Enable hide according to http://doc.qt.io/qt-5/highdpi.html (#4110)

* Enable hide according to http://doc.qt.io/qt-5/highdpi.html

* Also enable Retina support for OS X

companion/src/CMakeLists.txt

@@ -368,6 +368,10 @@ IF(APPLE)
   set(APPS "\${CMAKE_INSTALL_PREFIX}/${COMPANION_NAME}.app")
   set_target_properties(${COMPANION_NAME} PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Companion ${VERSION_MAJOR}.${VERSION_MINOR}")
   set_target_properties(${SIMULATOR_NAME} PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Simulator ${VERSION_MAJOR}.${VERSION_MINOR}")
+
+  # Use a non standard Info.plist that adds Retina support flags
+  set_target_properties(${COMPANION_NAME} PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${PROJECT_SOURCE_DIR}/companion/targets/mac/MacOSXBundleInfo.plist.in)
+  set_target_properties(${SIMULATOR_NAME} PROPERTIES MACOSX_BUNDLE_INFO_PLIST ${PROJECT_SOURCE_DIR}/companion/targets/mac/MacOSXBundleInfo.plist.in)
 ENDIF(APPLE)
 IF(WIN32)
   set(APPS "\${CMAKE_INSTALL_PREFIX}/bin/QtTest.exe")
@@ -413,6 +417,7 @@ if(APPLE)
   set(${COMPANION_SOURCES} ${COMPANION_SOURCES} ${PROJECT_SOURCE_DIR}/images/${MACOSX_BUNDLE_ICON_FILE})
   install(FILES ${MAC_ICON_FILE} DESTINATION ${companion_res_dir} COMPONENT Runtime)
 
+
   # Copy dfu-util, resolve symlink first
   get_filename_component(DFU_UTIL_ABSOLUTE_PATH ${DFU_UTIL_PATH} REALPATH)
   install(FILES ${DFU_UTIL_ABSOLUTE_PATH} DESTINATION ${companion_res_dir} COMPONENT Runtime)

companion/src/companion.cpp

@@ -62,6 +62,10 @@ int main(int argc, char *argv[])
 {
   Q_INIT_RESOURCE(companion);
 
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+  QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+
   QApplication app(argc, argv);
   app.setApplicationName("OpenTX Companion");
   app.setOrganizationName("OpenTX");

companion/src/simulator.cpp

@@ -70,6 +70,9 @@ void showMessage(const QString & message, enum QMessageBox::Icon icon = QMessage
 int main(int argc, char *argv[])
 {
   Q_INIT_RESOURCE(companion);
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
+  QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
 
   QApplication app(argc, argv);
   app.setApplicationName("OpenTX Simulator");

companion/targets/mac/MacOSXBundleInfo.plist.in

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>${MACOSX_BUNDLE_EXECUTABLE_NAME}</string>
+	<key>CFBundleGetInfoString</key>
+	<string>${MACOSX_BUNDLE_INFO_STRING}</string>
+	<key>CFBundleIconFile</key>
+	<string>${MACOSX_BUNDLE_ICON_FILE}</string>
+	<key>CFBundleIdentifier</key>
+	<string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleLongVersionString</key>
+	<string>${MACOSX_BUNDLE_LONG_VERSION_STRING}</string>
+	<key>CFBundleName</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>${MACOSX_BUNDLE_SHORT_VERSION_STRING}</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
+	<key>CSResourcesFileMapped</key>
+	<true/>
+	<key>NSHumanReadableCopyright</key>
+	<string>${MACOSX_BUNDLE_COPYRIGHT}</string>
+
+    <!-- added since cmake/qt do not add these by default -->
+    <key>NSPrincipalClass</key>
+    <string>NSApplication</string>
+    <key>NSHighResolutionCapable</key>
+    <string>True</string>
+</dict>
+</plist>