qt: Follow Qt docs when implementing rowCount and columnCount

src/qt/addresstablemodel.cpp

@@ -177,13 +177,17 @@ AddressTableModel::~AddressTableModel()
 
 int AddressTableModel::rowCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return priv->size();
 }
 
 int AddressTableModel::columnCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return columns.length();
 }
 

src/qt/bantablemodel.cpp

@@ -98,13 +98,17 @@ BanTableModel::~BanTableModel()
 
 int BanTableModel::rowCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return priv->size();
 }
 
 int BanTableModel::columnCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return columns.length();
 }
 

src/qt/peertablemodel.cpp

@@ -134,13 +134,17 @@ void PeerTableModel::stopAutoRefresh()
 
 int PeerTableModel::rowCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return priv->size();
 }
 
 int PeerTableModel::columnCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return columns.length();
 }
 

src/qt/recentrequeststablemodel.cpp

@@ -36,15 +36,17 @@ RecentRequestsTableModel::~RecentRequestsTableModel()
 
 int RecentRequestsTableModel::rowCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
-
+        return 0;
+    }
     return list.length();
 }
 
 int RecentRequestsTableModel::columnCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
-
+        return 0;
+    }
     return columns.length();
 }
 

src/qt/transactiontablemodel.cpp

@@ -289,13 +289,17 @@ void TransactionTableModel::updateConfirmations()
 
 int TransactionTableModel::rowCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return priv->size();
 }
 
 int TransactionTableModel::columnCount(const QModelIndex &parent) const
 {
-    Q_UNUSED(parent);
+    if (parent.isValid()) {
+        return 0;
+    }
     return columns.length();
 }