Re: [Interest] Widget cross-platform (minimum) size constraint problem.
Hi Tony, You make a valid point. Originally the idea was to allow for scrollbars, but since that comes with an entirely different set of issues (as soon as the scrollbar appears, it cramps the style of the remaining widgets...i.e. when the horizontal scrollbar is created, it actually uses some of the available vertical space and overlaps some of the widgets in the scroll area...I hope that makes sense). I'll try using a standard QWidget as parent (as opposed to the QScrollArea) and see how that pans out. I also realise that there are no guarantees regarding the look of the Qt widgets on different platforms. What I actually wanted to find out is if there was a way to design a widget in Qt Designer so that the way it looks in Designer will be the way it is created at run-time? (i.e. if I tweak it on Windows and run it on Windows, it should look fine on Windows...if I subsequently go tweak it on Linux and run it on Linux, it should look fine on Linux). My problem is that, so far, it seems setting min values is a hit and miss operation - tweak value, compile, run, see what it looks like, realise it's too big/small, tweak value, compile, etc etc. Thanks for the input! William On Wed, Jan 2, 2013 at 9:13 AM, Tony Rietwyk t...@rightsoft.com.au wrote: Hi, ** ** The short answer is NO - Qt does not guarantee that designer created layouts look identical on all platforms. Especially on Mac where the minimum sizes are much larger due to the larger default font size and layout margins. The same widget type will have different default minimum sizes depending on the platform and desktop style. ** ** It's not clear to me why you have put the groups in a scroll area, if you don't want scroll bars to be shown. If you drag the layout into a normal dialog or main window, then the minimum sizes that you have set should be respected, and the group boxes should grow if you have allowed that. ** ** Tony. ** ** ** ** ** ** *From:* interest-bounces+tony=rightsoft.com...@qt-project.org [mailto: interest-bounces+tony=rightsoft.com...@qt-project.org] *On Behalf Of *Goblin Coding *Sent:* Wednesday, 2 January 2013 5:13 PM *To:* interest@qt-project.org *Subject:* [Interest] Widget cross-platform (minimum) size constraint problem. ** ** Hi All, First of all, I have had a look at the documentation, I’ve tried various combinations of setting minimum sizes, different size policies, calling updateGeometry() and adjustSize(), I’ve searched the forum for “qwidget minimum size” and others, I’ve asked Google…and I’m still stuck. *Background* I have a widget deriving from QScrollArea. This widget is populated with a bunch of QGroupBox’es in a horizontal layout (the main layout for the widget). Each QGroupBox contains buttons and/or other standard Qt widgets and all of them have layouts assigned to them and their content. *The problem* On Windows, I manage to ensure that the widget is created with the minimum size required to display the content WITHOUT having to show any scroll bars by setting the minimumSize property (using QtCreator and designer) and setting both the horizontal and vertical size policies to “Fixed”. This works just fine. However, compiling the same code on Ubuntu (12.04 LTS), the widget is displayed with the horizontal scroll bar showing at start-up. Now, I can obviously sort that out (for Ubuntu) by playing around with the minimum size settings, but that kind of defeats the point of “code once, deploy everywhere”. *The question* Is there a way to ensure that what I see in designer is what I get? In case this is not clear: is there a way to ensure that the widget, when set on a parent widget or window, will look *exactly* like it does when viewed in designer? *Qt details:* QtCreator 2.4.1 based on Qt 4.7.4 (32 bit) Thanks for your help! ** ** ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Widget cross-platform (minimum) size constraint problem.
On Wednesday 02 January 2013 10:46:24 Goblin Coding wrote: Hi Tony, You make a valid point. Originally the idea was to allow for scrollbars, but since that comes with an entirely different set of issues (as soon as the scrollbar appears, it cramps the style of the remaining widgets...i.e. when the horizontal scrollbar is created, it actually uses some of the available vertical space and overlaps some of the widgets in the scroll area...I hope that makes sense). I'll try using a standard QWidget as parent (as opposed to the QScrollArea) and see how that pans out. I also realise that there are no guarantees regarding the look of the Qt widgets on different platforms. What I actually wanted to find out is if there was a way to design a widget in Qt Designer so that the way it looks in Designer will be the way it is created at run-time? (i.e. if I tweak it on Windows and run it on Windows, it should look fine on Windows...if I subsequently go tweak it on Linux and run it on Linux, it should look fine on Linux). My problem is that, so far, it seems setting min values is a hit and miss operation - tweak value, compile, run, see what it looks like, realise it's too big/small, tweak value, compile, etc etc. What you would need is a 'getMinRequiredSize' method ... I whish this would exist - as it would allow for choosing different layouts according to the available space, i.e. to create specialized layout managers. Currently calculating the expected size _BEFORE_ showing a widget is really expensive ... Frank ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Widget cross-platform (minimum) size constraint problem.
On 01/02/2013 12:07 PM, Frank Hemer wrote: On Wednesday 02 January 2013 10:46:24 Goblin Coding wrote: Hi Tony, You make a valid point. Originally the idea was to allow for scrollbars, but since that comes with an entirely different set of issues (as soon as the scrollbar appears, it cramps the style of the remaining widgets...i.e. when the horizontal scrollbar is created, it actually uses some of the available vertical space and overlaps some of the widgets in the scroll area...I hope that makes sense). I'll try using a standard QWidget as parent (as opposed to the QScrollArea) and see how that pans out. I also realise that there are no guarantees regarding the look of the Qt widgets on different platforms. What I actually wanted to find out is if there was a way to design a widget in Qt Designer so that the way it looks in Designer will be the way it is created at run-time? (i.e. if I tweak it on Windows and run it on Windows, it should look fine on Windows...if I subsequently go tweak it on Linux and run it on Linux, it should look fine on Linux). My problem is that, so far, it seems setting min values is a hit and miss operation - tweak value, compile, run, see what it looks like, realise it's too big/small, tweak value, compile, etc etc. What you would need is a 'getMinRequiredSize' method ... I whish this would exist - as it would allow for choosing different layouts according to the available space, i.e. to create specialized layout managers. Currently calculating the expected size _BEFORE_ showing a widget is really expensive ... +1 Frank ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Widget cross-platform (minimum) size constraint problem.
On quarta-feira, 2 de janeiro de 2013 10.46.24, Goblin Coding wrote: I also realise that there are no guarantees regarding the look of the Qt widgets on different platforms. What I actually wanted to find out is if there was a way to design a widget in Qt Designer so that the way it looks in Designer will be the way it is created at run-time? (i.e. if I tweak it on Windows and run it on Windows, it should look fine on Windows...if I subsequently go tweak it on Linux and run it on Linux, it should look fine on Linux). My problem is that, so far, it seems setting min values is a hit and miss operation - tweak value, compile, run, see what it looks like, realise it's too big/small, tweak value, compile, etc etc. That still doesn't exist on Linux due to different font sizes, DPI settings and general widget styles varying between users. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center signature.asc Description: This is a digitally signed message part. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Widget cross-platform (minimum) size constraint problem.
Hi, The short answer is NO - Qt does not guarantee that designer created layouts look identical on all platforms. Especially on Mac where the minimum sizes are much larger due to the larger default font size and layout margins. The same widget type will have different default minimum sizes depending on the platform and desktop style. It's not clear to me why you have put the groups in a scroll area, if you don't want scroll bars to be shown. If you drag the layout into a normal dialog or main window, then the minimum sizes that you have set should be respected, and the group boxes should grow if you have allowed that. Tony. From: interest-bounces+tony=rightsoft.com...@qt-project.org [mailto:interest-bounces+tony=rightsoft.com...@qt-project.org] On Behalf Of Goblin Coding Sent: Wednesday, 2 January 2013 5:13 PM To: interest@qt-project.org Subject: [Interest] Widget cross-platform (minimum) size constraint problem. Hi All, First of all, I have had a look at the documentation, I've tried various combinations of setting minimum sizes, different size policies, calling updateGeometry() and adjustSize(), I've searched the forum for qwidget minimum size and others, I've asked Google.and I'm still stuck. Background I have a widget deriving from QScrollArea. This widget is populated with a bunch of QGroupBox'es in a horizontal layout (the main layout for the widget). Each QGroupBox contains buttons and/or other standard Qt widgets and all of them have layouts assigned to them and their content. The problem On Windows, I manage to ensure that the widget is created with the minimum size required to display the content WITHOUT having to show any scroll bars by setting the minimumSize property (using QtCreator and designer) and setting both the horizontal and vertical size policies to Fixed. This works just fine. However, compiling the same code on Ubuntu (12.04 LTS), the widget is displayed with the horizontal scroll bar showing at start-up. Now, I can obviously sort that out (for Ubuntu) by playing around with the minimum size settings, but that kind of defeats the point of code once, deploy everywhere. The question Is there a way to ensure that what I see in designer is what I get? In case this is not clear: is there a way to ensure that the widget, when set on a parent widget or window, will look exactly like it does when viewed in designer? Qt details: QtCreator 2.4.1 based on Qt 4.7.4 (32 bit) Thanks for your help! ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
