GTKD - overrideBackgroundColor of Button doesn't work

[Gerald via Digitalmars-d-learn]

On Wednesday, 15 June 2016 at 21:39:37 UTC, TheDGuy wrote:
> On Wednesday, 15 June 2016 at 20:49:02 UTC, Gerald wrote:
>> On Wednesday, 15 June 2016 at 09:03:45 UTC, TheDGuy wrote:
>>> Hello,
>>> why does this code not work?
>>>
>>>         RGBA rgb = new RGBA(1,0.5,0.5,1.0);
>>>         Button btn_1 = new Button("Start");
>>>         btn_1.overrideBackgroundColor(StateFlags.NORMAL, rgb);
>>>
>>> The color of btn_1 just doesn't change.
>>
>> https://developer.gnome.org/gtk3/stable/GtkWidget.html#gtk-widget-override-background-color
>

snip...

> The text color is green but the button background color is 
> still default-gray!

I don't see an obvious issue with your code, I usually use CSS 
classes personally and I know that works fine because I use this 
technique all over terminix. I would suggest using the GTK 
Inspector to debug the CSS issue, it's an awesome tool for 
figuring out GTK CSS issues as it let's you change CSS on the 
fly, see what CSS is being applied to an object, etc. You can see 
how to use it at the link below:

https://wiki.gnome.org/Projects/GTK%2B/Inspector


> I am also wondering how it is possible to change the button 
> color at runtime? In my opinion i don't think that CSS-based 
> style has alot of advantages over the commonly used object 
> functions.

Personally I just add and remove classes as needed:

getStyleContext().addClass()
getStyleContext().removeClass()