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Forum Update on Monday, May 27th 2025

Any Layout dissapear all widgets

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  • L LCorona

    @Chris-Kawa
    I dont used any layouts, simply put the widgets and table in the place I need, I planning not use layouts, but the scroll area dont work, and that forced me to use them.

    There are many steps to test how the things doing, I have another question then, once put the layout and if the effect is not the desired, I not found any matter of do a undo, then I simply must close the program without save and test again.

    How do a undo over the steps of set a layout, practically a wrong choice spoil all the ui design??

    Chris KawaC Online
    Chris KawaC Online
    Chris Kawa
    Lifetime Qt Champion
    wrote on last edited by
    #4

    @LCorona said in Any Layout dissapear all widgets:

    I dont used any layouts, simply put the widgets and table in the place I need

    Well that's not gonna work in any reasonable way if you want to scroll.

    How do a undo over the steps of set a layout

    Like with any other undo Ctrl+Z (or Edit -> Undo from the menu) is your best friend.
    If you want to remove a layout in designer there'a button that says "break layout" but it won't put the widgets back where they were before you used a layout on them.

    L 1 Reply Last reply
    5
    • Chris KawaC Chris Kawa

      @LCorona said in Any Layout dissapear all widgets:

      I dont used any layouts, simply put the widgets and table in the place I need

      Well that's not gonna work in any reasonable way if you want to scroll.

      How do a undo over the steps of set a layout

      Like with any other undo Ctrl+Z (or Edit -> Undo from the menu) is your best friend.
      If you want to remove a layout in designer there'a button that says "break layout" but it won't put the widgets back where they were before you used a layout on them.

      L Offline
      L Offline
      LCorona
      wrote on last edited by
      #5

      @Chris-Kawa
      Well, not work, the scroll bar not appear enabled, and all the widgets were resized to a size I dont know why system choose that size, the ui is complety useless now.

      Fortunately save a copy of directory and replace all project before the changes. Yes, Break Layout do the thing but change the position and geometry of widgets, Is too tired set about of 50 widgets again, better replace all project.

      Maybe I try to use the scrollbar control, Im almost done with scrollarea, simply dont work, and simply cant use layouts.

      mrjjM 1 Reply Last reply
      0
      • L LCorona

        @Chris-Kawa
        Well, not work, the scroll bar not appear enabled, and all the widgets were resized to a size I dont know why system choose that size, the ui is complety useless now.

        Fortunately save a copy of directory and replace all project before the changes. Yes, Break Layout do the thing but change the position and geometry of widgets, Is too tired set about of 50 widgets again, better replace all project.

        Maybe I try to use the scrollbar control, Im almost done with scrollarea, simply dont work, and simply cant use layouts.

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by mrjj
        #6

        @LCorona

        Hi
        Many of the widgets allow very tiny sizes.
        So instead of scrolling, the layout in the ScrollArea makes them smaller and smaller, the more you add.

        To fix that, you can use setMinimalHeight on the widgets so they don't become too small.

        You can, however, also use the scroll area with no layout if you set its scrollContent to some minimum sizes

        alt text

        Then you can have a fixed scroll enabled area where you can place the widgets totally free.

        alt text

        However, do note that this only works well if you not adding more and more during runtime.

        L 1 Reply Last reply
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        • mrjjM mrjj

          @LCorona

          Hi
          Many of the widgets allow very tiny sizes.
          So instead of scrolling, the layout in the ScrollArea makes them smaller and smaller, the more you add.

          To fix that, you can use setMinimalHeight on the widgets so they don't become too small.

          You can, however, also use the scroll area with no layout if you set its scrollContent to some minimum sizes

          alt text

          Then you can have a fixed scroll enabled area where you can place the widgets totally free.

          alt text

          However, do note that this only works well if you not adding more and more during runtime.

          L Offline
          L Offline
          LCorona
          wrote on last edited by
          #7

          @mrjj
          Ok, sounds good, but, wich minimal size put in widgets???, I dont know wich is the size in pixels of my widgets, I only want that mantains the current geometry. For example now the widgets have 951X51 width and height in geometry.

          Like a personal comment, I saw some that for me has no sense, geometry manage a relative size to app, and minimumSize manage size in pixels, In general i dont care much the real size, meanwhile the relation of size between all objects in app matains, the minimum size must be too in a relative manner.

          mrjjM 1 Reply Last reply
          0
          • L LCorona

            @mrjj
            Ok, sounds good, but, wich minimal size put in widgets???, I dont know wich is the size in pixels of my widgets, I only want that mantains the current geometry. For example now the widgets have 951X51 width and height in geometry.

            Like a personal comment, I saw some that for me has no sense, geometry manage a relative size to app, and minimumSize manage size in pixels, In general i dont care much the real size, meanwhile the relation of size between all objects in app matains, the minimum size must be too in a relative manner.

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by mrjj
            #8

            @LCorona

            Hi
            You can select all your widgets in the scrollarea. (make sure scroll area is not select or its scroll widget)
            Then use ( right click on any of the selected)
            alt text

            Which set the height to the height it has currently.

            L 1 Reply Last reply
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            • mrjjM mrjj

              @LCorona

              Hi
              You can select all your widgets in the scrollarea. (make sure scroll area is not select or its scroll widget)
              Then use ( right click on any of the selected)
              alt text

              Which set the height to the height it has currently.

              L Offline
              L Offline
              LCorona
              wrote on last edited by
              #9

              @mrjj
              Ok, I did. I really apreciate the help thank you. But the scrollbar appear disabled, there is not scrolling.

              I dont know what im doing wrong, Simply put a scroll area in the form, expand it and put inside all widgets in vertical manner, then again resize the scrollarea and form to a small size, many widgets are not visible now, set the mimimumheight like you show me, but the scrollbar still not working. :'(

              mrjjM 1 Reply Last reply
              0
              • L LCorona

                @mrjj
                Ok, I did. I really apreciate the help thank you. But the scrollbar appear disabled, there is not scrolling.

                I dont know what im doing wrong, Simply put a scroll area in the form, expand it and put inside all widgets in vertical manner, then again resize the scrollarea and form to a small size, many widgets are not visible now, set the mimimumheight like you show me, but the scrollbar still not working. :'(

                mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by mrjj
                #10

                @LCorona
                Hmm it sounds right.
                Mine can scroll even before i put widget in.

                But for you , the scrollbars are disabled ?

                alt text

                also, the scrollareawidgetcontents has small red symbol to show no layout assigned, right ?

                alt text

                L 1 Reply Last reply
                0
                • mrjjM mrjj

                  @LCorona
                  Hmm it sounds right.
                  Mine can scroll even before i put widget in.

                  But for you , the scrollbars are disabled ?

                  alt text

                  also, the scrollareawidgetcontents has small red symbol to show no layout assigned, right ?

                  alt text

                  L Offline
                  L Offline
                  LCorona
                  wrote on last edited by
                  #11

                  @mrjj
                  The scrollbars are not disabled, yes, there is a red icon on scrollareawidgetcontents.
                  Also the ui designer made someting weird, after set the minimumheight of widgets, if again resize the scrollarea to see the hiden widgets, now cant see anything, all widgets are invisible , one is a tablewiget that has a part hidden, this wiget appears cut, the remaining part appears invisible too.

                  weird.jpg

                  mrjjM 1 Reply Last reply
                  0
                  • L LCorona

                    @mrjj
                    The scrollbars are not disabled, yes, there is a red icon on scrollareawidgetcontents.
                    Also the ui designer made someting weird, after set the minimumheight of widgets, if again resize the scrollarea to see the hiden widgets, now cant see anything, all widgets are invisible , one is a tablewiget that has a part hidden, this wiget appears cut, the remaining part appears invisible too.

                    weird.jpg

                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #12

                    @LCorona
                    Hi
                    When we use ScrollArea without a layout we dont need to set any minimum on the widgets are they should just float
                    around where we place them and not alter position or size.

                    Did you have them in some layout or anything like that or is it just like 10 custom plots?

                    Im not sure what happened to it. Sorry it exploded.

                    Could you maybe paste the ui file to
                    https://paste.ofcode.org/

                    So i could try have a look ?

                    I assume its just a normal MainWindow UI with some widgets promoted to customplots ?

                    L 1 Reply Last reply
                    0
                    • L Offline
                      L Offline
                      LCorona
                      wrote on last edited by
                      #13

                      Maybe I forgot something very important, all the widgets inside scrollarea except the tablewiget are promoted (I dont know is this is consider as a custom widget), maybe this is caused the problems.

                      mrjjM 1 Reply Last reply
                      0
                      • L LCorona

                        Maybe I forgot something very important, all the widgets inside scrollarea except the tablewiget are promoted (I dont know is this is consider as a custom widget), maybe this is caused the problems.

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by mrjj
                        #14

                        @LCorona
                        Hi
                        I doubt that as i use promotion all the time and its just a clever trick from Creator.
                        Like a place holder so in Designer they are just plain Widgets but in the code generated
                        they are QCustomPlot types. ( well QCustomPlot is a custom widget )

                        Im not sure what could have caused this as it seems there is no layout so the widgets should not jump around at all.

                        Hence i wanted to see the inside of the UI file (its XML) and open in Designer to see if I can spot anything.

                        1 Reply Last reply
                        0
                        • mrjjM mrjj

                          @LCorona
                          Hi
                          When we use ScrollArea without a layout we dont need to set any minimum on the widgets are they should just float
                          around where we place them and not alter position or size.

                          Did you have them in some layout or anything like that or is it just like 10 custom plots?

                          Im not sure what happened to it. Sorry it exploded.

                          Could you maybe paste the ui file to
                          https://paste.ofcode.org/

                          So i could try have a look ?

                          I assume its just a normal MainWindow UI with some widgets promoted to customplots ?

                          L Offline
                          L Offline
                          LCorona
                          wrote on last edited by
                          #15

                          @mrjj
                          Sure, there is my code https://paste.ofcode.org/5HQYLEtKiY5jveeJhuF98b

                          The form have 48 promoted widgets of customPlot class, and a tablewiget, yes is a normal window

                          mrjjM 1 Reply Last reply
                          1
                          • L LCorona

                            @mrjj
                            Sure, there is my code https://paste.ofcode.org/5HQYLEtKiY5jveeJhuF98b

                            The form have 48 promoted widgets of customPlot class, and a tablewiget, yes is a normal window

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by mrjj
                            #16

                            @LCorona
                            Hi
                            Working fine.
                            Your TableWidget has a huge Height. That is on purpose ?

                            But your CustomPlots are just 51 in height ?
                            What was the plan for each.

                            I think i get design.
                            Table widget with one col to the side, very high so that it will follow all the customs plot down ?

                            But how big is the plan for each CustomPlot ?

                            51 pixels is kinda small but did you mean to have them this small ?

                            Update:
                            Found it
                            Your scrollAreaWidgetContents did nto have min size set .
                            if i set say 2000x 2000 it all works fine
                            alt text

                            alt text

                            Can i ask why you put them in manually instead of simply adding them using a loop since you want that many ?
                            (by loop i mean in code)

                            ps. i added col to tablewidget to to see if it was ok. and it was. it just look slightly odd with only one col.
                            (you can get col to strech whole table width if you want)

                            L 1 Reply Last reply
                            1
                            • mrjjM mrjj

                              @LCorona
                              Hi
                              Working fine.
                              Your TableWidget has a huge Height. That is on purpose ?

                              But your CustomPlots are just 51 in height ?
                              What was the plan for each.

                              I think i get design.
                              Table widget with one col to the side, very high so that it will follow all the customs plot down ?

                              But how big is the plan for each CustomPlot ?

                              51 pixels is kinda small but did you mean to have them this small ?

                              Update:
                              Found it
                              Your scrollAreaWidgetContents did nto have min size set .
                              if i set say 2000x 2000 it all works fine
                              alt text

                              alt text

                              Can i ask why you put them in manually instead of simply adding them using a loop since you want that many ?
                              (by loop i mean in code)

                              ps. i added col to tablewidget to to see if it was ok. and it was. it just look slightly odd with only one col.
                              (you can get col to strech whole table width if you want)

                              L Offline
                              L Offline
                              LCorona
                              wrote on last edited by
                              #17

                              @mrjj
                              I build a logic signal analizer, the tablewidget is for manage the channels leyends, put a colorpicker for the plot, and other controls, I choose a tablewidget because want a dragdrop functionality for channels and this widget already implemented.

                              Each customplot is for made a chart of digital signals, these customwidget is the only free thing I found for made a chart, in fact now I already draw successfully many digital signals.

                              Other customwidget is for made the timeline control.

                              The thing not work is the scrolling.

                              I put all the widgets in the form becasuse I read in forums that is not possible create a promote widgets programatically.

                              Wow, you found it!!!, I will test it.

                              mrjjM 1 Reply Last reply
                              0
                              • L LCorona

                                @mrjj
                                I build a logic signal analizer, the tablewidget is for manage the channels leyends, put a colorpicker for the plot, and other controls, I choose a tablewidget because want a dragdrop functionality for channels and this widget already implemented.

                                Each customplot is for made a chart of digital signals, these customwidget is the only free thing I found for made a chart, in fact now I already draw successfully many digital signals.

                                Other customwidget is for made the timeline control.

                                The thing not work is the scrolling.

                                I put all the widgets in the form becasuse I read in forums that is not possible create a promote widgets programatically.

                                Wow, you found it!!!, I will test it.

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

                                @LCorona
                                Ok, sounds fine.

                                The only thing to remember that the minimum size you set for
                                scrollAreaWidgetContents, is the max area where you can place other widgets. So if you hit the bottom, you must extend it.

                                Did you want each CustomPlot to be only 51 height?

                                L 1 Reply Last reply
                                0
                                • mrjjM mrjj

                                  @LCorona
                                  Ok, sounds fine.

                                  The only thing to remember that the minimum size you set for
                                  scrollAreaWidgetContents, is the max area where you can place other widgets. So if you hit the bottom, you must extend it.

                                  Did you want each CustomPlot to be only 51 height?

                                  L Offline
                                  L Offline
                                  LCorona
                                  wrote on last edited by
                                  #19

                                  @mrjj
                                  The only thing to remember that the minimum size you set for
                                  scrollAreaWidgetContents, is the max area where you can place other widgets. So if you hit the bottom, you must extend it. OK

                                  Did you want each CustomPlot to be only 51 height? Yes, for now is enough, basically, the interest in the signals are the times of the signal enter a flank, in fact, the plot is made only with binary numbers for Y axe, X axe is continuos in time.

                                  Here there is a view of some of generated plots with the actual code.

                                  analizer.jpg

                                  mrjjM 1 Reply Last reply
                                  1
                                  • L LCorona

                                    @mrjj
                                    The only thing to remember that the minimum size you set for
                                    scrollAreaWidgetContents, is the max area where you can place other widgets. So if you hit the bottom, you must extend it. OK

                                    Did you want each CustomPlot to be only 51 height? Yes, for now is enough, basically, the interest in the signals are the times of the signal enter a flank, in fact, the plot is made only with binary numbers for Y axe, X axe is continuos in time.

                                    Here there is a view of some of generated plots with the actual code.

                                    analizer.jpg

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

                                    @LCorona
                                    That's looks cool.

                                    Ok so all make sense.

                                    Does scrolling work for you now ?

                                    Your scrollabar dont look that big

                                    L 2 Replies Last reply
                                    1
                                    • mrjjM mrjj

                                      @LCorona
                                      That's looks cool.

                                      Ok so all make sense.

                                      Does scrolling work for you now ?

                                      Your scrollabar dont look that big

                                      L Offline
                                      L Offline
                                      LCorona
                                      wrote on last edited by
                                      #21

                                      @mrjj
                                      The scroll bar appears enabled but because I resize the scrollarea to a small size than the one had before set of the minimal size of widgets, but becone disabled again if set the size at original height, also not show the hidden wigets, Im not implemented the solution yet, I have to go for lunch, but I come back.

                                      1 Reply Last reply
                                      0
                                      • mrjjM mrjj

                                        @LCorona
                                        That's looks cool.

                                        Ok so all make sense.

                                        Does scrolling work for you now ?

                                        Your scrollabar dont look that big

                                        L Offline
                                        L Offline
                                        LCorona
                                        wrote on last edited by LCorona
                                        #22

                                        @mrjj
                                        Perfect, I already test it, works excellent!!!, you are awesome, problem resolved, Thank you.

                                        goodsignals.jpg

                                        1 Reply Last reply
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