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How to exchange data between qt and javascript?

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  • small_birdS Offline
    small_birdS Offline
    small_bird
    wrote on last edited by small_bird
    #1

    Hello everyone, my question is as the title.
    For example: how to transmit qimage object between qt and javascript?
    Could anyone tell me the reason? Thanks in advance!

    jsulmJ 1 Reply Last reply
    0
    • small_birdS small_bird

      Hello everyone, my question is as the title.
      For example: how to transmit qimage object between qt and javascript?
      Could anyone tell me the reason? Thanks in advance!

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @small_bird What exactly do you mean? Do you want exchange data between QML and C++? Or how are you using JavaScript?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      small_birdS 1 Reply Last reply
      1
      • jsulmJ jsulm

        @small_bird What exactly do you mean? Do you want exchange data between QML and C++? Or how are you using JavaScript?

        small_birdS Offline
        small_birdS Offline
        small_bird
        wrote on last edited by
        #3

        @jsulm No ,not qml and C++. It's qt and javascript.
        I try to use javascript to make 3d scene.

        jsulmJ 1 Reply Last reply
        0
        • small_birdS small_bird

          @jsulm No ,not qml and C++. It's qt and javascript.
          I try to use javascript to make 3d scene.

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #4

          @small_bird To me it's still unclear how you use JavaScript in your app.

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          small_birdS 1 Reply Last reply
          0
          • jsulmJ jsulm

            @small_bird To me it's still unclear how you use JavaScript in your app.

            small_birdS Offline
            small_birdS Offline
            small_bird
            wrote on last edited by small_bird
            #5

            @jsulm Do you know three.js? I try to use that engine.

            jsulmJ 1 Reply Last reply
            0
            • small_birdS small_bird

              @jsulm Do you know three.js? I try to use that engine.

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #6

              @small_bird But how? You're using C++/Qt and JavaScript, right?

              https://forum.qt.io/topic/113070/qt-code-of-conduct

              small_birdS 2 Replies Last reply
              0
              • jsulmJ jsulm

                @small_bird But how? You're using C++/Qt and JavaScript, right?

                small_birdS Offline
                small_birdS Offline
                small_bird
                wrote on last edited by
                #7

                @jsulm yes

                1 Reply Last reply
                0
                • jsulmJ jsulm

                  @small_bird But how? You're using C++/Qt and JavaScript, right?

                  small_birdS Offline
                  small_birdS Offline
                  small_bird
                  wrote on last edited by
                  #8

                  @jsulm So I need to transmit data between qt and javascript. How to do that? Through signal and slot mechanism.

                  jsulmJ 1 Reply Last reply
                  0
                  • small_birdS small_bird

                    @jsulm So I need to transmit data between qt and javascript. How to do that? Through signal and slot mechanism.

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #9

                    @small_bird I have no idea as long as you do not tell us how you're using JavaScript in your C++ app!

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    small_birdS 2 Replies Last reply
                    0
                    • jsulmJ jsulm

                      @small_bird I have no idea as long as you do not tell us how you're using JavaScript in your C++ app!

                      small_birdS Offline
                      small_birdS Offline
                      small_bird
                      wrote on last edited by
                      #10

                      @jsulm Actually, it is not c++. It is QML and javascript.

                      jsulmJ 1 Reply Last reply
                      0
                      • small_birdS small_bird

                        @jsulm Actually, it is not c++. It is QML and javascript.

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #11

                        @small_bird Good to know. I already asked you whether you're using QML you said no...
                        If you're using QML without C++ then I'm wondering how you can use QImage as you asked before?
                        Take a look at http://doc.qt.io/qt-5/qtqml-javascript-topic.html

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        1 Reply Last reply
                        1
                        • jsulmJ jsulm

                          @small_bird I have no idea as long as you do not tell us how you're using JavaScript in your C++ app!

                          small_birdS Offline
                          small_birdS Offline
                          small_bird
                          wrote on last edited by
                          #12

                          @jsulm However, now, I want to exchange data between C++ and javascript.

                          jsulmJ 1 Reply Last reply
                          0
                          • small_birdS small_bird

                            @jsulm However, now, I want to exchange data between C++ and javascript.

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #13

                            @small_bird Then exchange it between C++ and QML (check Qt documentation for this) and from QML then to JavaScript.
                            Or do you want to remove QML completely?

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

                            small_birdS 1 Reply Last reply
                            0
                            • jsulmJ jsulm

                              @small_bird Then exchange it between C++ and QML (check Qt documentation for this) and from QML then to JavaScript.
                              Or do you want to remove QML completely?

                              small_birdS Offline
                              small_birdS Offline
                              small_bird
                              wrote on last edited by
                              #14

                              @jsulm yes I have done that. But how to exchange qimage from qml to javascript?

                              jsulmJ 1 Reply Last reply
                              0
                              • small_birdS small_bird

                                @jsulm yes I have done that. But how to exchange qimage from qml to javascript?

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by
                                #15

                                @small_bird I don't know I would say it depends on that JavaScript three.js framework. Check it's API and data types.

                                https://forum.qt.io/topic/113070/qt-code-of-conduct

                                small_birdS 2 Replies Last reply
                                0
                                • jsulmJ jsulm

                                  @small_bird I don't know I would say it depends on that JavaScript three.js framework. Check it's API and data types.

                                  small_birdS Offline
                                  small_birdS Offline
                                  small_bird
                                  wrote on last edited by
                                  #16

                                  @jsulm No, the javascript's grammar is the same with three.js engine.

                                  jsulmJ 1 Reply Last reply
                                  0
                                  • small_birdS small_bird

                                    @jsulm No, the javascript's grammar is the same with three.js engine.

                                    jsulmJ Offline
                                    jsulmJ Offline
                                    jsulm
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #17

                                    @small_bird What do you mean by "grammar" and "engine"? three.js is a 3D JavaScript framework/library, right? So you need to check its documentation if you want to use it.

                                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                                    1 Reply Last reply
                                    0
                                    • jsulmJ jsulm

                                      @small_bird I don't know I would say it depends on that JavaScript three.js framework. Check it's API and data types.

                                      small_birdS Offline
                                      small_birdS Offline
                                      small_bird
                                      wrote on last edited by small_bird
                                      #18

                                      Yes, that's it. I have checked that, but how to transmit qimage data between qml and js function as it is not a inner type?

                                      jsulmJ 1 Reply Last reply
                                      0
                                      • small_birdS small_bird

                                        Yes, that's it. I have checked that, but how to transmit qimage data between qml and js function as it is not a inner type?

                                        jsulmJ Offline
                                        jsulmJ Offline
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #19

                                        @small_bird said in How to exchange data between qt and javascript?:

                                        That's three.js engine is written by javascript.

                                        Sure it is. That's not the point. It has an API, right? See its documentation: https://threejs.org/docs/index.html#manual/introduction/Creating-a-scene

                                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                                        1 Reply Last reply
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