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50
51#include "videowidget.h"
52
53#include "videowidgetsurface.h"
54
55#include <QtWidgets>
56#include <qvideosurfaceformat.h>
57
58//! [0]
59VideoWidget::VideoWidget(QWidget *parent)
60 : QWidget(parent)
61 , surface(0)
62{
63 setAutoFillBackground(false);
64 setAttribute(Qt::WA_NoSystemBackground, on: true);
65
66 QPalette palette = this->palette();
67 palette.setColor(acr: QPalette::Window, acolor: Qt::black);
68 setPalette(palette);
69
70 setSizePolicy(hor: QSizePolicy::MinimumExpanding, ver: QSizePolicy::MinimumExpanding);
71
72 surface = new VideoWidgetSurface(this);
73}
74//! [0]
75
76//! [1]
77VideoWidget::~VideoWidget()
78{
79 delete surface;
80}
81//! [1]
82
83//! [2]
84QSize VideoWidget::sizeHint() const
85{
86 return surface->surfaceFormat().sizeHint();
87}
88//! [2]
89
90
91//! [3]
92void VideoWidget::paintEvent(QPaintEvent *event)
93{
94 QPainter painter(this);
95
96 if (surface->isActive()) {
97 const QRect videoRect = surface->videoRect();
98
99 if (!videoRect.contains(r: event->rect())) {
100 QRegion region = event->region();
101 region = region.subtracted(r: videoRect);
102
103 QBrush brush = palette().window();
104
105 for (const QRect &rect : region)
106 painter.fillRect(rect, brush);
107 }
108
109 surface->paint(painter: &painter);
110 } else {
111 painter.fillRect(event->rect(), palette().window());
112 }
113}
114//! [3]
115
116//! [4]
117void VideoWidget::resizeEvent(QResizeEvent *event)
118{
119 QWidget::resizeEvent(event);
120
121 surface->updateVideoRect();
122}
123//! [4]
124

source code of qtmultimedia/examples/multimediawidgets/customvideosurface/customvideowidget/videowidget.cpp