Receiving notification of theme changes or changes to syntax highlighting properties

How can you receive notification of a theme change (like going to or from the Dark theme), or even better, notification of a change to some property of syntax highlighting (like the styling used for string literals)?

And what is the preferred way of querying the current syntax highlighting properties? I am using "SHTextStylerST80 new attributesFor: aProperty" now (SHPreferences doesn't provide enough), but there is talk of Shout being removed.

On 20/03/2016 03:12, monty wrote:
> How can you receive notification of a theme change (like going to or from the Dark theme), or even better, notification of a change to some property of syntax highlighting (like the styling used for string literals)?
>

Hi,

For the theme change part, morphs should implement a #themeChanged
method that should update the colours and send the method to his submorphs.


> And what is the preferred way of querying the current syntax highlighting properties? I am using "SHTextStylerST80 new attributesFor: aProperty" now (SHPreferences doesn't provide enough), but there is talk of Shout being removed.
>

--
Cyril Ferlicot

http://www.synectique.eu

165 Avenue Bretagne
Lille 59000 France

Yeah, I saw themeChanged, but what about non-morphs? How do they get notified? There should be some announcement that you can subscribe to. Should I add one?

themeChanged is the hook method which is called from World and then by default recursively traverses the tree.
If you have anything in a morph which is theming dependent, then this method should be implemented.
Currently it is the morphs job to update its other parts when the theme changed (non morph objects which is theming dependent), using an announcement for this would mean that one has to subscribe to a global which brings its own set of problems.
 
ConfigurationOfRubric 2.12 includes support for themeChanged which will reapply the syntaxHighlighting as well.


Since each textStyler object has a reference to its view one could use that to update them when the styleTable is changed:

SHTextStylerST80 >>#StyleTableChanged

 self allSubInstancesDo: [ :i |
    i view themeChanged
]


Best regards,
Henrik

-----Original Message-----
From: Pharo-dev [mailto:[hidden email]] On Behalf Of monty
Sent: Sunday, March 20, 2016 6:53 AM
To: [hidden email]
Subject: Re: [Pharo-dev] Receiving notification of theme changes or changes to syntax highlighting properties

Yeah, I saw themeChanged, but what about non-morphs? How do they get notified? There should be some announcement that you can subscribe to. Should I add one?