Impl some structure to the project

CMakeLists.txt

@@ -19,6 +19,7 @@ endif()
 
 set(Triangles_SOURCES
     src/main.cpp
+    src/state.cpp
     third_party/imgui/imgui.cpp
     third_party/imgui/imgui_draw.cpp
     third_party/imgui/imgui_widgets.cpp

src/imgui_helper.hpp

@@ -0,0 +1,22 @@
+#ifndef TRIANGLES_IMGUI_HELPER_HPP
+#define TRIANGLES_IMGUI_HELPER_HPP
+
+#include <imgui.h>
+
+#include "state.hpp"
+
+namespace Tri {
+    inline void draw_help(Tri::State *state) {
+        if(state->flags.test(0)) {
+            ImGui::SetNextWindowPos(sf::Vector2f(10.0f, 10.0f));
+            ImGui::SetNextWindowSize(sf::Vector2f(
+                state->width - 20.0f,
+                state->height - 20.0f));
+            ImGui::Begin("Help Window", nullptr, ImGuiWindowFlags_NoDecoration);
+            ImGui::Text("This is the help window.");
+            ImGui::End();
+        }
+    }
+}
+
+#endif

src/main.cpp

@@ -5,12 +5,19 @@
 #include <imgui.h>
 #include <imgui-SFML.h>
 
+#include "state.hpp"
+#include "imgui_helper.hpp"
+
 int main(int argc, char **argv) {
     // init
-    sf::RenderWindow window(sf::VideoMode(800, 600), "Triangles");
+    Tri::State state{};
+
+    sf::RenderWindow window(
+        sf::VideoMode(state.width, state.height),
+        "Triangles",
+        sf::Style::Titlebar | sf::Style::Close);
     ImGui::SFML::Init(window);
     window.setFramerateLimit(60);
-    const sf::Time dt = sf::microseconds(16666);
 
     // main loop
     sf::Event event;
@@ -20,21 +27,28 @@ int main(int argc, char **argv) {
         ImGui::SFML::ProcessEvent(event);
         if(event.type == sf::Event::Closed) {
             window.close();
+        } else if(event.type == sf::Event::KeyPressed) {
+            if(event.key.code == sf::Keyboard::H) {
+                state.flags.set(0);
+            }
+        } else if(event.type == sf::Event::KeyReleased) {
+            if(event.key.code == sf::Keyboard::H) {
+                state.flags.reset(0);
+            }
         }
 
         // update
-        ImGui::SFML::Update(window, dt);
+        ImGui::SFML::Update(window, state.dt);
 
-        ImGui::Begin("Test window");
-        ImGui::Text("Test text");
+        state.update();
 
-        ImGui::End();
         ImGui::EndFrame();
         // update end
 
         // draw
         window.clear();
         ImGui::SFML::Render(window);
+        state.draw();
         window.display();
     }
 

src/state.cpp

@@ -0,0 +1,16 @@
+#include "state.hpp"
+
+#include "imgui_helper.hpp"
+
+Tri::State::State() :
+width(800),
+height(600),
+dt(sf::microseconds(16666))
+{}
+
+void Tri::State::update() {
+    Tri::draw_help(this);
+}
+
+void Tri::State::draw() {
+}

src/state.hpp

@@ -0,0 +1,24 @@
+#ifndef TRIANGLES_STATE_HPP
+#define TRIANGLES_STATE_HPP
+
+#include <bitset>
+
+#include <SFML/System.hpp>
+
+namespace Tri {
+    struct State {
+        State();
+        /*
+         * 0 - display help
+         */
+        std::bitset<64> flags;
+        const unsigned int width;
+        const unsigned int height;
+        const sf::Time dt;
+
+        void update();
+        void draw();
+    };
+}
+
+#endif