src/gui/properties/piecesbar.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2016  Eugene Shalygin
   4  * Copyright (C) 2006  Christophe Dumez
   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 #pragma once
  31
  32 #include <QColor>
  33 #include <QImage>
  34 #include <QWidget>
  35
  36 class QHelpEvent;
  37
  38 namespace BitTorrent
  39 {
  40     class Torrent;
  41 }
  42
  43 class PiecesBar : public QWidget
  44 {
  45     Q_OBJECT
  46     Q_DISABLE_COPY_MOVE(PiecesBar)
  47
  48     using base = QWidget;
  49
  50 public:
  51     explicit PiecesBar(QWidget *parent = nullptr);
  52
  53     void setTorrent(const BitTorrent::Torrent *torrent);
  54
  55     virtual void clear();
  56
  57     // QObject interface
  58     virtual bool event(QEvent *e) override;
  59
  60 protected:
  61     // QWidget interface
  62 #if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
  63     void enterEvent(QEnterEvent *e) override;
  64 #else
  65     void enterEvent(QEvent *e) override;
  66 #endif
  67     void leaveEvent(QEvent *e) override;
  68     void mouseMoveEvent(QMouseEvent *e) override;
  69
  70     void paintEvent(QPaintEvent *e) override;
  71     void requestImageUpdate();
  72
  73     QColor backgroundColor() const;
  74     QColor borderColor() const;
  75     QColor pieceColor() const;
  76     QColor colorBoxBorderColor() const;
  77     const QVector<QRgb> &pieceColors() const;
  78
  79     // mix two colors by light model, ratio <0, 1>
  80     static QRgb mixTwoColors(QRgb rgb1, QRgb rgb2, float ratio);
  81
  82     static constexpr int borderWidth = 1;
  83
  84 private:
  85     void showToolTip(const QHelpEvent*);
  86     void highlightFile(int imagePos);
  87
  88     virtual QString simpleToolTipText() const = 0;
  89
  90     // draw new image to replace the actual image
  91     // returns true if image was successfully updated
  92     virtual bool updateImage(QImage &image) = 0;
  93     void updatePieceColors();
  94
  95     const BitTorrent::Torrent *m_torrent = nullptr;
  96     QImage m_image;
  97     // buffered 256 levels gradient from bg_color to piece_color
  98     QVector<QRgb> m_pieceColors;
  99     bool m_hovered = false;
 100     QRect m_highlightedRegion; // part of the bar can be highlighted; this rectangle is in the same frame as m_image
 101 };