LongListMultiSelector Aligning CENTER CheckBox list item - windows-phone-8

Question

I have a LongListMultiSelector with list items.
this is XAML code
<myclass:LongListMultiSelector x:Name="lstAudio"
HideEmptyGroups="True"
VerticalContentAlignment="Center"
ItemsSource="{Binding Audio}"
LayoutMode="List"
SelectedItems="{Binding SelectedAudioRegistrations, Mode=TwoWay}"
IsSelectionEnabled="{Binding LongListMultiSelector_IsSelectionEnabled}">
<myclass:LongListMultiSelector.ItemTemplate>
<DataTemplate>
<Grid cal:Message.Attach="[Event Tap] = [Action OnSelectionChangedCommand($dataContext)]" Margin="-35,0,0,0">
<Grid.RowDefinitions>
<RowDefinition Height="76"/>
<RowDefinition Height="15"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="76" />
<ColumnDefinition Width="280" />
<ColumnDefinition Width="120" />
</Grid.ColumnDefinitions>
<Image Source="/icon/image76.png" Width="76" Height="76" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Center" />
<TextBlock Text="{Binding Name}" Grid.Column="1" Grid.Row="0" TextWrapping="Wrap" VerticalAlignment="Center" />
<TextBlock Text="{Binding Duration, Converter={StaticResource SecondsToTimeConverter}}" Grid.Column="2" Grid.Row="0" TextWrapping="Wrap" VerticalAlignment="Center" />
</Grid>
</DataTemplate>
</myclass:LongListMultiSelector.ItemTemplate>
</myclass:LongListMultiSelector>
If I enabled "IsSelectionEnabled" it shows the checkbox but not alignment on vertical
this a image
I would like to align checkbox on CENTER. How?
Thank you

Answer 1

I think I can help you :)
Here is the style of LongListMultiSelectorItem I am able move the Checkbox and Background Color. So I think now you can play with its margin property and set it accordingly.
<Style x:Key="LongListMultiSelectorItemListStyle" TargetType="toolkit:LongListMultiSelectorItem">
<Setter Property="Background" Value="{StaticResource PhoneAccentBrush}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="toolkit:LongListMultiSelectorItem">
<Grid MinHeight="52">
<Grid.Resources>
<ExponentialEase EasingMode="EaseIn" Exponent="8" x:Key="ExponentialEaseIn"/>
<QuadraticEase EasingMode="EaseOut" x:Key="QuadraticEaseOut"/>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionEnabledStates">
<VisualStateGroup.Transitions>
<VisualTransition x:Name="ClosedToExposed"
From="Closed" To="Exposed"
GeneratedDuration="0:0:0.30">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="OuterHintPanel">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="0.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.30" Value="1.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualTransition>
<VisualTransition x:Name="ExposedToClosed"
From="Exposed" To="Closed"
GeneratedDuration="0:0:0.30">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="OuterHintPanel">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="1.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.30" Value="0.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</VisualTransition>
<VisualTransition x:Name="ExposedToOpened"
From="Exposed" To="Opened"
GeneratedDuration="0:0:0.30">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="SelectBox">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="-58" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="0" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="Presenter">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="24" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="86" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="OuterHintPanel">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="1.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.30" Value="0.0" EasingFunction="{StaticResource QuadraticEaseOut}"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SelectBox">
<DiscreteObjectKeyFrame KeyTime="0:0:0.0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="OuterHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="InnerHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualTransition>
<VisualTransition x:Name="ClosedToOpened"
From="Closed" To="Opened"
GeneratedDuration="0:0:0.15">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="SelectBox">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="-58" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="0" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="Presenter">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="24" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="86" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SelectBox">
<DiscreteObjectKeyFrame KeyTime="0:0:0.0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="OuterHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="InnerHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualTransition>
<VisualTransition x:Name="OpenedToClosed"
From="Opened" To="Closed"
GeneratedDuration="0:0:0.15">
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="SelectBox">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="0" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="-58" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="Presenter">
<EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="86" EasingFunction="{StaticResource ExponentialEaseIn}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.15" Value="24" EasingFunction="{StaticResource ExponentialEaseIn}"/>
</DoubleAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SelectBox">
<DiscreteObjectKeyFrame KeyTime="0:0:0.15" Value="Collapsed"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Closed"/>
<VisualState x:Name="Exposed">
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="OuterHintPanel"
Duration="0" To="1.0"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Opened">
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="SelectBox"
Duration="0" To="0"/>
<DoubleAnimation Storyboard.TargetProperty="(UIElement.RenderTransform).(CompositeTransform.TranslateX)"
Storyboard.TargetName="Presenter"
Duration="0" To="86"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="SelectBox">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
Storyboard.TargetName="OuterCover">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="Visible"/>
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetProperty="(UIElement.Opacity)"
Storyboard.TargetName="OuterHintPanel"
Duration="0" To="0.0"/>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="OuterHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)"
Storyboard.TargetName="InnerHintPanel">
<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="False"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid Grid.Column="0" HorizontalAlignment="Stretch" toolkitPrimitives:ClipToBounds.IsEnabled="True">
<ContentPresenter x:Name="Presenter">
<ContentPresenter.RenderTransform>
<CompositeTransform TranslateX="24"/>
</ContentPresenter.RenderTransform>
</ContentPresenter>
</Grid>
<Rectangle x:Name="InnerHintPanel" Grid.Column="0" Width="24"
Height="{TemplateBinding HintPanelHeight}"
HorizontalAlignment="Left"
Fill="Transparent"
StrokeThickness="0">
<Rectangle.RenderTransform>
<CompositeTransform TranslateX="24"/>
</Rectangle.RenderTransform>
</Rectangle>
<ContentControl x:Name="InfoPresenter" Grid.Column="1"
VerticalAlignment="Top"
Content="{TemplateBinding ContentInfo}"
ContentTemplate="{TemplateBinding ContentInfoTemplate}"/>
</Grid>
<Rectangle x:Name="OuterHintPanel" Width="24"
HorizontalAlignment="Left"
Height="{TemplateBinding HintPanelHeight}"
Fill="{TemplateBinding Background}"
StrokeThickness="0" Opacity="0.0"/>
<Grid x:Name="OuterCover" IsHitTestVisible="True"
Visibility="Collapsed" Background="Transparent"/>
<Canvas HorizontalAlignment="Left">
<CheckBox x:Name="SelectBox" VerticalAlignment="Bottom" Visibility="Collapsed" Background="Green"
IsChecked="{Binding IsSelected, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
<CheckBox.RenderTransform>
<CompositeTransform TranslateX="-58"/>
</CheckBox.RenderTransform>
</CheckBox>
</Canvas>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Now set to LongListMultiSelector:-
<toolkit:LongListMultiSelector x:Name="PhotoHubLLS" Height="435" VerticalAlignment="Top"
IsGroupingEnabled="False"
GridCellSize="106,106"
LayoutMode="List"
ItemTemplate="{StaticResource ItemTemplate}"
HideEmptyGroups="False"
IsSelectionEnabled="True" ItemContainerStyle="{StaticResource LongListMultiSelectorItemListStyle}" >
</toolkit:LongListMultiSelector>
hope it help you :) any query just comment.