Add layer size, make layers API more flexible

components/lua_ui/layers.cpp

@@ -0,0 +1,29 @@
+#include "layers.hpp"
+
+#include <components/debug/debuglog.hpp>
+
+namespace LuaUi
+{
+    size_t Layer::indexOf(std::string_view name)
+    {
+        for (size_t i = 0; i < count(); i++)
+            if (at(i)->getName() == name)
+                return i;
+        return count();
+    }
+
+    void Layer::insert(size_t index, std::string_view name, Options options)
+    {
+        if (index > count())
+            throw std::logic_error("Invalid layer index");
+        if (indexOf(name) < count())
+            Log(Debug::Error) << "Layer \"" << name << "\" already exists";
+        else
+        {
+            auto layer = MyGUI::LayerManager::getInstance()
+                .createLayerAt(std::string(name), "OverlappedLayer", index);
+            auto overlappedLayer = dynamic_cast<MyGUI::OverlappedLayer*>(layer);
+            overlappedLayer->setPick(options.mInteractive);
+        }
+    }
+}