Change the default font size of TextView without css

Platform
1

I want to change the default font size of TextView, i use the following code to achieve this.

provider = gtk_css_provider_new ();
gtk_css_provider_load_from_string (provider,
                                 "textview {"
                                 " font-size: 22px;"
                                 "}");
 context = gtk_widget_get_style_context (text_view);
 gtk_style_context_add_provider (context,
                                GTK_STYLE_PROVIDER (provider),
                                GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);

It works fine, however, when i compile it, the compiler warns me that
ā€˜gtk_widget_get_style_contextā€™ and ā€˜gtk_style_context_add_providerā€™ have been deprecated. I donā€™t know why gtk delete the function so fast even it appears in official gtk4 document.
I know maybe it can been achieved by using css file, but is it possible to achieve it without css?

2

I think only setting the provider globally is supported now. Try using gtk_style_context_add_provider_for_display instead.

3

Only setting a provider on the style context of a widget has been deprecated, because it does not work like people expect it toā€”the style rules do not cascade into the children of a widget.

If you want to load custom style rules, you should always use gtk_style_context_add_provider_for_display(), which has not been deprecated.

They are not ā€œdeletedā€: theyā€™ll continue to be available until GTK4 is EOL, which will happen when GTK6 is releasedā€”and we havenā€™t even started working on GTK5 at the moment.

The deprecation warnings are there to help during the port across major versions of GTK; if you know youā€™re using deprecated functions, you can easily disable the warnings until you want to port your code away from them.

You can create a text tag with its own font description, and apply it to the whole content of the text buffer.

1 Like
4

Thank you for replying, I have successfully solved this problem. :grinning: