switch to using own event system

src/ui/BlueprintPanel.h

@@ -5,10 +5,12 @@
 #include <QWidget>
 
 #include "Blueprint.h"
+#include "BlueprintModeExitedEvent.h"
 #include "BuildingBlocksChangedEvent.h"
 #include "BuildingId.h"
 #include "EventHandler.h"
 #include "GameConfig.h"
+#include "SelectionChangedEvent.h"
 #include "Tick.h"
 
 class Simulation;
@@ -17,7 +19,9 @@ class QScrollArea;
 class QVBoxLayout;
 
 class BlueprintPanel : public QWidget,
-                       public EventHandler<BuildingBlocksChangedEvent>
+                       public CombinedEventHandler<BuildingBlocksChangedEvent,
+                                                   SelectionChangedEvent,
+                                                   BlueprintModeExitedEvent>
 {
     Q_OBJECT
 
@@ -25,16 +29,10 @@ public:
     BlueprintPanel(Simulation* sim, const GameConfig* config, QWidget* parent = nullptr);
     ~BlueprintPanel() override;
 
-public slots:
-    void onSelectionChanged(const std::vector<BuildingId>& ids);
-    void clearActiveBlueprintButton();
-
-signals:
-    void blueprintPlacementRequested(Blueprint blueprint);
-    void exitBlueprintModeRequested();
-
 private:
     void handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event) override;
+    void handleEvent(std::shared_ptr<const SelectionChangedEvent> event) override;
+    void handleEvent(std::shared_ptr<const BlueprintModeExitedEvent> event) override;
 
 private slots:
     void onCreateClicked();
@@ -44,6 +42,8 @@ private slots:
     void onLoadClicked();
 
 private:
+    void onSelectionChanged(const std::vector<BuildingId>& ids);
+    void clearActiveBlueprintButton();
     Blueprint createBlueprintFromSelection() const;
     int       computeBlueprintCost(const Blueprint& bp) const;
     void      rebuildButtons();