resize column to contents only when they're visible

refactor updatePeerCountryResolutionState
deprecate m_resolveCountries var

src/gui/properties/peerlistwidget.cpp

@@ -57,7 +57,6 @@
 PeerListWidget::PeerListWidget(PropertiesWidget *parent)
     : QTreeView(parent)
     , m_properties(parent)
-    , m_resolveCountries(false)
 {
     // Load settings
     loadSettings();
@@ -91,9 +90,9 @@ PeerListWidget::PeerListWidget(PropertiesWidget *parent)
     setModel(m_proxyModel);
     hideColumn(PeerListDelegate::IP_HIDDEN);
     hideColumn(PeerListDelegate::COL_COUNT);
-    if (!Preferences::instance()->resolvePeerCountries())
+    m_resolveCountries = Preferences::instance()->resolvePeerCountries();
+    if (!m_resolveCountries)
         hideColumn(PeerListDelegate::COUNTRY);
-    m_wasCountryColHidden = isColumnHidden(PeerListDelegate::COUNTRY);
     //Ensure that at least one column is visible at all times
     bool atLeastOne = false;
     for (unsigned int i = 0; i < PeerListDelegate::IP_HIDDEN; i++) {
@@ -108,7 +107,7 @@ PeerListWidget::PeerListWidget(PropertiesWidget *parent)
     //its size is 0, because explicitly 'showing' the column isn't enough
     //in the above scenario.
     for (unsigned int i = 0; i < PeerListDelegate::IP_HIDDEN; i++)
-        if (!columnWidth(i))
+        if ((columnWidth(i) <= 0) && !isColumnHidden(i))
             resizeColumnToContents(i);
     // Context menu
     setContextMenuPolicy(Qt::CustomContextMenu);
@@ -208,14 +207,12 @@ void PeerListWidget::updatePeerCountryResolutionState()
         m_resolveCountries = !m_resolveCountries;
         if (m_resolveCountries) {
             loadPeers(m_properties->getCurrentTorrent());
-            if (!m_wasCountryColHidden) {
+            showColumn(PeerListDelegate::COUNTRY);
-                showColumn(PeerListDelegate::COUNTRY);
+            if (columnWidth(PeerListDelegate::COUNTRY) <= 0)
                 resizeColumnToContents(PeerListDelegate::COUNTRY);
-            }
         }
         else {
             hideColumn(PeerListDelegate::COUNTRY);
-            m_wasCountryColHidden = false; // to forcefully enable that column if the user decides to resolve countries again
         }
     }
 }

src/gui/properties/peerlistwidget.h

@@ -94,7 +94,6 @@ private:
     QPointer<Net::ReverseResolution> m_resolver;
     PropertiesWidget *m_properties;
     bool m_resolveCountries;
-    bool m_wasCountryColHidden;
     QShortcut *m_copyHotkey;
 };