client: fix TableModel Region

- Use `uint32_t` as done in server representation
- Use rowMin = 1 and rowMax = 0 to represent empty model

This is because we cannot set negative values so setting to zero would
make empty model and single row models indistinguishable.

client/src/network/connection.cpp

@@ -425,7 +425,7 @@ void Connection::releaseTableModel(TableModel* tableModel)
   tableModel->m_handle = invalidHandle;
 }
 
-void Connection::setTableModelRegion(TableModel* tableModel, int columnMin, int columnMax, int rowMin, int rowMax)
+void Connection::setTableModelRegion(TableModel* tableModel, uint32_t columnMin, uint32_t columnMax, uint32_t rowMin, uint32_t rowMax)
 {
   auto event = Message::newEvent(Message::Command::TableModelSetRegion);
   event->write(tableModel->handle());

client/src/network/connection.hpp

@@ -152,7 +152,7 @@ class Connection : public QObject, public std::enable_shared_from_this<Connectio
 
     [[nodiscard]] int getTableModel(const ObjectPtr& object, std::function<void(const TableModelPtr&, std::optional<const Error>)> callback);
     void releaseTableModel(TableModel* tableModel);
-    void setTableModelRegion(TableModel* tableModel, int columnMin, int columnMax, int rowMin, int rowMax);
+    void setTableModelRegion(TableModel* tableModel, uint32_t columnMin, uint32_t columnMax, uint32_t rowMin, uint32_t rowMax);
 
     [[nodiscard]] int getTileData(Board& object);
 

client/src/network/tablemodel.cpp

@@ -72,7 +72,7 @@ QString TableModel::getValue(int column, int row) const
   return m_texts.value(ColumnRow(column, row));
 }
 
-void TableModel::setRegion(int columnMin, int columnMax, int rowMin, int rowMax)
+void TableModel::setRegion(uint32_t columnMin, uint32_t columnMax, uint32_t rowMin, uint32_t rowMax)
 {
   if(m_region.columnMin != columnMin ||
      m_region.columnMax != columnMax ||

client/src/network/tablemodel.hpp

@@ -45,10 +45,10 @@ class TableModel final : public QAbstractTableModel
     int m_rowCount;
     struct Region
     {
-      int rowMin = 0;
-      int rowMax = -1;
-      int columnMin = 0;
-      int columnMax = -1;
+      uint32_t rowMin = 0;
+      uint32_t rowMax = -1;
+      uint32_t columnMin = 0;
+      uint32_t columnMax = -1;
     } m_region;
     QMap<ColumnRow, QString> m_texts;
 
@@ -71,7 +71,7 @@ class TableModel final : public QAbstractTableModel
     QString getRowObjectId(int row) const;
     QString getValue(int column, int row) const;
 
-    void setRegion(int columnMin, int columnMax, int rowMin, int rowMax);
+    void setRegion(uint32_t columnMin, uint32_t columnMax, uint32_t rowMin, uint32_t rowMax);
 };
 
 #endif

client/src/widget/tablewidget.cpp

@@ -93,27 +93,39 @@ void TableWidget::updateRegion()
   const int columnCount = m_model->columnCount();
   const int rowCount = m_model->rowCount();
 
-  if(columnCount == 0 || rowCount == 0)
-    return;
-
   const QRect r = viewport()->rect();
   const QModelIndex topLeft = indexAt(r.topLeft());
 
   int rowMin = qMax(topLeft.row(), 0);
   int rowMax = indexAt(r.bottomLeft()).row();
-  if(rowMax == -1)
+
+  if(rowCount == 0)
+  {
+    // Invalid region to represent empty model
+    rowMin = 1;
+    rowMax = 0;
+  }
+  else if(rowMax == -1)
     rowMax = rowCount - 1;
   else
     rowMax = qMin(rowMax + 1, rowCount - 1);
 
   int columnMin = qMax(topLeft.column(), 0);
   int columnMax = indexAt(r.topRight()).column();
+
+  if(columnCount == 0)
+  {
+    // Invalid region to represent empty model
+    columnMin = 1;
+    columnMax = 0;
+  }
   if(columnMax == -1)
     columnMax = columnCount - 1;
   else
     columnMax = qMin(columnMax + 1, columnCount - 1);
 
-  m_model->setRegion(columnMin, columnMax, rowMin, rowMax);
+  m_model->setRegion(uint32_t(columnMin), uint32_t(columnMax),
+                     uint32_t(rowMin), uint32_t(rowMax));
 }
 
 void TableWidget::mouseMoveEvent(QMouseEvent* event)