kicad/include/collector.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2007-2008 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
* Copyright (C) 2004-2017 KiCad Developers, see change_log.txt for contributors.
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*
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* 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.
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*
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* 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.
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*
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* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
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* 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.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file collector.h
* @brief COLLECTOR class definition.
*/
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#ifndef COLLECTOR_H
#define COLLECTOR_H
#include <vector>
#include <base_struct.h> // SEARCH_RESULT
#include <common.h> // GetNewTimeStamp()
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#include <eda_rect.h>
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class EDA_ITEM;
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/**
* Class COLLECTOR
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* is an abstract class that will find and hold all the objects according to
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* an inspection done by the Inspect() function which must be implemented by
* any derived class. When Inspect() finds an object that it wants to collect,
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* i.e. one that it "likes", then it only has to do an Append( testItem )
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* on it to add it to its collection, but in all cases for the scan to continue,
* Inspect() must return SEARCH_CONTINUE.
*
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* Later, after collection, the user can iterate through all the objects
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* in the remembered collection using GetCount() and the [int] operator.
*/
class COLLECTOR
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{
protected:
/// a class common bridge into the polymorphic Inspect()
INSPECTOR_FUNC m_inspector;
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/// Which object types to scan
const KICAD_T* m_ScanTypes;
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/// A place to hold collected objects without taking ownership of their memory.
std::vector<EDA_ITEM*> m_List;
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/// A point to test against, and that was used to make the collection.
wxPoint m_RefPos;
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/// A bounding box to test against, and that was used to make the collection.
EDA_RECT m_RefBox;
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/// The time at which the collection was made.
timestamp_t m_TimeAtCollection;
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public:
COLLECTOR() :
// Inspect() is virtual so calling it from a class common inspector preserves polymorphism.
m_inspector( [=] ( EDA_ITEM* aItem, void* aTestData ) { return this->Inspect( aItem, aTestData ); } )
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{
m_ScanTypes = 0;
m_TimeAtCollection = 0;
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}
virtual ~COLLECTOR() {}
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virtual SEARCH_RESULT Inspect( EDA_ITEM* aItem, void* aTestData ) = 0;
/**
* Function IsValidIndex
* tests if \a aIndex is with the limits of the list of collected items.
*
* @param aIndex The index to test.
* @return True if \a aIndex is with the limits of the list of collected items,
* otherwise false.
*/
bool IsValidIndex( int aIndex )
{
return ( (unsigned) aIndex < m_List.size() );
}
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/**
* Function GetCount
* returns the number of objects in the list
*/
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int GetCount() const
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{
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return (int) m_List.size();
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}
/**
* Function Empty
* sets the list to empty
*/
void Empty()
{
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m_List.clear();
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}
/**
* Function Append
* adds an item to the end of the list.
* @param item An EDA_ITEM* to add.
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*/
void Append( EDA_ITEM* item )
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{
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m_List.push_back( item );
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}
/**
* Function Remove
* removes the item at \a aIndex (first position is 0);
* @param aIndex The index into the list.
*/
void Remove( int aIndex )
{
m_List.erase( m_List.begin() + aIndex );
}
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/**
* Function Remove
* removes the item aItem (if exists in the collector).
* @param aItem the item to be removed.
*/
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void Remove( const EDA_ITEM* aItem )
{
for( size_t i = 0; i < m_List.size(); i++ )
{
if( m_List[i] == aItem )
{
m_List.erase( m_List.begin() + i);
return;
}
}
}
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/**
* Function operator[int]
* is used for read only access and returns the object at \a aIndex.
* @param aIndex The index into the list.
* @return EDA_ITEM* - or something derived from it, or NULL.
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*/
EDA_ITEM* operator[]( int aIndex ) const
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{
if( (unsigned)aIndex < (unsigned)GetCount() ) // (unsigned) excludes aIndex<0 also
return m_List[ aIndex ];
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return NULL;
}
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/**
* Function BasePtr
* returns the address of the first element in the array. Only call this
* if there is at least one element in the vector m_List, otherwise a
* C++ exception should get thrown.
*/
EDA_ITEM* const* BasePtr() const
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{
return &m_List[0];
}
/**
* Function HasItem
* tests if \a aItem has already been collected.
*
* @param aItem The EDA_ITEM* to be tested.
* @return True if \a aItem is already collected.
*/
bool HasItem( const EDA_ITEM* aItem ) const
{
for( size_t i = 0; i < m_List.size(); i++ )
{
if( m_List[i] == aItem )
return true;
}
return false;
}
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/**
* Function SetScanTypes
* records the list of KICAD_T types to consider for collection by
* the Inspect() function.
* @param scanTypes An array of KICAD_T, terminated by EOT. No copy is
* is made of this array (so cannot come from caller's stack).
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*/
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void SetScanTypes( const KICAD_T* scanTypes )
{
m_ScanTypes = scanTypes;
}
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void SetTimeNow()
{
m_TimeAtCollection = GetNewTimeStamp();
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}
timestamp_t GetTime()
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{
return m_TimeAtCollection;
}
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void SetRefPos( const wxPoint& aRefPos ) { m_RefPos = aRefPos; }
const wxPoint& GetRefPos() const { return m_RefPos; }
void SetBoundingBox( const EDA_RECT& aRefBox ) { m_RefBox = aRefBox; }
const EDA_RECT& GetBoundingBox() const { return m_RefBox; }
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/**
* Function IsSimilarPointAndTime
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* returns true if the given reference point is "similar" (defined here)
* to the internal reference point and the current time is within a few
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* seconds of the internal m_TimeAtCollection.
*
* @param aRefPos A wxPoint to compare to.
* @return bool - true if the point and time are similar, else false.
*/
bool IsSimilarPointAndTime( const wxPoint& aRefPos )
{
const int distMax = 2; // adjust these here
const timestamp_t timeMax = 3; // seconds
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int dx = abs( aRefPos.x - m_RefPos.x );
int dy = abs( aRefPos.y - m_RefPos.y );
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if( dx <= distMax && dy <= distMax &&
GetNewTimeStamp() - m_TimeAtCollection <= timeMax )
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return true;
else
return false;
}
/**
* Function CountType
* counts the number of items matching aType
* @param aType type we are interested in
* @return number of occurences
*/
int CountType( KICAD_T aType )
{
int cnt = 0;
for( size_t i = 0; i < m_List.size(); i++ )
{
if( m_List[i]->Type() == aType )
cnt++;
}
return cnt;
}
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/**
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* Function Collect
* scans an EDA_ITEM using this class's Inspector method, which does
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* the collection.
* @param container An EDA_ITEM to scan, including those items it contains.
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* @param aRefPos A wxPoint to use in hit-testing.
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*
* example implementation, in derived class:
*
void Collect( EDA_ITEM* container, const wxPoint& aRefPos )
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{
example implementation:
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SetRefPos( aRefPos ); // remember where the snapshot was taken from
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Empty(); // empty the collection
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// visit the board with the INSPECTOR (me).
container->Visit( inspector, &aRefPos,
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m_ScanTypes);
SetTimeNow(); // when it was taken
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}
*/
};
#endif // COLLECTOR_H