4

当我尝试为我的主窗口设置动画时，只有高度会被动画，但是当我使用相同的代码为我的网格设置动画时它工作正常。请帮助我，因为我是 wpf 的新手

<Window x:Class="TestingDemo.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:TestingDemo"
    mc:Ignorable="d"
    Name="myWindow"
    AllowsTransparency="True"
    WindowStyle="None"
    Background="Blue"
    Title="MainWindow" Height="100" Width="100">
<Grid>
    <TextBlock MouseDown="TextBlock_MouseDown">
        OpenMe
        <TextBlock.Triggers>
            <EventTrigger RoutedEvent="MouseDown">
                <BeginStoryboard>
                    <Storyboard>
                        <DoubleAnimation
                            Storyboard.TargetName="myWindow"
                            Storyboard.TargetProperty="Height"
                            From="100"
                            To="600"></DoubleAnimation>
                        <DoubleAnimation
                            Storyboard.TargetName="myWindow"
                            Storyboard.TargetProperty="Width"
                            From="100"
                            To="600"></DoubleAnimation>


                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </TextBlock.Triggers>
    </TextBlock>
   </Grid>
</Window>

W

4

2 回答 2

0

可惜改变WidthandHeight的和Window是分开的，而且成本高。和of是 WPF 依赖属性Width，但它们以本机方式工作。的相同属性以 WPF 方式工作。HeightWindowGrid

建议避免为 的WidthandHeight属性设置动画Window。相反，动画内部框架元素。

我在下面尝试了这段代码，但运行不顺利：

while (true)
{
    await Task.Delay(10);
    Width += 10;
    Height += 10;
}
于 2018-05-29T06:35:20.227 回答
0

这就是我正在做的事情，它就像一个魅力：

  <Window.Triggers>
        <EventTrigger RoutedEvent="Loaded">
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Width" From="0" To="yourWidth" Duration="0:0:1" FillBehavior="HoldEnd" AutoReverse="False" />
                    <DoubleAnimation Storyboard.TargetProperty="Height" From="0" To="yourHeight" Duration="0:0:3" FillBehavior="HoldEnd" AutoReverse="False"/>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
 </Window.Triggers>

    I have hooked it for Window Loaded event but you can change it as you wish but the key is If you want smooth animation then you have to manually push frames in a timer or thread like:

  /// <summary>
    /// 
    /// </summary>
    public static class DispatcherHelper
    {
        /// <summary>
        /// Simulate Application.DoEvents function of <see cref=" System.Windows.Forms.Application"/> class.
        /// </summary>
        [SecurityPermissionAttribute ( SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode )]
        public static void DoEvents ( )
        {
            DispatcherFrame frame = new DispatcherFrame ( );
            Dispatcher.CurrentDispatcher.BeginInvoke ( DispatcherPriority.Background,
                new DispatcherOperationCallback ( ExitFrames ), frame );

            try
            {
                Dispatcher.PushFrame ( frame );
            }
            catch ( InvalidOperationException )
            {
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="f"></param>
        /// <returns></returns>
        private static object ExitFrames ( object frame )
        {
            ( ( DispatcherFrame ) frame ).Continue = false;

            return null;
        }
    }

请小心，因为不建议手动推动框架，但如果您知道自己在做什么，那就把自己打晕！:)。

于 2018-05-29T07:24:58.220 回答