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Added VIEW_GROUP for grouping items to be displayed on a single layer.

This commit is contained in:
Maciej Suminski 2013-08-20 15:07:38 +02:00
parent 61ba40aa7e
commit 5adba827a6
6 changed files with 513 additions and 112 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
common/CMakeLists.txt
View File

@ -152,6 +152,7 @@ set(COMMON_SRCS
${COMMON_SRCS}
view/view.cpp
view/view_item.cpp
view/view_group.cpp
system/fcontext.s

5
common/drawpanel_gal.cpp
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@ -88,7 +88,6 @@ EDA_DRAW_PANEL_GAL::EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWin
Connect( wxEVT_SIZE, wxSizeEventHandler( EDA_DRAW_PANEL_GAL::onSize ), NULL, this );
/* Generic events for the Tool Dispatcher */
Connect( wxEVT_MOTION, wxEventHandler( EDA_DRAW_PANEL_GAL::onEvent ), NULL, this );
Connect( wxEVT_LEFT_UP, wxEventHandler( EDA_DRAW_PANEL_GAL::onEvent ), NULL, this );
Connect( wxEVT_LEFT_DOWN, wxEventHandler( EDA_DRAW_PANEL_GAL::onEvent ), NULL, this );
@ -127,8 +126,8 @@ void EDA_DRAW_PANEL_GAL::onPaint( wxPaintEvent& WXUNUSED( aEvent ) )
void EDA_DRAW_PANEL_GAL::onSize( wxSizeEvent& aEvent )
{
m_gal->ResizeScreen( aEvent.GetSize().x, aEvent.GetSize().y );
m_view->SetTargetDirty( KiGfx::TARGET_CACHED );
m_view->SetTargetDirty( KiGfx::TARGET_NONCACHED );
m_view->MarkTargetDirty( KiGfx::TARGET_CACHED );
m_view->MarkTargetDirty( KiGfx::TARGET_NONCACHED );
}

223
common/view/view.cpp
View File

@ -28,6 +28,7 @@
#include <layers_id_colors_and_visibility.h>
#include <view/view.h>
#include <view/view_group.h>
#include <view/view_rtree.h>
#include <gal/definitions.h>
#include <gal/graphics_abstraction_layer.h>
@ -48,7 +49,7 @@ VIEW::VIEW( bool aIsDynamic ) :
{
// Redraw everything at the beginning
for( int i = 0; i < TARGETS_NUMBER; ++i )
SetTargetDirty( i );
MarkTargetDirty( i );
}
@ -111,53 +112,6 @@ void VIEW::Remove( VIEW_ITEM* aItem )
}
void VIEW::Draw( VIEW_ITEM* aItem, int aLayer ) const
{
if( isCached( aLayer ) )
{
// Draw using cached information or create one
int group = aItem->getGroup( aLayer );
if( group >= 0 )
{
m_gal->DrawGroup( group );
}
else
{
group = m_gal->BeginGroup();
aItem->setGroup( aLayer, group );
if( !m_painter->Draw( aItem, aLayer ) )
aItem->ViewDraw( aLayer, m_gal, BOX2I() ); // Alternative drawing method
m_gal->EndGroup();
}
}
else
{
// Immediate mode
if( !m_painter->Draw( aItem, aLayer ) )
aItem->ViewDraw( aLayer, m_gal, BOX2I() ); // Alternative drawing method
}
// Draws a bright contour around the item
if( static_cast<const EDA_ITEM*>( aItem )->IsBrightened() )
{
m_painter->DrawBrightened( aItem );
}
}
void VIEW::Draw( VIEW_ITEM* aItem ) const
{
int layers[VIEW_MAX_LAYERS], layers_count;
aItem->ViewGetLayers( layers, layers_count );
for( int i = 0; i < layers_count; ++i )
{
Draw( aItem, layers[i] );
}
}
void VIEW::SetRequired( int aLayerId, int aRequiredId, bool aRequired )
{
wxASSERT( (unsigned) aLayerId < m_layers.size() );
@ -271,9 +225,9 @@ void VIEW::SetGAL( GAL* aGal )
clearGroupCache();
// every target has to be refreshed
SetTargetDirty( TARGET_CACHED );
SetTargetDirty( TARGET_NONCACHED );
SetTargetDirty( TARGET_OVERLAY );
MarkTargetDirty( TARGET_CACHED );
MarkTargetDirty( TARGET_NONCACHED );
MarkTargetDirty( TARGET_OVERLAY );
// force the new GAL to display the current viewport.
SetCenter( m_center );
@ -336,8 +290,8 @@ void VIEW::SetScale( double aScale, const VECTOR2D& aAnchor )
m_scale = aScale;
// Redraw everything after the viewport has changed
SetTargetDirty( TARGET_CACHED );
SetTargetDirty( TARGET_NONCACHED );
MarkTargetDirty( TARGET_CACHED );
MarkTargetDirty( TARGET_NONCACHED );
}
@ -348,23 +302,8 @@ void VIEW::SetCenter( const VECTOR2D& aCenter )
m_gal->ComputeWorldScreenMatrix();
// Redraw everything after the viewport has changed
SetTargetDirty( TARGET_CACHED );
SetTargetDirty( TARGET_NONCACHED );
}
void VIEW::sortLayers()
{
int n = 0;
m_orderedLayers.resize( m_layers.size() );
for( LayerMapIter i = m_layers.begin(); i != m_layers.end(); ++i )
m_orderedLayers[n++] = &i->second;
sort( m_orderedLayers.begin(), m_orderedLayers.end(), compareRenderingOrder );
SetTargetDirty( TARGET_CACHED );
MarkTargetDirty( TARGET_CACHED );
MarkTargetDirty( TARGET_NONCACHED );
}
@ -376,6 +315,40 @@ void VIEW::SetLayerOrder( int aLayer, int aRenderingOrder )
}
int VIEW::GetLayerOrder( int aLayer ) const
{
return m_layers.at(aLayer).renderingOrder;
}
void VIEW::SortLayers( int aLayers[], int& aCount ) const
{
int maxLay, maxOrd, maxIdx;
for( int i = 0; i < aCount; ++i )
{
maxLay = aLayers[i];
maxOrd = GetLayerOrder( maxLay );
maxIdx = i;
// Look for the max element in the range (j..aCount)
for( int j = i; j < aCount; ++j )
{
if( maxOrd < GetLayerOrder( aLayers[j] ) )
{
maxLay = aLayers[j];
maxOrd = GetLayerOrder( maxLay );
maxIdx = j;
}
}
// Swap elements
aLayers[maxIdx] = aLayers[i];
aLayers[i] = maxLay;
}
}
struct VIEW::updateItemsColor
{
updateItemsColor( int aLayer, PAINTER* aPainter, GAL* aGal ) :
@ -559,7 +532,7 @@ struct VIEW::drawItem
if( !drawCondition )
return;
view->Draw( aItem, currentLayer->id );
view->draw( aItem, currentLayer->id );
}
const VIEW_LAYER* currentLayer;
@ -585,13 +558,73 @@ void VIEW::redrawRect( const BOX2I& aRect )
}
void VIEW::draw( VIEW_ITEM* aItem, int aLayer, bool aImmediate ) const
{
if( isCached( aLayer ) && !aImmediate )
{
// Draw using cached information or create one
int group = aItem->getGroup( aLayer );
if( group >= 0 )
{
m_gal->DrawGroup( group );
}
else
{
group = m_gal->BeginGroup();
aItem->setGroup( aLayer, group );
if( !m_painter->Draw( aItem, aLayer ) )
aItem->ViewDraw( aLayer, m_gal, BOX2I() ); // Alternative drawing method
m_gal->EndGroup();
}
}
else
{
// Immediate mode
if( !m_painter->Draw( aItem, aLayer ) )
aItem->ViewDraw( aLayer, m_gal, BOX2I() ); // Alternative drawing method
}
// Draws a bright contour around the item
if( static_cast<const EDA_ITEM*>( aItem )->IsBrightened() )
{
m_painter->DrawBrightened( aItem );
}
}
void VIEW::draw( VIEW_ITEM* aItem, bool aImmediate ) const
{
int layers[VIEW_MAX_LAYERS], layers_count;
aItem->ViewGetLayers( layers, layers_count );
SortLayers( layers, layers_count );
for( int i = 0; i < layers_count; ++i )
{
m_gal->SetLayerDepth( m_layers.at( i ).renderingOrder );
draw( aItem, layers[i], aImmediate );
}
}
void VIEW::draw( VIEW_GROUP* aGroup, bool aImmediate ) const
{
std::set<VIEW_ITEM*>::const_iterator it;
for( it = aGroup->Begin(); it != aGroup->End(); ++it )
{
draw( *it, aImmediate );
}
}
bool VIEW::IsDirty() const
{
BOOST_FOREACH( VIEW_LAYER* l, m_orderedLayers )
for( int i = 0; i < TARGETS_NUMBER; ++i )
{
if( l->isDirty )
if( isTargetDirty( i ) )
return true;
}
}
return false;
}
@ -675,18 +708,22 @@ void VIEW::Redraw()
m_gal->ClearTarget( TARGET_NONCACHED );
m_gal->ClearTarget( TARGET_CACHED );
SetTargetDirty( TARGET_NONCACHED );
SetTargetDirty( TARGET_CACHED );
MarkTargetDirty( TARGET_NONCACHED );
MarkTargetDirty( TARGET_CACHED );
m_gal->DrawGrid();
}
// Always refresh the overlay
MarkTargetDirty( TARGET_OVERLAY );
m_gal->ClearTarget( TARGET_OVERLAY );
redrawRect( rect );
// All targets were redrawn, so nothing is dirty
SetTargetDirty( TARGET_CACHED, false );
SetTargetDirty( TARGET_NONCACHED, false );
clearTargetDirty( TARGET_CACHED );
clearTargetDirty( TARGET_NONCACHED );
clearTargetDirty( TARGET_OVERLAY );
}
@ -752,10 +789,26 @@ void VIEW::invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags )
// Mark those layers as dirty, so the VIEW will be refreshed
m_layers[layers[i]].isDirty = true;
MarkTargetDirty( m_layers[layers[i]].target ); // TODO remove?
}
}
void VIEW::sortLayers()
{
int n = 0;
m_orderedLayers.resize( m_layers.size() );
for( LayerMapIter i = m_layers.begin(); i != m_layers.end(); ++i )
m_orderedLayers[n++] = &i->second;
sort( m_orderedLayers.begin(), m_orderedLayers.end(), compareRenderingOrder );
MarkTargetDirty( TARGET_CACHED );
}
void VIEW::updateItemAppearance( VIEW_ITEM* aItem, int aLayer )
{
wxASSERT( (unsigned) aLayer < m_layers.size() );
@ -811,15 +864,13 @@ void VIEW::RecacheAllItems( bool aImmediately )
r.SetMaximum();
#ifdef __WXDEBUG__
wxLogDebug( wxT( "RecacheAllItems::immediately: %u" ), aImmediately );
prof_counter totalRealTime;
prof_start( &totalRealTime, false );
#endif /* __WXDEBUG__ */
for( LayerMapIter i = m_layers.begin(); i != m_layers.end(); ++i )
{
VIEW_LAYER* l = & ( ( *i ).second );
VIEW_LAYER* l = &( ( *i ).second );
// Obviously, there is only one cached target that has to be recomputed
if( isCached( l->id ) )
@ -834,7 +885,8 @@ void VIEW::RecacheAllItems( bool aImmediately )
#ifdef __WXDEBUG__
prof_end( &totalRealTime );
wxLogDebug( wxT( "RecacheAllItems::%.1f ms" ), (double) totalRealTime.value / 1000.0 );
wxLogDebug( wxT( "RecacheAllItems::immediately: %u %.1f ms" ),
aImmediately, (double) totalRealTime.value / 1000.0 );
#endif /* __WXDEBUG__ */
}
@ -843,6 +895,10 @@ bool VIEW::isTargetDirty( int aTarget ) const
{
wxASSERT( aTarget < TARGETS_NUMBER );
// Check the target status
if( m_dirtyTargets[aTarget] )
return true;
// Check if any of layers belonging to the target is dirty
BOOST_FOREACH( VIEW_LAYER* l, m_orderedLayers )
{
@ -850,6 +906,5 @@ bool VIEW::isTargetDirty( int aTarget ) const
return true;
}
// If no layer is dirty, just check the target status itself
return m_dirtyTargets[aTarget];
return false;
}

145
common/view/view_group.cpp Normal file
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@ -0,0 +1,145 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Maciej Suminski <maciej.suminski@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
*
*/
/**
* @file view_group.cpp
* @brief VIEW_GROUP extends VIEW_ITEM by possibility of grouping items into a single object.
* VIEW_GROUP does not take over ownership of the held items. The main purpose of this class is
* to group items and draw them on a single layer (in particular the overlay).
*/
#include <set>
#include <algorithm>
#include <view/view_group.h>
#include <view/view.h>
#include <painter.h>
#include <gal/graphics_abstraction_layer.h>
#include <boost/foreach.hpp>
#include <layers_id_colors_and_visibility.h>
using namespace KiGfx;
VIEW_GROUP::VIEW_GROUP( VIEW* aView ) :
m_layer( ITEM_GAL_LAYER( GP_OVERLAY ) )
{
m_view = aView;
}
VIEW_GROUP::~VIEW_GROUP()
{
}
void VIEW_GROUP::Add( VIEW_ITEM* aItem )
{
m_items.insert( aItem );
updateBbox();
}
void VIEW_GROUP::Remove( VIEW_ITEM* aItem )
{
m_items.erase( aItem );
updateBbox();
}
void VIEW_GROUP::Clear()
{
m_items.clear();
updateBbox();
}
unsigned int VIEW_GROUP::GetSize() const
{
return m_items.size();
}
const BOX2I VIEW_GROUP::ViewBBox() const
{
BOX2I box;
// Merge all bounding boxes, so the returned one contains all stored items
BOOST_FOREACH( VIEW_ITEM* item, m_items )
{
box.Merge( item->ViewBBox() );
}
return box;
}
void VIEW_GROUP::ViewDraw( int aLayer, GAL* aGal, const BOX2I& aVisibleArea ) const
{
PAINTER* painter = m_view->GetPainter();
// Draw all items immediately (without caching)
BOOST_FOREACH( VIEW_ITEM* item, m_items )
{
int layers[VIEW::VIEW_MAX_LAYERS], layers_count;
item->ViewGetLayers( layers, layers_count );
m_view->SortLayers( layers, layers_count );
for( int i = 0; i < layers_count; i++ )
{
aGal->SetLayerDepth( m_view->GetLayerOrder( layers[i] ) );
if( !painter->Draw( item, layers[i] ) )
item->ViewDraw( layers[i], aGal, aVisibleArea ); // Alternative drawing method
}
/// m_view->Draw( item, true );
}
}
void VIEW_GROUP::ViewGetLayers( int aLayers[], int& aCount ) const
{
aLayers[0] = m_layer;
aCount = 1;
}
void VIEW_GROUP::ViewUpdate( int aUpdateFlags, bool aForceImmediateRedraw )
{
BOOST_FOREACH( VIEW_ITEM* item, m_items )
{
item->ViewUpdate( aUpdateFlags, aForceImmediateRedraw );
}
}
void VIEW_GROUP::updateBbox()
{
// Save the used VIEW, as it used nulled during Remove()
VIEW* view = m_view;
// Reinsert the group, so the bounding box can be updated
view->Remove( this );
view->Add( this );
}

93
include/view/view.h
View File

@ -37,6 +37,7 @@ namespace KiGfx
class PAINTER;
class GAL;
class VIEW_ITEM;
class VIEW_GROUP;
class VIEW_RTREE;
/**
@ -95,19 +96,6 @@ public:
*/
int Query( const BOX2I& aRect, std::vector<LayerItemPair>& aResult );
/**
* 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.
*/
void Draw( VIEW_ITEM* aItem, int aLayer ) const;
/**
* Function Draw()
* Draws an item on all layers that the item uses.
*/
void Draw( VIEW_ITEM* aItem ) const;
/**
* Function SetRequired()
* Marks the aRequiredId layer as required for the aLayerId layer. In order to display the
@ -296,13 +284,30 @@ public:
/**
* Function SetLayerOrder()
* Sets rendering order of a particular layer.
* Sets rendering order of a particular layer. Lower values are rendered first.
* @param aLayer: the layer
* @param aRenderingOrder: arbitrary number denoting the rendering order.
* Lower values are rendered first.
*/
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;
/**
* Function UpdateLayerColor()
* Applies the new coloring scheme held by RENDER_SETTINGS in case that it has changed.
@ -390,22 +395,20 @@ public:
* 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;
bool IsDirty() const;
/**
* Function SetTargetDirty()
* Function MarkTargetDirty()
* Sets or clears target 'dirty' flag.
* @param aTarget is the target to set.
* @param aState says if the flag should be set or cleared.
*/
inline void SetTargetDirty( int aTarget, bool aState = true )
inline void MarkTargetDirty( int aTarget )
{
wxASSERT( aTarget < TARGETS_NUMBER );
m_dirtyTargets[aTarget] = aState;
m_dirtyTargets[aTarget] = true;
}
static const int VIEW_MAX_LAYERS = 128; ///* maximum number of layers that may be shown
private:
@ -438,12 +441,49 @@ private:
struct updateItemsColor;
struct changeItemsDepth;
///* Whether to use rendering order modifier or not
bool m_enableOrderModifier;
///* Redraws contents within rect aRect
void redrawRect( const BOX2I& aRect );
inline void clearTargetDirty( int aTarget )
{
wxASSERT( aTarget < TARGETS_NUMBER );
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 to force immediate drawing mode
* for cached items.
*/
void draw( VIEW_ITEM* aItem, int aLayer, bool aImmediate = false ) const;
/**
* 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 to force immediate drawing mode
* for cached items.
*/
void draw( VIEW_ITEM* aItem, bool aImmediate = false ) const;
/**
* Function draw()
* Draws a group of items on all layers that those items use.
*
* @param aItem is the group to be drawn.
* @param aImmediate dictates the way of drawing - it allows to force immediate drawing mode
* for cached items.
*/
void draw( VIEW_GROUP* aGroup, bool aImmediate = false ) const;
///* Manages dirty flags & redraw queueing when updating an item. Called internally
/// via VIEW_ITEM::ViewUpdate()
void invalidateItem( VIEW_ITEM* aItem, int aUpdateFlags );
@ -484,10 +524,13 @@ private:
*/
bool isTargetDirty( int aTarget ) const;
///* Whether to use rendering order modifier or not
bool m_enableOrderModifier;
/// Contains set of possible displayed layers and its properties
LayerMap m_layers;
/// Sorted list of pointers to members of m_layers.
/// Sorted list of pointers to members of m_layers
LayerOrder m_orderedLayers;
/// Stores set of layers that are displayed on the top

158
include/view/view_group.h Normal file
View File

@ -0,0 +1,158 @@
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Maciej Suminski <maciej.suminski@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
*
*/
/**
* @file view_group.h
* @brief VIEW_GROUP extends VIEW_ITEM by possibility of grouping items into a single object.
* VIEW_GROUP does not take over ownership of the held items. The main purpose of this class is
* to group items and draw them on a single layer (in particular the overlay).
*/
#ifndef VIEW_GROUP_H_
#define VIEW_GROUP_H_
#include <view/view_item.h>
#include <deque>
namespace KiGfx
{
class VIEW_GROUP : public VIEW_ITEM
{
public:
VIEW_GROUP( VIEW* aView );
virtual ~VIEW_GROUP();
/**
* Function Add()
* Adds an item to the group.
*
* @param aItem is the item to be added.
*/
virtual void Add( VIEW_ITEM* aItem );
/**
* Function Remove()
* Removes an item from the group.
*
* @param aItem is the item to be removed.
*/
virtual void Remove( VIEW_ITEM* aItem );
/**
* Function Clear()
* Removes all the stored items from the group.
*/
virtual void Clear();
/**
* Function Begin()
* Returns iterator to beginning.
*/
inline std::set<VIEW_ITEM*>::const_iterator Begin() const
{
return m_items.begin();
}
/**
* Function End()
* Returns iterator to end.
*/
inline std::set<VIEW_ITEM*>::const_iterator End() const
{
return m_items.end();
}
/**
* Function GetSize()
* Returns the number of stored items.
*
* @return Number of stored items.
*/
virtual unsigned int GetSize() const;
/**
* Function ViewBBox()
* Returns the bounding box for all stored items covering all its layers.
*
* @return The current bounding box
*/
virtual const BOX2I ViewBBox() const;
/**
* Function ViewDraw()
* Draws all the stored items in the group on the given layer.
*
* @param aLayer is the layer which should be drawn.
* @param aGal is the GAL that should be used for drawing.
* @param aVisibleArea is limiting the drawing area.
*/
virtual void ViewDraw( int aLayer, GAL* aGal, const BOX2I& aVisibleArea ) const;
/**
* Function ViewGetLayers()
* Returns all the layers used by the stored items.
*
* @param aLayers[] is the output layer index array.
* @param aCount is the number of layer indices in aLayers[].
*/
virtual void ViewGetLayers( int aLayers[], int& aCount ) const;
/// @copydoc VIEW_ITEM::ViewUpdate()
virtual void ViewUpdate( int aUpdateFlags, bool aForceImmediateRedraw );
/**
* Function SetLayer()
* Sets layer used to draw the group.
*
* @param aLayer is the layer used for drawing.
*/
inline virtual void SetLayer( int aLayer )
{
m_layer = aLayer;
}
protected:
/// These functions cannot be used with VIEW_GROUP as they are intended only to work with
/// singular VIEW_ITEMs (there is only one-to-one relation between item/layer combination and
/// its group).
int getGroup( int aLayer ) const { return -1; };
std::vector<int> getAllGroups() const { return std::vector<int>(); };
void setGroup( int aLayer, int aGroup ) {};
void deleteGroups() {};
bool storesGroups() const { return false; };
/// Layer on which the group is drawn
int m_layer;
private:
void updateBbox();
/// Container for storing VIEW_ITEMs
std::set<VIEW_ITEM*> m_items;
};
} // namespace KiGfx
#endif // VIEW_GROUP_H_