CODEWITHSUNDEEP
c++linuxwindowsmacosqt
Denny Vavalà
Denny Vavalà

Reputation: 61

Different layout between Mac and Windows/Linux (same *.ui files)

I'm deploying my application with Qt Framework. The behaviour of layout is equal in Windows and Linux; and if I resize the windows the layout adapts. This doesn't happen in Mac OS. To develop for Mac, I'm using a virtual machine (the resolution is 1024x768), but, when I try to start my bundle in a "true" Mac (resolution's biggest) the result is terrible!

I put some pictures:

MAC - virtual machine (1024x768) - First tab (OK)

MAC - virtual machine (1024x768) - First tab (OK)

MAC - virtual machine (1024x768) - Second tab (Not OK)**

MAC - virtual machine (1024x768) - Second tab (Not OK)

**The second tab "Rubrica Contatti" is designed like the first tab "Ricettario". In designer the second tab seems ok, at runtime no!

I have tried to create a new project for test. I've set the Central Widget with Form Layout. I've created 2 Widgets that contain these items (each widget has a Grid Layout):

All these three items are clustered in vertical layout. I put the left widget in QSizePolicy::Minimum and the right one in QSizePolicy::Preferred. In Qt Designer the left panel is smaller and the right one is horizontally enlarged. When I start the app, both widget have the same width and are in the center of the window.

Note:
When I open any project, I get this text in "General Messages" . 

Warnings while parsing QML type information of /Users/denny/Qt/5.5/clang_64/qml:  
<dump of /Users/denny/Qt/5.5/clang_64/qml>:1:24: Reading only version 1.1 parts.  
<dump of /Users/denny/Qt/5.5/clang_64/qml>:10:5: Expected only Component and ModuleApi objects definitions.

Could it be the cause?

Upvotes: 2

Views: 1331

Answers (3)

Sergey
Sergey

Reputation: 21

It happens because, different styles use different expanding policies. For example the QFormLayout deals with enum QFormLayout::FieldGrowthPolicy.

QFormLayout::FieldsStayAtSizeHint - This is the default for QMacStyle.

QFormLayout::AllNonFixedFieldsGrow - This is the default policy for most styles.

QFormLayout::ExpandingFieldsGrow - This is the default policy for Plastique.

Upvotes: 1

Denny Vaval&#224;
Denny Vaval&#224;

Reputation: 61

The problem remains, but it solved so (for now)... 

QApplication::setStyle("fusion");

My app won't use Mac Themes, but it will use Fusion Theme...

Note:
The graphic is uglier, but it works!

Upvotes: 3

UmNyobe
UmNyobe

Reputation: 22910

  • For the panel on the left, set the horizontal size policies to QSizePolicy::Minimum. It means this widget can be larger but there is no point expanding it.
  • For the panel on the right, set the horizontal size policies to QSizePolicy::Preferred. It means if there is space to grow further use it.

Put the left panel widget in a single widget, the right panel widgets in another widget, and use a form layout. The form layout usually set the right size policies for left and right.

Upvotes: 0

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