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18 lines
1.8 KiB
Markdown
18 lines
1.8 KiB
Markdown
---
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title: "How to: Change the Speed of a Clock Without Changing the Speed of Its Timeline"
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ms.date: "03/30/2017"
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dev_langs:
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- "csharp"
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- "vb"
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helpviewer_keywords:
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- "speed of Clock [WPF], changing"
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- "clocks [WPF], changing speed of"
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ms.assetid: 72f36dd0-f085-445d-8589-19a83fe74f5e
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---
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# How to: Change the Speed of a Clock Without Changing the Speed of Its Timeline
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A <xref:System.Windows.Media.Animation.ClockController> object's <xref:System.Windows.Media.Animation.ClockController.SpeedRatio%2A> property enables you to change the speed of a <xref:System.Windows.Media.Animation.Clock> without altering the <xref:System.Windows.Media.Animation.Timeline.SpeedRatio%2A> of the clock's <xref:System.Windows.Media.Animation.Timeline>. In the following example, a <xref:System.Windows.Media.Animation.ClockController> is used to interactively modify the <xref:System.Windows.Media.Animation.ClockController.SpeedRatio%2A> of a clock. The <xref:System.Windows.Media.Animation.Clock.CurrentGlobalSpeedInvalidated> event and the clock's <xref:System.Windows.Media.Animation.Clock.CurrentGlobalSpeed%2A> property are used to display the clock's current global speed each time its interactive <xref:System.Windows.Media.Animation.ClockController.SpeedRatio%2A> is changed.
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## Example
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[!code-csharp[timingbehaviors_procedural_snip#GraphicsMMClockControllerSpeedRatioExample](~/samples/snippets/csharp/VS_Snippets_Wpf/timingbehaviors_procedural_snip/CSharp/ClockControllerSpeedRatioExample.cs#graphicsmmclockcontrollerspeedratioexample)]
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[!code-vb[timingbehaviors_procedural_snip#GraphicsMMClockControllerSpeedRatioExample](~/samples/snippets/visualbasic/VS_Snippets_Wpf/timingbehaviors_procedural_snip/visualbasic/clockcontrollerspeedratioexample.vb#graphicsmmclockcontrollerspeedratioexample)]
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