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Split gestures into recognition and application
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Gesture detection is not an exact science, but the algorithms
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inevitably involve decisions influenced by what gestures are available
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to choose from. Therefore, the recognition should be considered an
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inherent property of the device itself, regardless of user interaction
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context. Just imagine having a keyboard that resized slightly
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everytime you switched from chrome to gimp.
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Tag events as being part of a gesture
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One of the problems faced when replacing one set of events with
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another is where and how this filtering should take place. One window
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might listen for spiral gestures, whereas another window is a paint
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program where you actually want to draw a spiral. By introducing a
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relation between a gesture and an event, filtering becomes something
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simple that can be performed close to the window. The relation can be
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implemented as a bitmask representing what gestures the event is part
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Help the client to keep track of active gestures
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A gesture starts, continues, and either completes or aborts.
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A client that listens to a subset of gestures will have to keep track.
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Compatible to Qt approach.
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Would there be client feedback on confirmation?