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