The Tablet PC SDK, C

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Developing for Tablet PCs

• The Tablet PC SDK, C, and .NET

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Agenda

• HW 1
• The Tablet PC SDK
• Visual Studio .NET 2003
• Some C

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HW 1 Getting Acquainted

• Goal create a simple interface that allows users
  to write, erase, and select hand-written notes.
• INDIVIDUAL assignment
• Due date February 7 (2 weeks)

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HW 1 Details

• Your application must provide
• A menubar with the following menus
• File Exit (exits the application)
• Edit Undo, Redo, Cut, Copy, Paste, Delete (don't
  have to work)
• A toolbar with the following icons
• Pen (inking mode)
• Eraser (erasing mode)
• Lasso (selection mode)

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HW 1 More Details

• You must also provide
• A note-taking area with a scrollbar and a button
  for adding more space
• For this assignment you may rely on an InkOverlay
  instance to handle both collecting and displaying
  the ink.

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Future HWs

• HW 2 Custom Input and Output
• HW 3 Storage and Retrieval
• HW 4 Simple Gesture Recognition
• HW 5 Tagging
• HW 6 Accessing Notes
• HWs 2-6 are GROUP assignments

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HW 1 Questions?
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The Tablet PC SDK

• High-level Objects
• Tablet 2D input device
• Can include mice, touchpads
• Tablets collection of Tablet objects
• Cursor conceptual tip of pen, focus of
  interaction
• NOT visual representation of pen tip
• Cursors collection of Cursor objects
• e.g. pen nib and eraser ends

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The Tablet PC SDK

• Three main categories of ink support
• Capture
• Tablet Input API
• Manipulation
• Ink Data Management API
• Recognition
• Ink Recognition API

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Tablet Input API

• InkCollector fundamental object used to collect
  and render ink
• Generates ink-related events
• Can register for events of interest
• Packages Cursor movements into strokes
• Can paint ink strokes as collected
• InkOverlay superset of InkCollector that adds
  selecting and erasing of ink

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More on InkOverlay

• Uses Windows Forms component OR own transparent
  window as ink canvas
• EditingMode property Ink, Select (move,resize),
  Delete (stroke, point)
• CollectionMode property InkOnly, InkAndGesture,
  GestureOnly

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Ink Events

• Pen movement
• CursorInRange, NewInAirPackets, CursorOutOfRange
• CursorDown, NewPackets, SystemGesture, CursorUp
• CursorButtonDown/Up
• Rendering Painting, Painted
• NOTE cannot rely on absolute ordering of ink and
  mouse events

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Ink Packet Properties

• By default get X and Y
• NOTE HIMETRIC units, not pixels!
• Can also request pressure, roll, pitch, rotation,
  etc. (but may not provide)
• Packets passed via shared memory, so more data
  adds latency

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Ink Data Management API

• Ink
• contains ink strokes for Collector or Overlay
• can add / remove strokes
• hit testing
• save and load from binary stream, clipboard
• can generate Strokes collection

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Ink Data Management API

• Strokes
• collection of references to strokes
• Stroke
• provides access to single ink stroke
• detailed point-level data about stroke
• DrawingAttributes
• color, transparency, width, anti-aliased, etc.

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Ink Recognition API

• Recognizer
• particular recognition engine
• RecognizerContext
• means of interacting with engine
• RecognitionResult
• results from performing recognition

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Visual Studio .NET 2003

• Available on CoC Windows Clusters machines
• Tablet PC SDK installed on them, also available
  via free download from MS

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Visual Studio .NET 2003

• Brief Demo

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Other Languages / Platforms

• What about VS .NET 2005, Java, ?
• Yes, BUT you void your warranty. If it does run
  and I cant read the code, you get a 0.

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Resources

• Tablet PC Development Center
• http//msdn.microsoft.com/mobility/tabletpc/defaul
  t.aspx
• Books in my lab space
• Building for Tablets, .NET, C
• MSDN Libraries
• Web tutorials (links on HW 1 page)
• Ask questions on course swiki

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Questions?
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Next Time

• Interaction Models
• Formal
• Informal