1. Tablet PC Programming: Basics
CSE481B Lecture 3
Craig Prince
Jan

2. Outline Tablet PC UI Controls Ink and Strokes Ink Events
Ink Data Format
DrawingAttributes Class
Ink Transformations
Measuring and Modifying Strokes

3. Resources Tablet PC SDK “Building Tablet PC Applications”
Latest v1.7
Installed on all machines
Download from MS
The SDK Help is Useful
“Building Tablet PC Applications”
Covers the basics
Search the Web

4. 4 UI Controls InkCollector – Basic
InkOverlay – Adds selection, erasing, highlighting, etc.
InkPicture – Draw ink on a picture
InkEdit – Ink turned straight into text

5. Example

6. Ink and Strokes InkOverlay Ink Stroke Stroke Stroke Ink.Strokes
InkOverlay.Selection

7. Ink Events Ink – InkAdded, InkDeleted
InkCollector – All sorts of Events
InkOverlay – All sorts of Events + More
Easiest to explore them from the SDK docs

8. Example

9. Ink Data Format Series of Packets: Stroke.GetPacketData()
X, Y, Pressure, etc.
Example

10. DrawingAttributes
See SDK

11. Ink Transformations Renderer class
Does all the drawing of ink, uses the DrawingAttributes
Draw() is most important
Calling directly allows some neat effects

12. Aside: Two helpful functions
InkSpaceToPixel
PixelToInkSpace

13. Ink Transformations Set/GetObjectTransform Set/GetViewTransform
Object  View  World
Let’s see an example

14. Example

15. Measuring and Modifying Strokes
GetBoundingBox
HitTest (Rectangle, circle, or blob)
NearestPoint (both Ink and Stroke)
Strokes.Split(float)
Clip (Ink, Strokes, and Stroke)

16. Coming Next Ink Recognition Real Time Stylus Text Recognition Gestures
Custom Recognizers
Real Time Stylus
Few Differences
When to Use