Add translation support to CMake

Add some strings for initial german translation

CMakeLists.txt

@@ -362,6 +362,7 @@ find_package(Qt5Core REQUIRED)
 find_package(Qt5Multimedia REQUIRED)
 find_package(Qt5Gui REQUIRED)
 find_package(Qt5Svg REQUIRED)
+find_package(Qt5LinguistTools REQUIRED)
 find_package(ZLIB REQUIRED)
 # liblcf
 option(EDITOR_BUILD_LIBLCF "Instead of detecting liblcf the liblcf repository is cloned into lib/liblcf and built together with the Player. This is convenient for development" OFF)
@@ -440,6 +441,23 @@ set_target_properties(${EXE_NAME} PROPERTIES
 	AUTORCC ON
 )
 
+# Translations
+set(TRANSLATION_SOURCES
+	translations/editor_de.ts
+)
+set(TRANSLATION_RES ${CMAKE_CURRENT_BINARY_DIR}/translations/editor.qrc)
+configure_file(translations/editor.qrc ${TRANSLATION_RES} COPYONLY)
+set_source_files_properties(${TRANSLATION_SOURCES} PROPERTIES
+	OUTPUT_LOCATION "translations")
+qt5_add_translation(EDITOR_TRANSLATIONS ${TRANSLATION_SOURCES}
+	OPTIONS -compress -nounfinished -removeidentical)
+target_sources(${EXE_NAME} PRIVATE ${TRANSLATION_RES} ${EDITOR_TRANSLATIONS})
+add_custom_target(translations
+	COMMAND ${Qt5_LUPDATE_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/src -ts ${TRANSLATION_SOURCES}
+	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+	COMMENT "Create/Update translations..."
+	COMMAND_EXPAND_LISTS VERBATIM)
+
 # Add resources
 target_sources(${EXE_NAME} PRIVATE "resources/Resources.qrc")
 

src/main.cpp

@@ -51,9 +51,9 @@ int main(int argc, char *argv[])
 	QString e = getenv("EASYRPG_EDITOR_LANG_FILE");
 	if (!e.isEmpty())
 		found = t.load(e);
-#else
-	found = t.load(QLocale(), QLatin1String("easyrpg-editor"), QLatin1String("_"), QLatin1String(":/i18n"));
 #endif
+	if (!found)
+		found = t.load(QLocale(), QLatin1String("easyrpg-editor"), QLatin1String("_"), QLatin1String(":/i18n"));
 	if (found)
 		a.installTranslator(&t);
 	else

translations/editor.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/i18n">
+        <file alias="easyrpg-editor_de.qm">editor_de.qm</file>
+    </qresource>
+</RCC>