Themes

Neverball features a themeable GUI, which allows designers to give custom look and feel to GUI elements.

The default Neverball GUI theme can be found in data/gui/classic.

Theme selection is controlled by the theme option in the neverballrc configuration file.

Images

Backgrounds for GUI elements are defined by four images, each representing a GUI state.

• back-plain.png gives the default background for all elements.
• back-plain-focus.png gives the background for focused elements, for example, when the cursor is hovering over a button.
• back-hilite.png gives the background for highlighted elements, such as a toggle button that has been enabled.
• back-hilite-focus.png gives the background for focused and highlighted elements.

Theme description

The way in which these images are displayed is defined in a file called theme.txt. Currently it contains a single directive.

slice 0.25 0.25 0.25 0.25

The slice directive defines what portion of the GUI images should be used for each border using four parameters. These parameters are ordered left, right, top then bottom, and defined in values between 0.0 (none of the image) and 1.0 (the entirety of the image).