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/*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
* Copyright (c) 2004-2015 Andrey Korotaev <unC0Rr@gmail.com>
*
* 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; version 2 of the License
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* @brief HistoryLineEdit class implementation
*/
#include <QStringList>
#include "HistoryLineEdit.h"
HistoryLineEdit::HistoryLineEdit(QWidget * parent, int maxHistorySize)
: QLineEdit(parent)
{
m_curHistEntryIdx = 0;
m_maxHistorySize = maxHistorySize;
m_history = new QStringList();
}
HistoryLineEdit::~HistoryLineEdit()
{
delete m_history;
}
void HistoryLineEdit::rememberCurrentText()
{
QString newEntry = text();
// don't store whitespace-only/empty text
if (newEntry.trimmed().isEmpty())
return;
m_history->removeOne(newEntry); // no duplicates please
m_history->append(newEntry);
// do not keep more entries than allowed
if (m_history->size() > m_maxHistorySize)
m_history->removeFirst();
// we're looking at the latest entry
m_curHistEntryIdx = m_history->size() - 1;
}
void HistoryLineEdit::clear()
{
QLineEdit::clear();
m_curHistEntryIdx = m_history->size();
}
void HistoryLineEdit::reset()
{
// forget history
m_history->clear();
m_curHistEntryIdx = 0;
}
void HistoryLineEdit::navigateHistory(bool isGoingUp)
{
// save possible changes to new entry
if ((m_curHistEntryIdx >= m_history->size() ||
(text() != m_history->at(m_curHistEntryIdx))))
{
rememberCurrentText();
}
if (isGoingUp)
m_curHistEntryIdx--;
else
m_curHistEntryIdx++;
// if Idx higher than valid range
if (m_curHistEntryIdx >= m_history->size())
{
QLineEdit::clear();
m_curHistEntryIdx = m_history->size();
}
// if Idx in valid range
else if (m_curHistEntryIdx >= 0)
{
setText(m_history->at(m_curHistEntryIdx));
}
// if Idx below 0
else
m_curHistEntryIdx = 0;
}
void HistoryLineEdit::keyPressEvent(QKeyEvent * event)
{
int key = event->key(); // retrieve pressed key
// navigate history with arrow keys
if (event->modifiers() == Qt::NoModifier)
switch (key)
{
case Qt::Key_Escape:
clear();
event->accept();
break;
case Qt::Key_Up:
navigateHistory(true);
event->accept();
break;
case Qt::Key_Down:
navigateHistory(false);
event->accept();
break;
default:
QLineEdit::keyPressEvent(event);
break;
}
// otherwise forward keys to parent
else
QLineEdit::keyPressEvent(event);
}
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