improve 4K images

src/luaengine/main.cpp

@@ -26,6 +26,7 @@
 int main(int argc, char *argv[])
 {
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
+    QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
     QApplication a(argc, argv);
 
 #ifdef Q_OS_WIN

src/luaengineapp/main.cpp

@@ -30,6 +30,7 @@
 int main(int argc, char *argv[])
 {
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
+    QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
     QApplication a(argc, argv);
 #ifdef Q_OS_WIN
 #if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)

src/luaenginegui/luaengine/LuaEngineGui.cpp

@@ -641,6 +641,9 @@ int LuaEngineGui::setWidgetImageSize(lua_State *L_p)
             if (((QObject*)pointer)->inherits("QPushButton")) {
                 ((QPushButton*)pointer)->setIconSize(QSize(getVariant(L_p, 2).toInt(), getVariant(L_p, 3).toInt()));
             }
+            else if (((QObject*)pointer)->inherits("QToolBar")) {
+                ((QToolBar*)pointer)->setIconSize(QSize(getVariant(L_p, 2).toInt(), getVariant(L_p, 3).toInt()));
+            }
             return 0;
         }
     }