaderPts.PointCount(); ++i )
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if( m_leaderPts.CPoint( i ) != pts.CPoint( 0 ) )
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pts.Append( m_leaderPts.CPoint( i ) );
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}
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// line chain needs to be set as closed for proper checks
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pts.SetClosed( true );
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return !!pts.SelfIntersecting();
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}
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void POLYGON_GEOM_MANAGER::SetCursorPosition( const VECTOR2I& aPos, LEADER_MODE aModifier )
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{
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updateLeaderPoints( aPos, aModifier );
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}
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bool POLYGON_GEOM_MANAGER::IsPolygonInProgress() const
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{
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return m_lockedPoints.PointCount() > 0;
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}
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bool POLYGON_GEOM_MANAGER::NewPointClosesOutline( const VECTOR2I& aPt ) const
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{
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return m_lockedPoints.PointCount() > 0 && m_lockedPoints.CPoint( 0 ) == aPt;
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}
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void POLYGON_GEOM_MANAGER::DeleteLastCorner()
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{
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if( m_lockedPoints.PointCount() > 0 )
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{
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m_lockedPoints.Remove( m_lockedPoints.PointCount() - 1 );
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}
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// update the new last segment (was previously
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// locked in), reusing last constraints
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if( m_lockedPoints.PointCount() > 0 )
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{
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updateLeaderPoints( m_leaderPts.CLastPoint() );
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}
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m_client.OnGeometryChange( *this );
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}
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void POLYGON_GEOM_MANAGER::Reset()
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{
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m_lockedPoints.Clear();
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m_leaderPts.Clear();
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m_client.OnGeometryChange( *this );
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}
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void POLYGON_GEOM_MANAGER::updateLeaderPoints( const VECTOR2I& aEndPoint, LEADER_MODE aModifier )
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{
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wxCHECK( m_lockedPoints.PointCount() > 0, /*void*/ );
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const VECTOR2I& lastPt = m_lockedPoints.CLastPoint();
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auto newEnd = VECTOR2I( aEndPoint );
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if( m_leaderMode == LEADER_MODE::DEG45 || aModifier == LEADER_MODE::DEG45 )
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{
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const VECTOR2I lineVector( aEndPoint - lastPt );
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// get a restricted 45/H/V line from the last fixed point to the cursor
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newEnd = lastPt + GetVectorSnapped45( lineVector );
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}
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// direct segment
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m_leaderPts = SHAPE_LINE_CHAIN( lastPt, newEnd );
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m_client.OnGeometryChange( *this );
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}
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