Upgrade to QT 5 and remove GTK style from QT frontend.

build-howto.md → README.md

@@ -20,7 +20,7 @@ Optional:
 
 Mandatory if you want to build the QT version of ProviewR:
 
-> apt-get install qt4-dev-tools libphonon-dev
+> apt-get install qt5-default
 
 Mandatory if you want to build the GTK version of ProviewR:
 

src/tools/bld/src/rules.mk

@@ -84,7 +84,7 @@ endif
 
 $(bld_dir)/%_moc.o : %.cqt
 	@ echo "Generating $(sname)_moc.cpp from $(sname).h using moc"
-	@ moc $(csetos) $(sname).h -o $(bld_dir)/$(sname)_moc.cpp
+	@ moc -DPWRE_CONF_QT $(pwre_conf_cc_define) $(sname).h -o $(bld_dir)/$(sname)_moc.cpp
 	@ echo "Compiling $(sname)_moc.cpp"
 	@ $(cxx) $(cxxflags) $(csetos) $(cinc) -o $(bld_dir)/$(sname)_moc.o  $(bld_dir)/$(sname)_moc.cpp
 
@@ -123,7 +123,7 @@ ifeq ($(nodep),)
 	  | sed '\''s|$*\.o[ ]*|$(obj_dir)/&|g'\'' > $(obj_dir)/$(sname).d'
 endif
 	@ echo "Generating $(sname)_moc.cpp from $(sname).h using moc"
-	@ moc $(csetos) $(cinc) $(sname).h \
+	@ moc -DPWRE_CONF_QT $(pwre_conf_cc_define) $(cinc) $(sname).h \
 	  -o $(bld_dir)/$(sname)_moc.cpp
 	@ echo "Compiling $(sname)_moc.cpp"
 	@ $(cxx) $(cxxflags) $(csetos) $(cinc) -o $(bld_dir)/$(sname)_moc.o $(bld_dir)/$(sname)_moc.cpp

src/tools/bld/src/variables.mk

@@ -88,7 +88,7 @@ pre_so =
 
 log_done	=
 ifeq ($(pwre_conf_qt),1)
-  csetos 	:= -DPWRE_CONF_QT $(pwre_conf_cc_define)
+  csetos 	:= -DPWRE_CONF_QT $(pwre_conf_cc_define) -fPIC
   cinc          := -I$(inc_dir) -I$(einc_dir) -I$(co_source) $(pwre_conf_incdir) $(pwre_conf_incdirqt)
 else
   ifeq ($(pwre_conf_gtk),1)
@@ -158,7 +158,7 @@ else
 endif
 
 explinkflags	:= $(cross_compile) -g -L$(elib_dir)
-cxxflags	:= -std=gnu++11 $(cflags)
+cxxflags	:= -std=gnu++11 $(cflags) -Wno-deprecated-copy
 clis		= /lis=$(list)
 dolist	= /lis=$(list)
 domap		= -Xlinker -Map -Xlinker $(map)

src/tools/pwre/src/pwre_configure.sh

@@ -190,8 +190,8 @@ pwre_config_check_lib()
                 conf_libgtk=$conf_libgtk" \\\`pkg-config --libs gtk+-2.0\\\`"
                 conf_incdirgtk=$conf_incdirgtk" \\\`pkg-config --cflags gtk+-2.0\\\`"
 	    elif test $3 == "qt"; then
-                conf_libqt=$conf_libqt" \\\`pkg-config --libs QtCore QtGui QtNetwork phonon\\\`"
-                conf_incdirqt=$conf_incdirqt" \\\`pkg-config --cflags QtCore QtGui QtNetwork phonon\\\`"
+                conf_libqt=$conf_libqt" \\\`pkg-config --libs Qt5Core Qt5Widgets Qt5Gui Qt5Network Qt5PrintSupport Qt5Multimedia Qt5MultimediaWidgets Qt5WebSockets\\\`"
+                conf_incdirqt=$conf_incdirqt" \\\`pkg-config --cflags Qt5Core Qt5Widgets Qt5Gui Qt5Network Qt5PrintSupport Qt5Multimedia Qt5MultimediaWidgets Qt5WebSockets\\\`"
 	    elif test $3 == "gst"; then
                 conf_libgst=$conf_libgst" \\\`pkg-config --libs gstreamer-video-1.0 gstreamer-1.0\\\`"
                 conf_incdirgst=$conf_incdirgst" \\\`pkg-config --cflags gstreamer-video-1.0 gstreamer-1.0\\\`"
@@ -352,11 +352,11 @@ if [ $pwre_hw == "hw_arm" ] && [ $ebuild -eq 1 ]; then
     echo "Arm ebuild"
 
 #    if [ $pwre_conf_qt -eq 1 ]; then
-        pwre_config_check_lib qt        QT      qt qt 0 "/usr/lib/libQtGui.so:/usr/lib/$hwpl-linux-$gnu/libQtGui.so"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtGui"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtCore/QtCore"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtGui/QtGui"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtNetwork/QtNetwork"
+        pwre_config_check_lib qt        QT      qt qt 0 "/usr/lib/$hwpl-linux-$gnu/libQt5Gui.so"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtCore"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtCore/QtCore"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtWidgets/QtWidgets"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtGui/QtGui"
 #    fi
 #    if [ $pwre_conf_gtk -eq 1 ]; then
         pwre_config_check_lib gtk       GTK      gtk gtk 0 "/usr/lib/libgtk-x11-2.0.so:/usr/lib/$hwpl-linux-$gnu/libgtk-x11-2.0.so"
@@ -431,11 +431,11 @@ else
     echo ""
     echo "Gui either Qt or Gtk :"
 #   if [ ! -z $pwre_conf_qt ]; then
-        pwre_config_check_lib qt        QT      qt qt 0 "/usr/lib/libQtGui.so:/usr/lib/$hwpl-linux-$gnu/libQtGui.so"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtGui"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtCore/QtCore"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtGui/QtGui"
-        pwre_config_check_include qt    QT   0 "/usr/include/qt4/QtNetwork/QtNetwork"
+        pwre_config_check_lib qt        QT      qt qt 0 "/usr/lib/$hwpl-linux-$gnu/libQt5Gui.so"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtCore"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtCore/QtCore"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtWidgets/QtWidgets"
+        pwre_config_check_include qt    QT   0 "/usr/include/$hwpl-linux-$gnu/qt5/QtGui/QtGui"
 #   else
         pwre_config_check_lib gtk       GTK      gtk gtk 0 "/usr/lib/libgtk-x11-2.0.so:/usr/lib/$hwpl-linux-$gnu/libgtk-x11-2.0.so"
         pwre_config_check_include gtk   GTK   0 "/usr/local/include/gtk-2.0/gtk.h:/usr/local/include/gtk-2.0/gtk/gtk.h:/usr/include/gtk-2.0/gtk/gtk.h"

wb/lib/wb/qt/wb_vsel_qt.cqt

@@ -267,6 +267,8 @@ WVselQt::WVselQt(pwr_tStatus* status, void* wv_parent_ctx,
   volumelist->setSelectionMode(QAbstractItemView::SingleSelection);
 
   volumelist->setColumnCount(3);
+  volumelist->header()->setSectionResizeMode(0, QHeaderView::Stretch);
+  volumelist->header()->setStretchLastSection(false);
   volumelist->header()->close();
 
   QDialogButtonBox* buttons = new QDialogButtonBox();

xtt/lib/cow/qt/cow_style_qt.cqt

-/*
- * ProviewR   Open Source Process Control.
- * Copyright (C) 2005-2019 SSAB EMEA AB.
- *
- * This file is part of ProviewR.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with ProviewR. If not, see <http://www.gnu.org/licenses/>
- *
- * Linking ProviewR statically or dynamically with other modules is
- * making a combined work based on ProviewR. Thus, the terms and
- * conditions of the GNU General Public License cover the whole
- * combination.
- *
- * In addition, as a special exception, the copyright holders of
- * ProviewR give you permission to, from the build function in the
- * ProviewR Configurator, combine ProviewR with modules generated by the
- * ProviewR PLC Editor to a PLC program, regardless of the license
- * terms of these modules. You may copy and distribute the resulting
- * combined work under the terms of your choice, provided that every
- * copy of the combined work is accompanied by a complete copy of
- * the source code of ProviewR (the version used to produce the
- * combined work), being distributed under the terms of the GNU
- * General Public License plus this exception.
- */
-
-#include "co_dcli.h"
-
-#include "cow_style_qt.h"
-
-#include <QApplication>
-#include <QDialogButtonBox>
-#include <QFile>
-#include <QTextStream>
-
-PwrStyle::PwrStyle() : QGtkStyle() {
-  loadPalette("$HOME/.pwr_style");
-}
-
-PwrStyle::~PwrStyle() {
-  if (pal) {
-    delete pal;
-  }
-}
-
-int PwrStyle::pixelMetric(PixelMetric which, const QStyleOption* option,
-    const QWidget* widget) const {
-  switch (which) {
-  case PM_LayoutLeftMargin:
-  case PM_LayoutTopMargin:
-  case PM_LayoutRightMargin:
-  case PM_LayoutBottomMargin:
-  case PM_LayoutHorizontalSpacing:
-  case PM_LayoutVerticalSpacing:
-  case PM_ToolBarItemMargin:
-  case PM_ToolBarItemSpacing:
-    return 0;
-  default:
-    return QGtkStyle::pixelMetric(which, option, widget);
-  }
-}
-
-int PwrStyle::styleHint(StyleHint hint, const QStyleOption* option,
-    const QWidget* widget, QStyleHintReturn* returnData) const {
-  if (hint == SH_DialogButtonLayout) {
-    return QDialogButtonBox::WinLayout;
-  }
-
-  return QGtkStyle::styleHint(hint, option, widget, returnData);
-}
-
-void PwrStyle::loadPalette(const char* path) {
-  char fname[200];
-  dcli_translate_filename(fname, path);
-  QFile f(fname);
-  if (!f.open(QFile::ReadOnly | QFile::Text)) {
-    return;
-  }
-  pal = new QPalette(standardPalette());
-  QTextStream in(&f);
-  QStringList lines = in.readAll().split('\n', QString::SkipEmptyParts);
-  for (int i = 0; i < lines.size(); i++) {
-    QStringList line = lines[i].split(' ', QString::SkipEmptyParts);
-    if (line.size() < 2) {
-      fprintf(stderr, "Error parsing line %d in file %s\n", (i+1), fname);
-      continue;
-    }
-    QPalette::ColorRole role = QPalette::ColorRole(atoi(qPrintable(line[0])));
-    pal->setBrush(QPalette::ColorGroup(0), role, QColor(line[1]));
-    pal->setBrush(QPalette::ColorGroup(2), role, QColor(line[1]));
-    if (line.size() > 2 && QColor(line[2]).isValid()) {
-      pal->setBrush(QPalette::ColorGroup(1), role, QColor(line[2]));
-    } else {
-      pal->setBrush(QPalette::ColorGroup(1), role, QColor(line[1]));
-    }
-  }
-  QApplication::setPalette(*pal);
-}
-
-void PwrStyle::drawPrimitive(PrimitiveElement element,
-    const QStyleOption *option, QPainter *painter, const QWidget *widget) const {
-  if (pal) {
-    if (element == PE_PanelButtonCommand) {
-      QWindowsStyle::drawPrimitive(element, option, painter, widget);
-      return;
-    }
-    QCleanlooksStyle::drawPrimitive(element, option, painter, widget);
-  } else {
-    QGtkStyle::drawPrimitive(element, option, painter, widget);
-  }
-}
-
-void PwrStyle::drawControl(ControlElement control, const QStyleOption *option,
-    QPainter *painter, const QWidget *widget) const {
-  if (pal) {
-    QCleanlooksStyle::drawControl(control, option, painter, widget);
-  } else {
-    QGtkStyle::drawControl(control, option, painter, widget);
-  }
-}
-
-void PwrStyle::drawComplexControl(ComplexControl control,
-    const QStyleOptionComplex *option, QPainter *painter, const QWidget *widget)
-    const {
-  if (pal) {
-    QCleanlooksStyle::drawComplexControl(control, option, painter, widget);
-  } else {
-    QGtkStyle::drawComplexControl(control, option, painter, widget);
-  }
-}
-
-void PwrStyle::polish(QApplication *app) {
-  if (pal) {
-    QCleanlooksStyle::polish(app);
-  } else {
-    QGtkStyle::polish(app);
-  }
-}
-
-void PwrStyle::unpolish(QApplication *app) {
-  if (pal) {
-    QCleanlooksStyle::unpolish(app);
-  } else {
-    QGtkStyle::unpolish(app);
-  }
-}
\ No newline at end of file

xtt/lib/cow/qt/cow_style_qt.h

@@ -37,32 +37,20 @@
 #ifndef cow_style_qt_h
 #define cow_style_qt_h
 
-#include <QGtkStyle>
-
-class PwrStyle : public QGtkStyle {
-  Q_OBJECT
+#include <QProxyStyle>
 
+class PwrStyle : public QProxyStyle {
 public:
   PwrStyle();
   ~PwrStyle();
 
-  int pixelMetric(PixelMetric which, const QStyleOption* option,
+  int pixelMetric(PixelMetric which, const QStyleOption* option = 0,
       const QWidget* widget = 0) const;
-  int styleHint(StyleHint hint, const QStyleOption* option,
-      const QWidget* widget, QStyleHintReturn* returnData = 0) const;
+  int styleHint(StyleHint hint, const QStyleOption* option = 0,
+      const QWidget* widget = 0, QStyleHintReturn* returnData = 0) const;
 
   void loadPalette(const char* path);
 
-  void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
-                       QPainter *painter, const QWidget *widget) const;
-  void drawControl(ControlElement control, const QStyleOption *option,
-                   QPainter *painter, const QWidget *widget) const;
-  void drawComplexControl(ComplexControl control,
-                          const QStyleOptionComplex *option, QPainter *painter,
-                          const QWidget *widget) const;
-  void polish(QApplication *app);
-  void unpolish(QApplication *app);
-
 private:
   QPalette *pal = NULL;
 };

xtt/lib/cow/qt/cow_wow_qt.cqt

@@ -166,7 +166,7 @@ void CoWowQt::DisplayError(
 
   QMessageBox msgBox(QMessageBox::Critical, fl(title), ctext,
       QMessageBox::NoButton, object->parent_wid->window());
-  QDialogButtonBox* buttonBox = qFindChild<QDialogButtonBox*>(&msgBox);
+  QDialogButtonBox* buttonBox = msgBox.findChildren<QDialogButtonBox*>()[0];
   Q_ASSERT(buttonBox != 0);
 
   QPushButton* button = msgBox.addButton(QMessageBox::Ok);

xtt/lib/glow/qt/glow_draw_qt.cqt

@@ -343,12 +343,12 @@ int GlowDrawQt::event_handler(QEvent* event, QWidget* target)
 
       keysym = keyEvent->key();
       if (keysym >= Qt::Key_Space && keysym <= Qt::Key_AsciiTilde) {
-        char buff = QChar(keysym).toAscii();
+        const char* buff = qPrintable(keyEvent->text());
 
         if (keyEvent->modifiers() & Qt::ControlModifier) {
-          sts = ctx->event_handler(glow_eEvent_Key_CtrlAscii, 0, 0, buff, 0);
+          sts = ctx->event_handler(glow_eEvent_Key_CtrlAscii, 0, 0, buff[0], 0);
         } else {
-          sts = ctx->event_handler(glow_eEvent_Key_Ascii, 0, 0, buff, 0);
+          sts = ctx->event_handler(glow_eEvent_Key_Ascii, 0, 0, buff[0], 0);
         }
       } else {
         switch (keysym) {

xtt/lib/xtt/qt/xtt_stream_qt.cqt

@@ -52,9 +52,7 @@
 #include <QLabel>
 #include <QMenu>
 #include <QPainter>
-
-#include <phonon/MediaObject>
-#include <phonon/MediaSource>
+#include <QVideoWidget>
 
 /* This function is called when the main window is closed */
 void XttStreamQtWidget::closeEvent(QCloseEvent* event)
@@ -74,7 +72,7 @@ void XttStreamQtWidget::closeEvent(QCloseEvent* event)
  * new position here. */
 void XttStreamQtWidget::slider_cb(int value)
 {
-  stream->playbin2->seek(value * 1000);
+  stream->playbin2->setPosition(value * 1000);
 }
 
 static void refresh_ui(XttStreamQt* strm)
@@ -86,11 +84,11 @@ static void refresh_ui(XttStreamQt* strm)
 
   /* We do not want to update anything unless we are in the PAUSED or PLAYING
    * states */
-  if (!(strm->state == Phonon::PausedState || strm->state == Phonon::PlayingState)) {
+  if (!(strm->state == QMediaPlayer::PausedState || strm->state == QMediaPlayer::PlayingState)) {
     return;
   }
 
-  qint64 current = strm->playbin2->totalTime();
+  qint64 current = strm->playbin2->duration();
   strm->slider->setRange(0, current / 1000);
   strm->toplevel->update();
 }
@@ -105,9 +103,9 @@ void XttStreamQt::reconnect(void* data)
 {
   XttStreamQt* strm = (XttStreamQt*)data;
 
-  printf("Try to reconnect %d 1\n", strm->playbin2->mediaObject()->state());
+  printf("Try to reconnect %d 1\n", strm->playbin2->state());
 
-  if (strm->playbin2->mediaObject()->state() == Phonon::PlayingState) {
+  if (strm->playbin2->state() == QMediaPlayer::PlayingState) {
     return;
   }
 
@@ -142,7 +140,7 @@ void XttStreamQt::reconnect(void* data)
       strcpy(luri, strm->uri);
     }
 
-    strm->playbin2->load(Phonon::MediaSource(QUrl(fl(luri))));
+    strm->playbin2->setMedia(QUrl(fl(luri)));
   } else {
     strm->playbin2->play();
   }
@@ -159,12 +157,13 @@ static void refresh(void* data)
 
 /* This function is called when the pipeline changes states. We use it to
  * keep track of the current state. */
-void XttStreamQtWidget::state_changed_cb(Phonon::State new_state, Phonon::State old_state)
+void XttStreamQtWidget::state_changed_cb(QMediaPlayer::State new_state, QMediaPlayer::State old_state)
 {
-  if (new_state == Phonon::ErrorState) {
-    printf("Error: %s\n", qPrintable(stream->playbin2->mediaObject()->errorString()));
+  if (stream->playbin2->error() != QMediaPlayer::Error::NoError) {
+    printf("Error: %s\n", qPrintable(stream->playbin2->errorString()));
 
-    if (stream->playbin2->mediaObject()->errorType() == Phonon::FatalError) {
+    if (stream->playbin2->error() == QMediaPlayer::ResourceError ||
+        stream->playbin2->error() == QMediaPlayer::ServiceMissingError) {
       stream->no_uri = 1;
     }
 
@@ -178,8 +177,8 @@ void XttStreamQtWidget::state_changed_cb(Phonon::State new_state, Phonon::State
     stream->reconnect_timerid->add(
         int(stream->reconnect_time * 1000), stream->reconnect, stream);
   }
-  if (stream->state == Phonon::StoppedState
-      && new_state == Phonon::PausedState) {
+  if (stream->state == QMediaPlayer::StoppedState
+      && new_state == QMediaPlayer::PausedState) {
     /* For extra responsiveness, we refresh the GUI as soon as we reach the
      * PAUSED state */
     refresh_ui(stream);
@@ -347,9 +346,9 @@ XttStreamQt::XttStreamQt(void* st_parent_ctx, const char* name,
   toplevel = new XttStreamQtWidget(this);
 
   /* Create the elements */
-  playbin2 = new Phonon::VideoPlayer(toplevel);
-  QObject::connect(playbin2->mediaObject(), SIGNAL(stateChanged(Phonon::State, Phonon::State)),
-      toplevel, SLOT(state_changed_cb(Phonon::State, Phonon::State)));
+  playbin2 = new QMediaPlayer(toplevel, QMediaPlayer::VideoSurface);
+  QObject::connect(playbin2, SIGNAL(stateChanged(QMediaPlayer::State, QMediaPlayer::State)),
+      toplevel, SLOT(state_changed_cb(QMediaPlayer::State, QMediaPlayer::State)));
 
   /* Set the URI to play, eg "http://192.168.67.248/mjpg/video.mjpg" */
   char luri[250];
@@ -374,7 +373,7 @@ XttStreamQt::XttStreamQt(void* st_parent_ctx, const char* name,
     strcpy(luri, uri);
   }
 
-  playbin2->load(Phonon::MediaSource(QUrl(fl(luri))));
+  playbin2->setMedia(QUrl(fl(luri)));
 
   if (!embedded) {
     toplevel->setWindowTitle(QString::fromLatin1(name));
@@ -496,17 +495,19 @@ XttStreamQt::XttStreamQt(void* st_parent_ctx, const char* name,
     }
   }
 
-  add_expanding(main_layout, playbin2);
+  QVideoWidget *videoWidget = new QVideoWidget();
+  add_expanding(main_layout, videoWidget);
+  playbin2->setVideoOutput(videoWidget);
 
   if (options & strm_mOptions_VideoControlPanel) {
     QToolBar* controlbuttons = new QToolBar();
 
     addToolItem(playbin2, controlbuttons, "Play",
-        SLOT(Phonon::VideoPlayer::play()), "$pwr_exe/xtt_play.png");
+        SLOT(QMediaPlayer::play()), "$pwr_exe/xtt_play.png");
     addToolItem(playbin2, controlbuttons, "Pause",
-        SLOT(Phonon::VideoPlayer::pause()), "$pwr_exe/xtt_pause.png");
+        SLOT(QMediaPlayer::pause()), "$pwr_exe/xtt_pause.png");
     addToolItem(playbin2, controlbuttons, "Stop",
-        SLOT(Phonon::VideoPlayer::stop()), "$pwr_exe/xtt_stop.png");
+        SLOT(QMediaPlayer::stop()), "$pwr_exe/xtt_stop.png");
 
     if (options & strm_mOptions_VideoProgressBar) {
       slider = new QSlider(Qt::Horizontal);

xtt/lib/xtt/qt/xtt_stream_qt.h

@@ -42,19 +42,18 @@
 #include "cow_wow_qt.h"
 
 #include <QLabel>
+#include <QMediaPlayer>
 #include <QMouseEvent>
 #include <QResizeEvent>
 #include <QToolBar>
 #include <QWheelEvent>
 
-#include <phonon/VideoPlayer>
-
 class XttStreamQtWidget;
 
 class XttStreamQt : public XttStream {
 public:
-  Phonon::VideoPlayer* playbin2; /* Our one and only pipeline */
-  Phonon::State state; /* Current state of the pipeline */
+  QMediaPlayer* playbin2; /* Our one and only pipeline */
+  QMediaPlayer::State state; /* Current state of the pipeline */
   pwr_tTime mb_press_time;
   int mb_press_x;
   int mb_press_y;
@@ -110,7 +109,7 @@ protected:
 
 public slots:
   void slider_cb(int value);
-  void state_changed_cb(Phonon::State new_state, Phonon::State old_state);
+  void state_changed_cb(QMediaPlayer::State new_state, QMediaPlayer::State old_state);
 
   void activate_preset_position();
   void activate_preset_store_pos();