fix for issue #99 - Why do the FileFilters within XChartPanel don't accept directories? (2)

xchart/src/main/java/com/xeiam/xchart/XChartPanel.java

@@ -151,9 +151,15 @@ public class XChartPanel extends JPanel {
     @Override
     public boolean accept(File f) {
 
+      if (f.isDirectory()) {
         return true;
       }
 
+      String s = f.getName();
+
+      return s.endsWith(".jpg") || s.endsWith(".JPG");
+    }
+
     @Override
     public String getDescription() {
 
@@ -167,9 +173,15 @@ public class XChartPanel extends JPanel {
     @Override
     public boolean accept(File f) {
 
+      if (f.isDirectory()) {
         return true;
       }
 
+      String s = f.getName();
+
+      return s.endsWith(".bmp") || s.endsWith(".BMP");
+    }
+
     @Override
     public String getDescription() {
 
@@ -183,9 +195,15 @@ public class XChartPanel extends JPanel {
     @Override
     public boolean accept(File f) {
 
+      if (f.isDirectory()) {
         return true;
       }
 
+      String s = f.getName();
+
+      return s.endsWith(".gif") || s.endsWith(".GIF");
+    }
+
     @Override
     public String getDescription() {
 
@@ -199,9 +217,15 @@ public class XChartPanel extends JPanel {
     @Override
     public boolean accept(File f) {
 
+      if (f.isDirectory()) {
         return true;
       }
 
+      String s = f.getName();
+
+      return s.endsWith(".png") || s.endsWith(".PNG");
+    }
+
     @Override
     public String getDescription() {