scale widget-based app

[m_andrej]

I have a widget-based desktop application, on which I need to make all items larger, because user will be somewhat further from computer screen. Is there a way to do this?

I searched the Internet and found that widgets scale themselves according to QScreen::devicePixelRatio(). However, I couldn't find out how to override its return value.

I'm using Qt 5.5.1.

[SGaist]

Hi,

What kind of application is it ?

[m_andrej]

It's application for recording passing times of participants in a sports tournament.

[m_andrej]

This post is deleted!

[mrjj]

@m_andrej said:

QScreen::devicePixelRatio()

Im not sure u can override it as such.

Its meant for support for higher res
screen which will be better supported in Qt 5.6.

Your use case sounds like you want to have a design where
all MUCH bigger than it normally would. ?

[m_andrej]

@mrjj said:

Your use case sounds like you want to have a design where
all MUCH bigger than it normally would. ?

I don't understand your question.

[mrjj]

ok. sorry if unclear.

Normally QScreen::devicePixelRatio() is used to scale the size of buttons etc
so on high res screens they do not become way to small.

It sounds to me that you are looking for a solution to scale whole GUI so its
much bigger than a normal desktop app would have it so they can be seen
from further away ?

[m_andrej]

Yes, I want to make the whole GUI approximately twice as big. Not just text, but also buttons etc.

If QScreen::devicePixelRatio() isn't the way to go, is it possible to adjust the size of controls by using Qt Style Sheets?

My UI isn't so rich, contains just a couple of repeating widgets (buttons, tab bar, line edits), so I could just add some code to style sheet for each control type.

[mrjj]

Ok. i understand.

Have you used layouts for the GUI?
So it already scales to mainwindow?

Also, must it support many different screen sizes/resolution or
you know before hand what the target screen will be ?

I think style sheet could work. However some controls might change the look when
you apply style sheet.

Could u show an image of the interface?
maybe a easy way was just to travel all Widgets and scale by some factor.

[m_andrej]

I did it with stylesheets like this:

QPushButton { 
min-height: 40px
}

[mrjj]

@m_andrej
Ok. very simple then. :)