Added a ModelSummary class to make the overview over the model content accessible via QProperty system & a SummaryWidget to show this information. Only property rowCount as a proof of concept. Other properties will follow.

UIs/BeetRoundWidgets/widgets/summarywidget.cpp

@@ -0,0 +1,30 @@
+#include "summarywidget.h"
+
+#include <QLabel>
+#include <QProperty>
+#include <QVBoxLayout>
+
+#include <model/modelsummary.h>
+
+SummaryWidget::SummaryWidget(std::shared_ptr<ModelSummary> modelSummary, QWidget* parent)
+    : QWidget{parent}
+    , m_modelSummary(modelSummary) {
+  QVBoxLayout* mainLayout = new QVBoxLayout(this);
+
+  QProperty<int> nRows(-1);
+
+  QHBoxLayout* footerLayout = new QHBoxLayout();
+  QLabel* rowCountLabel     = new QLabel("Row count:");
+  m_rowCoundValueLabel      = new QLabel(QString::number(nRows));
+
+  QObject::connect(m_modelSummary.get(), &ModelSummary::rowCountChanged, [&]() {
+    m_rowCoundValueLabel->setText(QString::number(m_modelSummary->rowCount()));
+  });
+  m_modelSummary->bindableRowCount().setBinding([&]() { return nRows.value(); });
+
+  footerLayout->addWidget(rowCountLabel);
+  footerLayout->addWidget(m_rowCoundValueLabel);
+  mainLayout->addLayout(footerLayout);
+
+  setLayout(mainLayout);
+}

UIs/BeetRoundWidgets/widgets/summarywidget.h

@@ -0,0 +1,21 @@
+#ifndef SUMMARYWIDGET_H
+#define SUMMARYWIDGET_H
+
+#include <QWidget>
+
+class ModelSummary;
+class QLabel;
+
+class SummaryWidget : public QWidget {
+  Q_OBJECT
+
+ public:
+  explicit SummaryWidget(std::shared_ptr<ModelSummary> modelSummary, QWidget* parent = nullptr);
+
+ private:
+  std::shared_ptr<ModelSummary> m_modelSummary;
+
+  QLabel* m_rowCoundValueLabel;
+};
+
+#endif  // SUMMARYWIDGET_H