QTfrontend/ui/widget/HistoryLineEdit.cpp
author koda
Fri, 17 Feb 2012 18:23:36 +0100
changeset 6700 e04da46ee43c
parent 6616 f77bb02b669f
child 6952 7f70f37bbf08
permissions -rw-r--r--
the most important commit of the year
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
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 * Copyright (c) 2007-2012 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * 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
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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/**
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 * @file
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 * @brief HistoryLineEdit class implementation
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 */
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#include <QStringList>
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#include "HistoryLineEdit.h"
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HistoryLineEdit::HistoryLineEdit(QWidget * parent, int maxHistorySize)
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    : QLineEdit(parent)
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{
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    m_curHistEntryIdx = 0;
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    m_maxHistorySize = maxHistorySize;
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    m_history = new QStringList();
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}
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HistoryLineEdit::~HistoryLineEdit()
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{
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    delete m_history;
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}
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void HistoryLineEdit::rememberCurrentText()
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{
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    QString newEntry = text();
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    // don't store whitespace-only/empty text
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    if (newEntry.trimmed().isEmpty())
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        return;
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    m_history->removeOne(newEntry); // no duplicates please
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    m_history->append(newEntry);
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    // do not keep more entries than allowed
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    if (m_history->size() > m_maxHistorySize)
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        m_history->removeFirst();
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    // we're looking at the latest entry
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    m_curHistEntryIdx = m_history->size() - 1;
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}
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void HistoryLineEdit::clear()
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{
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    QLineEdit::clear();
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    m_curHistEntryIdx = m_history->size();
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}
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void HistoryLineEdit::reset()
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{
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    // forget history
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    m_history->clear();
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    m_curHistEntryIdx = 0;
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}
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void HistoryLineEdit::navigateHistory(bool isGoingUp)
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{
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    // save possible changes to new entry
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    if ((m_curHistEntryIdx >= m_history->size() ||
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            (text() != m_history->at(m_curHistEntryIdx))))
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    {
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        rememberCurrentText();
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    }
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    if (isGoingUp)
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        m_curHistEntryIdx--;
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    else
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        m_curHistEntryIdx++;
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    // if Idx higher than valid range
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    if (m_curHistEntryIdx >= m_history->size())
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    {
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        QLineEdit::clear();
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        m_curHistEntryIdx = m_history->size();
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    }
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    // if Idx in valid range
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    else if (m_curHistEntryIdx >= 0)
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    {
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        setText(m_history->at(m_curHistEntryIdx));
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    }
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    // if Idx below 0
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    else
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        m_curHistEntryIdx = 0;
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}
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void HistoryLineEdit::keyPressEvent(QKeyEvent * event)
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{
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    int key = event->key(); // retrieve pressed key
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    // navigate history with arrow keys
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    if (event->modifiers() == Qt::NoModifier)
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        switch (key)
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        {
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   119
            case Qt::Key_Escape:
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   120
                clear();
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   121
                event->accept();
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   122
                break;
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   123
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   124
            case Qt::Key_Up:
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   125
                navigateHistory(true);
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   126
                event->accept();
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   127
                break;
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   128
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   129
            case Qt::Key_Down:
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   130
                navigateHistory(false);
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   131
                event->accept();
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   132
                break;
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   133
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   134
            default:
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   135
                QLineEdit::keyPressEvent(event);
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   136
                break;
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   137
        }
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   138
    // otherwise forward keys to parent
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   139
    else
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   140
        QLineEdit::keyPressEvent(event);
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   141
}
9fd5b70acb1a give the room name edit box a history of previous room. however I hate that box from the bottom of my heart, it shall dieeeee... later...
sheepluva
parents:
diff changeset
   142