Very often when building a user interface, there will be a need to repeat styles across different components in the application. Instead of using the generic class type, or having to encode multiple styles on a part-by-part basis, CSS classes can be used to define a standard style and applied to individual widgets.
A label will be added to the sample part and associated with a CSS style, and that will be stored in the default CSS file.
Open the
Helloclass and go to thecreatemethod that creates the part's UI.At the end of the method, add a new
Label, which will be used to demonstrate the styling:Label label = new Label(parent, SWT.NONE); label.setText("Danger Will Robinson!");Associate the label with a custom CSS class using the
setDatamethod on the SWT widget along with theorg.eclipse.e4.ui.css.idkey and the name of the CSS class:label.setData("org.eclipse.e4.ui.css.id", "DireWarningMessage");Finally add the class to the
default.cssfile so...