I have a WPF Listview, and I have overridden the ListView.ItemTemplate to change the background color of the items on the ListViewItem.IsMouseOver event like so:
<AlternationConverter x:Key="BackgroundConverter">
<SolidColorBrush>White</SolidColorBrush>
<SolidColorBrush>
<SolidColorBrush.Color>
<Color A="242" R="242" G="242" B="242" />
</SolidColorBrush.Color>
</SolidColorBrush>
</AlternationConverter>
<Style x:Key="alternatingWithBinding" TargetType="{x:Type ListViewItem}">
<Setter Property="Height" Value="31"/>
<Setter Property="Background"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(ItemsControl.AlternationIndex),
Converter={StaticResource BackgroundConverter}}"/>
<Style.Triggers>
<Trigger Property="ListViewItem.IsSelected" Value="True">
<Setter Property="ListViewItem.Background" Value="Yellow" />
</Trigger>
<Trigger Property="ListBoxItem.IsMouseOver" Value="True">
<Setter Property="ListBoxItem.Background" Value="Blue" />
</Trigger>
</Style.Triggers>
</Style>
What I'm trying to achieve is to have a different color when hovered over the already selected item (which is yellow). So on all the items it will be a Blue hover-over, and on the selected Yellow item, it'll be green.
I tried the below attempt, using MultiTrigger, but that didn't do the trick:
<Style x:Key="alternatingWithBinding" TargetType="{x:Type ListViewItem}">
<Setter Property="Height" Value="31"/>
<Setter Property="Background"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(ItemsControl.AlternationIndex),
Converter={StaticResource BackgroundConverter}}"/>
<Style.Triggers>
<Trigger Property="ListViewItem.IsSelected" Value="True">
<Setter Property="ListViewItem.Background" Value="Yellow" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="ListBoxItem.IsMouseOver" Value="True"/>
<Condition Property="ListBoxItem.IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="ListBoxItem.Background" Value="Green" />
</MultiTrigger>
<Trigger Property="ListBoxItem.IsMouseOver" Value="True">
<Setter Property="ListBoxItem.Background" Value="Blue" />
</Trigger>
</Style.Triggers>
</Style>
Any ideas?
Thanks.
Are the triggers are applied in order? It might work if you move the MultiTrigger to the bottom, then it will apply after the IsMouseOver Trigger.
Related
Want two scenarios as below:
1. Default color as Green for all items
2. On mouse over, that one item only should be Green and all other items should turn to Yellow at same time.
<ListView Name="ListViewDisplay" Grid.Row="1" ItemsSource="{Binding ListItems}" Background="Green" >
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Background" Value="Green"/>
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True" />
</MultiTrigger.Conditions>
<MultiTrigger.Setters>
<Setter Property="Background" Value="Green" />
</MultiTrigger.Setters>
</MultiTrigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="False" />
</MultiTrigger.Conditions>
<MultiTrigger.Setters>
<Setter Property="Background" Value="Yellow" />
</MultiTrigger.Setters>
</MultiTrigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>
With this code all items are always in yellow color.
I have some TabItems, each one containg one image and a textblock. Here is the code:
<TabItem.Header>
<ContentControl>
<ContentControl.Template>
<ControlTemplate>
<StackPanel x:Name="sp" Orientation="Horizontal">
<Image x:Name="img" Source="img0.png"/>
<TextBlock x:Name="tb" Text="Tab1" VerticalAlignment="Center" Foreground="Green"/>
</StackPanel>
<ControlTemplate.Triggers>
<Trigger Property="TabItem.IsSelected" Value="True">
<Setter TargetName="img" Property="Source" Value="img1.png" />
<Setter TargetName="tb" Property="Foreground" Value="Red" />
<Setter Property="FontWeight" Value="Bold"/>
</Trigger>
<Trigger SourceName="sp" Property="IsMouseOver" Value="True">
<Setter TargetName="img" Property="Source" Value="img1.png" />
<Setter TargetName="tb" Property="Foreground" Value="Red" />
<Setter Property="FontWeight" Value="Bold"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</ContentControl.Template>
</ContentControl>
What I'm trying to achieve is to change the image's source and textblock's foreground value when the TabItem is selected. The IsMouseOver behaviour is working properly but the TabItem.IsSelected is not working as expected.
Basically this code is not doing what I'm thinking it should do:
<Trigger Property="TabItem.IsSelected" Value="True">
<Setter TargetName="img" Property="Source" Value="img1.png" />
<Setter TargetName="tb" Property="Foreground" Value="Red" />
<Setter Property="FontWeight" Value="Bold"/>
Please share your opinion.
Thank you.
You are trying to reach the IsSelected property of the TabItem from the TabItem.Header and that can't be accomplished with an ordinary Trigger. Instead, you need to use a DataTrigger so that you can Bind to the IsSelected property with a RelativeSource Binding:
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=
{x:Type TabItem}}}" Value="True">
<Setter TargetName="img" Property="Source"
Value="/WpfApplication1;component/Images/Tulips.jpg" />
<Setter TargetName="tb" Property="Foreground" Value="Red" />
<Setter Property="TextElement.FontWeight" Value="Bold"/>
</DataTrigger>
I have the following DataTrigger in a WPF form:
<CheckBox IsChecked="{Binding ConcentratorViewModel.Integrated}">
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Margin" Value="0,10,0,0"/>
<Setter Property="Width" Value="20"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<!--<Setter Property="IsEnabled" Value="False"/>-->
<!--<Setter Property="IsChecked" Value="False"/>-->
<Style.Triggers>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}" Value="ZIV">
<Setter Property="Background" Value="Red"/>
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}" Value="Landis+Gyr">
<Setter Property="IsChecked" Value="False"/>
</DataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>
The CheckBox must be Checked or Unchecked depending on the selected manufacturer. I added a converter to see the value on the trigger and it's correct. I've also added the Background property and it changes correctly, but the IsChecked doesn't work.
Well you need to move the IsChecked Binding inside the Style. Setting it directly on the Checkbox gives it precedence and the Trigger's cannot change that value.
So something like:
<CheckBox>
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Margin"
Value="0,10,0,0" />
<Setter Property="Width"
Value="20" />
<Setter Property="VerticalAlignment"
Value="Center" />
<Setter Property="IsChecked"
Value="{Binding ConcentratorViewModel.Integrated}" />
<Style.Triggers>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}"
Value="ZIV">
<Setter Property="Background"
Value="Red" />
<Setter Property="IsChecked"
Value="True" />
</DataTrigger>
<DataTrigger Binding="{Binding ConcentratorViewModel.Manufacturer}"
Value="Landis+Gyr">
<Setter Property="IsChecked"
Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</CheckBox.Style>
</CheckBox>
Note:
Remember by doing this, your Binding only applies when the DataTrigger's do not evaluate to "True". Thus if your Manufacturer property is "ZIV" or "Landis+Gyr" then your Integrated property is not going to see any CheckBox updates even with a TwoWay binding as it just isn't being used.
I created a style for a hyperlink control:
<Style x:Key="MyHyperlink" TargetType="{x:Type Hyperlink}">
<Setter Property="Foreground" Value="{StaticResource HyperlinkBrush}" />
<Setter Property="IsEnabled" Value="{Binding IsEnabled,RelativeSource={RelativeSource AncestorType={x:Type FrameworkElement}}}" />
<Style.Triggers>
<Trigger Property="IsEnabled" Value="True">
<Setter Property="Cursor" Value="Hand"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="True" >
<Setter Property="Foreground" Value="{StaticResource HyperlinkMouseOverBrush}" />
</Trigger>
</Style.Triggers>
</Style>
How can I use this style in a DataGridHyperlinkColumn?
The ElementStyle of this kind of column asks for a TextBlock style instead of an Hyperlink one...
<DataGridHyperlinkColumn EditingElementStyle="{StaticResource MyDataGridTextColumn}" ElementStyle="{StaticResource MyDataGridHyperlinkColumn}"
Header="WebSite" Binding="{Binding Site, NotifyOnValidationError=True,ValidatesOnDataErrors=True}" />
Remove the x:Key from your style and put it in DataGrid.Resources then it targets all Hyperlink controls within this DataGrid.
I have a list box with defined DataTemplate, Style and ItemContainerStyle.
This list box have SelectionMode="Single".
Initially all Items have Opacity="0.7", when Item selected I make it Opacity="1"
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Style.Setters>
<Setter Property="Opacity" Value="0.7"/>
</Style.Setters>
<Style.Triggers>
<DataTrigger Binding="{Binding IsEventLocked}" Value="False">
<Setter Property="IsEnabled" Value="False"/>
<Setter Property="Opacity" Value="0.2"/>
</DataTrigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Opacity" Value="1"/>
</Trigger>
</Style.Triggers>
</Style>
But I also need make all other (unselected) items with Opacity="0.2" until Selected item will be unselected.
In short: [Initial (Opacity=0.7)]->[ItemSelected = {(SelectedItem:Opacity=1), (All Unselected items: Opacity=0.2)}]->[Item Deselected (SelectedItem==null) =(Opasity=0.7)]
Thanks for syggestions and ideas!
Trigger on: Selection being there && not being selected oneself.
This should do:
<Style TargetType="ListBoxItem">
<Setter Property="Opacity" Value="0.7" />
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource Self}}"
Value="false" />
<Condition
Binding="{Binding SelectedItems.Count, RelativeSource={RelativeSource AncestorType=ListBox}}"
Value="1" />
</MultiDataTrigger.Conditions>
<Setter Property="Opacity" Value="0.2" />
</MultiDataTrigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Opacity" Value="1" />
</Trigger>
</Style.Triggers>
</Style>