Add settings icon, close window when pressing the close button

src/gui/CustomRendererWidget.cpp

@@ -0,0 +1,41 @@
+#include "../../include/gui/CustomRendererWidget.hpp"
+
+#include <mglpp/window/Window.hpp>
+
+namespace gsr {
+    CustomRendererWidget::CustomRendererWidget(mgl::vec2f size) : size(size) {}
+    
+    bool CustomRendererWidget::on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f offset) {
+        if(!visible || !event_handler)
+            return true;
+        return event_handler(event, window, position + offset, size);
+    }
+
+    void CustomRendererWidget::draw(mgl::Window &window, mgl::vec2f offset) {
+        if(!visible)
+            return;
+
+        const mgl::vec2f draw_pos = position + offset;
+
+        mgl_scissor prev_scissor;
+        mgl_window_get_scissor(window.internal_window(), &prev_scissor);
+
+        mgl_scissor new_scissor = {
+            mgl_vec2i{(int)draw_pos.x, (int)draw_pos.y},
+            mgl_vec2i{(int)size.x, (int)size.y}
+        };
+        mgl_window_set_scissor(window.internal_window(), &new_scissor);
+
+        if(draw_handler)
+            draw_handler(window, draw_pos, size);
+
+        mgl_window_set_scissor(window.internal_window(), &prev_scissor);
+    }
+
+    mgl::vec2f CustomRendererWidget::get_size() {
+        if(!visible)
+            return {0.0f, 0.0f};
+
+        return size;
+    }
+}