从隐藏到折叠的可见性中的动画,反之亦然

Question

我试图实现类似于iPhone消息视图的东西.在按钮上单击,删除按钮将滑出每个消息,单击"完成"删除按钮将滑入.我已经能够使用mvvm实现,除了滑动效果.这是我用我有限的知识写的风格:

<Style TargetType="Border">
    <Style.Triggers>
        <DataTrigger Binding="{Binding ShowDeleteButton}" Value="false">
            <Setter Property="Visibility" Value="Collapsed"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

这里"ShowDeleteButton"是视图模型中的bool属性.这很好用.但是崩溃和"变得可见"正在突然而且非常快地发生.我需要一些滑动动画.请注意,当删除按钮消失时,其余控件应占用剩余空间,并且当按钮出现时,现有控件应缩小并为按钮提供空间.我试过故事板动画,但即使几个小时后我也无法弄清楚它投掷的奇怪错误.这是代码:

<DataTrigger Binding="{Binding ShowDeleteButton}" Value="false">
     <DataTrigger.EnterActions>
          <BeginStoryboard>
               <Storyboard BeginTime="0:0:1">
                  <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visiblity">
                     <DiscreteObjectKeyFrame Value="{x:Static Visibility.Collapsed}" />
                  </ObjectAnimationUsingKeyFrames>
                </Storyboard>
           </BeginStoryboard>
      </DataTrigger.EnterActions>
      <DataTrigger.ExitActions>
            <BeginStoryboard>
               <Storyboard BeginTime="0:0:1">
                 <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visiblity">
                     <DiscreteObjectKeyFrame Value="{x:Static Visibility.Visible}" />
                 </ObjectAnimationUsingKeyFrames>
               </Storyboard>
            </BeginStoryboard>
      </DataTrigger.ExitActions>
</DataTrigger>

有人可以帮助陷入困境的灵魂吗？

问候

Answer 1

老问题......呵呵......

无论如何......忘记能见度.诀窍是动画Width/Height放置在控制的Grid's Column/Row,其中Column/Row已经宽度设置为自动.Uff :)

所以这里有一个Grid带有两列的命名"容器".在第一列中可以放置任何您想要的,但是您应该将它对齐到右边,因为您希望它在显示删除按钮时移动.在第二列中有一个Control (代表您的DeleteButton)注意第一列有Width="*"第二列,第二列有Width="Auto"

<Grid Background="Purple" Width="350" Height="100">
    <CheckBox Content="Show" IsChecked="{Binding Path=ShowDeleteButton}" Height="16" HorizontalAlignment="Left" Margin="12,12,0,0" Name="checkBox1" VerticalAlignment="Top" />
    <Grid x:Name="container" Margin="40,0,0,0">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>
        <Grid Name="content" Margin="0">
            <Label Content="Look I'm flyin'!" Margin="0,30,10,0" VerticalAlignment="Top" HorizontalAlignment="Right"/>
        </Grid>
        <Control Grid.Column="1" Margin="0">
            <Control.Template>
                <ControlTemplate>
                    <ControlTemplate.Triggers>
                        <DataTrigger Binding="{Binding ShowDeleteButton}" Value="true">
                            <DataTrigger.EnterActions>
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation 
                                Storyboard.TargetName="flyout"
                                Storyboard.TargetProperty="(Grid.Width)" 
                                From="0" To="120" Duration="0:0:1" AutoReverse="False"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </DataTrigger.EnterActions>
                            <DataTrigger.ExitActions>
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation 
                                Storyboard.TargetName="flyout"
                                Storyboard.TargetProperty="(Grid.Width)" 
                                From="120" To="0" Duration="0:0:1" AutoReverse="False"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </DataTrigger.ExitActions>
                        </DataTrigger>
                    </ControlTemplate.Triggers>
                    <Grid x:Name="flyout" Width="0">
                        <Rectangle Fill="Green"/>
                        <Label Content="I'm DELETE button" Margin="10,30,0,0" VerticalAlignment="Top"/>
                    </Grid>
                </ControlTemplate>
            </Control.Template>
        </Control>
    </Grid>
</Grid>

并且ControlGrid的第二列DataTrigger基于ViewModel的属性"ShowDeleteButton"

由于放置Width的列的位置,您可以更改使用简单的宽度,并获得所需的行为.ControlAutoControlDoubleAnimation

编辑

如果你想要弹出窗口超过其他所有东西,请看这个.

<Grid x:Name="LayoutRoot">
    <Grid x:Name="container" Width="120" HorizontalAlignment="Right">
            <Button x:Name="button" Content="In" Margin="0,13,7.5,0" VerticalAlignment="Top" HorizontalAlignment="Right" d:LayoutOverrides="HorizontalAlignment">
                <Button.Triggers>
                    <EventTrigger RoutedEvent="Button.Click">
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation 
                                    Storyboard.TargetName="flyout"
                                    Storyboard.TargetProperty="(Grid.Width)" 
                                    From="0" To="120" Duration="0:0:1" AutoReverse="False"/> 
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </Button.Triggers>
            </Button>
    </Grid>
    <Grid x:Name="flyout" Width="120" Margin="0" HorizontalAlignment="Right">
            <Rectangle Fill="Green"/>
            <Label Content="This is some label" Margin="6.038,27,1.006,0" VerticalAlignment="Top"/>
            <Button Content="Out" Margin="11.917,58,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" Width="80.083">
                <Button.Triggers>
                    <EventTrigger RoutedEvent="Button.Click">
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation 
                                    Storyboard.TargetName="flyout"
                                    Storyboard.TargetProperty="(Grid.Width)" 
                                    From="120" To="0" Duration="0:0:1" AutoReverse="False"/> 
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </Button.Triggers>
            </Button>
        </Grid>
</Grid>

请注意,按钮"Out"可以在移动时单击.它可能应该被禁用.我只是这样做,因为我想在xaml中做到这一点简单.当然你可以使用mahapps.或者你可以像在MahApps中那样快速地制作它,并且不可能两次点击它.:)我看过MahApps FlyOutDemo,我的解决方案对我来说简单得多.而且我不需要第三方库.