High DPI and Icons

Perdrix

I've got some Icons that I have created as 32x16 and 64x32 with intention of supporting High-DPI:

They are currently in files with names like

DarkColour-16.png and DarkColour-32.png

I think it's possible to create a QIcon object that would automatically choose the right file?

I want in my code to have e.g.

static inline const std::vector<QIcon>  icons {
            QIcon("qrc:///stacking/DarkColour-16.png"),
                etc...
        }

and have it pick up the higher res file "automagically".

Is that done with special (maybe different naming conventions)?

Christian Ehrlicher

@Perdrix said in High DPI and Icons:

and have it pick up the higher res file "automagically".

See QIcon::addFile()

DerReisende

@Perdrix you should name your files DarkColour.png and DarkColour@2x.png for the high-dpi version.

Perdrix

So for clarity, if I have the resources set up like this:

static inline const std::vector<QIcon>  icons {
            QIcon("qrc:///stacking/DarkColour.png"),  // 32 wide 16 high
            
                                etc...
        }

and I then set the display Icon for the row of the TableModel to icons[0], it will automatically load use the x2 version of the icon as it builds the vector? That seems to be what the addFile documentation suggests?

Is that right?

Thanks David

Perdrix

bump-a-t-bump

Christian Ehrlicher

@Perdrix said in High DPI and Icons:

Is that right?

If you don't trust the documentation simply try it out.

Perdrix

I'm not testing the documentation, I'm testing my understanding of what you told me...

I'm in the middle of a 20k + line change to some code that uses this ...

D.

Christian Ehrlicher

@Perdrix said in High DPI and Icons:

I'm in the middle of a 20k + line change to some code that uses this ...

A small example with ~20loc would have told your understanding is correct or not.