Name: jtC48319 Date: 05/22/98


when you drag a component from one window
and drop it into another in ALL previous
versions you got a mouse enter in the window
which had the component dropped in it. In
1.1.6 you get nothing! How can we implement
dragging between windows if there are no
events being generated in the window receiving
the drop at the time of the drop ????

This is a serious bug of 1.1.6 in solaris.


jukka@canada 1998-05-22

Below is additional information and test program provided by the customer.

Type

javac MouseEvents.java

to compile. and

java MouseEvents

to run. There are two windows
one with a grey backgound the other containing a blue
panel. Try dragging the blue panel over to the grey window
as if you were going to drop it into the grey window. Notice
the events which are printed out. For 1.1.6. you never get
a mouse enter on the frame receiving the drop which is absolutely
crucial in detecting which window you are dropping a panel
into. So for example the program outputs the following :-


In 1.1.3 you get when mouse is being dragged :-

Panel: MOUSE_PRESSED 189 179
Panel: MOUSE_DRAGGED 186 180
Panel: MOUSE_DRAGGED 179 182
Panel: MOUSE_DRAGGED 168 183
Panel: MOUSE_DRAGGED 156 183
Panel: MOUSE_DRAGGED 118 181
Panel: MOUSE_DRAGGED 78 179
Panel: MOUSE_DRAGGED 46 175
Panel: MOUSE_DRAGGED 34 170
Panel: MOUSE_DRAGGED 2 164
Panel: MOUSE_EXITED -11 158
Panel: MOUSE_DRAGGED -21 153
Panel: MOUSE_DRAGGED -27 149
Panel: MOUSE_DRAGGED -34 143
Panel: MOUSE_DRAGGED -39 137
Panel: MOUSE_DRAGGED -43 133
Panel: MOUSE_DRAGGED -46 131
Panel: MOUSE_DRAGGED -51 128
Panel: MOUSE_DRAGGED -57 126
Panel: MOUSE_DRAGGED -66 123
Panel: MOUSE_DRAGGED -74 120
Panel: MOUSE_DRAGGED -81 117
Panel: MOUSE_DRAGGED -85 115
Panel: MOUSE_DRAGGED -86 115
Panel: MOUSE_DRAGGED -88 115
Panel: MOUSE_DRAGGED -93 117
Panel: MOUSE_RELEASED -93 117
Panel: MOUSE_EXITED -93 117
frame0: MOUSE_EXITED -88 142
frame1: MOUSE_ENTERED 212 242


In 1.1.6 you get :-

Panel: MOUSE_PRESSED 187 162
Panel: MOUSE_DRAGGED 186 162
Panel: MOUSE_DRAGGED 182 162
Panel: MOUSE_DRAGGED 177 161
Panel: MOUSE_DRAGGED 174 161
Panel: MOUSE_DRAGGED 171 161
Panel: MOUSE_DRAGGED 165 162
Panel: MOUSE_DRAGGED 160 162
Panel: MOUSE_DRAGGED 152 162
Panel: MOUSE_DRAGGED 143 162
Panel: MOUSE_DRAGGED 134 162
Panel: MOUSE_DRAGGED 123 162
Panel: MOUSE_DRAGGED 83 161
Panel: MOUSE_DRAGGED 49 161
Panel: MOUSE_DRAGGED 40 160
Panel: MOUSE_DRAGGED 35 158
Panel: MOUSE_DRAGGED 28 155
Panel: MOUSE_DRAGGED 17 153
Panel: MOUSE_DRAGGED 3 150
Panel: MOUSE_EXITED -9 147
Panel: MOUSE_DRAGGED -27 139
Panel: MOUSE_DRAGGED -34 134
Panel: MOUSE_DRAGGED -37 131
Panel: MOUSE_DRAGGED -41 128
Panel: MOUSE_DRAGGED -45 123
Panel: MOUSE_DRAGGED -56 116
Panel: MOUSE_DRAGGED -66 108
Panel: MOUSE_DRAGGED -76 99
Panel: MOUSE_DRAGGED -86 92
Panel: MOUSE_DRAGGED -94 87
Panel: MOUSE_DRAGGED -97 86
Panel: MOUSE_DRAGGED -96 86
Panel: MOUSE_DRAGGED -96 88
Panel: MOUSE_RELEASED -96 88

No indication on which window it was dropped onto!

This must be a bug because it doesn't make sense not to have
any events for an event as crucial as knowing where something
has been dropped onto. Also, on the same point on earlier
releases i.e. 1.1.3 you got a mouse enter on unix machines
and a mouse move on windows 95 machines. Why were these different?

I find that event generated are changed on each new release
of java. The software (Triana) which I've written (see below)
is 82,000 lines of code which test every possible mouse
drag, move, click etc. scenario so I can check
immediately using this software for potential bugs in
mouse behaviour of new releases of java. Perhaps sun would
be interested in trying a new release out on me first
by coming to some kind of arrangement ? Just an idea.

all the best,

Ian

--
============================================================
= Dr Ian Taylor email : ###@###.### =
= Triana Home Page : http://www.astro.cf.ac.uk/Triana/ =
= Department of Physics and Astronomy, =
= University of Wales, College of Cardiff =
= Telephone : (01222) 874000 ext 5032 =
= Fax : (01222) 874056 =
============================================================

Test program:
----------

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import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class MouseEvents extends Frame implements MouseListener,
                                           MouseMotionListener {
    int mode;
    static int WITH_WIDGET = 0;

    public MouseEvents(int mode) {
        super("Window");
        setSize(300,300);

        addMouseListener(this);
        addMouseMotionListener(this);

        if (mode == WITH_WIDGET) {
            setLayout(new BorderLayout());
            add("Center", new SimplePanel());
            }
        }
 
    public void mouseMoved(MouseEvent e) {
        printEvent(e);
        }

    public void mouseDragged(MouseEvent e) {
        printEvent(e);
        }

    public void mouseClicked(MouseEvent e) {
        printEvent(e);
        }

    public void mouseEntered(MouseEvent e) {
        printEvent(e);
        }


    public void mouseExited(MouseEvent e) {
        printEvent(e);
        }
   
    public void mousePressed(MouseEvent e) {
       printEvent(e);
       }

    public void mouseReleased(MouseEvent e) {
       printEvent(e);
       }

    public static void printEvent(MouseEvent e) {
        Component source = e.getComponent();

        String type = "none";
  
        if (e.getID() == MouseEvent.MOUSE_PRESSED)
            type = "MOUSE_PRESSED";

        if (e.getID() == MouseEvent.MOUSE_CLICKED)
            type = "MOUSE_CLICKED";

        if (e.getID() == MouseEvent.MOUSE_RELEASED)
            type = "MOUSE_RELEASED";

        if (e.getID() == MouseEvent.MOUSE_MOVED)
            type = "MOUSE_MOVED";

        if (e.getID() == MouseEvent.MOUSE_ENTERED)
            type = "MOUSE_ENTERED";

        if (e.getID() == MouseEvent.MOUSE_ENTERED)
            type = "MOUSE_ENTERED";

        if (e.getID() == MouseEvent.MOUSE_EXITED)
            type = "MOUSE_EXITED";


        if (e.getID() == MouseEvent.MOUSE_DRAGGED)
            type = "MOUSE_DRAGGED";

        System.out.println(source.getName() + ": " + type + " " +
               e.getX() + " " + e.getY());

        }

    public static void main(String args[]) {
         MouseEvents m = new MouseEvents(MouseEvents.WITH_WIDGET);
         m.setLocation(500, 300);
         m.setVisible(true);
         MouseEvents t = new MouseEvents(MouseEvents.WITH_WIDGET+1);
         t.setLocation(200, 200);
         t.setVisible(true);
         }

   }



class SimplePanel extends Panel implements MouseListener,
                                           MouseMotionListener {

    public SimplePanel() {
        super();
        setName("Panel");
        addMouseListener(this);
        addMouseMotionListener(this);
        setSize(100, 100);
        setVisible(true);
        setBackground(Color.blue);
        }
       
    public void mouseMoved(MouseEvent e) {
        printEvent(e);
        }

    public void mouseDragged(MouseEvent e) {
        printEvent(e);
        }

    public void mouseClicked(MouseEvent e) {
        printEvent(e);
        }

    public void mouseEntered(MouseEvent e) {
        printEvent(e);
        }

    public void mouseExited(MouseEvent e) {
        printEvent(e);
        }
   
    public void mousePressed(MouseEvent e) {
       printEvent(e);
       }

    public void mouseReleased(MouseEvent e) {
        printEvent(e);
        }

    public static void printEvent(MouseEvent e) {
        MouseEvents.printEvent(e);
        }
    }
-- cut here -- cut here -- cut here -- cut here -- cut here -- cut here --
(Review ID: 30880)
======================================================================