kicad/eeschema/tools/ee_grid_helper.cpp

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2014 CERN
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* Copyright (C) 2018-2021 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
*/
#include <functional>
#include <macros.h>
#include <sch_item.h>
#include <sch_line.h>
#include <sch_painter.h>
#include <tool/tool_manager.h>
#include <trigo.h>
#include <view/view.h>
#include "ee_grid_helper.h"
EE_GRID_HELPER::EE_GRID_HELPER( TOOL_MANAGER* aToolMgr ) :
GRID_HELPER( aToolMgr )
{
KIGFX::VIEW* view = m_toolMgr->GetView();
m_viewAxis.SetSize( 20000 );
m_viewAxis.SetStyle( KIGFX::ORIGIN_VIEWITEM::CROSS );
m_viewAxis.SetColor( COLOR4D( 0.0, 0.1, 0.4, 0.8 ) );
m_viewAxis.SetDrawAtZero( true );
view->Add( &m_viewAxis );
view->SetVisible( &m_viewAxis, false );
m_viewSnapPoint.SetStyle( KIGFX::ORIGIN_VIEWITEM::CIRCLE_CROSS );
m_viewSnapPoint.SetColor( COLOR4D( 0.0, 0.1, 0.4, 1.0 ) );
m_viewSnapPoint.SetDrawAtZero( true );
view->Add( &m_viewSnapPoint );
view->SetVisible( &m_viewSnapPoint, false );
m_viewSnapLine.SetStyle( KIGFX::ORIGIN_VIEWITEM::DASH_LINE );
m_viewSnapLine.SetColor( COLOR4D( 0.33, 0.55, 0.95, 1.0 ) );
m_viewSnapLine.SetDrawAtZero( true );
view->Add( &m_viewSnapLine );
view->SetVisible( &m_viewSnapLine, false );
}
VECTOR2I EE_GRID_HELPER::BestDragOrigin( const VECTOR2I &aMousePos, int aLayer,
const EE_SELECTION& aItems )
{
clearAnchors();
for( EDA_ITEM* item : aItems )
computeAnchors( static_cast<SCH_ITEM*>( item ), aMousePos, true );
double worldScale = m_toolMgr->GetView()->GetGAL()->GetWorldScale();
double lineSnapMinCornerDistance = 50.0 / worldScale;
ANCHOR* nearestOutline = nearestAnchor( aMousePos, OUTLINE, aLayer );
ANCHOR* nearestCorner = nearestAnchor( aMousePos, CORNER, aLayer );
ANCHOR* nearestOrigin = nearestAnchor( aMousePos, ORIGIN, aLayer );
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ANCHOR* best = nullptr;
double minDist = std::numeric_limits<double>::max();
if( nearestOrigin )
{
minDist = nearestOrigin->Distance( aMousePos );
best = nearestOrigin;
}
if( nearestCorner )
{
double dist = nearestCorner->Distance( aMousePos );
if( dist < minDist )
{
minDist = dist;
best = nearestCorner;
}
}
if( nearestOutline )
{
double dist = nearestOutline->Distance( aMousePos );
if( minDist > lineSnapMinCornerDistance && dist < minDist )
best = nearestOutline;
}
return best ? best->pos : aMousePos;
}
VECTOR2I EE_GRID_HELPER::BestSnapAnchor( const VECTOR2I& aOrigin, int aLayer, SCH_ITEM* aSkip )
{
EE_SELECTION skipItems;
skipItems.Add( aSkip );
return BestSnapAnchor( aOrigin, aLayer, skipItems );
}
VECTOR2I EE_GRID_HELPER::BestSnapAnchor( const VECTOR2I& aOrigin, int aLayer,
const EE_SELECTION& aSkip )
{
constexpr int snapRange = SNAP_RANGE * IU_PER_MILS;
VECTOR2I pt = aOrigin;
VECTOR2I snapDist( snapRange, snapRange );
bool snapLineX = false;
bool snapLineY = false;
bool snapPoint = false;
bool gridChecked = false;
BOX2I bb( VECTOR2I( aOrigin.x - snapRange / 2, aOrigin.y - snapRange / 2 ),
VECTOR2I( snapRange, snapRange ) );
clearAnchors();
for( SCH_ITEM* item : queryVisible( bb, aSkip ) )
computeAnchors( item, aOrigin );
ANCHOR* nearest = nearestAnchor( aOrigin, SNAPPABLE, aLayer );
VECTOR2I nearestGrid = Align( aOrigin );
if( m_enableSnapLine && m_snapItem && m_skipPoint != VECTOR2I( m_viewSnapLine.GetPosition() ) )
{
if( std::abs( m_viewSnapLine.GetPosition().x - aOrigin.x ) < snapDist.x )
{
pt.x = m_viewSnapLine.GetPosition().x;
snapDist.x = std::abs( m_viewSnapLine.GetPosition().x - aOrigin.x );
snapLineX = true;
}
if( std::abs( m_viewSnapLine.GetPosition().y - aOrigin.y ) < snapDist.y )
{
pt.y = m_viewSnapLine.GetPosition().y;
snapDist.y = std::abs( m_viewSnapLine.GetPosition().y - aOrigin.y );
snapLineY = true;
}
if( canUseGrid() && std::abs( nearestGrid.x - aOrigin.x ) < snapDist.x )
{
pt.x = nearestGrid.x;
snapDist.x = std::abs( nearestGrid.x - aOrigin.x );
snapLineX = false;
}
if( canUseGrid() && std::abs( nearestGrid.y - aOrigin.y ) < snapDist.y )
{
pt.y = nearestGrid.y;
snapDist.y = std::abs( nearestGrid.y - aOrigin.y );
snapLineY = false;
}
gridChecked = true;
}
if( m_enableSnap && nearest && nearest->Distance( aOrigin ) < snapDist.EuclideanNorm() )
{
if( canUseGrid() && ( nearestGrid - aOrigin ).EuclideanNorm() < snapDist.EuclideanNorm() )
{
pt = nearestGrid;
snapDist.x = std::abs( nearestGrid.x - aOrigin.x );
snapDist.y = std::abs( nearestGrid.y - aOrigin.y );
snapPoint = false;
}
else
{
pt = nearest->pos;
snapDist.x = std::abs( nearest->pos.x - aOrigin.x );
snapDist.y = std::abs( nearest->pos.y - aOrigin.y );
snapPoint = true;
}
snapLineX = snapLineY = false;
gridChecked = true;
}
if( canUseGrid() && !gridChecked )
pt = nearestGrid;
if( snapLineX || snapLineY )
{
m_viewSnapLine.SetEndPosition( pt );
if( m_toolMgr->GetView()->IsVisible( &m_viewSnapLine ) )
m_toolMgr->GetView()->Update( &m_viewSnapLine, KIGFX::GEOMETRY );
else
m_toolMgr->GetView()->SetVisible( &m_viewSnapLine, true );
}
else if( snapPoint )
{
m_snapItem = nearest;
m_viewSnapPoint.SetPosition( (wxPoint) pt );
m_viewSnapLine.SetPosition( (wxPoint) pt );
m_toolMgr->GetView()->SetVisible( &m_viewSnapLine, false );
if( m_toolMgr->GetView()->IsVisible( &m_viewSnapPoint ) )
m_toolMgr->GetView()->Update( &m_viewSnapPoint, KIGFX::GEOMETRY);
else
m_toolMgr->GetView()->SetVisible( &m_viewSnapPoint, true );
}
else
{
m_toolMgr->GetView()->SetVisible( &m_viewSnapPoint, false );
m_toolMgr->GetView()->SetVisible( &m_viewSnapLine, false );
}
return pt;
}
SCH_ITEM* EE_GRID_HELPER::GetSnapped() const
{
if( !m_snapItem )
return nullptr;
return static_cast<SCH_ITEM*>( m_snapItem->item );
}
std::set<SCH_ITEM*> EE_GRID_HELPER::queryVisible( const BOX2I& aArea,
const EE_SELECTION& aSkipList ) const
{
std::set<SCH_ITEM*> items;
std::vector<KIGFX::VIEW::LAYER_ITEM_PAIR> selectedItems;
KIGFX::VIEW* view = m_toolMgr->GetView();
view->Query( aArea, selectedItems );
for( const KIGFX::VIEW::LAYER_ITEM_PAIR& it : selectedItems )
{
SCH_ITEM* item = static_cast<SCH_ITEM*>( it.first );
// The item must be visible and on an active layer
if( view->IsVisible( item ) && item->ViewGetLOD( it.second, view ) < view->GetScale() )
items.insert ( item );
}
for( EDA_ITEM* skipItem : aSkipList )
items.erase( static_cast<SCH_ITEM*>( skipItem ) );
return items;
}
void EE_GRID_HELPER::computeAnchors( SCH_ITEM *aItem, const VECTOR2I &aRefPos, bool aFrom )
{
switch ( aItem->Type() )
{
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case SCH_SYMBOL_T:
case SCH_SHEET_T:
addAnchor( aItem->GetPosition(), ORIGIN, aItem );
KI_FALLTHROUGH;
case SCH_JUNCTION_T:
case SCH_NO_CONNECT_T:
case SCH_LINE_T:
case SCH_GLOBAL_LABEL_T:
case SCH_HIER_LABEL_T:
case SCH_LABEL_T:
case SCH_BUS_WIRE_ENTRY_T:
{
std::vector<wxPoint> pts = aItem->GetConnectionPoints();
for( const wxPoint &pt : pts )
addAnchor( VECTOR2I( pt ), SNAPPABLE | CORNER, aItem );
break;
}
default:
break;
}
if( SCH_LINE* line = dyn_cast<SCH_LINE*>( aItem ) )
{
VECTOR2I pt = Align( aRefPos );
if( line->GetStartPoint().x == line->GetEndPoint().x )
{
VECTOR2I possible( line->GetStartPoint().x, pt.y );
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if( TestSegmentHit( wxPoint( possible ), line->GetStartPoint(), line->GetEndPoint(),
0 ) )
addAnchor( possible, SNAPPABLE | VERTICAL, aItem );
}
else if( line->GetStartPoint().y == line->GetEndPoint().y )
{
VECTOR2I possible( pt.x, line->GetStartPoint().y );
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if( TestSegmentHit( wxPoint( possible ), line->GetStartPoint(), line->GetEndPoint(),
0 ) )
addAnchor( possible, SNAPPABLE | HORIZONTAL, aItem );
}
}
}
EE_GRID_HELPER::ANCHOR* EE_GRID_HELPER::nearestAnchor( const VECTOR2I& aPos, int aFlags,
int aMatchLayer )
{
double minDist = std::numeric_limits<double>::max();
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ANCHOR* best = nullptr;
for( ANCHOR& a : m_anchors )
{
SCH_ITEM* item = static_cast<SCH_ITEM*>( a.item );
if( ( aFlags & a.flags ) != aFlags )
continue;
if( aMatchLayer == LAYER_CONNECTABLE && !item->IsConnectable() )
continue;
else if( aMatchLayer == LAYER_GRAPHICS && item->IsConnectable() )
continue;
double dist = a.Distance( aPos );
if( dist < minDist )
{
minDist = dist;
best = &a;
}
}
return best;
}