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/***************************************************************************
*
* Copyright (C) 2005 Elad Lahav (elad_lahav@users.sourceforge.net)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***************************************************************************/
#ifndef HISTORYVIEW_H
#define HISTORYVIEW_H
#include "queryview.h"
/**
* A list view item for holding position history records.
* A QListViewItem cannot reference its preceding item, which is required to
* create a stack-like history list. Therefore a HistoryItem object
* stores a pointer to the item just above it in the list. The pointer is
* persistent, since the list cannot be sorted.
* @author Elad Lahav
*/
class HistoryItem : public QListViewItem
{
public:
/**
* Class constructor.
* @param pList The parent list view
* @param sFile The file path in this record
* @param sLine The line number
* @param sText The contents of the line in the given file
*/
HistoryItem(QListView* pList, QString sFile, QString sLine,
QString sText) :
QListViewItem(pList, "", sFile, sLine, sText),
m_pPrevSibling(NULL) {
HistoryItem* pNext;
// Mark the new item as the predecessor of its next sibling
if ((pNext = (HistoryItem*)nextSibling()) != NULL)
pNext->m_pPrevSibling = this;
}
/** The item immediately above this one in the list. */
HistoryItem* m_pPrevSibling;
};
/**
* A list view widget for holding position history.
* Position history is kept in a stack-like list. Positions are always added
* to the top of the list, immediately before the current item. If the
* current item is not the top one, all items above it are purged first.
* To keep the stack-like structure, the list cannot be sorted.
* @author Elad Lahav
*/
class HistoryView : public QueryView
{
Q_OBJECT
public:
HistoryView(QWidget* pParent = 0, const char* szName = 0);
~HistoryView();
virtual void addRecord(const QString&, const QString&, const QString&,
const QString&, QListViewItem*);
virtual void selectNext();
virtual void selectPrev();
protected slots:
virtual void slotRemoveItem(QListViewItem*);
};
#endif
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