src/gui/properties/piecesbar.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2024  Vladimir Golovnev <glassez@yandex.ru>
   4  * Copyright (C) 2016  Eugene Shalygin
   5  * Copyright (C) 2006  Christophe Dumez
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20  *
  21  * In addition, as a special exception, the copyright holders give permission to
  22  * link this program with the OpenSSL project's "OpenSSL" library (or with
  23  * modified versions of it that use the same license as the "OpenSSL" library),
  24  * and distribute the linked executables. You must obey the GNU General Public
  25  * License in all respects for all of the code used other than "OpenSSL".  If you
  26  * modify file(s), you may extend this exception to your version of the file(s),
  27  * but you are not obligated to do so. If you do not wish to do so, delete this
  28  * exception statement from your version.
  29  */
  30
  31 #pragma once
  32
  33 #include <QColor>
  34 #include <QImage>
  35 #include <QWidget>
  36
  37 class QHelpEvent;
  38
  39 namespace BitTorrent
  40 {
  41     class Torrent;
  42 }
  43
  44 class PiecesBar : public QWidget
  45 {
  46     Q_OBJECT
  47     Q_DISABLE_COPY_MOVE(PiecesBar)
  48
  49     using base = QWidget;
  50
  51 public:
  52     explicit PiecesBar(QWidget *parent = nullptr);
  53
  54     void setTorrent(const BitTorrent::Torrent *torrent);
  55
  56     virtual void clear();
  57
  58 protected:
  59     bool event(QEvent *e) override;
  60     void enterEvent(QEnterEvent *e) override;
  61     void leaveEvent(QEvent *e) override;
  62     void mouseMoveEvent(QMouseEvent *e) override;
  63     void paintEvent(QPaintEvent *e) override;
  64
  65     virtual void updateColors();
  66     void redraw();
  67
  68     QColor backgroundColor() const;
  69     QColor borderColor() const;
  70     QColor pieceColor() const;
  71     QColor highlightedPieceColor() const;
  72     QColor colorBoxBorderColor() const;
  73
  74     const QList<QRgb> &pieceColors() const;
  75
  76     // mix two colors by light model, ratio <0, 1>
  77     static QRgb mixTwoColors(QRgb rgb1, QRgb rgb2, float ratio);
  78
  79     static constexpr int borderWidth = 1;
  80
  81 private:
  82     void showToolTip(const QHelpEvent*);
  83     void highlightFile(int imagePos);
  84
  85     virtual QString simpleToolTipText() const = 0;
  86     virtual QImage renderImage() = 0;
  87
  88     void updateColorsImpl();
  89
  90     const BitTorrent::Torrent *m_torrent = nullptr;
  91     QImage m_image;
  92     // buffered 256 levels gradient from bg_color to piece_color
  93     QList<QRgb> m_pieceColors;
  94     bool m_hovered = false;
  95     QRect m_highlightedRegion; // part of the bar can be highlighted; this rectangle is in the same frame as m_image
  96 };