123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/generic/ctrlsub.h
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// Purpose: common functionality of wxItemContainer-derived controls
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// Author: Vadim Zeitlin
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// Created: 2007-07-25
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// Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GENERIC_CTRLSUB_H_
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#define _WX_GENERIC_CTRLSUB_H_
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#include "wx/dynarray.h"
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// ----------------------------------------------------------------------------
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// wxControlWithItemsGeneric: generic implementation of item client data
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// ----------------------------------------------------------------------------
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class wxControlWithItemsGeneric : public wxControlWithItemsBase
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{
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public:
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wxControlWithItemsGeneric() { }
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virtual void DoInitItemClientData()
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{
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m_itemsClientData.resize(GetCount(), NULL);
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}
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virtual void DoSetItemClientData(unsigned int n, void *clientData)
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{
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m_itemsClientData[n] = clientData;
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}
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virtual void *DoGetItemClientData(unsigned int n) const
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{
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return m_itemsClientData[n];
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}
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virtual void DoClear() { m_itemsClientData.clear(); }
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virtual void DoDeleteOneItem(unsigned int pos)
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{
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if ( HasClientData() )
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m_itemsClientData.RemoveAt(pos);
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}
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protected:
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// preallocate memory for numItems new items: this should be called from
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// the derived classes DoInsertItems() to speed up appending big numbers of
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// items with client data; it is safe to call even if we don't use client
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// data at all and does nothing in this case
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void AllocClientData(unsigned int numItems)
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{
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if ( HasClientData() )
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m_itemsClientData.reserve(m_itemsClientData.size() + numItems);
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}
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// this must be called by derived classes when a new item is added to the
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// control to add storage for the corresponding client data pointer (before
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// inserting many items, call AllocClientData())
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void InsertNewItemClientData(unsigned int pos,
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void **clientData,
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unsigned int n,
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wxClientDataType type)
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{
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if ( InitClientDataIfNeeded(type) )
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m_itemsClientData.Insert(clientData[n], pos);
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}
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// the same as InsertNewItemClientData() but for numItems consecutive items
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// (this can only be used if the control doesn't support sorting as
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// otherwise the items positions wouldn't be consecutive any more)
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void InsertNewItemsClientData(unsigned int pos,
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unsigned int numItems,
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void **clientData,
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wxClientDataType type)
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{
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if ( InitClientDataIfNeeded(type) )
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{
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// it's more efficient to insert everything at once and then update
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// for big number of items to avoid moving the array contents
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// around (which would result in O(N^2) algorithm)
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m_itemsClientData.Insert(NULL, pos, numItems);
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for ( unsigned int n = 0; n < numItems; ++n, ++pos )
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m_itemsClientData[pos] = clientData[n];
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}
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}
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// vector containing the client data pointers: it is either empty (if
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// client data is not used) or has the same number of elements as the
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// control
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wxArrayPtrVoid m_itemsClientData;
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private:
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// initialize client data if needed, return false if we don't have any
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// client data and true otherwise
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bool InitClientDataIfNeeded(wxClientDataType type)
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{
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if ( !HasClientData() )
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{
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if ( type == wxClientData_None )
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{
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// we didn't have the client data before and are not asked to
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// store it now neither
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return false;
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}
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// this is the first time client data is used with this control
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DoInitItemClientData();
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SetClientDataType(type);
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}
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//else: we already have client data
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return true;
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}
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wxDECLARE_NO_COPY_CLASS(wxControlWithItemsGeneric);
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};
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#endif // _WX_GENERIC_CTRLSUB_H_
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