淡出一扇窗 [英] Fading out a window

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本文介绍了淡出一扇窗的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我目前正在开发一个 wpf c# 应用程序.我已将事件触发器添加到窗体的 xaml,以便在窗口加载时淡入并在窗口关闭时淡出.

I am currently developing a wpf c# application. I have added to event triggers to the xaml of the form to fade in when the window loads and fades out when the window closes.

淡入效果完美,没有任何问题,但淡出效果不佳.

The fading in works perfectly without any problems but the fading out is not working.

我已经设置好窗口在加载时淡入,有一个持续 5 秒的计时器,然后调用表单淡出事件.

I have it set up so the window fades in when it loads, has a timer to last 5 seconds, and then calls the form fade out event.

然而,窗口不会淡出它只是立即关闭没有动画.下面是淡入淡出事件的代码

However, the window doesn't fade out it just closes straight away no animation. Below is the code I have for the fade in and fade out events

<Window.Triggers>
        <EventTrigger RoutedEvent="Window.Loaded">
            <BeginStoryboard>
                <Storyboard Name="FormFade">
                    <DoubleAnimation Name="FormFadeAnimation"
                                     Storyboard.TargetProperty="(Window.Opacity)"
                                     From="0.0" To="1.0" Duration="0:0:1"
                                     AutoReverse="False" RepeatBehavior="1x" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
        <EventTrigger RoutedEvent="Window.Unloaded">
            <BeginStoryboard>
                <Storyboard Name="FormFadeOut" Completed="FormFadeOut_Completed">
                    <DoubleAnimation Name="FormFadeOutAnimation"
                                     Storyboard.TargetName="FormFadeOut"
                                     Storyboard.TargetProperty="(Window.Opacity)"
                                     From="1.0" To="0.0" Duration="0:0:1"
                                     AutoReverse="False" RepeatBehavior="1x" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </Window.Triggers>

感谢您提供的任何帮助.

Thanks for any help you can offer.

推荐答案

Unloaded 不是一个合适的事件,我不确定这个事件是否可以在 Windows 上发生.您需要处理Closing,防止它实际关闭,启动动画并在动画的Completed事件发生时关闭它.

Unloaded is not a suitable event for this, i'm not sure if this event can even occur for windows. You need to handle Closing, prevent it from actually closing, start an animation and close it when the Completed event of the animation occurs.

例如

<Window ...
        Closing="Window_Closing">

private void Window_Closing(object sender, CancelEventArgs e)
{
    Closing -= Window_Closing;
    e.Cancel = true;
    var anim = new DoubleAnimation(0, (Duration)TimeSpan.FromSeconds(1));
    anim.Completed += (s, _) => this.Close();
    this.BeginAnimation(UIElement.OpacityProperty, anim);
}

这篇关于淡出一扇窗的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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