qTox/src/widget/tool/chattextedit.cpp

/*
    Copyright (C) 2014 by Project Tox <https://tox.im>

    This file is part of qTox, a Qt-based graphical interface for Tox.

    This program is libre 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, either version 3 of the License, or
    (at your option) any later version.
    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 COPYING file for more details.
*/

#include "chattextedit.h"
#include <QKeyEvent>

ChatTextEdit::ChatTextEdit(QWidget *parent) :
    QTextEdit(parent)
{
    setPlaceholderText(tr("Type your message here..."));
    setAcceptRichText(false);
}

void ChatTextEdit::keyPressEvent(QKeyEvent * event)
{
    int key = event->key();
    if ((key == Qt::Key_Enter || key == Qt::Key_Return) && !(event->modifiers() && Qt::ShiftModifier))
        emit enterPressed();
    else if (key == Qt::Key_Tab)
        emit tabPressed();
    /**
    If message box is empty, it will paste previous message on arrow up
    if message box is not empty,
    it will copy current(2) text and paste previous(1) message,
    to paste previous message(2) press arrow down,
    press arrow down twice to clear mesage box,
    only previous message(1) is available to paste now.
      */
    else if (key == Qt::Key_Up && this->toPlainText().isEmpty())
        this->setText(lastMessage);
    else if (key == Qt::Key_Up && !this->toPlainText().isEmpty()
             && lastMessage != this->toPlainText())
    {
        currentMessage = this->toPlainText();
        this->setText(lastMessage);
    }
    else if (key == Qt::Key_Down && !currentMessage.isEmpty())
    {
        this->setPlainText(currentMessage);
        currentMessage.clear();
    }
    else
    {
        emit keyPressed();
        QTextEdit::keyPressEvent(event);
    }
}

void ChatTextEdit::setLastMessage(QString lm)
{
    lastMessage = lm;
}