fix issue where building stats don't update while the building is kept selected

src/ui/MainWindow.cpp

@@ -45,6 +45,9 @@ MainWindow::MainWindow(Simulation* sim, const GameConfig* config,
     connect(m_gameWorldView, SIGNAL(stateUpdated(Tick, int, double)),
             this, SLOT(onStateUpdated(Tick, int, double)));  // for affordability
 
+    connect(m_gameWorldView, SIGNAL(stateUpdated(Tick, int, double)),
+            m_selectedBuildingPanel, SLOT(onStateUpdated(Tick, int, double)));
+
     connect(m_gameWorldView, SIGNAL(gameOver()),
             this, SLOT(onGameOver()));
 

src/ui/SelectedBuildingPanel.cpp

@@ -188,6 +188,11 @@ void SelectedBuildingPanel::buildSingle(EntityId id)
         m_clearBeltBtn->hide();
     }
 
+    refreshBuffers(b);
+}
+
+void SelectedBuildingPanel::refreshBuffers(const Building* b)
+{
     QString bufText;
     if (!b->inputBuffer.counts.empty())
     {
@@ -221,6 +226,18 @@ void SelectedBuildingPanel::buildSingle(EntityId id)
     m_buffersLabel->setText(bufText);
 }
 
+void SelectedBuildingPanel::onStateUpdated(Tick /*tick*/, int /*blocks*/, double /*speed*/)
+{
+    if (m_singleId == kInvalidEntityId) { return; }
+    const Building* b = m_sim->buildings().findBuilding(m_singleId);
+    if (!b)
+    {
+        buildEmpty();
+        return;
+    }
+    refreshBuffers(b);
+}
+
 void SelectedBuildingPanel::buildMulti(const std::vector<EntityId>& ids)
 {
     m_singleId = kInvalidEntityId;

src/ui/SelectedBuildingPanel.h

@@ -5,8 +5,10 @@
 
 #include <QWidget>
 
+#include "Building.h"
 #include "EntityId.h"
 #include "GameConfig.h"
+#include "Tick.h"
 
 class Simulation;
 class QLabel;
@@ -24,6 +26,7 @@ public:
 
 public slots:
     void onSelectionChanged(const std::vector<EntityId>& ids);
+    void onStateUpdated(Tick tick, int blocks, double speed);
 
 private slots:
     void onRecipeChanged(int comboIndex);
@@ -35,6 +38,7 @@ private:
     void buildEmpty();
     void buildSingle(EntityId id);
     void buildMulti(const std::vector<EntityId>& ids);
+    void refreshBuffers(const Building* b);
 
     Simulation*        m_sim;
     const GameConfig*  m_config;