forked from qt-creator/qt-creator
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2018 Benjamin Balga
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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****************************************************************************/
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#include "consolelineedit.h"
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#include "serialterminalconstants.h"
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#include <QKeyEvent>
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namespace SerialTerminal {
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namespace Internal {
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ConsoleLineEdit::ConsoleLineEdit(QWidget *parent) :
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QLineEdit(parent),
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m_maxEntries(Constants::DEFAULT_MAX_ENTRIES)
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{
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connect(this, &QLineEdit::returnPressed, this, &ConsoleLineEdit::addHistoryEntry);
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}
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// Add current text to history entries, if not empty and different from last entry.
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// Called when return key is pressed.
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void ConsoleLineEdit::addHistoryEntry()
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{
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m_currentEntryIndex = 0;
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const QString currentText = text();
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if (currentText.isEmpty())
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return;
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if (!m_history.isEmpty() && m_history.first() == currentText)
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return;
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m_history.prepend(currentText);
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if (m_history.size() > m_maxEntries)
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m_history.removeLast();
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}
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// Load a specific history entry: 0 = current, n = n-most last entry
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void ConsoleLineEdit::loadHistoryEntry(int entryIndex)
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{
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if (entryIndex < 0 || entryIndex > m_history.size())
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return;
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if (m_currentEntryIndex == 0)
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m_editingEntry = text();
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if (entryIndex <= 0 && m_currentEntryIndex > 0) {
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m_currentEntryIndex = 0;
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setText(m_editingEntry);
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} else if (entryIndex > 0) {
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m_currentEntryIndex = entryIndex;
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setText(m_history.at(entryIndex-1));
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}
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}
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void ConsoleLineEdit::keyPressEvent(QKeyEvent *event)
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{
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// Navigate history with up/down keys
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if (event->key() == Qt::Key_Up) {
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loadHistoryEntry(m_currentEntryIndex+1);
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event->accept();
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} else if (event->key() == Qt::Key_Down) {
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loadHistoryEntry(m_currentEntryIndex-1);
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event->accept();
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} else {
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QLineEdit::keyPressEvent(event);
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}
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}
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} // namespace Internal
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} // namespace SerialTerminal
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