我有一个简单的剧情板,它是重复和自动反转的。当它到达结尾并自动反转时,我想在代码后台中触发一个事件。重复时也是如此。我该怎么做?最终,我在这两个事件期间播放了一个wav文件。谢谢。
我有一个简单的剧情板,它是重复和自动反转的。当它到达结尾并自动反转时,我想在代码后台中触发一个事件。重复时也是如此。我该怎么做?最终,我在这两个事件期间播放了一个wav文件。谢谢。
<Grid x:Name="uxGrid" Background="White">
<Grid.Triggers>
<EventTrigger RoutedEvent="Grid.Loaded">
<BeginStoryboard>
<Storyboard>
<ColorAnimation Storyboard.TargetName="uxGrid" Changed="ColorAnimation_Changed" CurrentTimeInvalidated="ColorAnimation_CurrentTimeInvalidated" Storyboard.TargetProperty="Background.Color" From="Blue" To="Green" Duration="0:0:5" AutoReverse="True" RepeatBehavior="Forever" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Grid.Triggers>
</Grid>
示例代码:
private double? _clockLastProgress; // Tracks Trend
private bool _clockLastDecreased; // Tracks Trend Direction
private void ColorAnimation_CurrentTimeInvalidated(object sender, EventArgs e)
{
AnimationClock clock = sender as AnimationClock;
if (clock != null && clock.CurrentProgress.HasValue)
{
if (!_clockLastProgress.HasValue)
{
// Your Code Here
}
else
{
if (_clockLastDecreased)
{
if (clock.CurrentProgress > _clockLastProgress)
{
// Your Code Here
_clockLastDecreased = false;
}
}
else
{
if (clock.CurrentProgress < _clockLastProgress)
{
// Your Code Here
_clockLastDecreased = true;
}
}
}
_clockLastProgress = clock.CurrentProgress.Value;
}
}