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Make a line break in a layout or container

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #13

    Are you already familiar with Qt's model view programming ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • E Offline
      E Offline
      EL-jos
      wrote on last edited by
      #14

      @mrjj said in Make a line break in a layout or container:

      You mean test of Qlabels ?

      no the test with a QTextEdit and an HTML subset to display an image as in the conversation given as an example above

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      • E Offline
        E Offline
        EL-jos
        wrote on last edited by
        #15

        @SGaist said in Make a line break in a layout or container:

        Are you already familiar with Qt's model view programming ?

        not just the basics too much

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by VRonin
          #16

          Then you should also take a look at @VRonin and @kshegunov's chat example project.

          [VRonin edited to proper attribute credit]

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • E Offline
            E Offline
            EL-jos
            wrote on last edited by
            #17

            @SGaist said in Make a line break in a layout or container:

            Then you should also take a look at @VRonin's chat example project.

            All right, I'll take a look later, since @mrjj is offering me a rather simple solution.

            mrjjM 1 Reply Last reply
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            • E EL-jos

              @SGaist said in Make a line break in a layout or container:

              Then you should also take a look at @VRonin's chat example project.

              All right, I'll take a look later, since @mrjj is offering me a rather simple solution.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by mrjj
              #18

              @EL-jos
              sorry but its not a good solution for a chat app :)
              Delegate would be much better. I was too quick to suggest QLabel/TextEdit.
              It will not scroll nice, very fast.

              Anyway, you can have images in Qlabel
              alt text

               label->setText("<html><head/><body><p>thi is the text that says heeelo hello</p><p><img src=\":/test.jpg\"/>and more hello</p></body></html>");
              

              Notice the syntax for the image
              ":/test.jpg"
              its in a resource file.

              There is an editor if you right click the QLabel on the form.
              alt text

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              • E Offline
                E Offline
                EL-jos
                wrote on last edited by
                #19

                Okay, thank you very much for your example.
                but why do you say a Delegate is much better?
                what are the advantages of the Delegate?
                and what are the disadvantages of rich text with HTML image?

                mrjjM 1 Reply Last reply
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                • E EL-jos

                  Okay, thank you very much for your example.
                  but why do you say a Delegate is much better?
                  what are the advantages of the Delegate?
                  and what are the disadvantages of rich text with HTML image?

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #20

                  @EL-jos
                  A Delegate is a custem draw for a ListView ( or any view)
                  So instead of drawing the normal cell, you make a small class where you use
                  QPainter to draw the cell how you want it.
                  Its much faster than having a tons of QLabels in a layout as
                  Views has been optimized for having many items.

                  so the clear benefit is that it works very fast and it can draw however you like.
                  (well you have to program that part)

                  Using html , you would have to construct the right html to have it look how u want.
                  Some thing be much harder. Like the clock/time in the whatapps sample.

                  With Delegate you can simply paint it there.

                  However, learning to use Views and Delegates will take some practice.

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                  • E Offline
                    E Offline
                    EL-jos
                    wrote on last edited by
                    #21

                    @mrjj said in Make a line break in a layout or container:

                    A Delegate is a custem draw for a ListView ( or any view)
                    So instead of drawing the normal cell, you make a small class where you use
                    QPainter to draw the cell how you want it.
                    Its much faster than having a tons of QLabels in a layout as
                    Views has been optimized for having many items.
                    so the clear benefit is that it works very fast and it can draw however you like.
                    (well you have to program that part)
                    Using html , you would have to construct the right html to have it look how u want.
                    Some thing be much harder. Like the clock/time in the whatapps sample.
                    With Delegate you can simply paint it there.
                    However, learning to use Views and Delegates will take some practice.

                    Thank you very much for the answer.
                    but can you give me a training link on the view and the delegate?

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                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #22

                      Did you took a look at the documentation I linked to earlier ? It does explain everything with examples.

                      There's the model view tutorial and the Item Views examples.

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • E Offline
                        E Offline
                        EL-jos
                        wrote on last edited by
                        #23

                        @SGaist said in Make a line break in a layout or container:

                        Did you took a look at the documentation I linked to earlier ? It does explain everything with examples.

                        Yeah, but it's a little complicated for me.

                        mrjjM 1 Reply Last reply
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                        • E EL-jos

                          @SGaist said in Make a line break in a layout or container:

                          Did you took a look at the documentation I linked to earlier ? It does explain everything with examples.

                          Yeah, but it's a little complicated for me.

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #24

                          @EL-jos
                          Hi
                          maybe this is easier to follow ?
                          https://www.bogotobogo.com/Qt/Qt5_QListView_QStringListModel_ModelView_MVC.php

                          Try to follow the steps and build the same.
                          It looks more complicated than it is.

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                          • E Offline
                            E Offline
                            EL-jos
                            wrote on last edited by
                            #25

                            @mrjj said in Make a line break in a layout or container:

                            Try to follow the steps and build the same.
                            It looks more complicated than it is.
                            All right, I'll take your advice, anyway, thank you for your answers and I can put the subject as resolved.

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