[solved] How to get the volume of an audio channel as a value to use in a screen

[Imperf3kt]

I'm trying to get the volume of the music, sound and voice channels as text in my screen, but I'm not sure how.
Currently I have this:

Code: Select all

default mus_vol = _preferences.get_volume("music")

            if config.has_music:
                label _("Music Volume")

                vbox:
                    bar value Preference("music volume") tooltip _("Change the music volume")
                    text _("[mus_vol]%")

This works and places the value as text on the screen (see image below), but it doesn't update when I adjust the slider (even after restarting the game) and it also displays it as 1.0 instead of a percentage (100)
I've also tried using python substitution

Code: Select all

default mus_vol = _preferences.get_volume("music")

            if config.has_music:
                label _("Music Volume")

                vbox:
                    bar value Preference("music volume") tooltip _("Change the music volume")
                    text _("%s") %mus_vol

but this just gives me the same results (except using this method I cannot work out how to add a percent symbol at the end of the text)


How can I get this as a value that I can use and convert it to a 100, 99, 98, etc instead of 1.0, 0.99, 0.98 etc.

[SypherZent]

I'm actually happy to finally be able to help you with something, since you've helped me so many times in the past Imperf3kt.

The problem you're experiencing is happening because Ren'Py will not automatically update values defined with "default" within a screen unless they are being modified by screen actions such as SetScreenVariable, ToggleScreenVariable, etc.

There are 2 possible solutions:

1) Use "$" instead of "default":

Code: Select all

$ mus_vol = _preferences.get_volume("music")

            if config.has_music:
                label _("Music Volume")

                vbox:
                    bar value Preference("music volume") tooltip _("Change the music volume")
                    text _("[mus_vol]%")

2) Call the value directly from text:

Code: Select all

            if config.has_music:
                label _("Music Volume")

                vbox:
                    bar value Preference("music volume") tooltip _("Change the music volume")
                    text _(str(_preferences.get_volume("music")))

Note that you can also create a custom function that returns the value configured to display as a percentage, instead of calling _preferences.get_volume("music") from the screen itself. Something like this:

Code: Select all

$ mus_vol = Get_Music_Volume("music")

            if config.has_music:
                label _("Music Volume")

                vbox:
                    bar value Preference("music volume") tooltip _("Change the music volume")
                    text _("[mus_vol]%")

Where "Get_Music_Volume" is a function you have defined somewhere else that returns _preferences.get_volume("music") as a percentage and string.

Also note, it's best to use str(val) than "[val]" in this case, as the variable is not being handled by "default" anymore.


Hope this helps. ^^

[RicharDann]

You can also use .format() interpolation to convert and display the value, like this:

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# Use str.format to interpolate the result of mus_vol * 100, with no decimal places this gives you the rounded percent 
text _( "{:.0f}%".format(mus_vol * 100) ) 

[Imperf3kt]

Perfect, thanks.
I was trying to make a function, but forgot how, so these suggestions help a lot.
I used a python block instead of $ though.

I'm actually happy to finally be able to help you with something, since you've helped me so many times in the past Imperf3kt.

I'm glad I was able to help out and thank you in return

One small issue that I'm not sure what's causing it, is when I duplicate it for sound and voice, voice works and displays a percentage, but sound just shows 0% no matter where the bar is set.
https://i.imgur.com/lK19moq.png
Will need to look into this further.

It seems that the sound channel isn't called "sound", but "sfx".