qt: add 'count' property to PlayerControlbarModel

Signed-off-by: Pierre Lamot <pierre@videolabs.io>

modules/gui/qt/player/playercontrolbarmodel.cpp

@@ -74,6 +74,10 @@ static const QVector<PlayerControlBarModel::IconToolButton> MINI_TB_DEFAULT[defa
 PlayerControlBarModel::PlayerControlBarModel(QObject *_parent) : QAbstractListModel(_parent)
 {
     configName = "MainPlayerToolbar";
+
+    connect(this, &QAbstractListModel::rowsInserted, this, &PlayerControlBarModel::countChanged);
+    connect(this, &QAbstractListModel::rowsRemoved, this, &PlayerControlBarModel::countChanged);
+    connect(this, &QAbstractListModel::modelReset, this, &PlayerControlBarModel::countChanged);
 }
 
 void PlayerControlBarModel::saveConfig()

modules/gui/qt/player/playercontrolbarmodel.hpp

@@ -29,6 +29,8 @@ class PlayerControlBarModel : public QAbstractListModel
     Q_OBJECT
     Q_PROPERTY(QmlMainContext* mainCtx READ getMainCtx WRITE setMainCtx NOTIFY ctxChanged)
     Q_PROPERTY(QString configName READ getConfigName WRITE setConfigName NOTIFY configNameChanged)
+    Q_PROPERTY(int count READ rowCount NOTIFY countChanged)
+
 
 public:
     explicit PlayerControlBarModel(QObject *_parent = nullptr);
@@ -104,6 +106,7 @@ public:
 signals:
     void ctxChanged(QmlMainContext*);
     void configNameChanged(QString);
+    void countChanged();
 
 protected:
     intf_thread_t       *p_intf  = nullptr;