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  1. JDK
  2. JDK-7130140

using horizontal scroll button on mouse causes a message to be printed on stdout

    Details

    • Subcomponent:
    • Resolved In Build:
      b25
    • CPU:
      x86
    • OS:
      linux_ubuntu
    • Verification:
      Verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.7.0_01"
        Java(TM) SE Runtime Environment (build 1.7.0_01-b08)
        Java HotSpot(TM) 64-Bit Server VM (build 21.1-b02, mixed mode)


        ADDITIONAL OS VERSION INFORMATION :
        Linux hp-elitebook 2.6.35-31-generic #63-Ubuntu SMP Mon Nov 28 19:29:10 UTC 2011 x86_64 GNU/Linux

        Ubuntu 10.10

        EXTRA RELEVANT SYSTEM CONFIGURATION :
        Mouse used:
        Microsoft IntelliMouse explorer 4.0 USB/PS2 compatible
        connected to the USB 3.0 port

        A DESCRIPTION OF THE PROBLEM :
        When using mouse scrolling button with 'horizontal scrolling' feature, a message is printed 2 times on the standard output every time, the horizontal scroll button is pressed.
        The message printed: "MEvent. CASE!"

        This seems to be the relevant code:
        jdk1.7.0_02/java/awt/event/MouseEvent.java
        line 761 in the
        public MouseEvent(Component source, int id, long when, int modifiers,
                              int x, int y, int xAbs, int yAbs,
                              int clickCount, boolean popupTrigger, int button)
        method:

        if (getModifiersEx() != 0) { //There is at least one more button in a pressed state.
                        if (id == MouseEvent.MOUSE_RELEASED || id == MouseEvent.MOUSE_CLICKED){
                            System.out.println("MEvent. CASE!");
                            shouldExcludeButtonFromExtModifiers = true;
                        }
                    }

        This was not an issue in older versions of JDK (at least in the 1.6.0.26)


        REGRESSION. Last worked in version 7

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        create a swing application and try to horizontal scroll above the window. Watch the standard output from the application

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        Nothing is printed on the standard output
        ACTUAL -
        message "MEvent. CASE!" is printed on the standard output 2x for each 'button press'

        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        import javax.swing.*;

        class Test extends JFrame {

            public static void main(String[] args) {
                Test test = new Test();
                test.setSize(200,200);
                test.setVisible(true);
                test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            }
        }

        ---------- END SOURCE ----------

        SUPPORT :
        YES

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                • Assignee:
                  denis Denis Fokin (Inactive)
                  Reporter:
                  webbuggrp Webbug Group
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                  • Created:
                    Updated:
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