kicad/include/tool/grid_helper.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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
*/
#ifndef GRID_HELPER_H
#define GRID_HELPER_H
#include <tool/tool_manager.h>
#include <vector>
#include <math/vector2d.h>
#include <origin_viewitem.h>
class TOOL_MANAGER;
class EDA_ITEM;
class GRID_HELPER
{
public:
GRID_HELPER( TOOL_MANAGER* aToolMgr );
virtual ~GRID_HELPER();
VECTOR2I GetGrid() const;
VECTOR2D GetVisibleGrid() const;
VECTOR2I GetOrigin() const;
void SetAuxAxes( bool aEnable, const VECTOR2I& aOrigin = VECTOR2I( 0, 0 ) );
virtual VECTOR2I Align( const VECTOR2I& aPoint ) const;
virtual VECTOR2I Align( const VECTOR2I& aPoint, const VECTOR2D& aGrid,
const VECTOR2D& aOffset ) const;
VECTOR2I AlignGrid( const VECTOR2I& aPoint ) const;
VECTOR2I AlignGrid( const VECTOR2I& aPoint, const VECTOR2D& aGrid,
const VECTOR2D& aOffset ) const;
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; }
bool GetSnap() const { return m_enableSnap; }
void SetUseGrid( bool aSnapToGrid ) { m_enableGrid = aSnapToGrid; }
bool GetUseGrid() const { return m_enableGrid; }
void SetSnapLine( bool aSnap ) { m_enableSnapLine = aSnap; }
void SetMask( int aMask ) { m_maskTypes = aMask; }
void SetMaskFlag( int aFlag ) { m_maskTypes |= aFlag; }
void ClearMaskFlag( int aFlag ) { m_maskTypes = m_maskTypes & ~aFlag; }
enum ANCHOR_FLAGS {
CORNER = 1,
OUTLINE = 2,
SNAPPABLE = 4,
ORIGIN = 8,
VERTICAL = 16,
HORIZONTAL = 32,
ALL = CORNER | OUTLINE | SNAPPABLE | ORIGIN | VERTICAL | HORIZONTAL
};
protected:
struct ANCHOR
{
ANCHOR( const VECTOR2I& aPos, int aFlags = CORNER | SNAPPABLE, EDA_ITEM* aItem = nullptr ) :
pos( aPos ),
flags( aFlags ),
item( aItem )
{ };
VECTOR2I pos;
int flags;
EDA_ITEM* item;
double Distance( const VECTOR2I& aP ) const
{
return ( aP - pos ).EuclideanNorm();
}
};
void addAnchor( const VECTOR2I& aPos, int aFlags, EDA_ITEM* aItem )
{
if( ( aFlags & m_maskTypes ) == aFlags )
m_anchors.emplace_back( ANCHOR( aPos, aFlags, aItem ) );
}
void clearAnchors()
{
m_anchors.clear();
m_snapItem = nullptr;
}
/**
* Check whether it is possible to use the grid -- this depends both on local grid helper
* settings and global (tool manager) KiCad settings.
*/
bool canUseGrid() const
{
return m_enableGrid && m_toolMgr->GetView()->GetGAL()->GetGridSnapping();
}
VECTOR2I computeNearest( const VECTOR2I& aPoint, const VECTOR2I& aGrid,
const VECTOR2I& aOffset ) const;
protected:
std::vector<ANCHOR> m_anchors;
TOOL_MANAGER* m_toolMgr;
std::optional<VECTOR2I> m_auxAxis;
int m_maskTypes; // Mask of allowed snap types
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