able to click with cursor, button detect clicking event

Main.cpp

@@ -7,6 +7,8 @@
 #define STB_IMAGE_IMPLEMENTATION
 #include "stb_image.h"
 
+#include "Cursor.h"
+
 void configureOpenGL(void);
 
 CrystalPoint* app;
@@ -53,6 +55,17 @@ int main(int argc, char* argv[])
 	glutPassiveMotionFunc(mousemotion);
 	glutMotionFunc(mousemotion);
 
+	auto mouseclick = [](int button, int state,
+		int x, int y)
+	{
+		if (button == GLUT_LEFT_BUTTON)
+			Cursor::getInstance()->state = state;
+
+			//std::cout << "Left button is down" << std::endl;
+	};
+
+	glutMouseFunc(mouseclick);
+
 	CrystalPoint::height = GLUT_WINDOW_HEIGHT;
 	CrystalPoint::width = GLUT_WINDOW_WIDTH;
 
@@ -67,6 +80,7 @@ void configureOpenGL()
 	//Init window and glut display mode
 	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
 	glutInitWindowSize(800, 600);
+	//glutInitWindowPosition(1000,800);
 	glutCreateWindow("Crystal Point");
 	glutFullScreen();