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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

Timelines

A timeline represents a stretch of time. It usually also describes one or more things that happen during that time. All timeline types derive from the Timeline base class, which defines various common properties. For example, the animation types described in the preceding section are timelines. Consider this DoubleAnimation:

<DoubleAnimation From="10" To="300" BeginTime="0:0:2" Duration="0:0:5" />

Timelines of all kinds have a start time and a duration identifying the particular stretch of time they describe. The Duration property indicates that this DoubleAnimation represents a five-second stint. As the BeginTime property indicates, it starts at an offset of two seconds. BeginTime is relative to the timeline's container. For example, if an animation is defined inside a storyboard, the start time is relative to when the storyboard begins. If the start time is not specified, it defaults to 0:0:0. BeginTime and Duration are just two of the standard properties available on every timeline. Table 16-3 shows the properties common to all timelines.

Table 16-3. Timeline properties

Property

Usage

AccelerationRatio

Causes the timeline to ramp up to speed at the start

AutoReverse

Makes the timeline run in reverse once it reaches the end

BeginTime

Start time, relative to parent

DecelerationRatio

Causes the timeline to slow down toward the end

Duration

The length of the timeline

FillBehavior

How the timeline behaves when it reaches its natural end

Name

An optional name

RepeatBehavior

Indicates whether ...

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Publisher Resources

ISBN: 9780596510374Supplemental ContentErrata Page