kicad/eeschema/tools/ee_grid_helper.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2014 CERN
* Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* EE_GRID_HELPER
*
* A helper class for doing grid and object snapping.
*
* It shares its roots with PCBNew's GRID_HELPER, but uses the layers architecture to split
* connectable items from graphic items.
*/
#ifndef __GRID_HELPER_H
#define __GRID_HELPER_H
#include <vector>
#include <math/vector2d.h>
#include <origin_viewitem.h>
#include <ee_selection.h>
class LSET;
class SCH_ITEM;
class SEG;
enum EE_GRID_HELPER_LAYERS : int
{
LAYER_ANY = SCH_LAYER_ID_END + 1,
LAYER_CONNECTABLE,
LAYER_GRAPHICS
};
class EE_GRID_HELPER
{
public:
EE_GRID_HELPER( TOOL_MANAGER* aToolMgr );
~EE_GRID_HELPER();
VECTOR2I GetGrid() const;
VECTOR2I GetOrigin() const;
/**
* Function GetSnapped
* If the EE_GRID_HELPER has highlighted a snap point (target shown), this function
* will return a pointer to the item to which it snapped.
*
* @return NULL if not snapped. Pointer to snapped item otherwise
*/
SCH_ITEM* GetSnapped() const;
void SetAuxAxes( bool aEnable, const VECTOR2I& aOrigin = VECTOR2I( 0, 0 ) );
VECTOR2I Align( const VECTOR2I& aPoint ) const;
VECTOR2I AlignGrid( const VECTOR2I& aPoint ) const;
VECTOR2I AlignToWire( const VECTOR2I& aPoint, const SEG& aSeg );
VECTOR2I BestDragOrigin( const VECTOR2I& aMousePos, int aLayer, const EE_SELECTION& aItems );
VECTOR2I BestSnapAnchor( const VECTOR2I& aOrigin, int aLayer, SCH_ITEM* aDraggedItem );
VECTOR2I BestSnapAnchor( const VECTOR2I& aOrigin, int aLayer, const EE_SELECTION& aSkip = {} );
void SetSkipPoint( const VECTOR2I& aPoint )
{
m_skipPoint = aPoint;
}
/**
* We clear the skip point by setting it to an unreachable position, thereby preventing matching
*/
void ClearSkipPoint()
{
m_skipPoint = VECTOR2I( std::numeric_limits<int>::min(), std::numeric_limits<int>::min() );
}
void SetSnap( bool aSnap ) { m_enableSnap = aSnap; }
void SetUseGrid( bool aSnapToGrid ) { m_enableGrid = aSnapToGrid; }
void SetSnapLine( bool aSnap ) { m_enableSnapLine = aSnap; }
private:
enum ANCHOR_FLAGS {
CORNER = 1,
OUTLINE = 2,
SNAPPABLE = 4,
ORIGIN = 8,
VERTICAL = 16,
HORIZONTAL = 32
};
struct ANCHOR
{
ANCHOR( VECTOR2I aPos, int aFlags = CORNER | SNAPPABLE, SCH_ITEM* aItem = NULL ) :
pos( aPos ),
flags( aFlags ),
item( aItem )
{ };
VECTOR2I pos;
int flags;
SCH_ITEM* item;
double Distance( const VECTOR2I& aP ) const
{
return ( aP - pos ).EuclideanNorm();
}
};
std::set<SCH_ITEM*> queryVisible( const BOX2I& aArea, const EE_SELECTION& aSkip ) const;
void addAnchor( const VECTOR2I& aPos, int aFlags, SCH_ITEM* aItem )
{
m_anchors.emplace_back( ANCHOR( aPos, aFlags, aItem ) );
}
ANCHOR* nearestAnchor( const VECTOR2I& aPos, int aFlags, int aMatchLayer );
/**
* computeAnchors inserts the local anchor points in to the grid helper for the specified
* schematic item, given the reference point and the direction of use for the point.
*
* @param aItem The schematic item for which to compute the anchors
* @param aRefPos The point for which to compute the anchors (if used by the component)
* @param aFrom Is this for an anchor that is designating a source point (aFrom=true) or not
*/
void computeAnchors( SCH_ITEM* aItem, const VECTOR2I& aRefPos, bool aFrom = false );
void clearAnchors()
{
m_anchors.clear();
}
std::vector<ANCHOR> m_anchors;
TOOL_MANAGER* m_toolMgr;
OPT<VECTOR2I> m_auxAxis;
bool m_enableSnap; // Allow snapping to other items on the layers
bool m_enableGrid; // If true, allow snapping to grid
bool m_enableSnapLine; // Allow drawing lines from snap points
ANCHOR* m_snapItem; // Pointer to the currently snapped item in m_anchors
// (NULL if not snapped)
VECTOR2I m_skipPoint; // When drawing a line, we avoid snapping to the source
// point
KIGFX::ORIGIN_VIEWITEM m_viewSnapPoint;
KIGFX::ORIGIN_VIEWITEM m_viewSnapLine;
KIGFX::ORIGIN_VIEWITEM m_viewAxis;
};
#endif