Bug 935: NEWT OSX PointerIcon/Pointer-Visibility: Impl. OffscreenLayerSurface (OSX CALayer) w/ JAWTWindow Path

Add setCursor(..) and hideCursor() to OffscreenLayerSurface interface,
impl. in JAWTWindow w/ AWT.

This allows an OSX NEWT Window using CALayer (i.e. NewtCanvasAWT)
to have setPointerIcon(..) and setPointerVisible(..) functionality!

3 files changed, 85 insertions, 0 deletions

diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java b/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
index 3c660b41b..46bdc4d1f 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/awt/JAWTWindow.java
@@ -38,18 +38,21 @@
 package com.jogamp.nativewindow.awt;
 
 import com.jogamp.common.os.Platform;
+import com.jogamp.common.util.IOUtil;
 import com.jogamp.common.util.locks.LockFactory;
 import com.jogamp.common.util.locks.RecursiveLock;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 
 import java.awt.Component;
 import java.awt.Container;
+import java.awt.Cursor;
 import java.awt.Window;
 import java.awt.event.ComponentEvent;
 import java.awt.event.ComponentListener;
 import java.awt.event.HierarchyEvent;
 import java.awt.event.HierarchyListener;
 import java.applet.Applet;
+import java.io.IOException;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
@@ -63,6 +66,7 @@ import javax.media.nativewindow.SurfaceUpdatedListener;
 import javax.media.nativewindow.util.Insets;
 import javax.media.nativewindow.util.InsetsImmutable;
 import javax.media.nativewindow.util.Point;
+import javax.media.nativewindow.util.PointImmutable;
 import javax.media.nativewindow.util.Rectangle;
 import javax.media.nativewindow.util.RectangleImmutable;
 
@@ -427,6 +431,30 @@ public abstract class JAWTWindow implements NativeWindow, OffscreenLayerSurface,
       return surfaceLock;
   }
 
+  @Override
+  public final boolean setCursor(IOUtil.ClassResources resources, PointImmutable hotSpot) throws IOException {
+      final Cursor c;
+      if( null == resources || null == hotSpot ) {
+          c = Cursor.getDefaultCursor();
+      } else {
+          final java.awt.Point awtHotspot = new java.awt.Point(hotSpot.getX(), hotSpot.getY());
+          c = AWTMisc.getCursor(resources, awtHotspot);
+      }
+      if( null != c ) {
+          component.setCursor(c);
+          return true;
+      } else {
+          return false;
+      }
+  }
+
+  @Override
+  public boolean hideCursor() {
+      final Cursor c = AWTMisc.getNullCursor();
+      component.setCursor(c);
+      return true;
+  }
+
   //
   // SurfaceUpdateListener
   //
diff --git a/src/nativewindow/classes/javax/media/nativewindow/OffscreenLayerSurface.java b/src/nativewindow/classes/javax/media/nativewindow/OffscreenLayerSurface.java
index 8681422ef..81983a7c2 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/OffscreenLayerSurface.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/OffscreenLayerSurface.java
@@ -27,6 +27,11 @@
  */
 package javax.media.nativewindow;
 
+import java.io.IOException;
+
+import javax.media.nativewindow.util.PointImmutable;
+
+import com.jogamp.common.util.IOUtil;
 import com.jogamp.common.util.locks.RecursiveLock;
 
 /**
@@ -65,4 +70,19 @@ public interface OffscreenLayerSurface {
   /** Returns the recursive lock object of this surface, which synchronizes multithreaded access. */
   public RecursiveLock getLock();
 
+  /**
+   * Optional method setting cursor in the corresponding on-screen surface/window, if exists.
+   *
+   * @param resources maybe null for default cursor
+   * @param hotSpot maybe null for default cursor
+   * @return true if successful, i.e. on-screen surface/window w/ cursor capabilities exists. Otherwise false.
+   * @throws IOException
+   */
+  public boolean setCursor(IOUtil.ClassResources resources, PointImmutable hotSpot) throws IOException;
+  /**
+   * Optional method hiding the cursor in the corresponding on-screen surface/window, if exists.
+   *
+   * @return true if successful, i.e. on-screen surface/window w/ cursor capabilities exists. Otherwise false.
+   */
+  public boolean hideCursor();
 }
diff --git a/src/nativewindow/classes/jogamp/nativewindow/awt/AWTMisc.java b/src/nativewindow/classes/jogamp/nativewindow/awt/AWTMisc.java
index 0fa5006cc..31de84137 100644
--- a/src/nativewindow/classes/jogamp/nativewindow/awt/AWTMisc.java
+++ b/src/nativewindow/classes/jogamp/nativewindow/awt/AWTMisc.java
@@ -27,21 +27,31 @@
  */
 package jogamp.nativewindow.awt;
 
+import java.awt.Cursor;
 import java.awt.FocusTraversalPolicy;
 import java.awt.Insets;
+import java.awt.Point;
+import java.awt.Toolkit;
 import java.awt.Window;
 import java.awt.Component;
 import java.awt.Container;
 import java.awt.Frame;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.net.URLConnection;
+import java.util.HashMap;
 
 import javax.swing.JComponent;
 import javax.swing.JFrame;
 import javax.swing.JRootPane;
 import javax.swing.WindowConstants;
+import javax.imageio.ImageIO;
 import javax.media.nativewindow.NativeWindowException;
 import javax.media.nativewindow.WindowClosingProtocol;
 import javax.swing.MenuSelectionManager;
 
+import com.jogamp.common.util.IOUtil;
+
 public class AWTMisc {
 
     public static JFrame getJFrame(Component c) {
@@ -163,6 +173,33 @@ public class AWTMisc {
         MenuSelectionManager.defaultManager().clearSelectedPath();
     }
 
+    static final HashMap<String, Cursor> cursorMap = new HashMap<String, Cursor>();
+    static final Cursor nulCursor;
+    static {
+        final Toolkit toolkit = Toolkit.getDefaultToolkit();
+        BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR);
+        nulCursor = toolkit.createCustomCursor(img, new Point(0,0), "nullCursor");
+    }
+
+    public static synchronized Cursor getNullCursor() { return nulCursor; }
+
+    public static synchronized Cursor getCursor(IOUtil.ClassResources resources, Point hotSpot) throws IOException {
+        final String key = resources.getClass().getName()+":"+resources.resourcePaths[0];
+        Cursor cursor = cursorMap.get(key);
+        if( null == cursor ) {
+            cursor = createAWTCursor(resources, hotSpot);
+            cursorMap.put(key, cursor);
+        }
+        return cursor;
+    }
+    private static synchronized Cursor createAWTCursor(IOUtil.ClassResources resources, Point hotSpot) throws IOException {
+        final URLConnection urlConn = resources.resolve(0);
+        BufferedImage img = ImageIO.read(urlConn.getInputStream());
+
+        final Toolkit toolkit = Toolkit.getDefaultToolkit();
+        return toolkit.createCustomCursor(img, hotSpot, resources.resourcePaths[0]);
+    }
+
     public static WindowClosingProtocol.WindowClosingMode AWT2NWClosingOperation(int awtClosingOperation) {
         switch (awtClosingOperation) {
             case WindowConstants.DISPOSE_ON_CLOSE: