WPF选框文本动画

hrysbysz  于 2023-06-24  发布在  其他
关注(0)|答案(5)|浏览(113)

我可以用TranslateTransform滚动文本，但当动画接近完成时，我希望它重新开始。像蛇一样：）
这是我得到的

<StackPanel Orientation="Horizontal" Margin="0,0,0,0">
    <StackPanel.RenderTransform>
        <TranslateTransform x:Name="transferCurreny" X="-40"/>
    </StackPanel.RenderTransform>
    <StackPanel.Triggers>
        <EventTrigger RoutedEvent="StackPanel.Loaded">
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation From="0" To="-900" Duration="00:00:10"
                      Storyboard.TargetProperty="X"
                      Storyboard.TargetName="transferCurreny"
                      RepeatBehavior="Forever"/>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
    </StackPanel.Triggers>
    <TextBlock FontSize="25"  x:Name="txtKron" Margin="10,0,7,0"/>
</StackPanel>

这是我想要的

wpf

5条答案

按热度按时间
eimct9ow

eimct9ow1#

像这样的东西应该可以。
您可以在StackPanel上添加一个Canvas，其中2个TextBlocks一个设置为位置0，另一个设置为StackPanel的ActualWidth，然后当第一个文本块离开屏幕时，另一个文本块将进入视图。
我使用Canvas的原因是因为Canvas是唯一支持ClipToBounds="false"的元素，这允许第二个TextBlock可见，即使它被放置在Canvas本身的边界之外
如果你想从右向左滚动，我们还需要一个IValueConverter来获得正确的负值。
我还在SizeChanged上添加了事件触发器，所以如果窗口大小调整，动画值将正确更新。
代码：

namespace WpfApplication9
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {

        public MainWindow()
        {
            InitializeComponent();
        }
    }

    public class NegatingConverter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is double)
            {
                return -((double)value);
            }
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is double)
            {
                return +(double)value;
            }
            return value;
        }
    }
}

Xaml：

<Window x:Class="WpfApplication9.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication9"
        Title="MainWindow" Height="83" Width="222" Name="UI" Tag="Tol Level">
    <StackPanel Orientation="Horizontal" x:Name="stack">
        <StackPanel.Resources>
            <local:NegatingConverter x:Key="NegatingConverter" />
            <Storyboard x:Key="slide">
                <DoubleAnimation From="0" To="{Binding Width, ElementName=canvas, Converter={StaticResource NegatingConverter}}" Duration="00:00:10"
                      Storyboard.TargetProperty="X"
                      Storyboard.TargetName="transferCurreny"
                      RepeatBehavior="Forever"/>
            </Storyboard>
        </StackPanel.Resources>
        <StackPanel.RenderTransform>
            <TranslateTransform x:Name="transferCurreny" X="0"/>
        </StackPanel.RenderTransform>
        <StackPanel.Triggers>
            <EventTrigger RoutedEvent="StackPanel.Loaded">
                <BeginStoryboard Storyboard="{StaticResource slide}" />
            </EventTrigger>
            <EventTrigger RoutedEvent="StackPanel.SizeChanged">
                <BeginStoryboard Storyboard="{StaticResource slide}" />
            </EventTrigger>
        </StackPanel.Triggers>
        <Canvas x:Name="canvas" Width="{Binding ActualWidth, ElementName=stack}">
            <TextBlock Text="StackOverflow" FontSize="25"  x:Name="txtKron" Canvas.Left="0"/>
            <TextBlock Text="{Binding Text, ElementName=txtKron}" FontSize="25" Canvas.Left="{Binding Width, ElementName=canvas}"/>
        </Canvas>
    </StackPanel>
</Window>

结果：

**编辑：**从左到右

<StackPanel Orientation="Horizontal" x:Name="stack">
        <StackPanel.Resources>
            <local:NegatingConverter x:Key="NegatingConverter" />
            <Storyboard x:Key="slide">
                <DoubleAnimation From="0" To="{Binding Width, ElementName=canvas}" Duration="00:00:10"
                      Storyboard.TargetProperty="X"
                      Storyboard.TargetName="transferCurreny"
                      RepeatBehavior="Forever"/>
            </Storyboard>
        </StackPanel.Resources>
        <StackPanel.RenderTransform>
            <TranslateTransform x:Name="transferCurreny" X="0"/>
        </StackPanel.RenderTransform>
        <StackPanel.Triggers>
            <EventTrigger RoutedEvent="StackPanel.Loaded">
                <BeginStoryboard Storyboard="{StaticResource slide}" />
            </EventTrigger>
            <EventTrigger RoutedEvent="StackPanel.SizeChanged">
                <BeginStoryboard Storyboard="{StaticResource slide}" />
            </EventTrigger>
        </StackPanel.Triggers>
        <Canvas x:Name="canvas" Width="{Binding ActualWidth, ElementName=stack}">
            <TextBlock Text="StackOverflow" FontSize="25"  x:Name="txtKron" Canvas.Left="0"/>
            <TextBlock Text="{Binding Text, ElementName=txtKron}" FontSize="25" Canvas.Left="{Binding Width, ElementName=canvas, Converter={StaticResource NegatingConverter}}"/>
        </Canvas>
    </StackPanel>
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qqrboqgw

qqrboqgw2#

以上答案中的代码不会产生连续滚动。下面是连续平滑滚动的代码。
XAML：

<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <Grid>
        <Canvas Margin="6,83,9,0" Name="ViewingBox" Background="YellowGreen" Height="35" VerticalAlignment="Top">
            <Label Canvas.Left="263" Canvas.Top="-2" Height="49" Name="BoxOne" FontSize="20">I need breakfast.</Label>
            <Label Canvas.Left="263" Canvas.Top="-2" Height="49" HorizontalAlignment="Stretch" Name="BoxTwo" VerticalAlignment="Top" FontSize="20">You can have oranges and egg.</Label>
        </Canvas>   
    </Grid>
</Window>

VB代码后面：

Imports System.Windows.Media.Animation

Public Enum Texts
    BoxOne
    BoxTwo
End Enum

Class Window1
    Private dubAnim As New DoubleAnimation()
    Private dubAnim2 As New DoubleAnimation()
    Private NewsTimer As New Windows.Threading.DispatcherTimer()
    Dim leadText As Texts = Texts.BoxOne

    Private Sub Window1_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
        dubAnim.From = ViewingBox.ActualWidth
        dubAnim.To = -BoxOne.ActualWidth
        dubAnim.SpeedRatio = 0.05
        AddHandler dubAnim.Completed, AddressOf dubAnim_Completed
        Timeline.SetDesiredFrameRate(dubAnim, 320)
        BoxOne.BeginAnimation(Canvas.LeftProperty, dubAnim)

        dubAnim2.From = ViewingBox.ActualWidth
        dubAnim2.To = -BoxTwo.ActualWidth
        dubAnim2.SpeedRatio = 0.05
        Timeline.SetDesiredFrameRate(dubAnim2, 320)
        AddHandler dubAnim2.Completed, AddressOf dubAnim2_Completed

        AddHandler NewsTimer.Tick, AddressOf NewsTimer_Tick
        NewsTimer.Interval = New TimeSpan(0, 0, 0.9)
        NewsTimer.Start()
    End Sub

    Private Sub NewsTimer_Tick(ByVal sender As Object, ByVal e As EventArgs)
        Dim BoxOneLocation As Point = BoxOne.TranslatePoint(New Point(0, 0), ViewingBox)
        Dim BoxTwoLocation As Point = BoxTwo.TranslatePoint(New Point(0, 0), ViewingBox)

        If leadText = Texts.BoxOne Then
            Dim loc As Double = BoxOneLocation.X + BoxOne.ActualWidth
            If loc < ViewingBox.ActualWidth / 1.5 Then
                BoxTwo.BeginAnimation(Canvas.LeftProperty, dubAnim2)
                NewsTimer.Stop()
            End If
        Else
            Dim loc As Double = BoxTwoLocation.X + BoxTwo.ActualWidth
            If loc < ViewingBox.ActualWidth / 1.5 Then
                BoxOne.BeginAnimation(Canvas.LeftProperty, dubAnim)
                NewsTimer.Stop()
            End If
        End If
    End Sub

    Private Sub dubAnim_Completed(ByVal sender As Object, ByVal e As EventArgs)
        leadText = Texts.BoxTwo
        NewsTimer.Start()
    End Sub

    Private Sub dubAnim2_Completed(ByVal sender As Object, ByVal e As EventArgs)
        leadText = Texts.BoxOne
        NewsTimer.Start()
    End Sub
End Class
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uklbhaso

uklbhaso3#

扩展answer of sa_ddam213，这是对第一个动画的修改（从右到左）。这将适用于长字符串。：）

<StackPanel Orientation="Horizontal"
                    x:Name="stack" 
                    Grid.Column="0"
                    Margin="0"                        >

            <StackPanel.Resources>
                <local1:NegatingConverter x:Key="NegatingConverter" />
                <Storyboard x:Key="slide">
                    <DoubleAnimation From="{Binding ActualWidth, ElementName=stack}" 
                                     To="{Binding ActualWidth, ElementName=txtKron, Converter={StaticResource NegatingConverter}}" 
                                     Duration="00:00:30"
                                     Storyboard.TargetProperty="X"
                                     Storyboard.TargetName="transferCurreny2"
                                     RepeatBehavior="Forever"/>
                </Storyboard>
            </StackPanel.Resources>

            <Label Content="{Binding Path=RSSFeed}" 
                       x:Name="txtKron" 
                       Canvas.Left="0"
                       Foreground="#E9D460"
                       Padding="0"
                       Margin="0"
                       VerticalAlignment="Center">

                <Label.Triggers>
                    <EventTrigger RoutedEvent="Label.Loaded">
                        <BeginStoryboard Storyboard="{StaticResource slide}"/>
                    </EventTrigger>
                    <EventTrigger RoutedEvent="Label.SizeChanged">
                        <BeginStoryboard Storyboard="{StaticResource slide}"/>
                    </EventTrigger>
                </Label.Triggers>

                <Label.RenderTransform>
                    <TranslateTransform x:Name="transferCurreny2" X="0"/>
                </Label.RenderTransform>
            </Label>

        </StackPanel>
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5ktev3wc

5ktev3wc4#

为了使这适用于比元素长的字符串，并隐藏元素溢出的文本，我进一步修改了前面的答案。
要直接使用它，首先创建一个名为WpfApp1的项目
示例1：

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>

        <Border Width="200" HorizontalAlignment="Center" VerticalAlignment="Center" Height="25" ClipToBounds="True" BorderThickness="1.5" BorderBrush="Red">
            <Border x:Name="stack">
                <Border.Resources>
                    <local:NegatingConverter x:Key="NegatingConverter" />
                    <local:MarqueeMargin x:Key="MarqueeMargin" />
                    <local:NegMarqueeMargin x:Key="NegMarqueeMargin" />

                    <Storyboard x:Key="slide">
                        <DoubleAnimation From="0" To="{Binding ActualWidth, ElementName=txt_scroll, Converter={StaticResource NegMarqueeMargin}}" Duration="00:00:2"
                          Storyboard.TargetProperty="X"
                          Storyboard.TargetName="transferCurreny"
                          RepeatBehavior="Forever"/>
                    </Storyboard>
                </Border.Resources>
                <Border.RenderTransform>
                    <TranslateTransform x:Name="transferCurreny" X="0"/>
                </Border.RenderTransform>
                <Border.Triggers>
                    <EventTrigger RoutedEvent="StackPanel.Loaded">
                        <BeginStoryboard Storyboard="{StaticResource slide}" />
                    </EventTrigger>
                    <EventTrigger RoutedEvent="StackPanel.SizeChanged">
                        <BeginStoryboard Storyboard="{StaticResource slide}" />
                    </EventTrigger>
                </Border.Triggers>
                <Canvas Width="{Binding ActualWidth, ElementName=stack}">
                    <TextBlock Text="This text is too long to fit in the parent element." FontSize="15" Foreground="#F00" x:Name="txt_scroll" Canvas.Left="0"/>
                    <TextBlock Text="{Binding Text, ElementName=txt_scroll}" FontSize="15" Foreground="#F00" Canvas.Left="{Binding ActualWidth, ElementName=txt_scroll, Converter={StaticResource MarqueeMargin}}"/>
                </Canvas>
            </Border>
        </Border>

    </Grid>
</Window>

此窗口的C#代码：

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>

        <Border Width="200" HorizontalAlignment="Center" VerticalAlignment="Center" Height="25" ClipToBounds="True" BorderThickness="1.5" BorderBrush="Red">
            <Border x:Name="moving_border">
                <Border.Resources>
                    <local:NegatingConverter x:Key="NegatingConverter" />
                    <local:MarqueeMargin x:Key="MarqueeMargin" />
                    <local:NegMarqueeMargin x:Key="NegMarqueeMargin" />

                    <Storyboard x:Key="slide">
                        <DoubleAnimation From="0" To="{Binding ActualWidth, ElementName=txt_scroll, Converter={StaticResource NegMarqueeMargin}}" Duration="00:00:2"
                          Storyboard.TargetProperty="X"
                          Storyboard.TargetName="transferCurreny"
                          RepeatBehavior="Forever"/>
                    </Storyboard>
                </Border.Resources>
                <Border.RenderTransform>
                    <TranslateTransform x:Name="transferCurreny" X="0"/>
                </Border.RenderTransform>
                <Border.Triggers>
                    <EventTrigger RoutedEvent="Border.Loaded">
                        <BeginStoryboard Storyboard="{StaticResource slide}" />
                    </EventTrigger>
                    <EventTrigger RoutedEvent="Border.SizeChanged">
                        <BeginStoryboard Storyboard="{StaticResource slide}" />
                    </EventTrigger>
                </Border.Triggers>
                <Canvas Width="{Binding ActualWidth, ElementName=moving_border}">
                    <TextBlock Text="This text is too long to fit in the parent element." FontSize="15" Foreground="#F00" x:Name="txt_scroll" Canvas.Left="0"/>
                    <TextBlock Text="{Binding Text, ElementName=txt_scroll}" FontSize="15" Foreground="#F00" Canvas.Left="{Binding ActualWidth, ElementName=txt_scroll, Converter={StaticResource MarqueeMargin}}"/>
                </Canvas>
            </Border>
        </Border>

    </Grid>
</Window>
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4xrmg8kj

4xrmg8kj5#

下面是Leon Munir's answer.的C#版本

  • MainWindow.xaml*
<Window x:Class="TextAnimation.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:TextAnimation"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Canvas Margin="6,83,9,0" Name="ViewingBox" Background="YellowGreen" Height="35" VerticalAlignment="Top">
            <Label Canvas.Left="263" Canvas.Top="-2" Height="49" Name="BoxOne" FontSize="20">I need breakfast.</Label>
            <Label Canvas.Left="263" Canvas.Top="-2" Height="49" HorizontalAlignment="Stretch" Name="BoxTwo" VerticalAlignment="Top" FontSize="20">You can have oranges and egg.</Label>
        </Canvas>
    </Grid>
</Window>
  • MainWindow.xaml.cs*
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Animation;

namespace TextAnimation
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private DoubleAnimation dubAnim = new DoubleAnimation();
        private DoubleAnimation dubAnim2 = new DoubleAnimation();
        private System.Windows.Threading.DispatcherTimer NewsTimer = new System.Windows.Threading.DispatcherTimer();
        private Texts leadText = Texts.BoxOne;

        public MainWindow()
        {
            InitializeComponent();
            Loaded += Window1_Loaded;
        }


        private void Window1_Loaded(object sender, System.Windows.RoutedEventArgs e)
        {
            dubAnim.From = ViewingBox.ActualWidth;
            dubAnim.To = -BoxOne.ActualWidth;
            dubAnim.SpeedRatio = 0.05d;
            dubAnim.Completed += DubAnim_Completed;
            Timeline.SetDesiredFrameRate(dubAnim, 320);
            BoxOne.BeginAnimation(Canvas.LeftProperty, dubAnim);

            dubAnim2.From = ViewingBox.ActualWidth;
            dubAnim2.To = -BoxTwo.ActualWidth;
            dubAnim2.SpeedRatio = 0.05d;
            Timeline.SetDesiredFrameRate(dubAnim2, 320);
            dubAnim2.Completed += DubAnim2_Completed;

            NewsTimer.Tick += NewsTimer_Tick;
            NewsTimer.Interval = new TimeSpan(0, 0, (int)Math.Round(0.9));
            NewsTimer.Start();
        }

        private void NewsTimer_Tick(object sender, EventArgs e)
        {
            Point BoxOneLocation = BoxOne.TranslatePoint(new Point(0, 0), ViewingBox);
            Point BoxTwoLocation = BoxTwo.TranslatePoint(new Point(0, 0), ViewingBox);

            if (leadText == Texts.BoxOne)
            {
                double loc = BoxOneLocation.X + BoxOne.ActualWidth;
                if (loc < ViewingBox.ActualWidth / 1.5d)
                {
                    BoxTwo.BeginAnimation(Canvas.LeftProperty, dubAnim2);
                    NewsTimer.Stop();
                }
            }
            else
            {
                double loc = BoxTwoLocation.X + BoxTwo.ActualWidth;
                if (loc < ViewingBox.ActualWidth / 1.5d)
                {
                    BoxOne.BeginAnimation(Canvas.LeftProperty, dubAnim);
                    NewsTimer.Stop();
                }
            }
        }

        private void DubAnim_Completed(object sender, EventArgs e)
        {
            leadText = Texts.BoxTwo;
            NewsTimer.Start();
        }

        private void DubAnim2_Completed(object sender, EventArgs e)
        {
            leadText = Texts.BoxOne;
            NewsTimer.Start();
        }
    }
}
  • 文本cs*
namespace TextAnimation
{
    public enum Texts
    {
        BoxOne,
        BoxTwo
    }
}
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