Meter is improved but needs a few more things.

demos/meters.cpp

@@ -0,0 +1,100 @@
+#include "guecs/sfml/backend.hpp"
+#include "guecs/sfml/components.hpp"
+#include "guecs/uistack.hpp"
+#include "guecs/ui.hpp"
+#include <iostream>
+#include <chrono>
+#include <thread>
+#include <flat_map>
+#include <fmt/core.h>
+
+using namespace std::chrono_literals;
+
+struct TestMeters {
+  guecs::UI $gui{};
+
+  void init() {
+    $gui.position(0, 0, 1280, 720);
+    $gui.layout("[meter1][=meter2][meter3][meter4]");
+
+    for(auto& [name, cell] : $gui.cells()) {
+      auto gui_id = $gui.entity(name);
+
+      $gui.set<guecs::Rectangle>(gui_id, {4, {0, 255, 0, 255}});
+      $gui.set<guecs::Meter>(gui_id, {1.0f, {255, 0, 0, 255}, 4});
+      $gui.set<guecs::Effect>(gui_id, {});
+      $gui.set<guecs::Text>(gui_id, {guecs::to_wstring(name)});
+      $gui.set<guecs::Clickable>(gui_id, {
+          [&, gui_id, name](auto) {
+            auto& meter = $gui.get<guecs::Meter>(gui_id);
+            meter.percent = meter.percent - 0.1f;
+            if(meter.percent < 0.0f) {
+              meter.percent = 1.0f;
+            }
+          }
+      });
+    }
+
+    $gui.init();
+  }
+
+  void render(sf::RenderTarget& target) {
+    $gui.render(target);
+  }
+
+  bool mouse(float x, float y, guecs::Modifiers mods) {
+    return $gui.mouse(x, y, mods);
+  }
+
+  void update() {
+  }
+};
+
+int main() {
+  try {
+    sfml::Backend backend;
+    guecs::init(&backend);
+
+    sf::RenderWindow window(sf::VideoMode({1280, 720}), "Meter Tester");
+    window.setVerticalSyncEnabled(true);
+    window.setFramerateLimit(60);
+    window.setPosition({0,0});
+    TestMeters gui;
+    gui.init();
+
+    while(window.isOpen()) {
+      while (const auto event = window.pollEvent()) {
+        if(event->is<sf::Event::Closed>()) {
+          window.close();
+        }
+
+        if(const auto* mouse = event->getIf<sf::Event::MouseButtonPressed>()) {
+          if(mouse->button == sf::Mouse::Button::Left) {
+            sf::Vector2f pos = window.mapPixelToCoords(mouse->position);
+            gui.mouse(pos.x, pos.y, false);
+          }
+        } else if(const auto* key = event->getIf<sf::Event::KeyPressed>()) {
+          using KEY = sf::Keyboard::Scan;
+
+          switch(key->scancode) {
+            case KEY::Q:
+              return 0;
+            default:
+              break;
+          }
+        }
+      }
+
+      gui.update();
+      gui.render(window);
+      window.display();
+
+      std::this_thread::sleep_for(100ms);
+    }
+  } catch(const std::system_error& e) {
+    std::cout << "WARNING: On OSX you'll get this error on shutdown.\n";
+    std::cout << "Caught system_error with code "
+                 "[" << e.code() << "] meaning "
+                 "[" << e.what() << "]\n";
+  }
+}

include/guecs/sfml/components.hpp

@@ -69,11 +69,16 @@ namespace guecs {
   struct Meter {
     float percent = 1.0f;
     sf::Color color = THEME.BG_COLOR_DARK;
-    Rectangle bar;
+    int padding = THEME.PADDING;
+    Rectangle bar{padding, color};
+    // this is set automatically if a Rectangle is configured for the cell
+    Rectangle backing_rect{padding, color};
+    size_t $cell_w = 0;
+    size_t $cell_h = 0;
 
+    void init(lel::Cell& cell, guecs::Rectangle &bg);
     void init(lel::Cell& cell);
-    void init(lel::Cell& cell, Rectangle& bg);
-    void render(lel::Cell& cell, sf::RenderTarget& window, sf::Shader *shader_ptr);
+    void render(sf::RenderTarget& window, sf::Shader *shader_ptr);
   };
 
   struct Effect {

meson.build

@@ -11,8 +11,12 @@ project('lel-guecs', 'cpp',
 
 # use this for common options only for our executables
 cpp_args=[
-  '-Wno-deprecated-declarations',
   '-I../subprojects/utf8cpp-4.0.9/source',
+  '-Wno-unused-parameter',
+  '-Wno-unused-function',
+  '-Wno-unused-variable',
+  '-Wno-unused-but-set-variable',
+  '-Wno-deprecated-declarations',
   ]
 link_args=[]
 # these are passed as override_defaults
@@ -156,3 +160,13 @@ executable('multiscreen', [
   include_directories: lel_guecs_inc,
   link_with: [lel_guecs_lib, lel_guecs_sfml_lib],
   dependencies: dependencies)
+
+executable('meters', [
+  'demos/meters.cpp',
+  ],
+  cpp_args: cpp_args,
+  link_args: link_args,
+  override_options: exe_defaults,
+  include_directories: lel_guecs_inc,
+  link_with: [lel_guecs_lib, lel_guecs_sfml_lib],
+  dependencies: dependencies)

src/guecs/sfml/components.cpp

@@ -8,8 +8,7 @@ namespace guecs {
   using std::make_shared;
 
   // BUG: this seems to center things wrong in lel layouts
-  template<typename T>
-    void sfml_center_helper(T& obj, lel::Cell& cell, int padding) {
+  void sfml_center_helper(auto& obj, lel::Cell& cell, int padding) {
     sf::Vector2f position{float(cell.x + padding), float(cell.y + padding)};
 
     if(cell.center) {
@@ -109,19 +108,20 @@ namespace guecs {
   }
 
   void Meter::init(lel::Cell& cell, Rectangle& bg) {
-    bg.shape->setFillColor(color);
+    backing_rect = bg;
     init(cell);
   }
 
   void Meter::init(lel::Cell& cell) {
+    $cell_w = cell.w;
+    $cell_h = cell.h;
     bar.init(cell);
   }
 
-  void Meter::render(lel::Cell& cell, sf::RenderTarget& window, sf::Shader *shader_ptr) {
-    float level = std::clamp(percent, 0.0f, 1.0f) * float(cell.w);
-    // ZED: this 6 is a border width, make it a thing
-    bar.shape->setSize({std::max(level, 0.0f), float(cell.h - 6)});
-    window.draw(*bar.shape, shader_ptr);
+  void Meter::render(sf::RenderTarget& window, sf::Shader *shader_ptr) {
+    float level = std::clamp(percent, 0.0f, 1.0f) * float($cell_w);
+    bar.shape->setSize({std::max(level, 0.0f) - padding * 2, float($cell_h) - padding * 2});
+    bar.render(window, shader_ptr);
   }
 
   void Sound::play(bool hover) {

src/guecs/ui.cpp

@@ -135,9 +135,9 @@ namespace guecs {
       rect.render(window, shader_ptr);
     });
 
-    query<lel::Cell, Meter>([&](auto ent, auto& cell, auto &meter) {
+    query<Meter>([&](auto ent, auto &meter) {
       auto shader_ptr = find_shader(ent, true);
-      meter.render(cell, window, shader_ptr);
+      meter.render(window, shader_ptr);
     });
 
     query<Sprite>([&](auto ent, auto& sprite) {