view.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2016 CERN
 * Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <[email protected]>
 *
 * 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 __VIEW_H
#define __VIEW_H
 
#include <gal/gal.h>
#include <vector>
#include <set>
#include <unordered_map>
#include <memory>
 
#include <math/box2.h>
#include <gal/definitions.h>
 
#include <view/view_overlay.h>
#include <view/view.h>
 
namespace KIGFX
{
class PAINTER;
class GAL;
class VIEW_ITEM;
class VIEW_GROUP;
class VIEW_RTREE;
 
class GAL_API VIEW
{
public:
 friend class VIEW_ITEM;
 
 typedef std::pair<VIEW_ITEM*, int> LAYER_ITEM_PAIR;
 
 VIEW( bool aIsDynamic = true );
 
 virtual ~VIEW();
 
 static void OnDestroy( VIEW_ITEM* aItem );
 
 virtual void Add( VIEW_ITEM* aItem, int aDrawPriority = -1 );
 
 virtual void Remove( VIEW_ITEM* aItem );
 
 
 int Query( const BOX2I& aRect, std::vector<LAYER_ITEM_PAIR>& aResult ) const;
 
 void Query( const BOX2I& aRect, const std::function<bool( VIEW_ITEM* )>& aFunc ) const;
 
 void SetVisible( VIEW_ITEM* aItem, bool aIsVisible = true );
 
 void Hide( VIEW_ITEM* aItem, bool aHide = true, bool aHideOverlay = false );
 
 bool IsVisible( const VIEW_ITEM* aItem ) const;
 
 bool IsHiddenOnOverlay( const VIEW_ITEM* aItem ) const;
 
 bool HasItem( const VIEW_ITEM* aItem ) const;
 
 virtual void Update( const VIEW_ITEM* aItem, int aUpdateFlags ) const;
 virtual void Update( const VIEW_ITEM* aItem ) const;
 
 void SetRequired( int aLayerId, int aRequiredId, bool aRequired = true );
 
 void CopySettings( const VIEW* aOtherView );
 
 /*
 * Convenience wrappers for adding multiple items
 * template <class T> void AddItems( const T& aItems );
 * template <class T> void RemoveItems( const T& aItems );
 */
 
 void SetGAL( GAL* aGal );
 
 inline GAL* GetGAL() const
 {
 return m_gal;
 }
 
 inline void SetPainter( PAINTER* aPainter )
 {
 m_painter = aPainter;
 }
 
 inline PAINTER* GetPainter() const
 {
 return m_painter;
 }
 
 void SetViewport( const BOX2D& aViewport );
 
 BOX2D GetViewport() const;
 
 void SetMirror( bool aMirrorX, bool aMirrorY );
 
 bool IsMirroredX() const
 {
 return m_mirrorX;
 }
 
 bool IsMirroredY() const
 {
 return m_mirrorY;
 }
 
 virtual void SetScale( double aScale, VECTOR2D aAnchor = { 0, 0 } );
 
 inline double GetScale() const
 {
 return m_scale;
 }
 
 inline void SetBoundary( const BOX2D& aBoundary )
 {
 m_boundary = aBoundary;
 }
 
 inline void SetBoundary( const BOX2I& aBoundary )
 {
 m_boundary.SetOrigin( aBoundary.GetOrigin() );
 m_boundary.SetEnd( aBoundary.GetEnd() );
 }
 
 inline const BOX2D& GetBoundary() const
 {
 return m_boundary;
 }
 
 void SetScaleLimits( double aMaximum, double aMinimum )
 {
 wxASSERT_MSG( aMaximum > aMinimum, wxT( "I guess you passed parameters in wrong order" ) );
 
 m_minScale = aMinimum;
 m_maxScale = aMaximum;
 }
 
 void SetCenter( const VECTOR2D& aCenter );
 
 void SetCenter( const VECTOR2D& aCenter, const std::vector<BOX2D>& obscuringScreenRects );
 
 const VECTOR2D& GetCenter() const
 {
 return m_center;
 }
 
 VECTOR2D ToWorld( const VECTOR2D& aCoord, bool aAbsolute = true ) const;
 
 double ToWorld( double aSize ) const;
 
 VECTOR2D ToScreen( const VECTOR2D& aCoord, bool aAbsolute = true ) const;
 
 double ToScreen( double aSize ) const;
 
 const VECTOR2I& GetScreenPixelSize() const;
 
 void Clear();
 
 inline void SetLayerVisible( int aLayer, bool aVisible = true )
 {
 wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
 
 if( m_layers[aLayer].visible != aVisible )
 {
 // Target has to be redrawn after changing its visibility
 MarkTargetDirty( m_layers[aLayer].target );
 m_layers[aLayer].visible = aVisible;
 }
 }
 
 inline bool IsLayerVisible( int aLayer ) const
 {
 wxCHECK( aLayer >= 0, false);
 wxCHECK( aLayer < (int) m_layers.size(), false );
 
 return m_layers.at( aLayer ).visible;
 }
 
 inline void SetLayerDiff( int aLayer, bool aDiff = true )
 {
 wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
 
 if( m_layers[aLayer].diffLayer != aDiff )
 {
 // Target has to be redrawn after changing its layers' diff status
 MarkTargetDirty( m_layers[aLayer].target );
 m_layers[aLayer].diffLayer = aDiff;
 }
 }
 
 inline void SetLayerHasNegatives( int aLayer, bool aNegatives = true )
 {
 wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
 
 if( m_layers[aLayer].hasNegatives != aNegatives )
 {
 // Target has to be redrawn after changing a layers' negatives
 MarkTargetDirty( m_layers[aLayer].target );
 m_layers[aLayer].hasNegatives = aNegatives;
 }
 }
 
 inline void SetLayerDisplayOnly( int aLayer, bool aDisplayOnly = true )
 {
 wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
 m_layers[aLayer].displayOnly = aDisplayOnly;
 }
 
 inline void SetLayerTarget( int aLayer, RENDER_TARGET aTarget )
 {
 wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
 m_layers[aLayer].target = aTarget;
 }
 
 void SetLayerOrder( int aLayer, int aRenderingOrder );
 
 int GetLayerOrder( int aLayer ) const;
 
 void SortLayers( int aLayers[], int& aCount ) const;
 
 void ReorderLayerData( std::unordered_map<int, int> aReorderMap );
 
 void UpdateLayerColor( int aLayer );
 
 void UpdateAllLayersColor();
 
 virtual void SetTopLayer( int aLayer, bool aEnabled = true );
 
 virtual void EnableTopLayer( bool aEnable );
 
 virtual int GetTopLayer() const;
 
 void ClearTopLayers();
 
 void UpdateAllLayersOrder();
 
 void ClearTargets();
 
 virtual void Redraw();
 
 void RecacheAllItems();
 
 bool IsDynamic() const
 {
 return m_dynamic;
 }
 
 bool IsDirty() const
 {
 for( int i = 0; i < TARGETS_NUMBER; ++i )
 {
 if( IsTargetDirty( i ) )
 return true;
 }
 
 return false;
 }
 
 bool IsTargetDirty( int aTarget ) const
 {
 wxCHECK( aTarget < TARGETS_NUMBER, false );
 return m_dirtyTargets[aTarget];
 }
 
 inline void MarkTargetDirty( int aTarget )
 {
 wxCHECK( aTarget < TARGETS_NUMBER, /* void */ );
 m_dirtyTargets[aTarget] = true;
 }
 
 inline bool IsCached( int aLayer ) const
 {
 wxCHECK( aLayer < (int) m_layers.size(), false );
 
 try
 {
 return m_layers.at( aLayer ).target == TARGET_CACHED;
 }
 catch( const std::out_of_range& )
 {
 return false;
 }
 }
 
 void MarkDirty()
 {
 for( int i = 0; i < TARGETS_NUMBER; ++i )
 m_dirtyTargets[i] = true;
 }
 
 void MarkClean()
 {
 for( int i = 0; i < TARGETS_NUMBER; ++i )
 m_dirtyTargets[i] = false;
 }
 
 void UpdateItems();
 
 void UpdateAllItems( int aUpdateFlags );
 
 void UpdateAllItemsConditionally( int aUpdateFlags,
 std::function<bool( VIEW_ITEM* )> aCondition );
 
 void UpdateAllItemsConditionally( std::function<int( VIEW_ITEM* )> aItemFlagsProvider );
 
 bool IsUsingDrawPriority() const
 {
 return m_useDrawPriority;
 }
 
 void UseDrawPriority( bool aFlag )
 {
 m_useDrawPriority = aFlag;
 }
 
 void ReverseDrawOrder( bool aFlag )
 {
 m_reverseDrawOrder = aFlag;
 }
 
 std::shared_ptr<VIEW_OVERLAY> MakeOverlay();
 
 void InitPreview();
 
 void ClearPreview();
 void AddToPreview( VIEW_ITEM* aItem, bool aTakeOwnership = true );
 
 void ShowPreview( bool aShow = true );
 
 std::unique_ptr<VIEW> DataReference() const;
 
 static constexpr int VIEW_MAX_LAYERS = 512;
 
 static constexpr int TOP_LAYER_MODIFIER = -VIEW_MAX_LAYERS;
 
protected:
 struct VIEW_LAYER
 {
 bool visible; 
 bool displayOnly; 
 bool diffLayer; 
 bool hasNegatives; 
 std::shared_ptr<VIEW_RTREE> items; 
 int renderingOrder; 
 int id; 
 RENDER_TARGET target; 
 std::set<int> requiredLayers; 
 };
 
 
 
 VIEW( const VIEW& ) = delete;
 
 void redrawRect( const BOX2I& aRect );
 
 inline void markTargetClean( int aTarget )
 {
 wxCHECK( aTarget < TARGETS_NUMBER, /* void */ );
 m_dirtyTargets[aTarget] = false;
 }
 
 void draw( VIEW_ITEM* aItem, int aLayer, bool aImmediate = false );
 
 void draw( VIEW_ITEM* aItem, bool aImmediate = false );
 
 void draw( VIEW_GROUP* aGroup, bool aImmediate = false );
 
 void sortLayers();
 
 void clearGroupCache();
 
 void invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags );
 
 void updateItemColor( VIEW_ITEM* aItem, int aLayer );
 
 void updateItemGeometry( VIEW_ITEM* aItem, int aLayer );
 
 void updateBbox( VIEW_ITEM* aItem );
 
 void updateLayers( VIEW_ITEM* aItem );
 
 static bool compareRenderingOrder( VIEW_LAYER* aI, VIEW_LAYER* aJ )
 {
 return aI->renderingOrder > aJ->renderingOrder;
 }
 
 bool areRequiredLayersEnabled( int aLayerId ) const;
 
 // Function objects that need to access VIEW/VIEW_ITEM private/protected members
 struct CLEAR_LAYER_CACHE_VISITOR;
 struct RECACHE_ITEM_VISITOR;
 struct DRAW_ITEM_VISITOR;
 struct UPDATE_COLOR_VISITOR;
 struct UPDATE_DEPTH_VISITOR;
 
 std::unique_ptr<KIGFX::VIEW_GROUP> m_preview;
 std::vector<VIEW_ITEM *> m_ownedItems;
 
 bool m_enableOrderModifier;
 
 std::vector<VIEW_LAYER> m_layers;
 
 std::vector<VIEW_LAYER*> m_orderedLayers;
 
 std::shared_ptr<std::vector<VIEW_ITEM*>> m_allItems;
 
 std::set<unsigned int> m_topLayers;
 
 VECTOR2D m_center;
 
 double m_scale;
 BOX2D m_boundary;
 double m_minScale;
 double m_maxScale;
 
 bool m_mirrorX;
 bool m_mirrorY;
 
 PAINTER* m_painter;
 
 GAL* m_gal;
 
 bool m_dynamic;
 
 bool m_dirtyTargets[TARGETS_NUMBER];
 
 bool m_useDrawPriority;
 
 int m_nextDrawPriority;
 
 bool m_reverseDrawOrder;
};
} // namespace KIGFX
 
#endif