Question

我正在撰写 UWP应用。

我将 SplitView （用于汉堡包）添加到页面。

在 SplitView窗格中，我有两个项目：

SellButtonGrid
SellButtonGridAlternate

以上两项的可见性取决于两个条件：

最低520 Windows高度
和SplitViewPane已打开或关闭。

这意味着4个案例：

Windows高度低于520且splitviewpane已关闭


Windows高度小于520，splitviewpane打开



Windows高度大于520且splitviewpane已关闭


Windows高度大于520且splitviewpane打开

对于splitview打开或关闭，我使用：

<VisualState x:Name="SplitViewOpen">
  <VisualState.StateTriggers>
  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen}" />
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Visible" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Collapsed" />
  </VisualState.Setters>
</VisualState>
<VisualState x:Name="SplitViewClosed">
  <VisualState.StateTriggers>
  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen, Converter={StaticResource BooleanNegationConverter}}" />
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
  </VisualState.Setters>
</VisualState>

为了检测低于或高于520的高度，我使用：

<VisualState x:Name="SmallHeight">
  <VisualState.StateTriggers>
  <AdaptiveTrigger MinWindowHeight="0" />
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
  </VisualState.Setters>
</VisualState>
<VisualState x:Name="LargeHeight">
  <VisualState.StateTriggers>
  <AdaptiveTrigger MinWindowHeight="520" />
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Visible" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Collapsed" />
  </VisualState.Setters>
</VisualState>

但是，结果不是我的预期。如何合并这些视觉状态??

我尝试使用： http://dotnetbyexample.blogspot.in/2016/02/an-adaptivetrigger-that-works-with.html

我使用上面的解决方案，所以： 我的返工代码：

xmlns:Utils="using:DellApp.Utils"
xmlns:converters="using:DellApp.Converters"
xmlns:windowsStateTriggers="using:WindowsStateTriggers"

新创建的州：

  <VisualState.StateTriggers>
  <windowsStateTriggers:CompositeStateTrigger>
  <Utils:AdaptiveTrigger MinWindowHeight="520" MaxWindowHeight="18000" />

  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen,
  Converter={StaticResource BooleanNegationConverter}}" />
  </windowsStateTriggers:CompositeStateTrigger>
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
  </VisualState.Setters>
</VisualState>

<VisualState x:Name="SplitViewCollapsed_SmallHeight">
  <VisualState.StateTriggers>
  <windowsStateTriggers:CompositeStateTrigger>
  <Utils:AdaptiveTrigger MaxWindowHeight="519"
  MinWindowHeight="0" />
  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen,
  Converter={StaticResource BooleanNegationConverter}}" />
  </windowsStateTriggers:CompositeStateTrigger>
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
  </VisualState.Setters>
</VisualState>

<VisualState x:Name="SplitViewOpen_SmallHeight">
  <VisualState.StateTriggers>
  <windowsStateTriggers:CompositeStateTrigger>
  <Utils:AdaptiveTrigger MaxWindowHeight="519"
  MinWindowHeight="0" />
  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen}" />
  </windowsStateTriggers:CompositeStateTrigger>
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
  </VisualState.Setters>
</VisualState>

<VisualState x:Name="SplitViewOpen_LargeHeight">
  <VisualState.StateTriggers>
  <windowsStateTriggers:CompositeStateTrigger>
  <Utils:AdaptiveTrigger MinWindowHeight="520" MaxWindowHeight="18000"/>
  <StateTrigger IsActive="{Binding ElementName=LayoutSplitView,
  Path=IsPaneOpen}" />
  </windowsStateTriggers:CompositeStateTrigger>
  </VisualState.StateTriggers>
  <VisualState.Setters>
  <Setter Target="SellButtonGrid.Visibility" Value="Visible" />
  <Setter Target="SellButtonGridAlternate.Visibility" Value="Collapsed" />
  </VisualState.Setters>
</VisualState>

所以，我做的是，我添加了CompositeStateTrigger from WindowsStateTriggers，但我无法触发它。

Answer 1

我根据你的代码制作了一个演示并重现了这个问题。经过研究，我发现了以下问题：

Binding不适用于StateTrigger。但x:Bind效果很好，因此您可以使用x:Bind，而不要忘记为Mode=OneWay指定x:Bind。
Operator="And"需要在windowsStateTriggers:CompositeStateTrigger上指定。

所以你的XAML应该修改如下：

<Page.Resources>
    <converter:BooleanNegationConverter x:Name="BooleanNegationConverter" x:Key="BooleanNegationConverter"/>
</Page.Resources>

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <VisualStateManager.VisualStateGroups>
        <VisualStateGroup>
            <VisualState>
                <VisualState.StateTriggers>
                <windowsStateTriggers:CompositeStateTrigger Operator="And">//use Operator='And' here
                        <Utils:AdaptiveTrigger MinWindowHeight="520" MaxWindowHeight="18000" />
                        <StateTrigger IsActive="{x:Bind LayoutSplitView.IsPaneOpen,Mode=OneWay,Converter={StaticResource BooleanNegationConverter}}" />
                </windowsStateTriggers:CompositeStateTrigger>
            </VisualState.StateTriggers>
            <VisualState.Setters>
                <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
                <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
            </VisualState.Setters>
            </VisualState>

            <VisualState x:Name="SplitViewCollapsed_SmallHeight">
                <VisualState.StateTriggers>
                    <windowsStateTriggers:CompositeStateTrigger Operator="And">
                        <Utils:AdaptiveTrigger MaxWindowHeight="519" MinWindowHeight="0" />
                        <StateTrigger IsActive="{x:Bind LayoutSplitView.IsPaneOpen,Mode=OneWay,Converter={StaticResource BooleanNegationConverter}}" />
                    </windowsStateTriggers:CompositeStateTrigger>
                </VisualState.StateTriggers>
                <VisualState.Setters>
                    <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
                    <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
                </VisualState.Setters>
            </VisualState>

            <VisualState x:Name="SplitViewOpen_SmallHeight">
                <VisualState.StateTriggers>
                    <windowsStateTriggers:CompositeStateTrigger Operator="And">
                        <Utils:AdaptiveTrigger MaxWindowHeight="519" MinWindowHeight="0" />
                        <StateTrigger IsActive="{x:Bind LayoutSplitView.IsPaneOpen}" />
                    </windowsStateTriggers:CompositeStateTrigger>
                </VisualState.StateTriggers>
                <VisualState.Setters>
                    <Setter Target="SellButtonGrid.Visibility" Value="Collapsed" />
                    <Setter Target="SellButtonGridAlternate.Visibility" Value="Visible" />
                </VisualState.Setters>
            </VisualState>

            <VisualState x:Name="SplitViewOpen_LargeHeight">
                <VisualState.StateTriggers>
                    <windowsStateTriggers:CompositeStateTrigger Operator="And">
                        <Utils:AdaptiveTrigger MinWindowHeight="520" MaxWindowHeight="18000"/>
                        <StateTrigger IsActive="{x:Bind LayoutSplitView.IsPaneOpen}" />
                    </windowsStateTriggers:CompositeStateTrigger>
                </VisualState.StateTriggers>
                <VisualState.Setters>
                    <Setter Target="SellButtonGrid.Visibility" Value="Visible" />
                    <Setter Target="SellButtonGridAlternate.Visibility" Value="Collapsed" />
                </VisualState.Setters>
            </VisualState>
        </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>

以下是我制作的示例：AdaptiveTriggerSample

如何在UWP App中使用此AdaptiveTrigger

1 个答案: