src/gui/lineedit.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2023  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (c) 2007  Trolltech ASA <info@trolltech.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * In addition, as a special exception, the copyright holders give permission to
  21  * link this program with the OpenSSL project's "OpenSSL" library (or with
  22  * modified versions of it that use the same license as the "OpenSSL" library),
  23  * and distribute the linked executables. You must obey the GNU General Public
  24  * License in all respects for all of the code used other than "OpenSSL".  If you
  25  * modify file(s), you may extend this exception to your version of the file(s),
  26  * but you are not obligated to do so. If you do not wish to do so, delete this
  27  * exception statement from your version.
  28  */
  29
  30 #include "lineedit.h"
  31
  32 #include <chrono>
  33
  34 #include <QAction>
  35 #include <QKeyEvent>
  36 #include <QTimer>
  37
  38 #include "base/global.h"
  39 #include "uithememanager.h"
  40
  41 using namespace std::chrono_literals;
  42
  43 namespace
  44 {
  45     const std::chrono::milliseconds FILTER_INPUT_DELAY {400};
  46 }
  47
  48 LineEdit::LineEdit(QWidget *parent)
  49     : QLineEdit(parent)
  50     , m_delayedTextChangedTimer {new QTimer(this)}
  51 {
  52     auto *action = new QAction(UIThemeManager::instance()->getIcon(u"edit-find"_s), QString(), this);
  53     addAction(action, QLineEdit::LeadingPosition);
  54
  55     setClearButtonEnabled(true);
  56     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
  57
  58     m_delayedTextChangedTimer->setSingleShot(true);
  59     connect(m_delayedTextChangedTimer, &QTimer::timeout, this, [this]
  60     {
  61         emit textChanged(text());
  62     });
  63     connect(this, &QLineEdit::textChanged, this, [this]
  64     {
  65         m_delayedTextChangedTimer->start(FILTER_INPUT_DELAY);
  66     });
  67 }
  68
  69 void LineEdit::keyPressEvent(QKeyEvent *event)
  70 {
  71     if ((event->modifiers() == Qt::NoModifier) && (event->key() == Qt::Key_Escape))
  72     {
  73         clear();
  74     }
  75
  76     QLineEdit::keyPressEvent(event);
  77 }