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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013-2016 CERN
* @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
*/
#ifndef __VIEW_H
#define __VIEW_H
#include <vector>
#include <set>
#include <unordered_map>
#include <memory>
#include <math/box2.h>
#include <gal/definitions.h>
#include <view/view_overlay.h>
class EDA_ITEM;
namespace KIGFX
{
class PAINTER;
class GAL;
class VIEW_ITEM;
class VIEW_GROUP;
class VIEW_RTREE;
/**
* VIEW.
* Holds a (potentially large) number of VIEW_ITEMs and renders them on a graphics device
* provided by the GAL. VIEWs can exist in two flavors:
* - dynamic - where items can be added, removed or changed anytime, intended for the main
* editing panel. Each VIEW_ITEM can be added to a single dynamic view.
* - static - where items are added once at the startup and are not linked with the VIEW.
* Foreseen for preview windows and printing.
* Items in a view are grouped in layers (not to be confused with Kicad's PCB layers). Each layer is
* identified by an integer number. Visibility and rendering order can be set individually for each
* of the layers. Future versions of the VIEW will also allows one to assign different layers to different
* rendering targets, which will be composited at the final stage by the GAL.
* The VIEW class also provides fast methods for finding all visible objects that are within a given
* rectangular area, useful for object selection/hit testing.
*/
class VIEW
{
public:
friend class VIEW_ITEM;
typedef std::pair<VIEW_ITEM*, int> LAYER_ITEM_PAIR;
/**
* Constructor.
* @param aIsDynamic decides whether we are creating a static or a dynamic VIEW.
*/
VIEW( bool aIsDynamic = true );
virtual ~VIEW();
// nasty hack, invoked by the destructor of VIEW_ITEM to auto-remove the item
// from the owning VIEW if there is any. Kicad relies too much on this mechanism.
// this is the only linking dependency now between EDA_ITEM and VIEW class. In near future
// I'll replace it with observers.
static void OnDestroy( VIEW_ITEM* aItem );
/**
* Function Add()
* Adds a VIEW_ITEM to the view.
* Set aDrawPriority to -1 to assign sequential priorities.
* @param aItem: item to be added. No ownership is given
* @param aDrawPriority: priority to draw this item on its layer, lowest first.
*/
virtual void Add( VIEW_ITEM* aItem, int aDrawPriority = -1 );
/**
* Function Remove()
* Removes a VIEW_ITEM from the view.
* @param aItem: item to be removed. Caller must dispose the removed item if necessary
*/
virtual void Remove( VIEW_ITEM* aItem );
/**
* Function Query()
* Finds all visible items that touch or are within the rectangle aRect.
* @param aRect area to search for items
* @param aResult result of the search, containing VIEW_ITEMs associated with their layers.
* Sorted according to the rendering order (items that are on top of the rendering stack as
* first).
* @return Number of found items.
*/
virtual int Query( const BOX2I& aRect, std::vector<LAYER_ITEM_PAIR>& aResult ) const;
/**
* Sets the item visibility.
*
* @param aItem: the item to modify.
* @param aIsVisible: whether the item is visible (on all layers), or not.
*/
void SetVisible( VIEW_ITEM* aItem, bool aIsVisible = true );
/**
* Temporarily hides the item in the view (e.g. for overlaying)
*
* @param aItem: the item to modify.
* @param aHide: whether the item is hidden (on all layers), or not.
*/
void Hide( VIEW_ITEM* aItem, bool aHide = true );
/**
* Returns information if the item is visible (or not).
*
* @param aItem: the item to test.
* @return when true, the item is visible (i.e. to be displayed, not visible in the
* *current* viewport)
*/
bool IsVisible( const VIEW_ITEM* aItem ) const;
/**
* For dynamic VIEWs, informs the associated VIEW that the graphical representation of
* this item has changed. For static views calling has no effect.
*
* @param aItem: the item to update.
* @param aUpdateFlags: how much the object has changed.
*/
virtual void Update( const VIEW_ITEM* aItem, int aUpdateFlags ) const;
virtual void Update( const VIEW_ITEM* aItem ) const;
/**
* Function SetRequired()
* Marks the aRequiredId layer as required for the aLayerId layer. In order to display the
* layer, all of its required layers have to be enabled.
* @param aLayerId is the id of the layer for which we enable/disable the required layer.
* @param aRequiredId is the id of the required layer.
* @param aRequired tells if the required layer should be added or removed from the list.
*/
void SetRequired( int aLayerId, int aRequiredId, bool aRequired = true );
/**
* Function CopySettings()
* Copies layers and visibility settings from another view.
* @param aOtherView: view from which settings will be copied.
*/
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 );
*/
/**
* Function SetGAL()
* Assigns a rendering device for the VIEW.
* @param aGal: pointer to the GAL output device
*/
void SetGAL( GAL* aGal );
/**
* Function GetGAL()
* Returns the GAL this view is using to draw graphical primitives.
* @return Pointer to the currently used GAL instance.
*/
inline GAL* GetGAL() const
{
return m_gal;
}
/**
* Function SetPainter()
* Sets the painter object used by the view for drawing VIEW_ITEMS.
*/
inline void SetPainter( PAINTER* aPainter )
{
m_painter = aPainter;
}
/**
* Function GetPainter()
* Returns the painter object used by the view for drawing VIEW_ITEMS.
* @return Pointer to the currently used Painter instance.
*/
inline PAINTER* GetPainter() const
{
return m_painter;
}
/**
* Function SetViewport()
* Sets the visible area of the VIEW.
* @param aViewport: desired visible area, in world space coordinates.
*/
void SetViewport( const BOX2D& aViewport );
/**
* Function GetViewport()
* Returns the current viewport visible area rectangle.
* @return Current viewport rectangle
*/
BOX2D GetViewport() const;
/**
* Function SetMirror()
* Controls the mirroring of the VIEW.
* @param aMirrorX: when true, the X axis is mirrored
* @param aMirrorY: when true, the Y axis is mirrored.
*/
void SetMirror( bool aMirrorX, bool aMirrorY );
/**
* Function IsMirroredX()
* Returns true if view is flipped across the X axis.
*/
bool IsMirroredX() const
{
return m_mirrorX;
}
/**
* Function IsMirroredX()
* Returns true if view is flipped across the Y axis.
*/
bool IsMirroredY() const
{
return m_mirrorY;
}
/**
* Function SetScale()
* Sets the scaling factor, zooming around a given anchor point.
* (depending on correct GAL unit length & DPI settings).
* @param aAnchor: the zooming anchor point
* @param aScale: the scale factor
*/
virtual void SetScale( double aScale, VECTOR2D aAnchor = { 0, 0 } );
/**
* Function GetScale()
* @return Current scale factor of this VIEW.
*/
inline double GetScale() const
{
return m_scale;
}
/**
* Function SetBoundary()
* Sets limits for view area.
* @param aBoundary is the box that limits view area.
*/
inline void SetBoundary( const BOX2D& aBoundary )
{
m_boundary = aBoundary;
}
/**
* Function SetBoundary()
* Sets limits for view area.
* @param aBoundary is the box that limits view area.
*/
inline void SetBoundary( const BOX2I& aBoundary )
{
m_boundary.SetOrigin( aBoundary.GetOrigin() );
m_boundary.SetEnd( aBoundary.GetEnd() );
}
/**
* Function GetBoundary()
* @return Current view area boundary.
*/
inline const BOX2D& GetBoundary() const
{
return m_boundary;
}
/**
* Function SetScaleLimits()
* Sets minimum and maximum values for scale.
* @param aMaximum is the maximum value for scale.
* @param aMinimum is the minimum value for scale.
*/
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;
}
/**
* Function SetCenter()
* Sets the center point of the VIEW (i.e. the point in world space that will be drawn in the middle
* of the screen).
* @param aCenter: the new center point, in world space coordinates.
*/
void SetCenter( const VECTOR2D& aCenter );
/**
* Function SetCenter()
* Sets the center point of the VIEW, attempting to avoid \a occultingScreenRect (for
* instance, the screen rect of a modeless dialog in front of the VIEW).
* @param aCenter: the new center point, in world space coordinates.
* @param occultingScreenRect: the occulting rect, in screen space coordinates.
*/
void SetCenter( VECTOR2D aCenter, const BOX2D& occultingScreenRect );
/**
* Function GetCenter()
* Returns the center point of this VIEW (in world space coordinates)
* @return center point of the view
*/
const VECTOR2D& GetCenter() const
{
return m_center;
}
/**
* Function ToWorld()
* Converts a screen space point/vector to a point/vector in world space coordinates.
* @param aCoord: the point/vector to be converted
* @param aAbsolute: when true, aCoord is treated as a point, otherwise - as a direction (vector)
*/
VECTOR2D ToWorld( const VECTOR2D& aCoord, bool aAbsolute = true ) const;
/**
* Function ToWorld()
* Converts a screen space one dimensional size to a one dimensional size in world
* space coordinates.
* @param aSize : the size to be converted
*/
double ToWorld( double aSize ) const;
/**
* Function ToScreen()
* Converts a world space point/vector to a point/vector in screen space coordinates.
* @param aCoord: the point/vector to be converted
* @param aAbsolute: when true, aCoord is treated as a point, otherwise - as a direction (vector)
*/
VECTOR2D ToScreen( const VECTOR2D& aCoord, bool aAbsolute = true ) const;
/**
* Function ToScreen()
* Converts a world space one dimensionsal size to a one dimensional size in screen space.
* @param aSize: the size to be transformed.
*/
double ToScreen( double aSize ) const;
/**
* Function GetScreenPixelSize()
* Returns the size of the our rendering area, in pixels.
* @return viewport screen size
*/
const VECTOR2I& GetScreenPixelSize() const;
/**
* Function Clear()
* Removes all items from the view.
*/
void Clear();
/**
* Function SetLayerVisible()
* Controls the visibility of a particular layer.
* @param aLayer: the layer to show/hide.
* @param aVisible: the obvious.
*/
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;
}
}
/**
* Function IsLayerVisible()
* Returns information about visibility of a particular layer.
* @param aLayer: true if the layer is visible, false otherwise
*/
inline bool IsLayerVisible( int aLayer ) const
{
wxCHECK( aLayer < (int) m_layers.size(), false );
return m_layers.at( aLayer ).visible;
}
inline void SetLayerDisplayOnly( int aLayer, bool aDisplayOnly = true )
{
wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
m_layers[aLayer].displayOnly = aDisplayOnly;
}
/**
* Function SetLayerTarget()
* Changes the rendering target for a particular layer.
* @param aLayer is the layer.
* @param aTarget is the rendering target.
*/
inline void SetLayerTarget( int aLayer, RENDER_TARGET aTarget )
{
wxCHECK( aLayer < (int) m_layers.size(), /*void*/ );
m_layers[aLayer].target = aTarget;
}
/**
* Function SetLayerOrder()
* Sets rendering order of a particular layer. Lower values are rendered first.
* @param aLayer: the layer
* @param aRenderingOrder: arbitrary number denoting the rendering order.
*/
void SetLayerOrder( int aLayer, int aRenderingOrder );
/**
* Function GetLayerOrder()
* Returns rendering order of a particular layer. Lower values are rendered first.
* @param aLayer: the layer
* @return Rendering order of a particular layer.
*/
int GetLayerOrder( int aLayer ) const;
/**
* Function SortLayers()
* Changes the order of given layer ids, so after sorting the order corresponds to layers
* rendering order (descending, ie. order in which layers should be drawn - from the bottom to
* the top).
* @param aLayers stores id of layers to be sorted.
* @param aCount stores the number of layers.
*/
void SortLayers( int aLayers[], int& aCount ) const;
/**
* Remaps the data between layer ids without invalidating that data
*
* Used by GerbView for the "Sort by X2" functionality
*
* @param aReorderMap is a mapping of old to new layer ids
*/
void ReorderLayerData( std::unordered_map<int, int> aReorderMap );
/**
* Function UpdateLayerColor()
* Applies the new coloring scheme held by RENDER_SETTINGS in case that it has changed.
* @param aLayer is a number of the layer to be updated.
* @see RENDER_SETTINGS
*/
void UpdateLayerColor( int aLayer );
/**
* Function UpdateAllLayersColor()
* Applies the new coloring scheme to all layers. The used scheme is held by RENDER_SETTINGS.
* @see RENDER_SETTINGS
*/
void UpdateAllLayersColor();
/**
* Function SetTopLayer()
* Sets given layer to be displayed on the top or sets back the default order of layers.
* @param aEnabled = true to display aLayer on the top.
* @param aLayer: the layer or -1 in case when no particular layer should
* be displayed on the top.
*/
virtual void SetTopLayer( int aLayer, bool aEnabled = true );
/**
* Function EnableTopLayer()
* Enables or disables display of the top layer. When disabled - layers are rendered as usual
* with no influence from SetTopLayer function. Otherwise on the top there is displayed the
* layer set previously with SetTopLayer function.
* @param aEnable whether to enable or disable display of the top layer.
*/
virtual void EnableTopLayer( bool aEnable );
virtual int GetTopLayer() const;
/**
* Function ClearTopLayers()
* Removes all layers from the on-the-top set (they are no longer displayed over the rest of
* layers).
*/
void ClearTopLayers();
/**
* Function UpdateLayerOrder()
* Does everything that is needed to apply the rendering order of layers. It has to be called
* after modification of renderingOrder field of LAYER.
*/
void UpdateAllLayersOrder();
/**
* Function ClearTargets()
* Clears targets that are marked as dirty.
*/
void ClearTargets();
/**
* Function Redraw()
* Immediately redraws the whole view.
*/
virtual void Redraw();
/**
* Function RecacheAllItems()
* Rebuilds GAL display lists.
*/
void RecacheAllItems();
/**
* Function IsDynamic()
* Tells if the VIEW is dynamic (ie. can be changed, for example displaying PCBs in a window)
* or static (that cannot be modified, eg. displaying image/PDF).
*/
bool IsDynamic() const
{
return m_dynamic;
}
/**
* Function IsDirty()
* Returns true if any of the VIEW layers needs to be refreshened.
* @return True in case if any of layers is marked as dirty.
*/
bool IsDirty() const
{
for( int i = 0; i < TARGETS_NUMBER; ++i )
{
if( IsTargetDirty( i ) )
return true;
}
return false;
}
/**
* Function IsTargetDirty()
* Returns true if any of layers belonging to the target or the target itself should be
* redrawn.
* @return True if the above condition is fulfilled.
*/
bool IsTargetDirty( int aTarget ) const
{
wxCHECK( aTarget < TARGETS_NUMBER, false );
return m_dirtyTargets[aTarget];
}
/**
* Function MarkTargetDirty()
* Sets or clears target 'dirty' flag.
* @param aTarget is the target to set.
*/
inline void MarkTargetDirty( int aTarget )
{
wxCHECK( aTarget < TARGETS_NUMBER, /* void */ );
m_dirtyTargets[aTarget] = true;
}
/// Returns true if the layer is cached
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;
}
}
/**
* Function MarkDirty()
* Forces redraw of view on the next rendering.
*/
void MarkDirty()
{
for( int i = 0; i < TARGETS_NUMBER; ++i )
m_dirtyTargets[i] = true;
}
/**
* Function MarkForUpdate()
* Adds an item to a list of items that are going to be refreshed upon the next frame rendering.
* @param aItem is the item to be refreshed.
*/
void MarkForUpdate( VIEW_ITEM* aItem );
/**
* Function UpdateItems()
* Iterates through the list of items that asked for updating and updates them.
*/
void UpdateItems();
/**
* Updates all items in the view according to the given flags
* @param aUpdateFlags is is according to KIGFX::VIEW_UPDATE_FLAGS
*/
void UpdateAllItems( int aUpdateFlags );
/**
* Updates items in the view according to the given flags and condition
* @param aUpdateFlags is is according to KIGFX::VIEW_UPDATE_FLAGS
* @param aCondition is a function returning true if the item should be updated
*/
void UpdateAllItemsConditionally( int aUpdateFlags,
std::function<bool( VIEW_ITEM* )> aCondition );
/**
* Function IsUsingDrawPriority()
* @return true if draw priority is being respected while redrawing.
*/
bool IsUsingDrawPriority() const
{
return m_useDrawPriority;
}
/**
* Function UseDrawPriority()
* @param aFlag is true if draw priority should be respected while redrawing.
*/
void UseDrawPriority( bool aFlag )
{
m_useDrawPriority = aFlag;
}
/**
* Function IsDrawOrderReversed()
* @return true if draw order is reversed
*/
bool IsDrawOrderReversed() const
{
return m_reverseDrawOrder;
}
/**
* Function ReverseDrawOrder()
* Only takes effect if UseDrawPriority is true.
* @param aFlag is true if draw order should be reversed
*/
void ReverseDrawOrder( bool aFlag )
{
m_reverseDrawOrder = aFlag;
}
std::shared_ptr<VIEW_OVERLAY> MakeOverlay();
void InitPreview();
void ClearPreview();
void AddToPreview( EDA_ITEM* aItem, bool aTakeOwnership = true );
void ShowPreview( bool aShow = true );
/**
* Returns a new VIEW object that shares the same set of VIEW_ITEMs and LAYERs.
* GAL, PAINTER and other properties are left uninitialized.
*/
std::unique_ptr<VIEW> DataReference() const;
/**
* @return the printing mode.
* if return <= 0, the current mode is not a printing mode, just the draw mode
*/
int GetPrintMode() { return m_printMode; }
/**
* Set the printing mode.
* @param aPrintMode is the printing mode.
* If 0, the current mode is not a printing mode, just the draw mode
*/
void SetPrintMode( int aPrintMode ) { m_printMode = aPrintMode; }
static constexpr int VIEW_MAX_LAYERS = 512; ///< maximum number of layers that may be shown
protected:
struct VIEW_LAYER
{
bool visible; ///< is the layer to be rendered?
bool displayOnly; ///< is the layer display only?
std::shared_ptr<VIEW_RTREE> items; ///< R-tree indexing all items on this layer.
int renderingOrder; ///< rendering order of this layer
int id; ///< layer ID
RENDER_TARGET target; ///< where the layer should be rendered
std::set<int> requiredLayers; ///< layers that have to be enabled to show the layer
};
// Function objects that need to access VIEW/VIEW_ITEM private/protected members
struct clearLayerCache;
struct recacheItem;
struct drawItem;
struct unlinkItem;
struct updateItemsColor;
struct changeItemsDepth;
struct extentsVisitor;
std::unique_ptr<KIGFX::VIEW_GROUP> m_preview;
std::vector<EDA_ITEM *> m_ownedItems;
///* Redraws contents within rect aRect
void redrawRect( const BOX2I& aRect );
inline void markTargetClean( int aTarget )
{
wxCHECK( aTarget < TARGETS_NUMBER, /* void */ );
m_dirtyTargets[aTarget] = false;
}
/**
* Function draw()
* Draws an item, but on a specified layers. It has to be marked that some of drawing settings
* are based on the layer on which an item is drawn.
*
* @param aItem is the item to be drawn.
* @param aLayer is the layer which should be drawn.
* @param aImmediate dictates the way of drawing - it allows one to force
* immediate drawing mode for cached items.
*/
void draw( VIEW_ITEM* aItem, int aLayer, bool aImmediate = false );
/**
* Function draw()
* Draws an item on all layers that the item uses.
*
* @param aItem is the item to be drawn.
* @param aImmediate dictates the way of drawing - it allows one to force
* immediate drawing mode for cached items.
*/
void draw( VIEW_ITEM* aItem, bool aImmediate = false );
/**
* Function draw()
* Draws a group of items on all layers that those items use.
*
* @param aGroup is the group to be drawn.
* @param aImmediate dictates the way of drawing - it allows one to force
* immediate drawing mode for cached items.
*/
void draw( VIEW_GROUP* aGroup, bool aImmediate = false );
///* Sorts m_orderedLayers when layer rendering order has changed
void sortLayers();
///* Clears cached GAL group numbers (*ONLY* numbers stored in VIEW_ITEMs, not group objects
///* used by GAL)
void clearGroupCache();
/**
* Function invalidateItem()
* Manages dirty flags & redraw queueing when updating an item.
* @param aItem is the item to be updated.
* @param aUpdateFlags determines the way an item is refreshed.
*/
void invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags );
/// Updates colors that are used for an item to be drawn
void updateItemColor( VIEW_ITEM* aItem, int aLayer );
/// Updates all informations needed to draw an item
void updateItemGeometry( VIEW_ITEM* aItem, int aLayer );
/// Updates bounding box of an item
void updateBbox( VIEW_ITEM* aItem );
/// Updates set of layers that an item occupies
void updateLayers( VIEW_ITEM* aItem );
/// Determines rendering order of layers. Used in display order sorting function.
static bool compareRenderingOrder( VIEW_LAYER* aI, VIEW_LAYER* aJ )
{
return aI->renderingOrder > aJ->renderingOrder;
}
/// Checks if every layer required by the aLayerId layer is enabled.
bool areRequiredLayersEnabled( int aLayerId ) const;
///* Whether to use rendering order modifier or not
bool m_enableOrderModifier;
/// Contains set of possible displayed layers and its properties
std::vector<VIEW_LAYER> m_layers;
/// Sorted list of pointers to members of m_layers
std::vector<VIEW_LAYER*> m_orderedLayers;
/// Flat list of all items
std::shared_ptr<std::vector<VIEW_ITEM*>> m_allItems;
/// Stores set of layers that are displayed on the top
std::set<unsigned int> m_topLayers;
/// Center point of the VIEW (the point at which we are looking at)
VECTOR2D m_center;
/// Scale of displayed VIEW_ITEMs
double m_scale;
/// View boundaries
BOX2D m_boundary;
/// Scale lower limit
double m_minScale;
/// Scale upper limit
double m_maxScale;
///> Horizontal flip flag
bool m_mirrorX;
///> Vertical flip flag
bool m_mirrorY;
/// PAINTER contains information how do draw items
PAINTER* m_painter;
/// Gives interface to PAINTER, that is used to draw items
GAL* m_gal;
/// Dynamic VIEW (eg. display PCB in window) allows changes once it is built,
/// static (eg. image/PDF) - does not.
bool m_dynamic;
/// Flags to mark targets as dirty, so they have to be redrawn on the next refresh event
bool m_dirtyTargets[TARGETS_NUMBER];
/// Rendering order modifier for layers that are marked as top layers
static const int TOP_LAYER_MODIFIER;
/// Flat list of all items
/// Flag to respect draw priority when drawing items
bool m_useDrawPriority;
/// The next sequential drawing priority
int m_nextDrawPriority;
/// Flag to reverse the draw order when using draw priority
bool m_reverseDrawOrder;
/// A control for printing: m_printMode <= 0 means no printing mode (normal draw mode
/// m_printMode > 0 is a printing mode (currently means "we are in printing mode")
int m_printMode;
VIEW( const VIEW& ) = delete;
};
} // namespace KIGFX
#endif
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