refactor(ui): move width, height, and fill properties to base Widget

Consolidate width, height, and fill (fill_parent, fill_width, fill_height) into the base Widget class. Replace per-widget set_fill(bool) with set_fill_parent(bool), set_fill_width(bool), and set_fill_height(bool).

include/Cubed/ui/button.hpp

@@ -23,8 +23,8 @@ public:
     float width() const override;
     float height() const override;
 
-    Button& set_width(float width);
-    Button& set_height(float height);
+    Button& set_width(float width) override;
+    Button& set_height(float height) override;
     Button& set_background_image(const std::string& path,
                                  TextureManager& texture_manager);
     Button& set_default_image(TextureManager& texture_manager);
@@ -54,8 +54,6 @@ private:
         "texture/ui/button001.png";
     std::function<void()> m_clicked;
 
-    float m_width = NORMAL_BUTTON_WIDTH;
-    float m_height = NORMAL_BUTTON_HEIGHT;
     float m_scale = DEFAULT_SCALE;
     bool m_auto_scale = false;
     void on_render(Renderer& renderer) override;

include/Cubed/ui/chat_box.hpp

@@ -17,7 +17,6 @@ public:
     ChatBox& set_text_scale(float scale);
     // Only the width of TextField can be set; the height is calculated
     // dynamically
-    ChatBox& set_width(float width);
     ChatBox& set_show_lines(int lines);
     ChatBox& set_spacing(float spacing);
     ChatBox& clear_input();
@@ -42,8 +41,6 @@ private:
     int m_lines = 10;
     bool m_scale = 1.0f;
     float m_spacing = 0.0f;
-    float m_width = 0.0f;
-    float m_height = 0.0f;
     float m_text_scale = 1.0f;
     std::deque<Line> m_messages;
     std::unique_ptr<TextField> m_text_field;

include/Cubed/ui/column_layout.hpp

@@ -26,8 +26,8 @@ public:
 
 private:
     int m_spacing = 0;
-    float m_content_height = 0;
-    float m_content_width = 0;
+    float m_content_height = 0.0f;
+    float m_content_width = 0.0f;
     ColumnLayoutAnchor m_layout_anchor = ColumnLayoutAnchor::CENTER;
 };
 } // namespace Cubed

include/Cubed/ui/image.hpp

@@ -21,17 +21,9 @@ public:
     Image& set_scale(float scale);
     float scale() const;
 
-    Image& set_height(float height);
-    Image& set_width(float width);
-
-    Image& set_fill(bool fill);
-
 private:
     void on_render(Renderer& renderer) override;
     void on_update(float dt) override;
-    float m_width = 0.0f;
-    float m_height = 0.0f;
-    bool m_fill = false;
 
     const Texture* m_texture = nullptr;
     glm::vec2 m_pos{0.0f, 0.0f};

include/Cubed/ui/rect.hpp

@@ -16,11 +16,6 @@ public:
     float height() const override;
     float alpha() const;
 
-    Rect& set_width(float width);
-    Rect& set_height(float height);
-
-    Rect& set_fill(bool fill);
-
     Rect& set_scale(float scale);
     Rect& set_color(Color color);
     Rect& set_alpha(float alpha);
@@ -32,10 +27,7 @@ private:
     void on_render(Renderer& renderer) override;
 
     Color m_color = Color::WHITE;
-    float m_width = 0.0f;
-    float m_height = 0.0f;
     float m_scale = 1.0f;
     float m_alpha = 1.0f;
-    bool m_fill = false;
 };
 } // namespace Cubed

include/Cubed/ui/slider.hpp

@@ -21,8 +21,8 @@ public:
     float height() const override;
 
     Slider& set_scale(float scale);
-    Slider& set_width(float width);
-    Slider& set_height(float h);
+    Slider& set_width(float width) override;
+    Slider& set_height(float h) override;
     Slider& set_slider_text(const std::string& key,
                             const std::string& variable);
     Slider& set_track_image(const std::string& path,
@@ -48,8 +48,7 @@ private:
     std::unique_ptr<Label> m_label;
     ValueType m_type = ValueType::FLOAT;
     float m_scale = DEFAULT_SCALE;
-    float m_width = NORMAL_SLIDER_WIDTH;
-    float m_height = NORMAL_SLIDER_HEIGHT;
+
     float m_xpos = 0.0f;
     bool m_dragging = false;
     bool m_inside = false;

include/Cubed/ui/text_field.hpp

@@ -18,16 +18,14 @@ public:
     float width() const override;
     float height() const override;
 
-    TextField& set_width(float width);
-    TextField& set_height(float height);
+    TextField& set_width(float width) override;
+    TextField& set_height(float height) override;
     TextField& set_show_text(const std::string& text);
     TextField& set_background(std::unique_ptr<Widget> background);
     TextField& set_auto_scale(bool auto_scale);
     TextField& set_app(App* app);
     TextField& set_typing(bool typing, bool finished);
     TextField& clear_input();
-    TextField& set_fill_width(bool fill);
-    TextField& set_fill_height(bool fill);
     bool handle_mouse_move_event(const MouseMoveEvent& e) override;
     bool handle_mouse_button_event(const MouseButtonEvent& e) override;
     bool handle_text_input_event(const TextInputEvent& e) override;

include/Cubed/ui/widget.hpp

@@ -34,8 +34,16 @@ public:
     virtual Widget& set_window_size(int width, int height);
     virtual Widget& set_visible(bool visible);
     // Returns the final display size
+
     virtual float width() const;
     virtual float height() const;
+    virtual Widget& set_width(float width);
+    virtual Widget& set_height(float height);
+
+    virtual Widget& set_fill_parent(bool fill);
+    virtual Widget& set_fill_width(bool fill);
+    virtual Widget& set_fill_height(bool fill);
+
     virtual glm::vec2 pos() const;
 
     virtual bool handle_key_event(const KeyEvent& e);
@@ -44,7 +52,6 @@ public:
     virtual bool handle_window_resize_event(const WindowResizeEvent& e);
     virtual bool handle_mouse_move_event(const MouseMoveEvent& e);
     virtual bool handle_text_input_event(const TextInputEvent& e);
-
     void set_order(TraversalOrder order);
 
     template <typename T, typename... Args> T& add_child(Args&&... args) {
@@ -56,12 +63,16 @@ public:
 
 protected:
     Widget* m_parent = nullptr;
-    float m_window_height = 0;
-    float m_window_width = 0;
+    float m_window_height = 0.0f;
+    float m_window_width = 0.0f;
+    float m_width = 0.0f;
+    float m_height = 0.0f;
     // Center is at the top-left corner, position is at the top-left corner
     Anchor m_anchor = Anchor::TOP_LEFT;
     bool m_visible = true;
-
+    bool m_fill_parent = false;
+    bool m_fill_height = false;
+    bool m_fill_width = false;
     glm::ivec2 m_offset{0, 0};
 
     std::vector<std::unique_ptr<Widget>>& children();

src/ui/button.cpp

@@ -5,13 +5,16 @@
 namespace Cubed {
 Button::Button(Widget* parent) : Widget(parent) {
     m_background = std::make_unique<Image>(this);
-    m_background->set_fill(true);
+    m_background->set_fill_parent(true);
     m_background->set_anchor(Anchor::TOP_LEFT);
     m_foreground = std::make_unique<Label>(this);
     m_foreground->set_anchor(Anchor::CENTER);
+    m_width = NORMAL_BUTTON_WIDTH;
+    m_height = NORMAL_BUTTON_HEIGHT;
 }
 
 void Button::on_update(float dt) {
+    Widget::on_update(dt);
     if (m_background) {
         m_background->update(dt);
     }
@@ -27,6 +30,7 @@ void Button::on_render(Renderer& renderer) {
     if (m_foreground) {
         m_foreground->render(renderer);
     }
+    Widget::on_render(renderer);
 }
 
 bool Button::handle_mouse_move_event(const MouseMoveEvent& e) {
@@ -62,8 +66,20 @@ Button& Button::set_scale(float scale) {
 
 float Button::scale() const { return m_scale; }
 
-float Button::width() const { return m_width * m_scale; }
-float Button::height() const { return m_height * m_scale; }
+float Button::width() const {
+
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+    return m_width * m_scale;
+}
+float Button::height() const {
+
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+    return m_height * m_scale;
+}
 Button& Button::set_width(float width) {
     m_width = width;
     update_text_scale();

src/ui/chat_box.cpp

@@ -38,10 +38,6 @@ ChatBox& ChatBox::set_text_scale(float scale) {
 
     return *this;
 }
-ChatBox& ChatBox::set_width(float width) {
-    m_width = width;
-    return *this;
-}
 ChatBox& ChatBox::set_show_lines(int lines) {
     m_lines = lines;
     return *this;
@@ -56,7 +52,12 @@ ChatBox& ChatBox::clear_input() {
 }
 std::string& ChatBox::get_input_text() { return m_text_field->input_text(); }
 
-float ChatBox::width() const { return m_width * m_scale; }
+float ChatBox::width() const {
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+    return m_width * m_scale;
+}
 float ChatBox::height() const {
     // Height is dynamically calculated, no scaling needed
     return m_height;
@@ -100,8 +101,8 @@ void ChatBox::layout() {
     m_height = m_lines == 0 ? 0 : (y - m_spacing);
 }
 void ChatBox::on_update(float dt) {
+    Widget::on_update(dt);
     layout();
-
     m_text_field->update(dt);
 }
 
@@ -118,6 +119,7 @@ void ChatBox::on_render(Renderer& renderer) {
             it->label->render(renderer);
         }
     }
+    Widget::on_render(renderer);
 }
 bool ChatBox::handle_text_input_event(const TextInputEvent& e) {
     if (m_text_field && m_text_field->handle_text_input_event(e)) {

src/ui/column_layout.cpp

@@ -7,8 +7,8 @@ ColumnLayout::ColumnLayout(Widget* parent) : Widget(parent) {
 ColumnLayout::~ColumnLayout() {}
 
 void ColumnLayout::update(float dt) {
-    layout();
     Widget::update(dt);
+    layout();
 }
 
 float ColumnLayout::width() const { return m_content_width; }

src/ui/credits_ui.cpp

@@ -16,14 +16,15 @@ void CreditsUI::init() {
     auto& renderer = m_scene.scene_manager().app().renderer();
 
     auto image = std::make_unique<Image>(nullptr);
-    image->set_fill(true)
-        .set_image("texture/ui/background.png",
+    image
+        ->set_image("texture/ui/background.png",
                     m_scene.scene_manager().app().texture_manager())
         .set_anchor(Anchor::TOP_LEFT)
-        .set_window_size(renderer.window_width(), renderer.window_height());
+        .set_window_size(renderer.window_width(), renderer.window_height())
+        .set_fill_parent(true);
 
     auto& rect = image->add_child<Rect>();
-    rect.set_fill(true).set_color(Color::BLACK).set_alpha(0.7f);
+    rect.set_color(Color::BLACK).set_alpha(0.7f).set_fill_parent(true);
 
     {
         auto& button = rect.add_child<Button>();

src/ui/error_ui.cpp

@@ -16,10 +16,10 @@ void ErrorUI::init() {
     bi->set_window_size(renderer.window_width(), renderer.window_height());
     bi->set_anchor(Anchor::TOP_LEFT);
     bi->set_image("texture/ui/background.png", texture_manager);
-    bi->set_fill(true);
+    bi->set_fill_parent(true);
 
     auto& rect = bi->add_child<Rect>();
-    rect.set_fill(true);
+    rect.set_fill_parent(true);
     rect.set_alpha(0.7f);
     rect.set_color(Color::BLACK);
 

src/ui/host_game_ui.cpp

@@ -19,10 +19,10 @@ void HostGameUI::init() {
     bi->set_window_size(renderer.window_width(), renderer.window_height());
     bi->set_anchor(Anchor::TOP_LEFT);
     bi->set_image("texture/ui/background.png", texture_manager);
-    bi->set_fill(true);
+    bi->set_fill_parent(true);
 
     auto& rect = bi->add_child<Rect>();
-    rect.set_fill(true);
+    rect.set_fill_parent(true);
     rect.set_alpha(0.7f);
     rect.set_color(Color::BLACK);
 
@@ -50,8 +50,8 @@ void HostGameUI::init() {
         text_seed.set_show_text(tr("hostgame.world_seed"));
         text_seed.set_app(&m_scene.scene_manager().app());
         std::unique_ptr<Image> back = std::make_unique<Image>(&text_seed);
-        back->set_fill(true).set_image(DEFAULT_TEXT_FIELD_IMAGE,
-                                       texture_manager);
+        back->set_image(DEFAULT_TEXT_FIELD_IMAGE, texture_manager)
+            .set_fill_parent(true);
         text_seed.set_background(std::move(back));
         text_seed.set_on_finish([this, &text_seed]() {
             unsigned seed = 0;
@@ -72,8 +72,8 @@ void HostGameUI::init() {
     {
         auto& text_port = layout.add_child<TextField>();
         std::unique_ptr<Image> back = std::make_unique<Image>(&text_port);
-        back->set_fill(true).set_image(DEFAULT_TEXT_FIELD_IMAGE,
-                                       texture_manager);
+        back->set_image(DEFAULT_TEXT_FIELD_IMAGE, texture_manager)
+            .set_fill_parent(true);
         text_port.set_background(std::move(back));
         text_port.set_show_text(tr("hostgame.port"));
         text_port.set_app(&m_scene.scene_manager().app());

src/ui/image.cpp

@@ -6,20 +6,11 @@
 namespace Cubed {
 Image::Image(Widget* parent) : Widget(parent) {}
 
-void Image::on_render(Renderer& renderer) { renderer.render_image(*this); }
-void Image::on_update(float) {
-    if (m_fill) {
-        if (m_fill) {
-            if (!m_parent) {
-                m_width = m_window_width;
-                m_height = m_window_height;
-            } else {
-                m_width = m_parent->width();
-                m_height = m_parent->height();
-            }
-        }
-    }
+void Image::on_render(Renderer& renderer) {
+    renderer.render_image(*this);
+    Widget::on_render(renderer);
 }
+void Image::on_update(float dt) { Widget::on_update(dt); }
 Image& Image::set_image(const std::string& path,
                         TextureManager& texture_manager) {
     m_texture = texture_manager.get_image_texture(path);
@@ -37,6 +28,9 @@ float Image::height() const {
         Logger::error("Image not set image!");
         return 0.0f;
     }
+    if (m_fill_height || m_fill_parent) {
+        return m_height;
+    }
     return m_height * m_scale;
 }
 
@@ -45,23 +39,12 @@ float Image::width() const {
         Logger::error("Image not set image!");
         return 0.0f;
     }
+    if (m_fill_parent || m_fill_width) {
+        return m_width;
+    }
     return m_width * m_scale;
 }
 
-Image& Image::set_height(float height) {
-    m_height = height;
-    return *this;
-}
-Image& Image ::set_width(float width) {
-    m_width = width;
-    return *this;
-}
-
-Image& Image::set_fill(bool fill) {
-    m_fill = fill;
-    return *this;
-}
-
 const Texture* Image::texture() const { return m_texture; }
 
 } // namespace Cubed

src/ui/join_game_ui.cpp

@@ -17,10 +17,10 @@ void JoinGameUI::init() {
     bi->set_window_size(renderer.window_width(), renderer.window_height());
     bi->set_anchor(Anchor::TOP_LEFT);
     bi->set_image("texture/ui/background.png", texture_manager);
-    bi->set_fill(true);
+    bi->set_fill_parent(true);
 
     auto& rect = bi->add_child<Rect>();
-    rect.set_fill(true);
+    rect.set_fill_parent(true);
     rect.set_alpha(0.7f);
     rect.set_color(Color::BLACK);
 
@@ -47,8 +47,8 @@ void JoinGameUI::init() {
         auto& text_ip = layout.add_child<TextField>();
         text_ip.set_show_text(tr("joingame.server_ip"));
         std::unique_ptr<Image> back = std::make_unique<Image>(&text_ip);
-        back->set_fill(true).set_image(DEFAULT_TEXT_FIELD_IMAGE,
-                                       texture_manager);
+        back->set_image(DEFAULT_TEXT_FIELD_IMAGE, texture_manager)
+            .set_fill_parent(true);
         text_ip.set_background(std::move(back));
         text_ip.set_app(&m_scene.scene_manager().app());
         text_ip.set_on_finish([this, &text_ip]() {

src/ui/label.cpp

@@ -24,7 +24,7 @@ Label& Label::enable_background() {
         return *this;
     }
     m_background = std::make_unique<Rect>(this);
-    m_background->set_fill(true);
+    m_background->set_fill_parent(true);
     m_background->set_anchor(Anchor::TOP_LEFT);
     return *this;
 }
@@ -38,6 +38,7 @@ Label& Label::set_background_alpha(float alpha) {
 }
 
 void Label::on_update(float dt) {
+    Widget::on_update(dt);
     if (m_background) {
         m_background->update(dt);
     }
@@ -49,6 +50,7 @@ void Label::on_render(Renderer& renderer) {
         m_background->render(renderer);
     }
     renderer.render_lable(*this);
+    Widget::on_render(renderer);
 }
 
 void Label::update_vertices() {
@@ -57,8 +59,8 @@ void Label::update_vertices() {
 
     m_offset_x = textmesh.min_x;
     m_offset_y = textmesh.min_y;
-    m_real_width = textmesh.width;
-    m_real_height = textmesh.height;
+    m_width = m_real_width = textmesh.width;
+    m_height = m_real_height = textmesh.height;
 
     m_data.update_sum();
     m_data.upload();
@@ -66,8 +68,21 @@ void Label::update_vertices() {
 
 const UIVertexData& Label::data() const { return m_data; }
 const TextStyle& Label::text_style() const { return m_text; }
-float Label::width() const { return m_real_width * m_scale; }
-float Label::height() const { return m_real_height * m_scale; }
+float Label::width() const {
+
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+
+    return m_width * m_scale;
+}
+float Label::height() const {
+
+    if (m_fill_height || m_fill_parent) {
+        return m_height;
+    }
+    return m_height * m_scale;
+}
 float Label::real_width() const { return m_real_width; }
 float Label::real_height() const { return m_real_height; }
 float Label::offset_x() const { return m_offset_x; }

src/ui/main_menu_ui_manager.cpp

@@ -18,7 +18,7 @@ void MainMenuUIManager::init() {
 
     auto image = std::make_unique<Image>(nullptr);
     auto& texture_manager = m_scene.scene_manager().app().texture_manager();
-    image->set_fill(true);
+    image->set_fill_parent(true);
     image->set_anchor(Anchor::TOP_LEFT);
     image->set_image("texture/ui/background.png", texture_manager);
     auto& renderer = m_scene.scene_manager().app().renderer();

src/ui/pause_menu_ui_manager.cpp

@@ -12,7 +12,7 @@ PauseMenuUIManager::PauseMenuUIManager(WorldScene& scene) : m_scene(scene) {}
 void PauseMenuUIManager::init() {
     auto rect = std::make_unique<Rect>(nullptr);
 
-    rect->set_fill(true);
+    rect->set_fill_parent(true);
     rect->set_color(Color::BLACK);
     rect->set_alpha(0.5f);
     rect->set_anchor(Anchor::TOP_LEFT);

src/ui/rect.cpp

@@ -12,35 +12,27 @@ Rect::Rect(Widget* parent)
 
 Rect::~Rect() {}
 
-void Rect::on_update(float) {
-    if (m_fill) {
-        if (!m_parent) {
-            m_width = m_window_width;
-            m_height = m_window_height;
-        } else {
-            m_width = m_parent->width();
-            m_height = m_parent->height();
-        }
-    }
+void Rect::on_update(float dt) { Widget::on_update(dt); }
+void Rect::on_render(Renderer& renderer) {
+    renderer.render_rect(*this);
+    Widget::on_render(renderer);
 }
-void Rect::on_render(Renderer& renderer) { renderer.render_rect(*this); }
 
-float Rect::width() const { return m_width * m_scale; }
-float Rect::height() const { return m_height * m_scale; }
+float Rect::width() const {
+
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+    return m_width * m_scale;
+}
+float Rect::height() const {
+
+    if (m_fill_height || m_fill_parent) {
+        return m_height;
+    }
+    return m_height * m_scale;
+}
 float Rect::alpha() const { return m_alpha; }
-Rect& Rect::set_width(float width) {
-    m_width = width;
-    return *this;
-}
-Rect& Rect::set_height(float height) {
-    m_height = height;
-    return *this;
-}
-
-Rect& Rect::set_fill(bool fill) {
-    m_fill = fill;
-    return *this;
-}
 
 Rect& Rect::set_scale(float scale) {
     m_scale = scale;

src/ui/settings_ui.cpp

@@ -21,10 +21,10 @@ void SettingsUI::init() {
     bi->set_window_size(renderer.window_width(), renderer.window_height());
     bi->set_anchor(Anchor::TOP_LEFT);
     bi->set_image("texture/ui/background.png", texture_manager);
-    bi->set_fill(true);
+    bi->set_fill_parent(true);
 
     auto& rect = bi->add_child<Rect>();
-    rect.set_fill(true);
+    rect.set_fill_parent(true);
     rect.set_alpha(0.7f);
     rect.set_color(Color::BLACK);
 

src/ui/slider.cpp

@@ -13,6 +13,8 @@ Slider::Slider(Widget* parent) : Widget(parent) {
 
     m_label = std::make_unique<Label>(this);
     m_label->set_anchor(Anchor::CENTER);
+    m_width = NORMAL_SLIDER_WIDTH;
+    m_height = NORMAL_SLIDER_HEIGHT;
     update_text_scale();
 }
 
@@ -37,7 +39,7 @@ Slider& Slider::set_slider(int* value, const int& min, const int& max) {
 void Slider::init_track() {
     m_track = std::make_unique<Image>(this);
 
-    m_track->set_fill(true);
+    m_track->set_fill_parent(true);
 
     m_track->set_anchor(Anchor::TOP_LEFT);
 }
@@ -54,8 +56,20 @@ void Slider::init_thumb() {
     m_thumb->set_scale(m_scale);
 }
 
-float Slider::width() const { return m_width * m_scale; }
-float Slider::height() const { return m_height * m_scale; }
+float Slider::width() const {
+
+    if (m_fill_width || m_fill_parent) {
+        return m_width;
+    }
+    return m_width * m_scale;
+}
+float Slider::height() const {
+
+    if (m_fill_height || m_fill_parent) {
+        return m_height;
+    }
+    return m_height * m_scale;
+}
 
 Slider& Slider::set_scale(float scale) {
     m_scale = scale;
@@ -160,6 +174,7 @@ void Slider::update_value(float mouse_x) {
 }
 
 void Slider::on_update(float dt) {
+    Widget::on_update(dt);
     if (!m_thumb || !m_track) {
         Logger::error("Please Set value and thumb and track");
         ASSERT(false);
@@ -216,6 +231,7 @@ void Slider::on_render(Renderer& renderer) {
     if (m_label) {
         m_label->render(renderer);
     }
+    Widget::on_render(renderer);
 }
 
 void Slider::update_text_scale() {

src/ui/text_field.cpp

@@ -58,12 +58,7 @@ void TextField::on_render(Renderer& renderer) {
 }
 void TextField::on_update(float dt) {
 
-    if (m_fill_height) {
-        m_height = m_parent ? m_parent->height() : m_window_height;
-    }
-    if (m_fill_width) {
-        m_width = m_parent ? m_parent->width() : m_window_width;
-    }
+    Widget::on_update(dt);
 
     m_cursor_timer += dt;
     if (m_cursor_timer >= CURSOR_INTERVAL) {
@@ -176,15 +171,6 @@ TextField& TextField::clear_input() {
     return *this;
 }
 
-TextField& TextField::set_fill_width(bool fill) {
-    m_fill_width = fill;
-    return *this;
-}
-TextField& TextField::set_fill_height(bool fill) {
-    m_fill_height = fill;
-    return *this;
-}
-
 void TextField::start_typing() {
     if (m_app) {
         m_app->start_text_input();

src/ui/widget.cpp

@@ -3,7 +3,12 @@
 #include "Cubed/tools/log.hpp"
 
 namespace Cubed {
-Widget::Widget(Widget* parent) : m_parent(parent) {}
+Widget::Widget(Widget* parent) : m_parent(parent) {
+    if (!m_parent) {
+        // The root node of the window automatically fills the entire window.
+        set_fill_parent(true);
+    }
+}
 void Widget::update(float dt) {
     on_update(dt);
 
@@ -23,7 +28,18 @@ void Widget::render(Renderer& renderer) {
     }
 }
 
-void Widget::on_update(float) {}
+void Widget::on_update(float) {
+    if (m_fill_width) {
+        m_width = m_parent ? m_parent->width() : m_window_width;
+    }
+    if (m_fill_height) {
+        m_height = m_parent ? m_parent->height() : m_window_height;
+    }
+    if (m_fill_parent) {
+        m_width = m_parent ? m_parent->width() : m_window_width;
+        m_height = m_parent ? m_parent->height() : m_window_height;
+    }
+}
 void Widget::on_render(Renderer&) {}
 
 std::vector<std::unique_ptr<Widget>>& Widget::children() { return m_children; }
@@ -111,17 +127,29 @@ Widget& Widget::set_visible(bool visible) {
     return *this;
 }
 
-float Widget::width() const {
-    if (m_parent) {
-        return m_parent->width();
-    }
-    return m_window_width;
+float Widget::width() const { return m_width; }
+float Widget::height() const { return m_height; }
+
+Widget& Widget::set_width(float width) {
+    m_width = width;
+    return *this;
 }
-float Widget::height() const {
-    if (m_parent) {
-        return m_parent->height();
-    }
-    return m_window_height;
+Widget& Widget::set_height(float height) {
+    m_height = height;
+    return *this;
+}
+
+Widget& Widget::set_fill_parent(bool fill) {
+    m_fill_parent = fill;
+    return *this;
+}
+Widget& Widget::set_fill_width(bool fill) {
+    m_fill_width = fill;
+    return *this;
+}
+Widget& Widget::set_fill_height(bool fill) {
+    m_fill_height = fill;
+    return *this;
 }
 
 glm::vec2 Widget::pos() const { return compute_position(); }

src/ui/world_ui_manager.cpp

@@ -15,6 +15,7 @@ WorldUIManager::~WorldUIManager() {}
 void WorldUIManager::init() {
 
     m_root_widget = std::make_unique<Widget>(nullptr);
+    m_root_widget->set_fill_parent(true);
     auto& renderer = m_scene.scene_manager().app().renderer();
 
     m_root_widget->set_window_size(renderer.window_width(),
@@ -34,7 +35,7 @@ void WorldUIManager::init() {
     auto text_field = std::make_unique<TextField>(&chat_box);
     text_field->set_anchor(Anchor::BOTTOM_LEFT);
     auto rect = std::make_unique<Rect>(text_field.get());
-    rect->set_color(Color::GRAY).set_alpha(0.6f).set_fill(true);
+    rect->set_color(Color::GRAY).set_alpha(0.6f).set_fill_parent(true);
     text_field->set_background(std::move(rect))
         .set_app(&m_scene.scene_manager().app())
         .set_fill_width(true)