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Qt over game

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  • G Offline
    G Offline
    giesbert
    wrote on last edited by
    #2

    Hi Radek,

    I don't know what CryEngine2 does, but on windows, the top level Qt widget is a standard Window, so you can do everything with it, that you can do with a window. If the top level window is an OPenGL window, it will draw like OpenGL.

    Does that help you? Otherwise, I would suggest to make a small test for that.

    Nokia Certified Qt Specialist.
    Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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    • R Offline
      R Offline
      Radek
      wrote on last edited by
      #3

      Thanks for your answer Gerolf!

      Good to know it works with OPenGL, there is hope it can possibly draw over a DirectX renderer :)

      I will do a test and post the results ;)

      There is no problem, there are only solutions. :)

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      • D Offline
        D Offline
        DOBAZ
        wrote on last edited by
        #4

        Hello Radek and Gerolf,

        I have quite a similar application I need to develop. Is it possible to display a QT window on top of a Windows game that uses DirectX?

        Have you got any results Radek?

        Thanks

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        • R Offline
          R Offline
          Radek
          wrote on last edited by
          #5

          Hi Dobaz,

          Sorry, nothing so far, I just didn't have the time. I had to change my computer.
          There is hope I can test something soon, I just re-installed Qt on my new comp yesterday evening ;-)

          Can't wait to test the new Creator ^__^

          First step would be to grab the game's window handler to be able to paint over it (that's the way I'll begin testing).

          As I'm newbie in this matter I may be mistaken though.....will post as soon as I can.

          I'm still open for any advice/thoughts :)

          Good luck!

          There is no problem, there are only solutions. :)

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          • D Offline
            D Offline
            DOBAZ
            wrote on last edited by
            #6

            Radek,

            thanks for your reply. So now I'm eager too that you test your new Creator! I only found things on having DirectX inside a Qt window. Doesn't help much. If your test works, it would be awsome.

            If I find something else, I'll let you know.

            Good luck too!

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            • R Offline
              R Offline
              Radek
              wrote on last edited by
              #7

              ok!

              thanks man.

              Let's hope it turns out well ^__^

              There is no problem, there are only solutions. :)

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              • R Offline
                R Offline
                Radek
                wrote on last edited by
                #8

                Hi there!

                I tried a bit yesterday evening.... can't seem to be able to dock a widget to another app...

                Could anyone please enlighten me if one knows a way to do it....
                Should I play at WINAPI-level? I can get the HWND of the app I want to dock my widget into but what next? I can't get wy widget to show on another app, even if it's not a directx renderer.

                Should I use SetParent() and then a collection of other functions to adjust my app? (I don't feel it good :s ).

                Desperate thx :)

                Edit: Found something interresting: QWinMigrate, maybe it could help me, I just built the ".pro", excluding the MFC part as explained int the reame
                I'll try to achieve something tonight, stay tuned! :)

                There is no problem, there are only solutions. :)

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                • T Offline
                  T Offline
                  tomato
                  wrote on last edited by
                  #9

                  Hi Radek,

                  Just to share my experience of managing 3D windows in Qt : it is really not straight forward... I wanted to include an OpenGL window (core profile) managed by an other lib (SDL) as QWidget and finally gave up... 3D windows are really managed in a special way by OS, especially direct3D (compared to OGL which seems relatively well managed by Qt API).

                  So if you wanted a fast and working soution, may be your problem is "ill posed" or I misunderstood what you wanted...

                  Hope that someone more skillful than me could unjam you!

                  お前はもう死んでいる

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                  • R Offline
                    R Offline
                    Radek
                    wrote on last edited by
                    #10

                    Hi tomato,

                    Thanks for the reply.
                    You misunderstood my problem I think. I don't want to embed a D3D window in my QT app, but the other way. I want to display my app as if it was included in the D3D window. Somehow dock it into the game.
                    The purpose is to have a tool when you're in fullscreen mode, to avoid alt-tabbing.

                    I hope it's clearer this way. :-)

                    There is no problem, there are only solutions. :)

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                    • R Offline
                      R Offline
                      Radek
                      wrote on last edited by
                      #11

                      Time for a summary of how things are going so far....
                      BAD! :(((

                      Tomato, you understood well my problem in the first place.... yes I wanted a fast solution. And no it doesn't exist! -__-

                      After a gazillion hours of research on the internet, I finally (I'm a stubborn one :p ) came to the conclusion that it won't be easy game.

                      I might have found a guideline though.
                      For what I want to do (display something over a full-screen DirectX renderer), I need to go through DirectX itself, and use a technique known as hooking.... far from "piece of cake"!!! And then display an overlay on top of the game.
                      There are some available example apps that work like this: X-Fire, Steam, Mumble. The latter being opensource. (the overlay part of the source is scary!)

                      Being a stubborn-one(sorry for repeating myself), and for the sake of science and public common knowledge, I won't give up. =)

                      First stage will be to manage to use directX in QtCreator.

                      I'll keep posting for each stage I accomplish that seems important to me.

                      Now back to work.

                      There is no problem, there are only solutions. :)

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                      • D Offline
                        D Offline
                        DOBAZ
                        wrote on last edited by
                        #12

                        Hello Radek,

                        It's funny I just (few minute ago) got to the same conclusion. I called a Qt consultants and they're not able to help me on that one. So there's no way I will make it work by myself since I'm not as experienced.

                        The only solution is to go through DirectX. On my side though I am thinking of developing the whole thing in VS with DirectX and get some help with it because I know 0 about it. Not sure yet. Anyways thanks for the information, I will keep an eye on this thread to see how are things and even encourage you!

                        Good luck!

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                        • R Offline
                          R Offline
                          Radek
                          wrote on last edited by
                          #13

                          Hey Dobaz!

                          Thx for the encouragements, and good luck on your directx journey! May you find your way quickly! :-)

                          I've seen your thread on the forum, you can post updates too on your advancement, or some screenshot of your results if you have no time for writing ;)

                          I'm not in a hurry, so I can take the time to learn by myself (developping this for my pleasure).
                          Don't expect me to finish this in one week...there will be times with updates and times without a word, as the number of variables coming into account for my free time are numerous ;p

                          Cheers!

                          There is no problem, there are only solutions. :)

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                          • R Offline
                            R Offline
                            Radek
                            wrote on last edited by
                            #14

                            Hi folks!

                            Time for a little heads-up as I got awesome news! (I'm a little excited actually)

                            After some Internet digging I managed to implement a custom widget derived from QWidget that displays a DirectX renderer, built with QtCreator and MingW! Hoorray! :-p

                            This opens the path to victory as I now have the possibility to use DirectX. The DX version used is now DX9 as it assures the best compatibility (WinXP to 7).

                            More details this week-end when I have some time to write a longer post. =)

                            Stay tuned!

                            There is no problem, there are only solutions. :)

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                            • R Offline
                              R Offline
                              Remolus
                              wrote on last edited by
                              #15

                              Hi Radek,

                              have you got your Problem solved?
                              Cause i am nearly at the same problem.
                              I also want to create an overlay like the Steam (shift + tab) one for my controller Widget.
                              And it would be nice to have some example on that. :)

                              Level design begins where the rubber hits the road.

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                              • QT-static-prgmQ Offline
                                QT-static-prgmQ Offline
                                QT-static-prgm
                                wrote on last edited by
                                #16

                                Hi @Radek i know it's a little bit old this topic, but hopefully you found a solution and can share it with us. I'm currently working on an overlay, but it does not work to be painted over an fullscreen game

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