Download Building Tablet PC Applications by Rob Jarrett PDF

By Rob Jarrett

Provides an authoritative dialogue of pen-based person interfaces and offers an in-depth exposition of the pill computing device Ink SDK, entire with improvement counsel and methods

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The technique is easier to see in these magnified circles. At normal size, the antialiased circle will look smoother. Pen Tip Shape To add a subtle enhancement to the realism of digital ink, two pen tips are supported. You can ask the Tablet PC Platform to render ink as if it were drawn using either a round-tipped pen or a rectangular-tipped pen. A round-tipped pen simulates a ballpoint pen: the ends of ink strokes are semicircular, and inflections in the stroke have rounded edges to them. A rectangular-tipped pen, on the other hand, simulates the appearance of felt-tipped markers that have rectangular tips.

Here are two examples of how using second order ink as a natural form of input can make an application better: • Ink for spatial layout Any application that requires the user to create and spatially arrange items is a good candidate for second order ink. A typical example of such an application is Microsoft Visio, which is a diagramming application. Generating flowcharts and other diagrams in Visio using a mouse can sometimes be tedious. Creating, resizing, and placing shapes are often time-consuming, requiring careful and adept mouse manipulation.

To this, tablet manufacturers add a layer, usually made of plastic, to protect the screen from the constant rubbing of the pen†s tip. These protective layers together introduce several millimeters between the surface of the tablet and the underlying screen image. When viewing the tip of a pen and its corresponding screen cursor from an angle, parallax results. Parallax affects users nearly all the time because they rarely look at the pen from directly over it. It†s much more natural to look at the pen from a slight angle when writing.

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