Abstract: Embodiments of the invention comprise a method and apparatus for synchronizing interface objects of an application's graphic user interface (GUI) with underlying data. A design tool is used in embodiments of the invention to specify an interface object's binding properties. Data binding properties can define an association between an interface object and underlying data for synchronization purposes. In addition, a validation binding can be specified for an interface object that can be used to validate the data entered via the interface object. An expression binding associates an interface object to a plurality of interface objects and/or underlying data sources that contain data used in evaluating an expression the result of which is displayed in the interface object. A query expression binding associates a plurality of interface objects and/or underlying data sources and to an evaluatable expression the result of which is used in a query to retrieve a data source's data.

Abstract: A graphical editing system is provided which creates a "place-holder" that holds or suspends a complex gesture or complex menu selection before committing to the command. Such a place-holder acts as a virtual stylus, i.e. as if the user was actually holding the stylus to the screen just prior to committing to the command. The virtual stylus thus allows the user to execute other arbitrary drawings or menu commands or gestures while the original complex command is suspended. The user can then return to the complex command he/she chooses and remove the place-holder to commit to the command or cancel the command if desired. The virtual stylus can take on many forms, e.g., a hand with a pointed finger, an icon or any other desired indicator, and the virtual stylus can be created by any user action, e.g., an actuated stylus button, pressure sensitive display surface or by sensing the time during which the stylus remains stationary on the display screen. The virtual stylus can be removed in basically the same way.