Qt: ImGui support

src/duckstation-qt/qtdisplaywindow.h

@@ -2,6 +2,7 @@
 #include <QtGui/QWindow>
 
 class QKeyEvent;
+class QResizeEvent;
 
 class HostDisplay;
 
@@ -23,14 +24,21 @@ public:
 
   virtual void Render();
 
+  // this comes back on the emu thread
+  virtual void onWindowResized(int width, int height);
+
+Q_SIGNALS:
+  void windowResizedEvent(int width, int height);
+
 protected:
   virtual bool createImGuiContext();
   virtual void destroyImGuiContext();
   virtual bool createDeviceResources();
   virtual void destroyDeviceResources();
 
-  void keyPressEvent(QKeyEvent* event) override;
-  void keyReleaseEvent(QKeyEvent* event) override;
+  virtual void keyPressEvent(QKeyEvent* event) override;
+  virtual void keyReleaseEvent(QKeyEvent* event) override;
+  virtual void resizeEvent(QResizeEvent* event) override;
 
   QtHostInterface* m_host_interface;
 };