Re: Fetching gtkmm custom css style properties

---------- Forwarded message ---------
From: Daniel Boles <[email protected]>
Date: Wed, 19 Feb 2020, 10:31
Subject: Re: Fetching gtkmm custom css style properties
To: Mohith Manoj <[email protected]>


Oh, sorry.

What you want is not Object.get_property but rather StyleContext.get, but
the latter is not wrapped in gtkmm yet.

So you would have to use C code, something like

auto opacity = double{};
gtk_style_context_get(styleContext->gobj(), styleContext->get_state(),
"opacity", &opacity, NULL);

you may need to cast the state too, but you get the idea i hope :-) this
can be hidden in a helper function, made into a template, etc.





On Wed, 19 Feb 2020, 10:24 Mohith Manoj via gtkmm-list, <
[email protected]> wrote:

> Sorry I felt a bit dumb at this point, so I though I'll try all
> combinations. Following code is executed on a button press from a custom
> widget derived from Gtk::ToggleButton.
>       int nValue;
>       Glib::RefPtr<Gtk::StyleContext> refStyleContext =
> get_style_context();
>
>       refStyleContext->get_property("color", nValue);
>       refStyleContext->get_property("css-color", nValue);
>
>       refStyleContext->get_style_property("color", nValue);
>       refStyleContext->get_style_property("css-color", nValue);
>
>       get_property("color", nValue);
>       get_property("css-color", nValue);
>
> All six lines threw warnings as below.
>
>
>
>
>
>
>
>
>
>
>
> *(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
> g_object_get_is_valid_property: object class 'GtkStyleContext' has no
> property named 'color'(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
> g_object_get_is_valid_property: object class 'GtkStyleContext' has no
> property named 'css-color'(TV_UI:21972): Gtk-WARNING **: 15:49:20.480:
> ../../../../gtk/gtkstylecontext.c:1796: widget class
> 'gtkmm__GtkToggleButton' has no style property named 'color'(TV_UI:21972):
> Gtk-WARNING **: 15:49:20.480: ../../../../gtk/gtkstylecontext.c:1796:
> widget class 'gtkmm__GtkToggleButton' has no style property named
> 'css-color'(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
> g_object_get_is_valid_property: object class 'gtkmm__GtkToggleButton' has
> no property named 'color'(TV_UI:21972): GLib-GObject-WARNING **:
> 15:49:20.480: g_object_get_is_valid_property: object class
> 'gtkmm__GtkToggleButton' has no property named 'css-color'*
>
>
>
>
>
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