kicad/common/tool/grid_helper.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2018-2021 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
*/
#include <functional>
using namespace std::placeholders;
#include <math/util.h> // for KiROUND
#include <math/vector2d.h>
#include <tool/tool_manager.h>
#include <view/view.h>
#include <tool/grid_helper.h>
GRID_HELPER::GRID_HELPER( TOOL_MANAGER* aToolMgr ) :
m_toolMgr( aToolMgr )
{
m_maskTypes = ALL;
m_enableSnap = true;
m_enableSnapLine = true;
m_enableGrid = true;
m_snapItem = nullptr;
}
GRID_HELPER::~GRID_HELPER()
{
}
VECTOR2I GRID_HELPER::GetGrid() const
{
VECTOR2D size = m_toolMgr->GetView()->GetGAL()->GetGridSize();
return VECTOR2I( KiROUND( size.x ), KiROUND( size.y ) );
}
VECTOR2I GRID_HELPER::GetVisibleGrid() const
{
VECTOR2D size = m_toolMgr->GetView()->GetGAL()->GetVisibleGridSize();
return VECTOR2I( KiROUND( size.x ), KiROUND( size.y ) );
}
VECTOR2I GRID_HELPER::GetOrigin() const
{
VECTOR2D origin = m_toolMgr->GetView()->GetGAL()->GetGridOrigin();
return VECTOR2I( origin );
}
void GRID_HELPER::SetAuxAxes( bool aEnable, const VECTOR2I& aOrigin )
{
if( aEnable )
{
m_auxAxis = aOrigin;
m_viewAxis.SetPosition( aOrigin );
m_toolMgr->GetView()->SetVisible( &m_viewAxis, true );
}
else
{
m_auxAxis = std::optional<VECTOR2I>();
m_toolMgr->GetView()->SetVisible( &m_viewAxis, false );
}
}
VECTOR2I GRID_HELPER::AlignGrid( const VECTOR2I& aPoint ) const
{
const VECTOR2D gridOffset( GetOrigin() );
const VECTOR2D grid( GetGrid() );
VECTOR2I nearest( KiROUND( ( aPoint.x - gridOffset.x ) / grid.x ) * grid.x + gridOffset.x,
KiROUND( ( aPoint.y - gridOffset.y ) / grid.y ) * grid.y + gridOffset.y );
return nearest;
}
VECTOR2I GRID_HELPER::Align( const VECTOR2I& aPoint ) const
{
if( !canUseGrid() )
return aPoint;
VECTOR2I nearest = AlignGrid( aPoint );
if( !m_auxAxis )
return nearest;
if( std::abs( m_auxAxis->x - aPoint.x ) < std::abs( nearest.x - aPoint.x ) )
nearest.x = m_auxAxis->x;
if( std::abs( m_auxAxis->y - aPoint.y ) < std::abs( nearest.y - aPoint.y ) )
nearest.y = m_auxAxis->y;
return nearest;
}