From f3e0a852d5c10b08995d76e07b151d595a366c3d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Fri, 2 Aug 2019 13:23:03 +0200
Subject: [PATCH] Platform: make Screen::{focus,blur}Event() optional to
 implement.

---
 src/Magnum/Platform/Screen.h                | 4 ++--
 src/Magnum/Platform/ScreenedApplication.hpp | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Magnum/Platform/Screen.h b/src/Magnum/Platform/Screen.h
index 6d8ccd1b3..9f993c866 100644
--- a/src/Magnum/Platform/Screen.h
+++ b/src/Magnum/Platform/Screen.h
@@ -283,7 +283,7 @@ template<class Application> class BasicScreen:
          * Called when screen is focused using @ref BasicScreenedApplication::focusScreen()
          * or @ref BasicScreenedApplication::addScreen().
          */
-        virtual void focusEvent() = 0;
+        virtual void focusEvent();
 
         /**
          * @brief Blur event
@@ -292,7 +292,7 @@ template<class Application> class BasicScreen:
          * @ref BasicScreenedApplication::addScreen() or before the screen is
          * removed from application using @ref BasicScreenedApplication::removeScreen().
          */
-        virtual void blurEvent() = 0;
+        virtual void blurEvent();
 
         /**
          * @brief Viewport event
diff --git a/src/Magnum/Platform/ScreenedApplication.hpp b/src/Magnum/Platform/ScreenedApplication.hpp
index 079b4f3ad..9a2263346 100644
--- a/src/Magnum/Platform/ScreenedApplication.hpp
+++ b/src/Magnum/Platform/ScreenedApplication.hpp
@@ -108,6 +108,9 @@ true>::textEditingEvent(TextEditingEvent&) {}
 template<class Application> BasicScreen<Application>::BasicScreen() = default;
 template<class Application> BasicScreen<Application>::~BasicScreen() = default;
 
+template<class Application> void BasicScreen<Application>::focusEvent() {}
+template<class Application> void BasicScreen<Application>::blurEvent() {}
+
 template<class Application> void BasicScreen<Application>::viewportEvent(ViewportEvent& event) {
     #ifdef MAGNUM_BUILD_DEPRECATED
     CORRADE_IGNORE_DEPRECATED_PUSH