add separator line at the bottom of the toolbar

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/ui/runner/GradientToolbar.xtend

@@ -14,20 +14,23 @@ class GradientToolbar extends JToolBar {
 			return
 		}
 
-		// paint gradient background from top to bottom
+		// paint gradient background from top to bottom with separator line at the bottom
 		val g2d = g as Graphics2D
 		val w = width
-        val h = height
+        val h = height - 1
         val h2 = height / 2 as int
         val colorTop = new Color(237, 237, 237)
         val colorMiddle = new Color(244, 244, 244)
         val colorBottom = new Color(254, 254, 254)
+        val colorBottomLine = Color.LIGHT_GRAY
         val gp1 = new GradientPaint(0, 0, colorTop, 0, h2, colorMiddle)
         g2d.paint = gp1
         g2d.fillRect(0, 0, w, h2)
         val gp2 = new GradientPaint(0, h2, colorMiddle, 0, h, colorBottom)
         g2d.paint = gp2
         g2d.fillRect(0, h2, w, h)
+        g2d.paint = colorBottomLine
+        g2d.fillRect(0, h, w, h+1)
 
 		// do rest, changing opaque to ensure background is not overwritten
 		setOpaque(false)