Re: Fetching gtkmm custom css style properties

[Daniel Boles <dboles src gmail com>]

---------- Forwarded message ---------
From: Daniel Boles <dboles src gmail com>
Date: Wed, 19 Feb 2020, 10:31
Subject: Re: Fetching gtkmm custom css style properties
To: Mohith Manoj <mohith manoj skanray com>

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, <gtkmm-list gnome org> 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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