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23 
24 import javax.swing.*;
25 import java.awt.*;
26 import java.awt.event.MouseAdapter;
27 import java.awt.event.MouseEvent;
28 
29 /*
30  * @test
31  * @bug 8024627
32  * @summary Check if a JComboBox present in a window set with opacity less than
33  *          1.0 shows a translucent drop down
34  * Test Description: Check if TRANSLUCENT translucency type is supported on the
35  *      current platform. Proceed if supported. Show a window which contains an
36  *      JComboBox and set with opacity less than 1.0. Another Window having a canvas
37  *      component drawn with an image can be used as the background for the test
38  *      window. Click on the ComboBox to show the drop down. Check if the drop down
39  *      appears translucent. Repeat this for JWindow, JDialog and JFrame
40  * Expected Result: If TRANSLUCENT Translucency type is supported, the drop down
41  *      should appear translucent.
42  * @author mrkam
43  * @library ../../../../lib/testlibrary
44  * @build Common ExtendedRobot
45  * @run main TranslucentJComboBox
46  */
47 
48 public class TranslucentJComboBox extends Common {
49 
50     JComponent south;
51     JComponent center;
52     JPanel north;
53     volatile boolean southClicked = false;
54 
main(String[] args)55     public static void main(String[] args) throws Exception {
56         if (checkTranslucencyMode(GraphicsDevice.WindowTranslucency.TRANSLUCENT))
57             for (Class<Window> windowClass: WINDOWS_TO_TEST)
58                 new TranslucentJComboBox(windowClass).doTest();
59     }
60 
TranslucentJComboBox(Class windowClass)61     public TranslucentJComboBox(Class windowClass) throws Exception {
62         super(windowClass, 0.3f, 1.0f, false);
63     }
64 
65     @Override
initBackgroundFrame()66     public void initBackgroundFrame() {
67         super.initBackgroundFrame();
68     }
69 
70     @Override
createSwingComponents()71     public void createSwingComponents() {
72         Container contentPane = RootPaneContainer.class.cast(window).getContentPane();
73         window.setLayout(new BorderLayout());
74 
75         north = new JPanel();
76         contentPane.add(north, BorderLayout.NORTH);
77 
78         center = new JList(new String [] { "Center" });
79         contentPane.add(center, BorderLayout.CENTER);
80 
81         JComboBox jComboBox = new JComboBox();
82         for(int i = 0; i < 20; i++) {
83             jComboBox.addItem("item " + i);
84         }
85         south = jComboBox;
86 
87         south.addMouseListener(new MouseAdapter() {
88             @Override
89             public void mouseClicked(MouseEvent e) {
90                 southClicked = true;
91             }
92         });
93         contentPane.add(south, BorderLayout.SOUTH);
94     }
95 
96 
97     @Override
doTest()98     public void doTest() throws Exception {
99         robot.waitForIdle(delay);
100         // Make window an active
101         Point ls = north.getLocationOnScreen();
102         robot.mouseMove(ls.x + north.getWidth()/2, ls.y + north.getHeight()/2);
103         robot.click();
104 
105         // Invoke list
106         ls = south.getLocationOnScreen();
107 
108         Point p1 = new Point(
109                 (int) (ls.x + south.getWidth() * 0.75),
110                 ls.y + south.getHeight() * 3);
111 
112         Point p2 = new Point(
113                 (int) (ls.x + south.getWidth() * 0.75),
114                 ls.y - south.getHeight() * 2);
115 
116         Color c1 = robot.getPixelColor(p1.x, p1.y);
117         Color c2 = robot.getPixelColor(p2.x, p2.y);
118 
119         int x = ls.x + south.getWidth()/2;
120         int y = ls.y + south.getHeight()/2;
121 
122         System.out.println("Trying to click point "+x+", "+y+
123                 ", looking for flag to trigger.");
124 
125         robot.mouseMove(x, y);
126         robot.waitForIdle(delay);
127         robot.click();
128         robot.waitForIdle(delay);
129 
130         if (!southClicked)
131             throw new RuntimeException("Flag is not triggered for point "+x+", "+y+"!");
132 
133         robot.waitForIdle();
134 
135         Color c1b = robot.getPixelColor(p1.x, p1.y);
136         Color c2b = robot.getPixelColor(p2.x, p2.y);
137 
138         if (!c1.equals(c1b) && !south.getBackground().equals(c1b))
139             throw new RuntimeException(
140                     "Check for opaque drop down failed at point " + p1 +
141                             ". Before click: " + c1 + ", after click: " + c1b +
142                             ", expected is " + south.getBackground());
143 
144         if (!c2.equals(c2b) && !south.getBackground().equals(c2b))
145             throw new RuntimeException(
146                     "Check for opaque drop down failed at point " + p2 +
147                             ". Before click: " + c2 + ", after click: " + c2b +
148                             ", expected is " + south.getBackground());
149 
150         EventQueue.invokeAndWait(this::dispose);
151     }
152 }
153