Adds a DBus message handler that plays a video via Qt

webview/Dockerfile

@@ -8,11 +8,6 @@ RUN apt-get update && \
         apt-utils \
         firebird-dev \
         freetds-dev \
-        gstreamer1.0-tools \
-        gstreamer1.0-plugins-base \
-        gstreamer1.0-plugins-good \
-        gstreamer1.0-plugins-ugly \
-        gstreamer1.0-x \
         libasound2-dev \
         libavcodec-dev \
         libavformat-dev \
@@ -31,8 +26,6 @@ RUN apt-get update && \
         libgles2-mesa-dev \
         libglib2.0-dev \
         libgst-dev \
-        libgstreamer-plugins-base1.0-dev \
-        libgstreamer1.0-dev \
         libicu-dev \
         libinput-dev \
         libiodbc2-dev \
@@ -96,7 +89,22 @@ RUN apt-get update && \
         nodejs \
         ruby \
         va-driver-all \
-        wget
+        wget \
+        libgstreamer1.0-dev \
+        libgstreamer-plugins-base1.0-dev \
+        libgstreamer-plugins-bad1.0-dev \
+        gstreamer1.0-plugins-base \
+        gstreamer1.0-plugins-good \
+        gstreamer1.0-plugins-bad \
+        gstreamer1.0-plugins-ugly \
+        gstreamer1.0-libav \
+        gstreamer1.0-tools \
+        gstreamer1.0-x \
+        gstreamer1.0-alsa \
+        gstreamer1.0-gl \
+        gstreamer1.0-gtk3 \
+        gstreamer1.0-qt5 \
+        gstreamer1.0-pulseaudio
 
 # Really make sure we don't have this package installed
 # as it will break the build of QTWebEngine

webview/ScreenlyWebview.pro

@@ -1,6 +1,6 @@
 TEMPLATE = app
 
-QT += webenginecore webenginewidgets dbus
+QT += webengine webenginewidgets dbus multimedia multimediawidgets
 CONFIG += c++11
 
 SOURCES += src/main.cpp \

webview/src/mainwindow.cpp

@@ -1,16 +1,20 @@
 #include <QStandardPaths>
+#include <QTimer>
 #include <QWebEngineSettings>
 
 #include "mainwindow.h"
 #include "view.h"
 
-
 MainWindow::MainWindow() : QMainWindow()
 {
     view = new View(this);
     view -> settings() -> setAttribute(QWebEngineSettings::LocalStorageEnabled, false);
     view -> settings() -> setAttribute(QWebEngineSettings::ShowScrollBars, false);
     setCentralWidget(view);
+
+    player = new QMediaPlayer(this, QMediaPlayer::Flags(QMediaPlayer::VideoSurface));
+    videoWidget = new QVideoWidget;
+    player->setVideoOutput(videoWidget);
 }
 
 void MainWindow::loadPage(const QString &uri)
@@ -22,3 +26,47 @@ void MainWindow:: loadImage(const QString &uri)
 {
     view -> loadImage(uri);
 }
+
+void MainWindow::loadVideo(const QString &uri, unsigned int durationInSecs)
+{
+    qDebug() << "Type: Video, URI: " << uri << ", Duration: " << durationInSecs << "s";
+
+    if (ready)
+    {
+        ready = false;
+        player->setMedia(QUrl::fromLocalFile(uri));
+
+        // Show a blank screen for a second before playing the video.
+        // This is to prevent the non-video content from being displayed for a short time
+        // after the video has finished playing.
+        view->loadImage("null");
+        QEventLoop loop;
+        QTimer::singleShot(1000, &loop, SLOT(quit()));
+        loop.exec();
+
+        view->hide();
+        videoWidget->setFullScreen(true);
+        videoWidget->show();
+
+        player->play();
+
+        // Convert duration from seconds to milliseconds.
+        unsigned int additionalDurationInMs = 1000; // This prevents the video for being stopped too early.
+        unsigned int durationInMs = durationInSecs * 1000 + additionalDurationInMs;
+
+        // @TODO: Use the state() method instead to check if the video is still playing.
+        // At the moment, state() returns QMediaPlayer::StoppedState even if the video is still playing.
+        QTimer::singleShot(durationInMs, this, [=](){
+            player->stop();
+            ready = true;
+
+            videoWidget->hide();
+            view->show();
+        });
+    }
+}
+
+bool MainWindow::isReady()
+{
+    return ready;
+}

webview/src/mainwindow.h

@@ -2,6 +2,8 @@
 
 #include <QMainWindow>
 #include <QWebEngineView>
+#include <QMediaPlayer>
+#include <QVideoWidget>
 
 #include "view.h"
 
@@ -15,7 +17,12 @@ class MainWindow : public QMainWindow
     public slots:
         void loadPage(const QString &uri);
         void loadImage(const QString &uri);
+        void loadVideo(const QString &uri, unsigned int durationInSecs);
+        bool isReady();
 
     private:
         View *view;
+        QMediaPlayer *player;
+        QVideoWidget *videoWidget;
+        bool ready = true;
 };