Added SFML event handler

src/events.c

@@ -0,0 +1,66 @@
+#include <stdint.h>
+
+#include <SFML/Graphics/RenderWindow.h>
+#include <SFML/System.h>
+#include <SFML/Graphics.h>
+#include <SFML/Window.h>
+
+extern float displayScale;
+
+extern void resetSystem();
+extern void irq6502();
+extern void nmi6502();
+extern void updateRenderStates();
+extern void scanKeyboard();
+
+static sfKeyCode currentKey = sfKeyUnknown;
+
+void pollEvents(sfRenderWindow *window){
+
+	sfEvent event;
+	while (sfRenderWindow_pollEvent(window, &event)) {
+		switch (event.type){
+			case sfEvtClosed:
+				sfRenderWindow_close(window);
+				break;
+				
+			case sfEvtResized:
+				sfRenderWindow_setView(window, sfView_createFromRect((sfFloatRect){0, 0, event.size.width, event.size.height}));
+				break;
+			case sfEvtKeyPressed:
+				switch (event.key.code){
+					case sfKeyEscape:
+						sfRenderWindow_close(window);
+						break;
+						
+					case sfKeyF2:
+						if (displayScale > 1) displayScale--;
+						updateRenderStates();
+						break;
+					case sfKeyF3:
+						displayScale++;
+						updateRenderStates();
+						break;
+					case sfKeyF5:
+						resetSystem();
+						break;
+					case sfKeyF12:
+						irq6502();
+						break;
+					case sfKeyF11:
+						nmi6502();
+						break;
+						
+					default:
+						currentKey = event.key.code;
+						break;
+				}
+				break;
+			case sfEvtKeyReleased:
+				currentKey = sfKeyUnknown;
+				break;
+					
+			default: break;
+		}
+	}
+}