convenience function for adding layouts to a widget

src/DocumentLayout.hpp

@@ -11,6 +11,10 @@ public:
     DocumentLayout()
         : Layout() {}
 
+    DocumentLayout(double margin)
+        : Layout()
+        , m_margin(margin) {}
+
     void run();
 
     double get_margin() { return m_margin; }

src/Widget.cpp

@@ -1,5 +1,6 @@
 #include <algorithm>
 #include <iostream>
+#include <memory>
 #include "Widget.hpp"
 #include "Events.hpp"
 #include "Window.hpp"
@@ -14,7 +15,7 @@ void Widget::do_layout() {
     }
 }
 
-void Widget::set_layout(Layout *layout) {
+void Widget::set_layout(std::shared_ptr<Layout> layout) {
     m_layout = layout;
     m_layout->bind_to(this);
 }

src/Widget.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <memory>
+#include <utility>
 #include <vector>
 #include <string>
 #include "Box.hpp" 
@@ -36,8 +37,8 @@ private:
     std::vector<Widget*> m_children;
     Widget *m_parent { nullptr };
     Window *m_window { nullptr };
-    std::shared_ptr<TopLevelStyles> m_styles = nullptr;
-    Layout *m_layout { nullptr };
+    std::shared_ptr<TopLevelStyles> m_styles { nullptr };
+    std::shared_ptr<Layout> m_layout { nullptr };
     bool m_did_init { false };
     bool m_is_focused { false };
     bool m_is_active { false };
@@ -84,8 +85,8 @@ public:
     bool get_accepts_events() { return m_accepts_events; }
     void set_accepts_events(bool accepts_events) { m_accepts_events = accepts_events; }
 
-    void set_layout(Layout *layout);
-    Layout *get_layout() { return m_layout; }
+    void set_layout(std::shared_ptr<Layout> layout);
+    std::shared_ptr<Layout> get_layout() { return m_layout; }
 
     WidgetType get_type() { return m_type; }
     ControlWidgetType get_control_type() { return m_control_type; }
@@ -94,6 +95,13 @@ public:
     void wants_repaint();
     void wants_relayout();
 
+    template<typename T, class... Args>
+    std::shared_ptr<T> set_layout(Args&&... args) {
+        std::shared_ptr<T> layout = std::make_shared<T>(std::forward<T>(args)...);
+        set_layout(layout);
+        return layout;
+    }
+
     virtual ~Widget() {};
 protected:
     WidgetType m_type { WidgetType::Widget };

src/main.cpp

@@ -8,7 +8,6 @@
 #include "src/DocumentLayout.hpp"
 
 int main() {
-    Raven::DocumentLayout main_layout {};
     Raven::Widget new_row { Raven::ControlWidgetType::NewRow };
     Raven::Window window {};
 
@@ -19,16 +18,14 @@ int main() {
 
     int number = 0;
 
-
     window.spawn_window();
 
     add_button.set_current_geometry(Raven::Box(0, 0, 100, 30));
     subtract_button.set_current_geometry(Raven::Box(0, 0, 100, 30));
     label.set_current_geometry(Raven::Box(0, 0, 100, 20));
 
-    main_layout.set_margin(6.0);
+    main_widget.set_layout<Raven::DocumentLayout>(6.0);
 
-    main_widget.set_layout(&main_layout);
     window.set_main_widget(&main_widget);
 
     add_button.on_click = [&]() {