Add Camera sharing through WebSockets

Polyhedron/demo/Polyhedron/CMakeLists.txt

@@ -64,7 +64,7 @@ include(${CGAL_USE_FILE})
 find_package(Qt5
              QUIET
              COMPONENTS            OpenGL Script
-             OPTIONAL_COMPONENTS   ScriptTools)
+             OPTIONAL_COMPONENTS   ScriptTools WebSockets)
 
 if(Qt5_FOUND)
 
@@ -199,6 +199,11 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND)
   target_link_libraries(demo_framework
     PUBLIC Qt5::OpenGL Qt5::Widgets Qt5::Gui Qt5::Script
     )
+  if(TARGET Qt5::WebSockets)
+    target_link_libraries(demo_framework PUBLIC Qt5::WebSockets)
+    message(STATUS "Qt5WebSockets was found. Using WebSockets is therefore possible.")
+  endif()
+
   cgal_add_compilation_test(demo_framework)
   # Let's define `three_EXPORT` during the compilation of `demo_framework`,
   # in addition of `demo_framework_EXPORT` (defined automatically by
@@ -337,6 +342,9 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND)
     add_definitions(-DCGAL_USE_SSH)
     target_link_libraries(polyhedron_demo PUBLIC ${LIBSSH_LIBRARIES})
   endif() #libssh
+  if(TARGET Qt5::WebSockets)
+    target_link_libraries(polyhedron_demo PUBLIC Qt5::WebSockets)
+  endif()
   add_executable  ( Polyhedron_3 Polyhedron_3.cpp )
   target_link_libraries( Polyhedron_3 PRIVATE polyhedron_demo )
   add_to_cached_list( CGAL_EXECUTABLE_TARGETS Polyhedron_3 )

Polyhedron/demo/Polyhedron/MainWindow.cpp

@@ -2198,10 +2198,6 @@ void MainWindow::on_actionPreferences_triggered()
   QDialog dialog(this);
   Ui::PreferencesDialog prefdiag;
   prefdiag.setupUi(&dialog);
-#ifdef CGAL_USE_SSH
-
-  prefdiag.sshButton->setEnabled(true);
-#endif
   float lineWidth[2];
   if(!viewer->isOpenGL_4_3())
     viewer->glGetFloatv(GL_LINE_WIDTH_RANGE, lineWidth);
@@ -2345,6 +2341,12 @@ void MainWindow::on_actionPreferences_triggered()
     QDialog dialog(this);
     Ui::SSHDialog sshdiag;
     sshdiag.setupUi(&dialog);
+
+#ifdef CGAL_USE_SSH
+    sshdiag.userBox->setEnabled(true);
+    sshdiag.serverBox->setEnabled(true);
+    sshdiag.pkBox->setEnabled(true);
+    sshdiag.privkBox->setEnabled(true);
     sshdiag.userEdit->setText(settings.value("ssh_user", QString()).toString());
     sshdiag.serverEdit->setText(settings.value("ssh_server", QString()).toString());
     sshdiag.publicEdit->setText(settings.value("ssh_public_key", QString()).toString());
@@ -2371,11 +2373,18 @@ void MainWindow::on_actionPreferences_triggered()
         return;
       sshdiag.privkEdit->setText(diag.selectedFiles().front());
     });
-    connect(prefdiag.sshButton, &QPushButton::clicked,
-            this, [this, prefdiag](){});
+#else
+    sshdiag.userBox->setEnabled(false);
+    sshdiag.serverBox->setEnabled(false);
+    sshdiag.pkBox->setEnabled(false);
+    sshdiag.privkBox->setEnabled(false);
+#endif
+    sshdiag.wsEdit->setText(settings.value("ws_server_url", QString()).toString());
+
     dialog.exec();
     if ( dialog.result() )
     {
+#ifdef CGAL_USE_SSH
       settings.setValue("ssh_user",
                         sshdiag.userEdit->text());
       settings.setValue("ssh_server",
@@ -2384,8 +2393,13 @@ void MainWindow::on_actionPreferences_triggered()
                         sshdiag.publicEdit->text());
       settings.setValue("ssh_priv_key",
                         sshdiag.privkEdit->text());
+#endif
+      settings.setValue("ws_server_url",
+                        sshdiag.wsEdit->text());
+      setProperty("ws_url", sshdiag.wsEdit->text());
     }
   });
+
   dialog.exec();
 
   if ( dialog.result() )
@@ -2871,7 +2885,7 @@ QByteArray file_to_string(const char* filename)
   //ss.write( << f.rdbuf(); // reading data
   f.close();
   std::string st = ss.str();
-  QByteArray ba(st.c_str(), st.size());
+  QByteArray ba(st.c_str(), static_cast<int>(st.size()));
   return ba;
 }
 
@@ -3212,6 +3226,11 @@ void MainWindow::setupViewer(Viewer* viewer, SubViewer* subviewer)
     information(s);
   });
 
+
+  action= subviewer->findChild<QAction*>("actionShareCamera");
+  connect(action, SIGNAL(toggled(bool)),
+          viewer, SLOT(setShareCam(bool)));
+  
 }
 
 void MainWindow::on_actionAdd_Viewer_triggered()
@@ -3363,6 +3382,11 @@ SubViewer::SubViewer(QWidget *parent, MainWindow* mw, Viewer* mainviewer)
   QAction* actionTotalPass = new QAction("Set Transparency Pass &Number...",this);
   actionTotalPass->setObjectName("actionTotalPass");
   viewMenu->addAction(actionTotalPass);
+  QAction* actionShareCamera= new QAction("Join WS Server",this);
+  actionShareCamera->setObjectName("actionShareCamera");
+  actionShareCamera->setCheckable(true);
+  actionShareCamera->setChecked(false);
+  viewMenu->addAction(actionShareCamera);
   if(mainviewer)
     setAttribute(Qt::WA_DeleteOnClose);
   setWindowIcon(QIcon(":/cgal/icons/resources/menu.png"));
@@ -3521,6 +3545,7 @@ void MainWindow::on_actionLoad_a_Scene_from_a_Script_File_triggered()
 
   if(do_download)
   {
+    #ifdef CGAL_USE_SSH
     using namespace CGAL::ssh_internal;
     QString server = settings.value("ssh_server", QString()).toString();
     QString pk = settings.value("ssh_public_key", QString()).toString();
@@ -3567,6 +3592,7 @@ void MainWindow::on_actionLoad_a_Scene_from_a_Script_File_triggered()
       std::cout << "Error during connection : ";
       std::cout << e.getError() << std::endl;
     }
+    #endif
   }
   else
   {

Polyhedron/demo/Polyhedron/Preferences.ui

@@ -288,10 +288,10 @@
             <item>
              <widget class="QPushButton" name="sshButton">
               <property name="enabled">
-               <bool>false</bool>
+               <bool>true</bool>
               </property>
               <property name="text">
-               <string>SSH Settings</string>
+               <string>Network Settings</string>
               </property>
              </widget>
             </item>

Polyhedron/demo/Polyhedron/SSH_dialog.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>466</width>
-    <height>399</height>
+    <width>415</width>
+    <height>441</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -17,63 +17,84 @@
    <item>
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
-      <widget class="QGroupBox" name="userBox">
+      <widget class="QGroupBox" name="groupBox_2">
        <property name="title">
-        <string>User</string>
+        <string>SSH Preferences</string>
        </property>
-       <layout class="QHBoxLayout" name="horizontalLayout">
+       <layout class="QVBoxLayout" name="verticalLayout_3">
         <item>
-         <widget class="QLineEdit" name="userEdit"/>
-        </item>
-       </layout>
-      </widget>
-     </item>
-     <item>
-      <widget class="QGroupBox" name="serverBox">
-       <property name="title">
-        <string>Server</string>
-       </property>
-       <layout class="QHBoxLayout" name="horizontalLayout_2">
-        <item>
-         <widget class="QLineEdit" name="serverEdit"/>
-        </item>
-       </layout>
-      </widget>
-     </item>
-     <item>
-      <widget class="QGroupBox" name="pkBox">
-       <property name="title">
-        <string>Public Key </string>
-       </property>
-       <layout class="QHBoxLayout" name="horizontalLayout_3">
-        <item>
-         <widget class="QLineEdit" name="publicEdit"/>
-        </item>
-        <item>
-         <widget class="QPushButton" name="pubButton">
-          <property name="text">
-           <string>Browse...</string>
+         <widget class="QGroupBox" name="userBox">
+          <property name="title">
+           <string>User</string>
           </property>
+          <layout class="QHBoxLayout" name="horizontalLayout">
+           <item>
+            <widget class="QLineEdit" name="userEdit"/>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="serverBox">
+          <property name="title">
+           <string>Server</string>
+          </property>
+          <layout class="QHBoxLayout" name="horizontalLayout_2">
+           <item>
+            <widget class="QLineEdit" name="serverEdit"/>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="pkBox">
+          <property name="title">
+           <string>Public Key </string>
+          </property>
+          <layout class="QHBoxLayout" name="horizontalLayout_3">
+           <item>
+            <widget class="QLineEdit" name="publicEdit"/>
+           </item>
+           <item>
+            <widget class="QPushButton" name="pubButton">
+             <property name="text">
+              <string>Browse...</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="privkBox">
+          <property name="title">
+           <string>Private Key</string>
+          </property>
+          <layout class="QHBoxLayout" name="horizontalLayout_4">
+           <item>
+            <widget class="QLineEdit" name="privkEdit"/>
+           </item>
+           <item>
+            <widget class="QPushButton" name="privButton">
+             <property name="text">
+              <string>Browse...</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
          </widget>
         </item>
        </layout>
       </widget>
      </item>
      <item>
-      <widget class="QGroupBox" name="privkBox">
+      <widget class="QGroupBox" name="groupBox">
        <property name="title">
-        <string>Private Key</string>
+        <string>Camera Synchronization Server</string>
        </property>
-       <layout class="QHBoxLayout" name="horizontalLayout_4">
+       <layout class="QVBoxLayout" name="verticalLayout_4">
         <item>
-         <widget class="QLineEdit" name="privkEdit"/>
-        </item>
-        <item>
-         <widget class="QPushButton" name="privButton">
-          <property name="text">
-           <string>Browse...</string>
-          </property>
-         </widget>
+         <widget class="QLineEdit" name="wsEdit"/>
         </item>
        </layout>
       </widget>

Polyhedron/demo/Polyhedron/Viewer.cpp

@@ -16,6 +16,7 @@
 #include <QApplication>
 #include <QOpenGLDebugLogger>
 #include <QStyleFactory>
+#include <QtWebSockets/QWebSocket>
 
 #include <CGAL/Three/Three.h>
 
@@ -40,6 +41,7 @@ public:
   bool inDrawWithNames;
   bool clipping;
   bool projection_is_ortho;
+  bool cam_sharing;
   GLfloat gl_point_size;
   QVector4D clipbox[6];
   QPainter *painter;
@@ -107,6 +109,9 @@ public:
   {
     return shader_programs;
   }
+
+  QWebSocket m_webSocket;
+  QUrl m_url;
 };
 
 class LightingDialog :
@@ -254,6 +259,7 @@ void Viewer::doBindings()
   d->spec_power = viewer_settings.value("spec_power", 51.8).toFloat();
   d->scene = 0;
   d->projection_is_ortho = false;
+  d->cam_sharing = false;
   d->twosides = false;
   this->setProperty("draw_two_sides", false);
   d->macro_mode = false;
@@ -589,7 +595,7 @@ void Viewer::mousePressEvent(QMouseEvent* event)
       d->showDistance(event->pos());
       event->accept();
   }
-  else {
+  else{
     makeCurrent();
     CGAL::QGLViewer::mousePressEvent(event);
   }
@@ -1836,5 +1842,51 @@ bool Viewer::isClipping() const
   return d->clipping;
 }
 
-#include "Viewer.moc"
+void Viewer::setShareCam(bool b)
+{
+  static bool init = false;
+  if(b)
+  {
+    d->cam_sharing = b;
+    QString ws_url
+        = CGAL::Three::Three::mainWindow()->property("ws_url").toString();
+    if(ws_url.isEmpty())
+    {
+      QMessageBox::warning(this, "Error", "No Server configured. Please go to Edit->Preferences->Network Settings and fill the \"Camera Synchronization Server\" Field.");
+    }
+    else{
+      if(!init)
+      {
+        connect(&d->m_webSocket, &QWebSocket::connected, this, &Viewer::onSocketConnected);
+        connect(&d->m_webSocket, &QWebSocket::disconnected, this, &Viewer::socketClosed);
+        init = true;
+      }
+      d->m_webSocket.open(QUrl(ws_url));
+    }
+  }
+  else
+  {
+    d->m_webSocket.close();
+  }
+}
 
+void Viewer::onSocketConnected()
+{
+  connect(&d->m_webSocket, &QWebSocket::textMessageReceived,
+          this, &Viewer::onTextMessageSocketReceived);
+  connect(camera()->frame(), &CGAL::qglviewer::ManipulatedCameraFrame::manipulated,
+          this, [this](){
+    if(d->cam_sharing){
+      QString cam_state = dumpCameraCoordinates();
+      //send to server
+      d->m_webSocket.sendTextMessage(cam_state);
+    }
+  });
+}
+
+void Viewer::onTextMessageSocketReceived(QString message)
+{
+  moveCameraToCoordinates(message, 0.05f);
+}
+
+#include "Viewer.moc"

Polyhedron/demo/Polyhedron/Viewer.h

@@ -95,6 +95,7 @@ public:
 Q_SIGNALS:
   void sendMessage(QString);
   void doneInitGL(CGAL::Three::Viewer_interface*);
+  void socketClosed();
 public Q_SLOTS:
   //! Sets the antialiasing to true or false.
   void setAntiAliasing(bool b) Q_DECL_OVERRIDE;
@@ -130,6 +131,10 @@ public Q_SLOTS:
 
   void messageLogged(QOpenGLDebugMessage);
 
+  void setShareCam(bool);
+  void onSocketConnected();
+  void onTextMessageSocketReceived(QString message);
+
 protected:
   void paintEvent(QPaintEvent *)Q_DECL_OVERRIDE;
   void paintGL()Q_DECL_OVERRIDE;