设计ListPicker Blend/Xaml

Question

我正在使用ListPicker,但很难让设计工作.我已经包括了我做过的测试:

 <ControlTemplate x:Key="listpicker_style" TargetType="toolkit:ListPicker">
        <StackPanel>
            <VisualStateManager.VisualStateGroups>
                <VisualStateGroup x:Name="PickerStates">
                    <VisualState x:Name="Normal"/>
                    <VisualState x:Name="Highlighted">
                        <Storyboard>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="UserControl"
                                Storyboard.TargetProperty="Foreground"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource PhoneTextBoxForegroundBrush}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="Border"
                                Storyboard.TargetProperty="Background"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource PhoneTextBoxEditBackgroundColor}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="Border"
                                Storyboard.TargetProperty="BorderBrush"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource PhoneTextBoxEditBorderBrush}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                    <VisualState x:Name="Disabled">
                        <Storyboard>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="Border"
                                Storyboard.TargetProperty="Background"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource TransparentBrush}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="Border"
                                Storyboard.TargetProperty="BorderBrush"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource PhoneDisabledBrush}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                            <ObjectAnimationUsingKeyFrames
                                Storyboard.TargetName="UserControl"
                                Storyboard.TargetProperty="Foreground"
                                Duration="0">
                                <DiscreteObjectKeyFrame
                                    Value="{StaticResource PhoneDisabledBrush}"
                                    KeyTime="0"/>
                            </ObjectAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>
            <ContentControl
                Content="{TemplateBinding Header}"
                ContentTemplate="{TemplateBinding HeaderTemplate}"
                Foreground="{StaticResource PhoneSubtleBrush}"
                FontSize="{StaticResource PhoneFontSizeNormal}"
                HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                Margin="0 0 0 8"/>
            <Grid>
                <Rectangle Fill="#FFEAC726" HorizontalAlignment="Left" Height="52" Margin="0,0,-7,0" Stroke="Black" VerticalAlignment="Top" Width="83"/>
                <Rectangle Fill="#FF685B1F" HorizontalAlignment="Left" Height="9" Margin="0,0,-7,0" Stroke="Black" VerticalAlignment="Top" Width="83"/>
                <Rectangle Fill="#FF685B1F" HorizontalAlignment="Left" Height="9" Margin="0,43,-7,0" Stroke="Black" VerticalAlignment="Top" Width="83"/>
                <Border x:Name="Border"
                    Background="{TemplateBinding Background}"
                    BorderBrush="{TemplateBinding BorderBrush}"
                    BorderThickness="{TemplateBinding BorderThickness}" Opacity="0">
                    <UserControl x:Name="UserControl" Foreground="{TemplateBinding Foreground}" Margin="7,-3,-7,3">
                        <StackPanel>
                            <TextBlock x:Name="MultipleSelectionModeSummary" Margin="8 8 0 8" />
                            <Canvas x:Name="ItemsPresenterHost" MinHeight="46">
                                <ItemsPresenter x:Name="ItemsPresenter">
                                    <ItemsPresenter.RenderTransform>
                                        <TranslateTransform x:Name="ItemsPresenterTranslateTransform"/>
                                    </ItemsPresenter.RenderTransform>
                                </ItemsPresenter>
                            </Canvas>
                        </StackPanel>
                    </UserControl>
                </Border>
            </Grid>
        </StackPanel>
    </ControlTemplate>

基本上我想要实现的是创建一个看起来像滚动的listpicker.单击它时,滚动会展开并显示整个选项.因此我对使用全屏外观不感兴趣.

我也做了其他类似的不成功的尝试,我使用设计的usercontrols作为动画的顶部和底部的卷轴.但是listpicker的设计是不可能的.

因此,我的问题是,如果某人有listpicker的设计,使用usercontrols,这样我可以覆盖它们,或者如果你可以指导我如何正确操作listpicker.我使用了混合,experssion设计,Illustrator和XAML,所以任何使用它们中的任何一个设计listpicker的方法都将非常感激!

视觉示例

所以这个想法是这样的:

这样文本在滚动内部,当你单击它时,滚动扩展,里面有一个列表,你可以滚动选择元素.

用户控件

用户控制滚动

图为概述

所选项目:

单击元素,将出现一个列表:

这就是listpicker的工作原理我想把它设计成一个滚动,无论是从头开始还是使用工具listpicker描述,都是我正在寻找的.然而,我没有成功地扩大外观.

Answer 1

我已尽力使其变得最简单。其想法如下：平移和缩放属性在状态之间进行动画处理，而其他属性（例如高度等）则不会。因此，让我们创建如下所示的布局：

 <StackPanel Width="500">
        <Grid x:Name="HeaderGrid" Height="100" Background="Red" Tapped="HeaderGrid_Tapped"/>
        <Grid VerticalAlignment="Top" x:Name="ContentGrid" Height="400" Background="BlanchedAlmond" RenderTransformOrigin="0.5,0">
            <Grid.RenderTransform>
                <CompositeTransform/>
            </Grid.RenderTransform>
            <ScrollViewer>
                <ItemsControl>
                    <ItemsControl.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding}" Tapped="TextBlock_Tapped"/>
                        </DataTemplate>
                    </ItemsControl.ItemTemplate>
                    <ItemsControl.Items>
                        <x:String>One</x:String>
                        <x:String>Two</x:String>
                        <x:String>Three</x:String>
                    </ItemsControl.Items>
                </ItemsControl>
            </ScrollViewer>
        </Grid>
        <Grid x:Name="BottomGrid" Height="100" Background="Red" Tapped="HeaderGrid_Tapped" RenderTransformOrigin="0.5,0.5">
            <Grid.RenderTransform>
                <CompositeTransform/>
            </Grid.RenderTransform>
        </Grid>
    </StackPanel>

现在让我们向页面、控件或您需要的内容添加一些视觉状态

<VisualStateManager.VisualStateGroups>
        <VisualStateGroup x:Name="VisualStateGroup">
            <VisualStateGroup.Transitions>
                <VisualTransition GeneratedDuration="0:0:0.5"/>
            </VisualStateGroup.Transitions>
            <VisualState x:Name="Expanded"/>
            <VisualState x:Name="Collapsed">
                <Storyboard>
                    <DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.ScaleY)" Storyboard.TargetName="ContentGrid" d:IsOptimized="True"/>
                    <DoubleAnimation Duration="0" To="-400" Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateY)" Storyboard.TargetName="BottomGrid" d:IsOptimized="True"/>
                </Storyboard>
            </VisualState>
        </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>

最后是状态改变的代码隐藏

private void HeaderGrid_Tapped(object sender, TappedRoutedEventArgs e)
    {
        CheckState();
    }
    private void TextBlock_Tapped(object sender, TappedRoutedEventArgs e)
    {
        var value = (sender as FrameworkElement).DataContext;

        CheckState();
    }
    private void CheckState()
    {
        if ((ContentGrid.RenderTransform as CompositeTransform).ScaleY > 0)
            VisualStateManager.GoToState(this, "Collapsed", true);
        else
            VisualStateManager.GoToState(this, "Expanded", true);
    }

现在您可以在文本出现和消失时添加淡入淡出，以及更改图像的颜色等。但这个想法已经解决了。