[英]WPF opacity animation in c#?
我有一個設置為隱藏可見性的矩形,當一個文本框被聚焦時,該矩形的可見性可見。 這很好用,但是我想要一個不透明動畫。.如何在C#中做到這一點
這是我的代碼;
<Grid>
<Rectangle Height="650" Width="625" x:Name="Rectangle" Fill="#293241" Opacity="0.8" Visibility="Hidden" Panel.ZIndex="1" ></Rectangle>
<StackPanel Margin="0,51,0,-51">
<TextBox x:Name="text" GotKeyboardFocus="text_GotKeyboardFocus" Margin="158,0,169,0" Height="24" Text="Select Your Time..." />
<Popup x:Name="popup" AllowsTransparency="True" Width="430" Height="400" Placement="Center" >
<Grid>
<StackPanel Width="430" Height="400" Orientation="Horizontal" Margin="0,-118,0,118">
<TextBox x:Name="text2" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="1 second" />
<TextBox x:Name="text3" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="2 seconds" />
<TextBox x:Name="text4" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="5 seconds" />
<TextBox x:Name="text5" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="10 seconds" />
<TextBox x:Name="text6" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="20 seconds" />
</StackPanel>
<StackPanel Width="430" Height="400" Orientation="Horizontal" Margin="0,-38,0,38">
<TextBox x:Name="text7" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="30 seconds" />
<TextBox x:Name="text8" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="1 minute" />
<TextBox x:Name="text9" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="5 minutes" />
<TextBox x:Name="text10" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="10 minutes" />
<TextBox x:Name="text11" Background="#f4f4f4" Margin="10" GotKeyboardFocus="text_GotKeyboardFocus2" Cursor="Arrow" Height="64" Width="64" Text="Forever" />
</StackPanel>
</Grid>
</Popup>
</StackPanel>
</Grid>
private void text_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
popup.IsOpen = true;
Rectangle.Visibility = Visibility.Visible;
}
private void text_GotKeyboardFocus2(object sender, RoutedEventArgs e)
{
popup.IsOpen = false;
text.Text = (sender as TextBox).Text;
Rectangle.Visibility = Visibility.Hidden;
}
這應該工作:
private void text_GotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
{
popup.IsOpen = true;
Rectangle.BeginAnimation(UIElement.OpacityProperty,
new DoubleAnimation(1d, TimeSpan.FromSeconds(0.5)));
}
private void text_GotKeyboardFocus2(object sender, RoutedEventArgs e)
{
popup.IsOpen = false;
text.Text = (sender as TextBox).Text;
Rectangle.BeginAnimation(UIElement.OpacityProperty,
new DoubleAnimation(0d, TimeSpan.FromSeconds(0.5)));
}
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