Ryan Paul takes
at Unity and the Heads-Up Dispaly (HUD) in the 12.04 release. "The HUD is powered by the same mechanism that supports Unity’s global menu system. In order to make an application’s menus available to Unity so that it can display it in the panel, the contents of the menu are relayed over the D-Bus interprocess communication system. The HUD taps into that data, essentially offering an alternate presentation of the menu. In addition to being extremely useful, the HUD is a compelling illustration of how Unity’s architectural strengths can be put to use in novel ways.
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