Merge pull request #63 from vincenzopalazzo/mousehovereffect

Added mouse Hover effect for TabbedPane

Author: atarw

src/main/java/mdlaf/components/tabbedpane/MaterialTabbedPaneUI.java

@@ -7,15 +7,18 @@
 import javax.swing.UIManager;
 import javax.swing.plaf.ComponentUI;
 import javax.swing.plaf.basic.BasicTabbedPaneUI;
-import java.awt.Graphics;
-import java.awt.Rectangle;
+import java.awt.*;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseMotionListener;
 
 public class MaterialTabbedPaneUI extends BasicTabbedPaneUI {
 
 	public static ComponentUI createUI (JComponent c) {
 		return new MaterialTabbedPaneUI ();
 	}
 
+	private JComponent component;
+
 	@Override
 	public void installUI (JComponent c) {
 		super.installUI (c);
@@ -30,6 +33,8 @@ public void installUI (JComponent c) {
 		darkShadow = UIManager.getColor ("TabbedPane.darkShadow");
 		shadow = UIManager.getColor ("TabbedPane.shadow");
 		lightHighlight = UIManager.getColor ("TabbedPane.highlight");
+
+		component = tabbedPane;
 	}
 
 	@Override
@@ -58,5 +63,35 @@ protected void paintFocusIndicator (Graphics g, int tabPlacement, Rectangle[] re
 	protected void paintTab (Graphics g, int tabPlacement, Rectangle[] rects, int tabIndex, Rectangle iconRect, Rectangle textRect) {
 		// for some reason tabs aren't painted properly by paint()
 		super.paintTab (MaterialDrawingUtils.getAliasedGraphics (g), tabPlacement, rects, tabIndex, iconRect, textRect);
+		component.addMouseMotionListener(new MouseHoverTab(rects));
+	}
+
+	private class MouseHoverTab implements MouseMotionListener {
+
+		private Rectangle[] rectangles;
+
+		public MouseHoverTab(Rectangle[] rectangles) {
+			this.rectangles = rectangles;
+		}
+
+		@Override
+		public void mouseDragged(MouseEvent e) {
+		}
+
+		@Override
+		public void mouseMoved(MouseEvent e) {
+			JComponent mouseGenerate = (JComponent) e.getSource();
+			if (!mouseGenerate.isEnabled()) {
+				return;
+			}
+			Point point = e.getPoint();
+			for (Rectangle r : rectangles) {
+				if (r.contains(point)) {
+					mouseGenerate.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
+					return;
+				}
+			}
+			mouseGenerate.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
+		}
 	}
 }