Lua: Make Layout-derived classes directly show-able

Change-Id: I2bea8187626c239b5b2e9ddb32d291db97ddc9ac
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/libs/utils/layoutbuilder.cpp

@@ -686,6 +686,11 @@ QWidget *Layout::emerge() const
     return widget;
 }
 
+void Layout::show() const
+{
+    return emerge()->show();
+}
+
 // "Widgets"
 
 Widget::Widget(std::initializer_list<I> ps)

src/libs/utils/layoutbuilder.h

@@ -156,6 +156,7 @@ public:
     void fieldGrowthPolicy(int policy);
 
     QWidget *emerge() const;
+    void show() const;
 
     QFormLayout *asForm();
     QGridLayout *asGrid();

src/plugins/lua/bindings/inheritance.h

@@ -99,7 +99,7 @@ SOL_BASE_CLASSES(Layouting::Row, Layouting::Layout);
 SOL_BASE_CLASSES(Layouting::Flow, Layouting::Layout);
 SOL_BASE_CLASSES(Layouting::Grid, Layouting::Layout);
 SOL_BASE_CLASSES(Layouting::Form, Layouting::Layout);
-SOL_BASE_CLASSES(Layouting::Widget, Layouting::Widget);
+SOL_BASE_CLASSES(Layouting::Widget, Layouting::Object);
 SOL_BASE_CLASSES(Layouting::Stack, Layouting::Widget);
 SOL_BASE_CLASSES(Layouting::Tab, Layouting::Widget);
 SOL_BASE_CLASSES(Layouting::Group, Layouting::Widget);

src/plugins/lua/bindings/layout.cpp

@@ -231,6 +231,15 @@ void addLayoutModule()
             "Stretch", sol::call_constructor, sol::constructors<Stretch(int)>());
 
         // Layouts
+        layout.new_usertype<Layout>(
+            "Layout",
+            sol::call_constructor,
+            sol::factories(&construct<Layout>),
+            "show",
+            &Layout::show,
+            sol::base_classes,
+            sol::bases<Object, Thing>());
+
         layout.new_usertype<Form>(
             "Form",
             sol::call_constructor,