replace combined stateUpdated signal with individual events

src/ui/BlueprintPanel.cpp

@@ -13,6 +13,7 @@
 #include <QVBoxLayout>
 
 #include "BlueprintSerializer.h"
+#include "BuildingBlocksChangedEvent.h"
 
 #include "Building.h"
 #include "BuildingSystem.h"
@@ -60,6 +61,13 @@ BlueprintPanel::BlueprintPanel(Simulation* sim, const GameConfig* config, QWidge
 
     connect(m_saveBtn, &QPushButton::clicked, this, &BlueprintPanel::onSaveClicked);
     connect(m_loadBtn, &QPushButton::clicked, this, &BlueprintPanel::onLoadClicked);
+
+    registerForEvent();
+}
+
+BlueprintPanel::~BlueprintPanel()
+{
+    unregisterForEvent();
 }
 
 void BlueprintPanel::onSelectionChanged(const std::vector<BuildingId>& ids)
@@ -68,9 +76,9 @@ void BlueprintPanel::onSelectionChanged(const std::vector<BuildingId>& ids)
     refreshButtonStates();
 }
 
-void BlueprintPanel::onStateUpdated(Tick /*tick*/, int blocks, double /*speed*/)
+void BlueprintPanel::handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event)
 {
-    m_currentBlocks = blocks;
+    m_currentBlocks = event->blocks;
     refreshButtonStates();
 }