Examples with DragSourceListener java.awt.dnd.DragSourceListener used on opensource projects

Example 1 with DragSourceListener

use of java.awt.dnd.DragSourceListener in project jdk8u_jdk by JetBrains.

the class TestDragSourceAdapter method main.

public static void main(String[] args) throws Exception {
    DragSource ds = new DragSource();
    TestDragSourceAdapter dsa1 = new TestDragSourceAdapter(1);
    TestDragSourceAdapter dsa2 = new TestDragSourceAdapter(2);
    Component c = new Button();
    DragGestureRecognizer dgr = ds.createDefaultDragGestureRecognizer(c, DnDConstants.ACTION_COPY, e -> e.startDrag(null, null));
    MouseEvent me = new MouseEvent(c, MouseEvent.MOUSE_PRESSED, 0, InputEvent.CTRL_MASK, 100, 100, 0, false);
    DragGestureEvent dge = new DragGestureEvent(dgr, DnDConstants.ACTION_COPY, new Point(100, 100), Arrays.asList(me));
    DragSourceContext dsc = new DragSourceContext(Toolkit.getDefaultToolkit().createDragSourceContextPeer(dge), dge, new Cursor(Cursor.HAND_CURSOR), null, null, new StringSelection("TEXT"), null);
    ds.addDragSourceListener(dsa1);
    ds.addDragSourceListener(dsa2);
    ds.addDragSourceListener(dsa2);
    ds.addDragSourceMotionListener(dsa1);
    ds.addDragSourceMotionListener(dsa1);
    ds.addDragSourceMotionListener(dsa2);
    dsc.addDragSourceListener(dsa2);
    byte[] serialized;
    try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos)) {
        oos.writeObject(dsc);
        serialized = bos.toByteArray();
    }
    DragSourceContext dsc_copy;
    try (ByteArrayInputStream bis = new ByteArrayInputStream(serialized);
        ObjectInputStream ois = new ObjectInputStream(bis)) {
        dsc_copy = (DragSourceContext) ois.readObject();
    }
    try {
        dsc_copy.addDragSourceListener(dsa1);
        throw new RuntimeException("Test failed. Listener addition succeeded");
    } catch (TooManyListenersException ignored) {
    }
    try {
        dsc_copy.addDragSourceListener(dsa2);
        throw new RuntimeException("Test failed. Listener addition succeeded");
    } catch (TooManyListenersException ignored) {
    }
    try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bos)) {
        oos.writeObject(ds);
        serialized = bos.toByteArray();
    }
    DragSource ds_copy;
    try (ByteArrayInputStream bis = new ByteArrayInputStream(serialized);
        ObjectInputStream ois = new ObjectInputStream(bis)) {
        ds_copy = (DragSource) ois.readObject();
    }
    DragSourceListener[] dsls = ds_copy.getDragSourceListeners();
    assertEquals(3, dsls.length, "DragSourceListeners number");
    assertEquals(1, Stream.of(dsls).filter(dsa1::equals).collect(Collectors.counting()).intValue());
    assertEquals(2, Stream.of(dsls).filter(dsa2::equals).collect(Collectors.counting()).intValue());
    DragSourceMotionListener[] dsmls = ds_copy.getDragSourceMotionListeners();
    assertEquals(3, dsmls.length, "DragSourceMotionListeners number");
    assertEquals(2, Stream.of(dsmls).filter(dsa1::equals).collect(Collectors.counting()).intValue());
    assertEquals(1, Stream.of(dsmls).filter(dsa2::equals).collect(Collectors.counting()).intValue());
}