Added possibility to use JLayer as a context (#109)

Closes #63.

pom.xml

@@ -120,8 +120,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.3.2</version>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>1.7</source>
+          <target>1.7</target>
         </configuration>
       </plugin>
       <plugin>

src/main/java/org/robotframework/swing/context/DefaultContextVerifier.java

@@ -22,6 +22,7 @@
 
 import javax.swing.JInternalFrame;
 import javax.swing.JPanel;
+import javax.swing.JLayer;
 
 public class DefaultContextVerifier extends AbstractContextVerifier {
     static final String ERROR_MESSAGE = "To use this keyword you must first select a correct context. Please see e.g. \"Select Dialog\" -keyword.";
@@ -33,6 +34,6 @@ public DefaultContextVerifier() {
     @SuppressWarnings("unchecked")
     @Override
     protected Class<? extends Component>[] getExpectedClasses() {
-        return new Class[] { Window.class, JPanel.class, Panel.class, JInternalFrame.class };
+        return new Class[] { Window.class, JPanel.class, Panel.class, JInternalFrame.class, JLayer.class };
     }
 }

src/main/java/org/robotframework/swing/keyword/context/ContextKeywords.java

@@ -74,7 +74,8 @@ private String titleOf(Component component) {
     }
 
     private static void verifyContext(Class contextClass) {
-        Class<? extends Component>[] expectedClasses = new Class[] { Window.class, JPanel.class, Panel.class, JInternalFrame.class };
+        Class<? extends Component>[] expectedClasses = new Class[] { Window.class, JPanel.class, Panel.class,
+                JInternalFrame.class, JLayer.class };
         boolean assignable = false;
         StringBuilder str = new StringBuilder();
         for (Class<? extends Component> expectedClass : expectedClasses) {

src/main/java/org/robotframework/swing/keyword/development/ComponentOccurences.java

@@ -12,6 +12,7 @@
 import javax.swing.JFrame;
 import javax.swing.JInternalFrame;
 import javax.swing.JLabel;
+import javax.swing.JLayer;
 import javax.swing.JLayeredPane;
 import javax.swing.JList;
 import javax.swing.JMenuBar;
@@ -48,6 +49,7 @@ public class ComponentOccurences {
         put(JComboBox.class, -1);
         put(JSpinner.class, -1);
         put(JLabel.class, -1);
+        put(JLayer.class, -1);
         put(JTabbedPane.class, -1);
         put(JRootPane.class, -1);
         put(JLayeredPane.class, -1);

src/main/java/org/robotframework/swing/testapp/TestApplication.java

@@ -29,6 +29,8 @@
 import javax.swing.SwingUtilities;
 import javax.swing.table.JTableHeader;
 import javax.swing.table.TableColumnModel;
+import javax.swing.plaf.LayerUI;
+import javax.swing.JLayer;
 
 public class TestApplication {
     private JPanel panel;
@@ -213,6 +215,16 @@ public void actionPerformed(ActionEvent e) {
         panel.add(tableWithHeader());
         panel.add(new TestScrollPane());
         panel.add(new TestFastUpdatingPane());
+
+        JTextField jLayerTextField = new JTextField() {
+            {
+                setPreferredSize(new Dimension(100, 30));
+            }
+        };
+        LayerUI layerUI = new LayerUI();
+        JLayer jLayer = new JLayer(jLayerTextField, layerUI);
+        jLayer.setName("jLayerComponent");
+        panel.add(jLayer);
     }
 
     private Component tableWithHeader() {

src/test/resources/robot-tests/context.robot

@@ -6,6 +6,7 @@ ${panelName}  Main Panel
 ${dialogMenu2}  Test Menu|Show Non-Modal Dialog
 ${dialogTitle2}  Non-modal Dialog
 ${textFieldName}  testTextField
+${jLayerName}  jLayerComponent
 
 *** Test Cases ***
 Select Context
@@ -16,7 +17,7 @@ Select Context
 
 Select Invalid Context should fail
     Select And Assert Main Window
-    Run keyword and expect error    Invalid context *. Should be one of (java.awt.Window javax.swing.JPanel java.awt.Panel javax.swing.JInternalFrame )    selectContext    ${textFieldName}
+    Run keyword and expect error    Invalid context *. Should be one of (java.awt.Window javax.swing.JPanel java.awt.Panel javax.swing.JInternalFrame javax.swing.JLayer )    selectContext    ${textFieldName}
 
 Get Current Context With Panels
     Select And Assert Main Window
@@ -46,6 +47,14 @@ Get Current Context With Dialog
     Should Be Equal  ${dialogTitle2}  ${title}
     [Teardown]  closeDialog  ${dialogTitle2}
 
+Get Current Context With JLayer
+    Select And Assert Main Window
+    selectContext  ${jLayerName}
+    ${contextName}=  getCurrentContext
+    Should Be Equal  ${contextName}  ${jLayerName}
+    ${contextAsString}=  getCurrentContextSourceAsString
+    shouldContain  ${contextAsString}  ${jLayerName}
+
 *** Keywords ***
 Select And Assert Main Window
     selectMainWindow