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  4. How can I disable my Window 7 Desktop in Java

How can I disable my Window 7 Desktop in Java

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  • T TorstenH

    now you've heard so much things you CAN'T do. Here is what you can do: Make a pop up dialog that is top most. It will appear in front of all other applications and must be confirmed. You can also let that dialog play some annoying sound.

    regards Torsten I never finish anyth...

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    flashery
    wrote on last edited by
    #11

    Yeah that's right but you can access some window which is not its parent. What I want is a pop up dialog that will surely disabled all the access of the desktop except the pop up dialog itself. Can I do it in java?

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    • F flashery

      Yeah that's right but you can access some window which is not its parent. What I want is a pop up dialog that will surely disabled all the access of the desktop except the pop up dialog itself. Can I do it in java?

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      TorstenH
      wrote on last edited by
      #12

      you can't disable other applications - but the dialog will pop up in front of all applications and stay there. The user can work on other applications but has always the popup in sight. An alarm sound can be looped until the user acknowledges the alert. You can make it impossible to work with other applications if you make the dialog of the popup a bit bigger, but that's more annoying than useful.

      regards Torsten I never finish anyth...

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      • F flashery

        Yeah that's right but you can access some window which is not its parent. What I want is a pop up dialog that will surely disabled all the access of the desktop except the pop up dialog itself. Can I do it in java?

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        Lost User
        wrote on last edited by
        #13

        No! Windows is specifically designed so that the user is the one to make such decisions, not applications. Think of the havoc that would ensue if this was possible; every virus writer, hacker, and Q&A dummy would be releasing programs that blocked PC systems. You could, however, use the Windows ExitWindowsEx()[^] function, but that would mean writing some C code, and it would still be difficult to force the application to start without some form of service to control it.

        Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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        • T TorstenH

          you can't disable other applications - but the dialog will pop up in front of all applications and stay there. The user can work on other applications but has always the popup in sight. An alarm sound can be looped until the user acknowledges the alert. You can make it impossible to work with other applications if you make the dialog of the popup a bit bigger, but that's more annoying than useful.

          regards Torsten I never finish anyth...

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          flashery
          wrote on last edited by
          #14

          Yeah that's what I am afraid of using just pop up dialog. I think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window. I think it is much better? How was it?

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          • L Lost User

            No! Windows is specifically designed so that the user is the one to make such decisions, not applications. Think of the havoc that would ensue if this was possible; every virus writer, hacker, and Q&A dummy would be releasing programs that blocked PC systems. You could, however, use the Windows ExitWindowsEx()[^] function, but that would mean writing some C code, and it would still be difficult to force the application to start without some form of service to control it.

            Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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            flashery
            wrote on last edited by
            #15

            Yeah that's what I am afraid of using just pop up dialog. I think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window. I think it is much better? How is it?

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            • F flashery

              Yeah that's what I am afraid of using just pop up dialog. I think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window. I think it is much better? How is it?

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              Lost User
              wrote on last edited by
              #16

              I am not sure that you can disable some of the system key combinations in this way. I do think that you should forget Java as it is really not designed for this purpose when running on a Windows system. One of the basic rules of Windows is that the user is in charge, so it is quite difficult to find ways to override this.

              Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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              • L Lost User

                I am not sure that you can disable some of the system key combinations in this way. I do think that you should forget Java as it is really not designed for this purpose when running on a Windows system. One of the basic rules of Windows is that the user is in charge, so it is quite difficult to find ways to override this.

                Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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                flashery
                wrote on last edited by
                #17

                So as a conclusion I really need to convert in C++? I just want to sure before giving it a go..

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                • F flashery

                  So as a conclusion I really need to convert in C++? I just want to sure before giving it a go..

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                  Lost User
                  wrote on last edited by
                  #18

                  1. I do not think there is any way you can do this in Java. 2. There may be a way in C++ but no guarantees. You really need to ask yourself whether it is worth investing time and effort into this, or is there an easier (non-automatic) way to manage it.

                  Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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                  • L Lost User

                    1. I do not think there is any way you can do this in Java. 2. There may be a way in C++ but no guarantees. You really need to ask yourself whether it is worth investing time and effort into this, or is there an easier (non-automatic) way to manage it.

                    Unrequited desire is character building. OriginalGriff I'm sitting here giving you a standing ovation - Len Goodman

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                    flashery
                    wrote on last edited by
                    #19

                    Ok... I am really thankful of all your help guys. GOD BLESS YOU ALL.

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                    • F flashery

                      How can I disable my Window 7 Desktop in Java while showing some warning? I am making a Timer program in java and need to disable the desktop if the time is over and enable again if the admin allows it. I just want to know the keyword of disabling and enabling the desktop. Just like this To shutdown a PC = shutdown -s Any help is appreciated. :) :)

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                      LaxmikantYadav
                      wrote on last edited by
                      #20

                      You can use BlockInput() win32 API and call it in java using JNI. It will block the all input events of the system. :)

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                      • F flashery

                        Yeah that's what I am afraid of using just pop up dialog. I think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window. I think it is much better? How was it?

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                        TorstenH
                        wrote on last edited by
                        #21

                        you can't do more than that. You don't know the other applications and have no complete control over the OS. Why should the user not be allowed to use other applications? You're talking about a timer, what should the user do when the timer runs?

                        regards Torsten I never finish anyth...

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                        • L LaxmikantYadav

                          You can use BlockInput() win32 API and call it in java using JNI. It will block the all input events of the system. :)

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                          flashery
                          wrote on last edited by
                          #22

                          Wow let me try this solution.

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                          • L LaxmikantYadav

                            You can use BlockInput() win32 API and call it in java using JNI. It will block the all input events of the system. :)

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                            Peter_in_2780
                            wrote on last edited by
                            #23

                            Laxmikant_Yadav wrote:

                            It will block the all input events of the system.

                            MSDN says otherwise. Ctrl-Alt-Del still works, so the user could get into task manager and kill the blocking app. Peter

                            Software rusts. Simon Stephenson, ca 1994.

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                            • P Peter_in_2780

                              Laxmikant_Yadav wrote:

                              It will block the all input events of the system.

                              MSDN says otherwise. Ctrl-Alt-Del still works, so the user could get into task manager and kill the blocking app. Peter

                              Software rusts. Simon Stephenson, ca 1994.

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                              LaxmikantYadav
                              wrote on last edited by
                              #24

                              Thanks for sharing this.

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                              • F flashery

                                Yeah that's what I am afraid of using just pop up dialog. I think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window. I think it is much better? How was it?

                                J Offline
                                J Offline
                                jschell
                                wrote on last edited by
                                #25

                                flashery wrote:

                                think it much better if I am going to make full screen window with matching some keyboard disabled such as alt+tab, alt+escape and any other keyboard shortcut that will switch window to window.

                                And AGAIN...you need to research 'kiosk'. And AGAIN...you cannot do all of that in java. So your choices are 1. Research all of the problems and then implement solutions with the understanding that some of the implementation will not be in java. 2. Go forward knowing that you cannot accomplish that in java. And as such a full screen display is going to be good enough.

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