src/gui/progressbarpainter.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "progressbarpainter.h"
  30
  31 #include <QPainter>
  32 #include <QPalette>
  33 #include <QStyleOptionProgressBar>
  34 #include <QStyleOptionViewItem>
  35
  36 #if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
  37 #include <QProxyStyle>
  38 #endif
  39
  40 #include "base/global.h"
  41
  42 ProgressBarPainter::ProgressBarPainter()
  43 {
  44 #if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
  45     auto *fusionStyle = new QProxyStyle {u"fusion"_s};
  46     fusionStyle->setParent(&m_dummyProgressBar);
  47     m_dummyProgressBar.setStyle(fusionStyle);
  48 #endif
  49 }
  50
  51 void ProgressBarPainter::paint(QPainter *painter, const QStyleOptionViewItem &option, const QString &text, const int progress) const
  52 {
  53     QStyleOptionProgressBar styleOption;
  54     styleOption.initFrom(&m_dummyProgressBar);
  55     // QStyleOptionProgressBar fields
  56     styleOption.maximum = 100;
  57     styleOption.minimum = 0;
  58     styleOption.progress = progress;
  59     styleOption.text = text;
  60     styleOption.textVisible = true;
  61     // QStyleOption fields
  62     styleOption.rect = option.rect;
  63     // Qt 6 requires QStyle::State_Horizontal to be set for correctly drawing horizontal progress bar
  64     styleOption.state = option.state | QStyle::State_Horizontal;
  65
  66     const bool isEnabled = option.state.testFlag(QStyle::State_Enabled);
  67     styleOption.palette.setCurrentColorGroup(isEnabled ? QPalette::Active : QPalette::Disabled);
  68
  69     painter->save();
  70     const QStyle *style = m_dummyProgressBar.style();
  71     style->drawPrimitive(QStyle::PE_PanelItemViewItem, &option, painter, option.widget);
  72     style->drawControl(QStyle::CE_ProgressBar, &styleOption, painter, &m_dummyProgressBar);
  73     painter->restore();
  74 }