From 46a8d37c08871d9b5098fbcc684b41c8fe198fba Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Wed, 23 Mar 2016 22:48:09 +0100
Subject: [PATCH] Support for high DPI screens

---
 src/blackgui/guiapplication.cpp | 5 +++++
 src/blackgui/guiapplication.h   | 4 ++++
 src/swiftcore/main.cpp          | 1 +
 src/swiftdata/main.cpp          | 1 +
 src/swiftlauncher/main.cpp      | 1 +
 5 files changed, 12 insertions(+)

diff --git a/src/blackgui/guiapplication.cpp b/src/blackgui/guiapplication.cpp
index 5bb3f756f..74894b6ff 100644
--- a/src/blackgui/guiapplication.cpp
+++ b/src/blackgui/guiapplication.cpp
@@ -152,6 +152,11 @@ namespace BlackGui
         CApplication::exit(retcode);
     }
 
+    void CGuiApplication::highDpiScreenSupport()
+    {
+        qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "1");
+    }
+
     void CGuiApplication::ps_startupCompleted()
     {
         CApplication::ps_startupCompleted();
diff --git a/src/blackgui/guiapplication.h b/src/blackgui/guiapplication.h
index df08d81b3..5821c50db 100644
--- a/src/blackgui/guiapplication.h
+++ b/src/blackgui/guiapplication.h
@@ -136,6 +136,10 @@ namespace BlackGui
         //! Exit application, perform graceful shutdown and exit
         static void exit(int retcode = 0);
 
+        //! Support for high DPI screens
+        //! \note Needs to be at the beginning of main
+        static void highDpiScreenSupport();
+
     signals:
         //! Style sheet changed
         void styleSheetsChanged();
diff --git a/src/swiftcore/main.cpp b/src/swiftcore/main.cpp
index f65aacbc3..c1e2d55b9 100644
--- a/src/swiftcore/main.cpp
+++ b/src/swiftcore/main.cpp
@@ -27,6 +27,7 @@ using namespace BlackGui;
 int main(int argc, char *argv[])
 {
     //! [CSwiftGuiStdApplication]
+    CGuiApplication::highDpiScreenSupport();
     QApplication qa(argc, argv);
     CGuiApplication a("swift core", CIcons::swiftNova24());
     a.addWindowStateOption();
diff --git a/src/swiftdata/main.cpp b/src/swiftdata/main.cpp
index 8dc2bb6ed..1b2bbe6a0 100644
--- a/src/swiftdata/main.cpp
+++ b/src/swiftdata/main.cpp
@@ -27,6 +27,7 @@ using namespace BlackGui;
 
 int main(int argc, char *argv[])
 {
+    CGuiApplication::highDpiScreenSupport();
     QApplication qa(argc, argv);
     Q_UNUSED(qa);
     CGuiApplication a("swift mapping tool", CIcons::swiftDatabase48());
diff --git a/src/swiftlauncher/main.cpp b/src/swiftlauncher/main.cpp
index 166eb50a5..f85893711 100644
--- a/src/swiftlauncher/main.cpp
+++ b/src/swiftlauncher/main.cpp
@@ -28,6 +28,7 @@ using namespace BlackCore;
 int main(int argc, char *argv[])
 {
     //! [CSwiftGuiStdApplication]
+    CGuiApplication::highDpiScreenSupport();
     QApplication qa(argc, argv);
     CGuiApplication a("swift launcher", CIcons::swift1024());
     a.addParserOption({{"i", "installer"}, QCoreApplication::translate("main", "Installer setup."), "installer"});