CuteLogger
Fast and simple logging solution for Qt based applications
videozoomwidget.h
1/*
2 * Copyright (c) 2019 Meltytech, LLC
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef VIDEOZOOMWIDGET_H
19#define VIDEOZOOMWIDGET_H
20
21#include "sharedframe.h"
22
23#include <QWidget>
24#include <QMutex>
25
26class VideoZoomWidget : public QWidget
27{
28 Q_OBJECT
29
30public:
31 struct PixelValues {
32 uint8_t y;
33 uint8_t u;
34 uint8_t v;
35 uint8_t r;
36 uint8_t g;
37 uint8_t b;
38 };
39
40 explicit VideoZoomWidget();
41
42 // May be called from a worker thread.
43 void putFrame(SharedFrame frame);
44
45 QPoint getSelectedPixel();
46 void setSelectedPixel(QPoint pixel);
47 QRect getPixelRect();
48 int getZoom();
49 PixelValues getPixelValues(const QPoint &pixel);
50 void setOffset(QPoint offset);
51
52signals:
53 void pixelSelected(const QPoint &);
54 void zoomChanged(int zoom);
55
56public slots:
57 void lock(bool locked);
58
59private:
60 virtual QSize sizeHint() const Q_DECL_OVERRIDE;
61
62 void paintEvent(QPaintEvent *) Q_DECL_OVERRIDE;
63 void mouseMoveEvent(QMouseEvent *event)Q_DECL_OVERRIDE;
64 void mousePressEvent(QMouseEvent *event)Q_DECL_OVERRIDE;
65 void wheelEvent(QWheelEvent *event)Q_DECL_OVERRIDE;
66
67 QPoint pixelToPos(const QPoint &pixel);
68 QPoint posToPixel(const QPoint &pos);
69 PixelValues pixelToValues(const QPoint &pixel);
70
71 bool m_locked;
72 bool m_selectionInProgress;
73 int m_zoom;
74 QPoint m_imageOffset;
75 QPoint m_mouseGrabPixel;
76 QPoint m_selectedPixel;
77
78 // Variables accessed from multiple threads (mutex protected)
79 QMutex m_mutex;
80 SharedFrame m_frame;
81};
82
83#endif // VIDEOZOOMWIDGET_H
The SharedFrame provides thread safe access to Mlt::Frame data.
Definition sharedframe.h:49