Added an "Event" tab with a BiddingRoundControl class in it. No connections of signals and slots yet.

UIs/BeetRoundWidgets/CMakeLists.txt

@@ -36,6 +36,7 @@ if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
         views/itemdetailmapper.h views/itemdetailmapper.cpp
         widgets/comboboxdelegate.h widgets/comboboxdelegate.cpp
         widgets/spinboxdelegate.h widgets/spinboxdelegate.cpp
+        widgets/biddingroundcontrol.h widgets/biddingroundcontrol.cpp
     )
 # Define target properties for Android with Qt 6 as:
 #    set_property(TARGET ${TARGET_APP} APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR

UIs/BeetRoundWidgets/mainwindow.cpp

@@ -17,6 +17,7 @@
 #include "model/generalsortfiltermodel.h"
 #include "model/metadata.h"
 #include "model/tablemodel.h"
+#include "widgets/biddingroundcontrol.h"
 #include "widgets/comboboxdelegate.h"
 #include "widgets/spinboxdelegate.h"
 
@@ -70,6 +71,8 @@ MainWindow::MainWindow(QWidget* parent)
 
   onSelectionChanged(QItemSelection(), QItemSelection());
   onCurrentChanged(QModelIndex(), QModelIndex());
+
+  setupEventTab();
 }
 
 MainWindow::~MainWindow() { delete ui; }
@@ -176,11 +179,6 @@ void MainWindow::on_actionCheck_for_update_triggered() {
   }
 }
 
-void MainWindow::on_pushButton_clicked() {
-  const QString prefix("Backend provided by: ");
-  ui->label->setText(prefix + m_core->toString());
-}
-
 void MainWindow::openNewItemDialog() {
   showStatusMessage(tr("Invoked 'Edit|New Item'"));
   m_newItemDialog->show();
@@ -569,3 +567,13 @@ void MainWindow::createGuiDialogs() {
   m_editItemDialog = make_unique<EditItemDialog>(ui->tableView, this);
   m_editItemDialog->createContent();
 }
+
+void MainWindow::setupEventTab() {
+  QWidget* containerWidget     = new QWidget();
+  QVBoxLayout* containerLayout = new QVBoxLayout(containerWidget);
+  m_biddingRoundControl        = make_unique<BiddingRoundControl>();
+  containerLayout->addWidget(m_biddingRoundControl.get());
+
+
+  ui->tabWidget->insertTab(0, containerWidget, "Event (&1)");
+}

UIs/BeetRoundWidgets/mainwindow.h

@@ -19,6 +19,7 @@ class TableModel;
 class GeneralSortFilterModel;
 class NewItemDialog;
 class EditItemDialog;
+class BiddingRoundControl;
 
 using namespace std;
 
@@ -44,8 +45,6 @@ class MainWindow : public QMainWindow {
   void onAboutClicked();
   void on_actionCheck_for_update_triggered();
 
-  void on_pushButton_clicked();
-
   /// slots for menu actions
   void openNewItemDialog();
   void openEditItemDialog();
@@ -78,7 +77,7 @@ class MainWindow : public QMainWindow {
   shared_ptr<GeneralSortFilterModel> m_proxyModel;
   QUndoStack* m_modelUndoStack;
   unique_ptr<QUndoView> m_modelUndoView;
-
+  unique_ptr<BiddingRoundControl> m_biddingRoundControl;
   /// File actions
   unique_ptr<QAction> m_newFileAct;
   unique_ptr<QAction> m_openAct;
@@ -119,5 +118,7 @@ class MainWindow : public QMainWindow {
   void createToolsActions();
   void createHelpMenu();
   void createGuiDialogs();
+
+  void setupEventTab();
 };
 #endif  // MAINWINDOW_H

UIs/BeetRoundWidgets/mainwindow.ui

@@ -14,22 +14,22 @@
    <string>GenericQtClient</string>
   </property>
   <widget class="QWidget" name="centralwidget">
-   <layout class="QVBoxLayout" name="verticalLayout">
+   <layout class="QGridLayout" name="gridLayout_2">
-    <item>
+    <item row="0" column="0">
+     <widget class="QTabWidget" name="tabWidget">
+      <property name="currentIndex">
+       <number>0</number>
+      </property>
+      <widget class="QWidget" name="tab_user">
+       <attribute name="title">
+        <string>Mitglieder (&amp;2)</string>
+       </attribute>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="0" column="0">
          <widget class="QTableView" name="tableView"/>
         </item>
-    <item>
+       </layout>
-     <widget class="QLabel" name="label">
-      <property name="text">
-       <string>Push the button!</string>
-      </property>
       </widget>
-    </item>
-    <item>
-     <widget class="QPushButton" name="pushButton">
-      <property name="text">
-       <string>Button</string>
-      </property>
      </widget>
     </item>
    </layout>

UIs/BeetRoundWidgets/widgets/biddingroundcontrol.cpp

@@ -0,0 +1,57 @@
+#include "biddingroundcontrol.h"
+
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPushButton>
+
+BiddingRoundControl::BiddingRoundControl(QWidget* parent)
+    : QWidget{parent} {
+  m_layout = new QHBoxLayout(this);
+  m_title  = new QLabel("Bidding round control:");
+  m_status = new QLabel("(No round started yet.)");
+
+  m_newRoundButton     = new QPushButton("Start new round");
+  m_restartRoundButton = new QPushButton("Restart last round");
+  m_stopRoundButton    = new QPushButton("Stop round");
+  m_refreshRoundButton = new QPushButton("Refresh");
+
+  m_newRoundButton->setEnabled(false);
+  m_restartRoundButton->setEnabled(false);
+  m_stopRoundButton->setEnabled(false);
+
+  m_layout->addWidget(m_title);
+  m_layout->addWidget(m_status);
+  m_layout->addWidget(m_newRoundButton);
+  m_layout->addWidget(m_restartRoundButton);
+  m_layout->addWidget(m_stopRoundButton);
+  m_layout->addWidget(m_refreshRoundButton);
+
+  connect(m_newRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::triggerStartNewRound);
+  connect(m_restartRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::triggerRestartLastRound);
+  connect(m_stopRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::triggerStopCurrentRound);
+  connect(m_refreshRoundButton, &QPushButton::clicked, this,
+          &BiddingRoundControl::onRefreshCurrentRoundTriggered);
+}
+
+void BiddingRoundControl::onRefreshCurrentRoundTriggered() {
+  emit sendGetRequest(GetCurrentBiddingRound);
+}
+
+void BiddingRoundControl::onCurrentBiddingRoundChanged(int roundNumber, bool isActive) {
+  QString text = QString::number(roundNumber);
+  if (isActive) {
+    text.append(" (active)");
+    m_newRoundButton->setEnabled(false);
+    m_restartRoundButton->setEnabled(false);
+    m_stopRoundButton->setEnabled(true);
+  } else {
+    text.append(" (stopped)");
+    m_newRoundButton->setEnabled(true);
+    m_restartRoundButton->setEnabled(roundNumber > 0);
+    m_stopRoundButton->setEnabled(false);
+  }
+  m_status->setText(text);
+}

UIs/BeetRoundWidgets/widgets/biddingroundcontrol.h

@@ -0,0 +1,41 @@
+#ifndef BIDDINGROUNDCONTROL_H
+#define BIDDINGROUNDCONTROL_H
+
+#include <QWidget>
+#include "model/metadata.h"
+
+class QPushButton;
+class QLabel;
+class QHBoxLayout;
+class BiddingRoundControl : public QWidget {
+  Q_OBJECT
+ public:
+  explicit BiddingRoundControl(QWidget* parent = nullptr);
+
+ signals:
+  void sendGetRequest(GetRequestTypes type);
+
+  void triggerStartNewRound();
+  void triggerRestartLastRound();
+  void triggerStopCurrentRound();
+  // void refreshCurrentRound();
+
+ public slots:
+  /// button slots
+  void onRefreshCurrentRoundTriggered();
+
+  /// event slots
+  void onCurrentBiddingRoundChanged(int roundNumber, bool isActive);
+
+ private:
+  QHBoxLayout* m_layout = nullptr;
+  QLabel* m_title       = nullptr;
+  QLabel* m_status      = nullptr;
+
+  QPushButton* m_newRoundButton     = nullptr;
+  QPushButton* m_restartRoundButton = nullptr;
+  QPushButton* m_stopRoundButton    = nullptr;
+  QPushButton* m_refreshRoundButton = nullptr;
+};
+
+#endif  // BIDDINGROUNDCONTROL_H

libs/BeetRoundCore/model/metadata.h

@@ -82,6 +82,9 @@ static const QString ITEM_KEY_STRING  = "item";
 /// file naming
 static const QString ITEMS_FILE_NAME = ITEMS_KEY_STRING + ".json";
 
+/// server communication
+enum GetRequestTypes { GetCurrentBiddingRound };
+
 /// functions
 static UserRoles GET_ROLE_FOR_COLUMN(const int column) {
   switch (column) {