Adding Theme Property.txt

When it's necessary to add another key to the Theme definition the following steps should be
taken.

* ADDING NEW PROPERTY OF EXISTING TYPE -------------------------------------------------------------

1. Add appropriate key to the existing type (for example, ThemeKey.Font or ThemeKey.Color).
 The notation is simple:

 CATEGORY_SUBCATEGORY_..._TYPE

 like

 ARTICLELIST_FEEDNAME_FG

2. Make sure LAFTheme will return a value for your new key (run TestLAFTheme test for that).

3. Add method to get your property from ChannelRenderingSettings (only getter required).
 See getSelectedArticleBackground() for example.

4. Add the co-named method to RenderingManager. See getArticleListFeedNameFont() for example.

5. Use your new property in code:

 RenderingManager.getYouPropertyValue()

6. Subscribe the components accessing the property to RenderingManager's event about Theme change:

 RenderingManager.addPropertyChangeListener(RenderingSettingsNames.THEME, somelistener);

 When the theme changes RenderingManager emits the propertyChange event. The name of changed
 property is: RenderingSettingsNames.THEME. So, you can catch this change and see if the value
 of your new property has changed and if you require the repainting.
 (see ArticlePanel.propertyChange() for example).


* ADDING NEW TYPE OF PROPERTIES --------------------------------------------------------------------

1. Add an appropriate sub-type to ThemeKey (see ThemeKey.Font and ThemeKey.Color)

2. Add method to ITheme to return values for your new keys type.

3. Add test to TestLAFTheme.