add detailed sfml example

add simple wxWidgets example

CPlusPlus/sfml/main.cpp

@@ -1,13 +1,47 @@
 #include "SFML/Graphics.hpp"
 
-//using namespace sf;
+using namespace sf;
 
 int main()
 {
-	sf::RenderWindow window(sf::VideoMode({ 640, 480 }), "Hello World Example");
+	RenderWindow window(VideoMode({ 640, 480 }), "Hello World Example");
+
+	CircleShape circle(100.0f);
+	circle.setFillColor(Color(200, 0, 0));
+
+	Texture texture("assets/card_clubs_02.png");
+	Sprite sprite(texture);
 
 	while (window.isOpen())
 	{
+		while (const std::optional event = window.pollEvent())
+		{
+			if (event->is<Event::Closed>()) 
+			{
+				window.close();
+			}
+			//else if (event->is<Event::KeyPressed>()) {
+			else if (const Event::KeyPressed* keyPressed = event->getIf<Event::KeyPressed>()) 
+			{
+				if (keyPressed->scancode == Keyboard::Scancode::Escape) 
+				{
+					window.close();
+				}
+			}
+		}
+
+		// move circle
+		//circle.setPosition(circle.getPosition() + Vector2f(1, 0));
+
+		if (Keyboard::isKeyPressed(Keyboard::Scancode::Right))
+		{
+			circle.setPosition(circle.getPosition() + Vector2f(1, 0));
+		}
+
+		// clear window to start each frame from scratch
+		window.clear();
+		window.draw(circle);
+		window.draw(sprite);
 		window.display();
 	}