[C#/WINUI3/COMMUNITY TOOLKIT/.NET8] CompareStateTrigger 엘리먼트 : Comparison/Value/To 속성을 사용해 값 상태에 따라 처리하기

■ CompareStateTrigger 엘리먼트의 Comparison/Value/To 속성을 사용해 값 상태에 따라 처리하는 방법을 보여준다.

※ 비주얼 스튜디오에서 TestProject(Unpackaged) 모드로 빌드한다.
※ TestProject.csproj 프로젝트 파일에서 WindowsPackageType 태그를 None으로 추가했다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ctw="using:CommunityToolkit.WinUI"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup>
                <VisualState x:Name="Less">
                    <VisualState.StateTriggers>
                        <ctw:CompareStateTrigger
                            Comparison="LessThan"
                            Value="{Binding Value, ElementName=slider1, Mode=OneWay}"
                            To="3" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter
                            Target="statusTextBlock1.Text"
                            Value="Slider value is less than 3" />
                    </VisualState.Setters>
                </VisualState>
                <VisualState x:Name="Equal">
                    <VisualState.StateTriggers>
                        <ctw:CompareStateTrigger
                            Comparison="Equal"
                            Value="{Binding Value, ElementName=slider1, Mode=OneWay}"
                            To="3" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter
                            Target="statusTextBlock1.Text"
                            Value="Slider value is 3" />
                    </VisualState.Setters>
                </VisualState>
                <VisualState x:Name="Greater">
                    <VisualState.StateTriggers>
                        <ctw:CompareStateTrigger
                            Comparison="GreaterThan"
                            Value="{Binding Value, ElementName=slider1, Mode=OneWay}"
                            To="3" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter
                            Target="statusTextBlock1.Text"
                            Value="Slider value is greater than 3" />
                    </VisualState.Setters>
                </VisualState>
            </VisualStateGroup>
            <VisualStateGroup>
                <VisualState x:Name="GreaterThanOrEqual">
                    <VisualState.StateTriggers>
                        <ctw:CompareStateTrigger
                            Comparison="GreaterThanOrEqual"
                            Value="{Binding Value, ElementName=slider2, Mode=OneWay}"
                            To="4" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter
                            Target="statusTextBlock2.Text"
                            Value="Slider value is 4 or greater" />
                    </VisualState.Setters>
                </VisualState>
                <VisualState x:Name="LessThanOrEqual">
                    <VisualState.StateTriggers>
                        <ctw:CompareStateTrigger
                            Comparison="LessThanOrEqual"
                            Value="{Binding Value, ElementName=slider2, Mode=OneWay}"
                            To="2" />
                    </VisualState.StateTriggers>
                    <VisualState.Setters>
                        <Setter
                            Target="statusTextBlock2.Text"
                            Value="Slider value is 2 or less" />
                    </VisualState.Setters>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <StackPanel
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            MaxWidth="400">
            <Slider Name="slider1"
                Width="300"
                Minimum="0"
                Maximum="5" />
            <TextBlock Name="statusTextBlock1"
                Style="{StaticResource CaptionTextBlockStyle}"
                Margin="0 10 0 0"
                Text="If you see this, trigger isn't working" />
            <Slider Name="slider2"
                Width="300"
                Margin="0 30 0 0"
                Minimum="0"
                Maximum="5" />
            <TextBlock Name="statusTextBlock2"
                Style="{StaticResource CaptionTextBlockStyle}"
                Margin="0 10 0 0"
                Text="Slider value is 3" />
        </StackPanel>
    </Grid>
</Page>

100

101

102

103

104

105

106

<?xml version="1.0" encoding="utf-8"?>

<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:ctw="using:CommunityToolkit.WinUI"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<Grid>

<VisualStateManager.VisualStateGroups>

<VisualState.StateTriggers>

<ctw:CompareStateTrigger

Comparison="LessThan"

Value="{Binding Value, ElementName=slider1, Mode=OneWay}"

To="3" />

</VisualState.StateTriggers>

<VisualState.Setters>

<Setter

Target="statusTextBlock1.Text"

Value="Slider value is less than 3" />

</VisualState.Setters>

</VisualState>

<VisualState.StateTriggers>

<ctw:CompareStateTrigger

Comparison="Equal"

Value="{Binding Value, ElementName=slider1, Mode=OneWay}"

To="3" />

</VisualState.StateTriggers>

<VisualState.Setters>

<Setter

Target="statusTextBlock1.Text"

Value="Slider value is 3" />

</VisualState.Setters>

</VisualState>

<VisualState.StateTriggers>

<ctw:CompareStateTrigger

Comparison="GreaterThan"

Value="{Binding Value, ElementName=slider1, Mode=OneWay}"

To="3" />

</VisualState.StateTriggers>

<VisualState.Setters>

<Setter

Target="statusTextBlock1.Text"

Value="Slider value is greater than 3" />

</VisualState.Setters>

</VisualState>

</VisualStateGroup>

<VisualState.StateTriggers>

<ctw:CompareStateTrigger

Comparison="GreaterThanOrEqual"

Value="{Binding Value, ElementName=slider2, Mode=OneWay}"

To="4" />

</VisualState.StateTriggers>

<VisualState.Setters>

<Setter

Target="statusTextBlock2.Text"

Value="Slider value is 4 or greater" />

</VisualState.Setters>

</VisualState>

<VisualState.StateTriggers>

<ctw:CompareStateTrigger

Comparison="LessThanOrEqual"

Value="{Binding Value, ElementName=slider2, Mode=OneWay}"

To="2" />

</VisualState.StateTriggers>

<VisualState.Setters>

<Setter

Target="statusTextBlock2.Text"

Value="Slider value is 2 or less" />

</VisualState.Setters>

</VisualState>

</VisualStateGroup>

</VisualStateManager.VisualStateGroups>

<StackPanel

HorizontalAlignment="Center"

VerticalAlignment="Center"

MaxWidth="400">

<Slider Name="slider1"

Width="300"

Minimum="0"

Maximum="5" />

<TextBlock Name="statusTextBlock1"

Style="{StaticResource CaptionTextBlockStyle}"

Margin="0 10 0 0"

Text="If you see this, trigger isn't working" />

<Slider Name="slider2"

Width="300"

Margin="0 30 0 0"

Minimum="0"

Maximum="5" />

<TextBlock Name="statusTextBlock2"

Style="{StaticResource CaptionTextBlockStyle}"

Margin="0 10 0 0"

Text="Slider value is 3" />

</StackPanel>

</Grid>

</Page>

TestProject.zip