The themes can be switched at runtime by interacting with the IThemeEngine, which can be acquired from the Eclipse 4 runtime service through injection. This provides a list of all installed themes, which can be used to populate the list viewer, and to allow the style to be changed.
Create a class called
ThemePartin thecom.packtpub.e4.application.partspackage. Add an injected fieldIThemeEngine, and acreatemethod annotated with@PostConstructthat takes aCompositeparameter:public class ThemePart { @Inject private IThemeEngine themeEngine; @PostConstruct public void create(Composite parent) { } }In the
createmethod, add aListViewerthat is associated with anArrayContentProvider:ListViewer lv = new ListViewer(parent, SWT.NONE); lv.setContentProvider(new ArrayContentProvider());
Add a selection listener to the list viewer so that when an item is selected, the element is compared with the list of themes; if one is found, set it through...