Changing the opacity of the Dialogue box with a Slider

[Yuvan raj]

Hello, Guys! I'm a renpy noob and I'm working on changing the textbox with the help of a slider in the preference screen. I saw a code for it in a blog and copied it and pasted it. And now I can see a slider in the preference screen but when I move the thumb the opacity is not changing.

This code anywhere on the option.rpy

define persistent.dialogueBoxOpacity = 1.0

This code on the preference screen

label _("Dialogue box opacity")
bar value FieldValue(persistent, "dialogueBoxOpacity", range=1.0, style="slider")

And finally, this code under the say screen

window background Transform(Frame("gui/textbox.png",xalign=0.5, yalign=1.0), alpha=persistent.dialogueBoxOpacity)

This is the blog from where I got this code and anyone new can visit this and copy the code and hopefully the answers here also make this code work. https://www.emolgatorium.com/blog/how-d ... -in-renpy/

Thank you!

[cheonbyeol]

My first guess is that you define the variable rather than defaulting it, so Ren'Py is not updating it

[zmook]

That looks like it should work. To try to see why it's not, set

Code: Select all

    define config.developer = True

then restart your game and press shift-O to open the console.
enter

Code: Select all

> persistent.dialogueBoxOpacity

and see if the value is getting changed by your bar slider.

[zmook]

Your error does appear to be using `define` instead of `default` to declare your variable. I'm a little surprised, since I was under the impression that renpy didn't actually enforce that 'defined' variables could not be changed.

Is there something in renpy.store that does in fact mark 'defined' variable as constant? I can't find any real documentation of how renpy.store works.

[hell_oh_world]

Code: Select all

background Transform(Frame("gui/textbox.png",xalign=0.5, yalign=1.0), alpha=persistent.dialogueBoxOpacity)

if this is set in the `style window` inside `screens.rpy` then it won't since this only gets executed once (when the style is being defined during init).
you have to do it inside the `say` screen in `screens.rpy` not in the style.
so find that screen and in the `window` with `id 'window'`, add `background Transform(Frame("gui/textbox.png",xalign=0.5, yalign=1.0), alpha=persistent.dialogueBoxOpacity)`.
Also, its a common practice to use `default` statements on `persistent` variables.

[Yuvan raj]

That looks like it should work. To try to see why it's not, set

Code: Select all

    define config.developer = True

then restart your game and press shift-O to open the console.
enter

Code: Select all

> persistent.dialogueBoxOpacity

and see if the value is getting changed by your bar slider.

Thank you for the reply. I just found out that the opacity does changes but the lowest opacity didn't make it invisible.

[Yuvan raj]

Code: Select all

background Transform(Frame("gui/textbox.png",xalign=0.5, yalign=1.0), alpha=persistent.dialogueBoxOpacity)

if this is set in the `style window` inside `screens.rpy` then it won't since this only gets executed once (when the style is being defined during init).
you have to do it inside the `say` screen in `screens.rpy` not in the style.
so find that screen and in the `window` with `id 'window'`, add `background Transform(Frame("gui/textbox.png",xalign=0.5, yalign=1.0), alpha=persistent.dialogueBoxOpacity)`.
Also, its a common practice to use `default` statements on `persistent` variables.

Thank you for replying! It was already working, and I didn't notice it as the lowest value didn't make it fully transparent but just a little bit.

[Yuvan raj]

My first guess is that you define the variable rather than defaulting it, so Ren'Py is not updating it

Thank you so much for the reply! Both works I but it won't become fully transparent so I didn't notice it before.

[hell_oh_world]

for the `alpha` property `0.0` means transparent, while `1.0` is opaque. So the `alpha` actually only takes values between `0.0` and `1.0`.
Also, no need to spam the same message to everyone who answered your question.