Replaced automatic closing with window parameter.

tests/windows.c

@@ -32,14 +32,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-static GLboolean running = GL_TRUE;
-
-static int window_close_callback(GLFWwindow window)
-{
-    running = GL_FALSE;
-    return GL_TRUE;
-}
-
 static const char* titles[] =
 {
     "Foo",
@@ -51,6 +43,7 @@ static const char* titles[] =
 int main(void)
 {
     int i;
+    GLboolean running = GL_TRUE;
     GLFWwindow windows[4];
 
     if (!glfwInit())
@@ -60,8 +53,6 @@ int main(void)
         exit(EXIT_FAILURE);
     }
 
-    glfwSetWindowCloseCallback(window_close_callback);
-
     for (i = 0;  i < 4;  i++)
     {
         windows[i] = glfwCreateWindow(200, 200, GLFW_WINDOWED, titles[i], NULL);
@@ -88,6 +79,9 @@ int main(void)
             glfwMakeContextCurrent(windows[i]);
             glClear(GL_COLOR_BUFFER_BIT);
             glfwSwapBuffers(windows[i]);
+
+            if (glfwGetWindowParam(windows[i], GLFW_CLOSE_REQUESTED))
+                running = GL_FALSE;
         }
 
         glfwPollEvents();