feat(ui): update text input area on field changes and window resize

include/Cubed/app.hpp

@@ -40,6 +40,8 @@ public:
 
     void start_text_input();
     void stop_text_input();
+    void update_text_input_area(const glm::vec4& textbox,
+                                float cursor_position_x);
 
 private:
     Config m_game_config;

include/Cubed/ui/text_field.hpp

@@ -31,7 +31,7 @@ public:
     bool handle_mouse_button_event(const MouseButtonEvent& e) override;
     bool handle_text_input_event(const TextInputEvent& e) override;
     bool handle_key_event(const KeyEvent& e) override;
-
+    bool handle_window_resize_event(const WindowResizeEvent& e) override;
     const std::string& input_text() const;
 
     template <typename F> TextField& set_on_finish(F&& f) {
@@ -69,5 +69,6 @@ private:
     void on_render(Renderer& renderer) override;
     void on_update(float dt) override;
     void update_show_text();
+    void update_input_area();
 };
 } // namespace Cubed

src/app.cpp

@@ -784,4 +784,15 @@ void App::start_text_input() {
 }
 void App::stop_text_input() { SDL_StopTextInput(m_window.get_window()); }
 
+void App::update_text_input_area(const glm::vec4& textbox,
+                                 float cursor_position_x) {
+
+    SDL_Rect area{static_cast<int>(textbox.x), static_cast<int>(textbox.y),
+                  static_cast<int>(textbox.z), static_cast<int>(textbox.w)};
+
+    int cursor_x = cursor_position_x - textbox.x;
+
+    SDL_SetTextInputArea(m_window.get_window(), &area, cursor_x);
+}
+
 } // namespace Cubed

src/ui/text_field.cpp

@@ -92,10 +92,20 @@ void TextField::update_show_text() {
         m_foreground->set_color(Color::WHITE);
     }
     update_text_scale();
-
+    update_input_area();
     m_cursor->set_offset({13.0f + m_foreground->width(), 0.0f});
 }
 
+void TextField::update_input_area() {
+    if (!m_app) {
+        return;
+    }
+    auto p = pos();
+    glm::vec4 textbox{p.x, p.y, width(), height()};
+    float cursor_position_x = p.x + 13.0f + m_foreground->width();
+    m_app->update_text_input_area(textbox, cursor_position_x);
+}
+
 TextField& TextField::set_scale(float scale) {
     m_scale = scale;
     return *this;
@@ -227,4 +237,11 @@ bool TextField::handle_key_event(const KeyEvent& e) {
 
     return false;
 }
+
+bool TextField::handle_window_resize_event(const WindowResizeEvent& e) {
+    Widget::handle_window_resize_event(e);
+    update_input_area();
+    return false;
+}
+
 } // namespace Cubed