Use thick separators for JSplitPane's, as the interface is clearer (#177

).

NEWS.txt

@@ -13,9 +13,11 @@ Version 0.24.8
 - Add norator and nullator symbols for the EY library (issue #167).
 - More precise handling of dashed curves (issue #161).
 - Correct handling of accented characters for Java >7 (issue #149).
+- Fix incompatibility with Java versions >=9 (issue #150).
 
 Version 0.24.7
 --------------
+Requires Java 1.7
 (April 26, 2017)
 - Improvement of the building tools and scripts.
 - Improved backwards compatibility with PCB tracks with non integer size (#107).

src/net/sourceforge/fidocadj/FidoFrame.java

@@ -593,6 +593,7 @@ public void init()
 
         // Useful for Quaqua with MacOSX.
         //splitPane.putClientProperty("Quaqua.SplitPane.style","bar");
+        splitPane.putClientProperty("JSplitPane.style","thick");
 
         Dimension windowSize = getSize();
         cc.setPreferredSize(new Dimension(windowSize.width*85/100,100));

src/net/sourceforge/fidocadj/macropicker/MacroTree.java

@@ -50,7 +50,7 @@
     along with FidoCadJ. If not,
     @see <a href=http://www.gnu.org/licenses/>http://www.gnu.org/licenses/</a>.
 
-    Copyright 2014 Kohta Ozaki, Davide Bucci
+    Copyright 2014-2020 Kohta Ozaki, Davide Bucci
     </pre>
 
     @author Kohta Ozaki, Davide Bucci
@@ -100,6 +100,8 @@ public MacroTree(LibraryModel libraryModel, LayerModel layerModel)
     private void initComponents()
     {
         JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
+        splitPane.putClientProperty("JSplitPane.style","thick");
+
         Box topBox = Box.createVerticalBox();
 
         setLayout(new GridLayout(1, 0));