Add isClosureRequested() method

base/src/main/java/de/staropensource/sosengine/base/classes/Event.java

@@ -28,6 +28,8 @@ package de.staropensource.sosengine.base.classes;
 public interface Event {
     /**
      * Calls the event and notifies all annotated methods.
+     *
+     * @since v1-alpha0
      */
     void callEvent();
 }

graphics/opengl/src/main/java/de/staropensource/sosengine/graphics/opengl/classes/Window.java

@@ -131,6 +131,12 @@ public class Window extends de.staropensource.sosengine.graphics.classes.Window
         return getPosition();
     }
 
+    /** {@inheritDoc} */
+    @Override
+    public boolean isClosureRequested() {
+        return glfwWindowShouldClose(getIdentifierAsLong());
+    }
+
     /**
      * Returns the window identifier as a long.
      *

graphics/src/main/java/de/staropensource/sosengine/graphics/classes/Window.java

@@ -329,6 +329,17 @@ public abstract class Window {
     @Setter
     private boolean rendering;
 
+    /**
+     * Returns a set of active windows.
+     *
+     * @return active windows
+     * @since v1-alpha2
+     */
+    @NotNull
+    public static ImmutableHashSet<@NotNull Window> getWindows() {
+        return new ImmutableHashSet<>(windows);
+    }
+
     /**
      * Creates a new window.
      *
@@ -377,17 +388,6 @@ public abstract class Window {
         windows.add(this);
     }
 
-    /**
-     * Returns a set of active windows.
-     *
-     * @return active windows
-     * @since v1-alpha2
-     */
-    @NotNull
-    public static ImmutableHashSet<@NotNull Window> getWindows() {
-        return new ImmutableHashSet<>(windows);
-    }
-
     /**
      * Allows the Graphics API to initialize the window.
      * <p>
@@ -433,6 +433,15 @@ public abstract class Window {
     @NotNull
     public abstract Vec2i getPositionWithDecorations();
 
+    /**
+     * Returns if the user, window manager or
+     * compositor send a request for the window to close.
+     *
+     * @return {@code true} if a window closure has been requested
+     * @since v1-alpha2
+     */
+    public abstract boolean isClosureRequested();
+
     /**
      * Provides an API for building {@link Window} classes more easily.
      *