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

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