我正在为窗口的不透明度设置动画
...
DoubleAnimation myDoubleAnimation =
new DoubleAnimation(1.0, 0.0, new Duration(TimeSpan.FromSeconds(0.25)), FillBehavior.Stop);
Storyboard.SetTargetName(myDoubleAnimation, "wndNumpad");
Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Window.OpacityProperty));
m_fadeOut = new Storyboard();
m_fadeOut.Children.Add(myDoubleAnimation);
m_fadeOut.Completed += new EventHandler(FadeOut_Completed);
...
private void FadeOut_Completed(object sender, EventArgs e)
{
// Only hide the running instance
this.Visibility = System.Windows.Visibility.Hidden;
// this.Close();
}
如果在FadeOut_Completed()运行后更改了显示器的屏幕分辨率,即窗口的不透明度已设置动画并且窗口被隐藏。然后重新显示窗口将显示几乎透明的窗口。虽然Window.Opacity属性声称不透明度为1,但我会说它隐藏窗口时的不透明度。如果我没有动画但只是将不透明度设置为0并隐藏窗口并在分辨率更改后将不透明度设置为1,窗口按预期重新显示。我还尝试在FadeOut_Completed中将不透明度设置为1。
有没有人知道发生了什么以及如何避免这个问题?
此致 马库斯
答案 0 :(得分:0)
您必须拥有透明窗口(AllowsTransparency="True"
),不可调整大小(ResizeMode="NoResize"
)并且没有边框(WindowStyle="None"
)。在C#代码中,我创建了一个DoubleAnimation
来改变窗口的不透明度,当它完成时,窗口将被关闭。
XAML代码:
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525" Background="Red" WindowStyle="None" AllowsTransparency="True" ResizeMode="NoResize">
<Grid>
</Grid>
</Window>
C#代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DoubleAnimation da = new DoubleAnimation();
da.From = 1;
da.To = 0;
da.Duration = new Duration(TimeSpan.FromSeconds(2));
da.Completed += new EventHandler(da_Completed);
this.BeginAnimation(OpacityProperty, da);
}
void da_Completed(object sender, EventArgs e)
{
this.Close();
}
}
}