Skip to Main Content
Programming WPF, 2nd Edition
book

Programming WPF, 2nd Edition

by Chris Sells, Ian Griffiths
August 2007
Intermediate to advanced content levelIntermediate to advanced
864 pages
25h 52m
English
O'Reilly Media, Inc.
Content preview from Programming WPF, 2nd Edition

Transformations

Support for high-resolution displays is an important feature of WPF. This is enabled in part by the emphasis on the use of scalable vector graphics rather than bitmaps. But as experience with GDI+ and GDI32 has shown, if scalability is not integrated completely into the graphics architecture, resolution independence is very hard to achieve consistently in practice.

WPF's support for scaling is built in at a fundamental level. Any element in the user interface can have a transformation applied, making it easy to scale or rotate anything in the user interface.

As we saw in Chapter 3, all user interface elements have RenderTransform and LayoutTransform properties. These are of type Transform, which is an abstract base class. There are derived classes implementing various affine transformations,[95] listed in Table 13-8.

Table 13-8. Transform types

Transform class

Usage

MatrixTransform

General-purpose transform based on 3 × 3 matrix

RotateTransform

Rotates around a point

ScaleTransform

Scales in x and/or y

SkewTransform

Shears (e.g., converts a square into a rhombus)

TransformGroup

Combines several transforms into one

TranslateTransform

Moves items by a specified vector

Most of these are just convenience classes—you can represent all supported transformations by the MatrixTransform class. This contains a 3 × 3 matrix, allowing any affine transformation to be used. However, the other transform types are often easier to work with than the set of numbers in a matrix.

Example 13-58 ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Programming C#, 4th Edition

Programming C#, 4th Edition

Jesse Liberty
Programming C# 10

Programming C# 10

Ian Griffiths

Publisher Resources

ISBN: 9780596510374Supplemental ContentErrata Page