Optimize parameter passing to avoid unnecessary copying

src/graphics/ui/elements/Button.cpp

@@ -1,12 +1,14 @@
 #include "Button.hpp"
 
+#include <utility>
+
 #include "Label.hpp"
 #include "../../core/DrawContext.hpp"
 #include "../../core/Batch2D.hpp"
 
 using namespace gui;
 
-Button::Button(std::shared_ptr<UINode> content, glm::vec4 padding)
+Button::Button(const std::shared_ptr<UINode>& content, glm::vec4 padding)
     : Panel(glm::vec2(), padding, 0) {
     glm::vec4 margin = getMargin();
     setSize(content->getSize()+
@@ -20,9 +22,9 @@ Button::Button(std::shared_ptr<UINode> content, glm::vec4 padding)
 }
 
 Button::Button(
-    std::wstring text, 
+    const std::wstring& text,
     glm::vec4 padding, 
-    onaction action,
+    const onaction& action,
     glm::vec2 size
 ) : Panel(size, padding, 0) 
 {
@@ -63,7 +65,7 @@ std::wstring Button::getText() const {
 
 Button* Button::textSupplier(wstringsupplier supplier) {
     if (label) {
-        label->textSupplier(supplier);
+        label->textSupplier(std::move(supplier));
     }
     return this;
 }