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  4. QPainter::setClipping(false) is not working(Qt 4.8)
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QPainter::setClipping(false) is not working(Qt 4.8)

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qwidgetqpainterclippingpaintevent
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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #2

    Hi,

    Do you mean you want to draw on the widget containing the push button from within the button ?

    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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    • A Offline
      A Offline
      arju.ach
      wrote on last edited by
      #3

      Yes. First I checked whether there is a way to disable clipping on widget directly in which case I could have contained a button and label inside a widget. But I dint find a way to do it directly. So I tried subclassing QPushButton and tried to draw text from inside paint event outside the bounds of button with clipping disabled using QPainter methods..

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      • dheerendraD Offline
        dheerendraD Offline
        dheerendra
        Qt Champions 2022
        wrote on last edited by dheerendra
        #4

        Is there a sample to show what you are doing ? Also if you show some image on what you wanted to achieve will also help.

        Dheerendra
        @Community Service
        Certified Qt Specialist
        http://www.pthinks.com

        A 1 Reply Last reply
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        • dheerendraD dheerendra

          Is there a sample to show what you are doing ? Also if you show some image on what you wanted to achieve will also help.

          A Offline
          A Offline
          arju.ach
          wrote on last edited by
          #5

          @dheerendra 0_1544862322913_Screen Shot 2018-12-15 at 1.54.34 PM.png
          Thanks.

          I am trying to do like attached image. At a time only one button can be focused and when it gets focused I want to show button's horizontal centre aligned action description below the button. The issue is description can come under another button also and can grow out of buttons bounds.

          aha_1980A 1 Reply Last reply
          0
          • A arju.ach

            @dheerendra 0_1544862322913_Screen Shot 2018-12-15 at 1.54.34 PM.png
            Thanks.

            I am trying to do like attached image. At a time only one button can be focused and when it gets focused I want to show button's horizontal centre aligned action description below the button. The issue is description can come under another button also and can grow out of buttons bounds.

            aha_1980A Offline
            aha_1980A Offline
            aha_1980
            Lifetime Qt Champion
            wrote on last edited by aha_1980
            #6

            @arju.ach Why don't you just use a QLabel in combination with a QVBoxLayout?

            Or arrange all widgets in a QGridLayout?

            Qt has to stay free or it will die.

            A 1 Reply Last reply
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            • dheerendraD Offline
              dheerendraD Offline
              dheerendra
              Qt Champions 2022
              wrote on last edited by
              #7

              You are slightly over engineering the task. You don't need the painting or subclassing. As @aha_1980 said, it can be managed with simple visual elements like QLabel & Layouts.

              Dheerendra
              @Community Service
              Certified Qt Specialist
              http://www.pthinks.com

              A 1 Reply Last reply
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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #8

                Out of curiosity, why it there a need for such a description ?

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

                A 1 Reply Last reply
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                • aha_1980A aha_1980

                  @arju.ach Why don't you just use a QLabel in combination with a QVBoxLayout?

                  Or arrange all widgets in a QGridLayout?

                  A Offline
                  A Offline
                  arju.ach
                  wrote on last edited by
                  #9

                  @aha_1980 said in QPainter::setClipping(false) is not working(Qt 4.8):

                  @arju.ach Why don't you just use a QLabel in combination with a QVBoxLayout?

                  Can you please explain how to do it?

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                  • dheerendraD dheerendra

                    You are slightly over engineering the task. You don't need the painting or subclassing. As @aha_1980 said, it can be managed with simple visual elements like QLabel & Layouts.

                    A Offline
                    A Offline
                    arju.ach
                    wrote on last edited by
                    #10

                    @dheerendra
                    Can you please explain how to do it? Also please note that all the buttons will be dynamic based on some backend response and also spacing between them can change in some scenarios. I tried even this. https://stackoverflow.com/questions/53785115/qpainter-ignores-clipping-inside-paintevent/53785991?noredirect=1#comment94442586_53785991

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                    • SGaistS SGaist

                      Out of curiosity, why it there a need for such a description ?

                      A Offline
                      A Offline
                      arju.ach
                      wrote on last edited by
                      #11

                      @SGaist It is the UX requirement , easiest thing was to put both icon and description inside button.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #12

                        You could have simple QLabel that you would move as need and from which you update the text when the buttons get their focus changed.

                        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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                        • A Offline
                          A Offline
                          arju.ach
                          wrote on last edited by arju.ach
                          #13

                          @SGaist Yes I tried that only. But first time when we switch into the view it doesn't appear properly. Btw button is inside horizontal layout. We kind of wanted to make it reusable since we have that in many places, so I subclassed QPushButton.

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #14

                            You can make a "container widget" that will handle the showing of the label properly.

                            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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