| 摘要 |
Systems and methods for displaying a graphical indication of events on a display of a portable computing device are provided. The system may include an event detector module to receive a series of event notifications over time for one or more predetermined event types, and to process properties of each event notification to determine an intensity value for each event notification. The computing system may further include a graphical user interface engine to present one or more passive tracking indicators corresponding to a predetermined event type, in a location that is visible irrespective of other content displayed on the display. The graphical user interface engine is further configured to, for each event notification, adjust the appearance of the corresponding passive tracking indicator in response to the determined intensity value, such that the appearance of the passive tracking indicator changes over time according to the determined intensity values.
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