Hi I want to apply a style names "DataColumnStyle" on a column "colA" in my radgridview if an other column "colB" is invisble but I didn't find how to acces to the visibility of "colB".
<Style x:Key="DataColumnStyle"
TargetType="telerik:GridViewCell">
<Setter Property="ToolTip"
Value="{Binding BienEtService.PolitiquePrixBes.PrixVenteTTC,
Mode=OneWay,
StringFormat='{}{0:0.00 €}'}" />
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource Self},
Path=IsVisible}"
Value="True" />
</MultiDataTrigger.Conditions>
<Setter Property="Foreground"
Value="Orange" />
</MultiDataTrigger>
</Style.Triggers>
</Style>
You should be able to bind to the column if you know its index within the Columns collection of the parent RadGridView:
<Condition Binding="{Binding RelativeSource={RelativeSource AncestorType=telerik:RadGridView}, Path=Columns[0].IsVisible}" Value="True" />
You can't bind to it by name though.
Related
I have datagrid in my view and I am trying to trigger a style for the DataGridRowHeader so that it has a particular background when both of the following are true:
IsDirty=True (Property on the DataContext of the row)
IsRowSelected=True (Property on the DataGridRowHeader)
How do I write a multi-trigger that triggers for the above paired conditions as my following style code throws InvalidOperationException/{"Must have non-null value for 'Property'."}:
<Style x:Key="DataGridStandardRowHeaderStyle" TargetType="DataGridRowHeader">
<Style.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Binding="{Binding IsDirty}" Value="True" />
<Condition Property="IsRowSelected" Value="True" />
</MultiTrigger.Conditions>
<Setter Property="Background" Value="LightYellow" />
</MultiTrigger>
</Style.Triggers>
</Style>
Kindly help me out.
The mistake in my style code finally got across to me and the correct one that now works for me is given below:
<Style x:Key="DataGridStandardRowHeaderStyle" TargetType="DataGridRowHeader">
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsDirty}" Value="True" />
<Condition Binding="{Binding IsRowSelected, RelativeSource={RelativeSource Self}}" Value="True" />
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="LightYellow" />
</MultiDataTrigger>
</Style.Triggers>
</Style>
I have a ListView declared as:
<ListView x:Name="Tree"
ItemsSource="{Binding ElementName=This, Path=Some.Path.Values}"
AlternationCount="2"
ScrollViewer.CanContentScroll="False">
and a style defined as
<UserControl.Resources>
<Style TargetType="ListViewItem">
<Style.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="SteelBlue"/>
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Gray"/>
</Style.Resources>
<Style.Triggers>
<Trigger Property="ItemsControl.AlternationIndex" Value="0">
<Setter Property="Background" Value="White" />
</Trigger>
<Trigger Property="ItemsControl.AlternationIndex" Value="1">
<Setter Property="Background" Value="GhostWhite" />
</Trigger>
</Style.Triggers>
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Top" />
<EventSetter Event="Loaded" Handler="ContinueLoading" />
</Style>
This combination produced the original desired behaviour, which is that of alternating background highlights. The new desired behaviour was to change that background color depending on the value of a property of a given ListView item; as such the Style.Triggers was changed to
<Style.Triggers>
<Trigger Property="ItemsControl.AlternationIndex" Value="0">
<Setter Property="Background" Value="White" />
</Trigger>
<Trigger Property="ItemsControl.AlternationIndex" Value="1">
<Setter Property="Background" Value="GhostWhite" />
</Trigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}, Path=(ItemsControl.AlternationIndex)}" Value="0"/>
<Condition Binding="{Binding Converter={x:Static controls:Converters.ObjectType}}" Value="{x:Type client:DocumentEntryTypeA}" />
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="{Binding Converter={x:Static controls:Converters.LightColor}, UpdateSourceTrigger=PropertyChanged, Path=Status}" />
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}, Path=(ItemsControl.AlternationIndex)}" Value="1"/>
<Condition Binding="{Binding Converter={x:Static controls:Converters.ObjectType}}" Value="{x:Type client:DocumentEntryTypeA}" />
</MultiDataTrigger.Conditions>
<Setter Property="Background" Value="{Binding Converter={x:Static controls:Converters.DarkColor}, UpdateSourceTrigger=PropertyChanged, Path=Status}" />
</MultiDataTrigger>
</Style.Triggers>
</UserControl.Resources>
The ObjectType Converter checks that an element is of a given class; the LightColor and DarkColor Converters produce the selected background values depending on the value of the Status property.
The issue with this code is that the binding I use seems to always produce an AlternationIndex value of '0', i.e. the Converter LightColor is used for every entry. In addition to the code above, I have also tried the following bindings with the same result:
<Condition Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ItemsControl}, Path=AlternationIndex}" Value="0"/>
<Condition Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListView}}, Path=(ItemsControl.AlternationIndex)}" Value="0"/>
Based on the examples I've seen most of the solutions don't separate the style from the object; in my case the style is defined separately within UserControl.Resources. However, since using a Trigger works fine, I'm not sure why a DataTrigger does not, or what would be required to get it working.
The first condition in your MultiDataTrigger finds the most recent ContentPresenter, and tries to bind to ContentPresenter.ItemsControl.AlternationIndex, and ItemsControl.AlternationIndex is not a valid property for ContentPresenter.
Try changing that to RelativeSource={RelativeSource Self} so you will be binding to the ItemsControl.AlternationIndex of the current object
I searched and find out I can't set the tooltip in setter.value directly (in a style.xaml file). However I can use static resource to set the tooltip.
My question is, since I need to supply dynamic text for the tooltip, I can't use static resource. How should I do that?
here is my example.
<Style x:Key="ErrorStyleRadius" TargetType="{x:Type FrameworkElement}">
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding (Validation.HasError), RelativeSource={RelativeSource Mode=Self}}" Value="True"/>
<Condition Binding="{Binding (Validation.Errors), RelativeSource={RelativeSource Mode=Self}, Converter={StaticResource IsError}}" Value="True"/>
</MultiDataTrigger.Conditions>
<MultiDataTrigger.Setters>
<Setter Property="ToolTip">
<Setter.Value>
<ToolTip>
<Label Content="{Binding somePropertyHere}"/>
</ToolTip>
</Setter.Value>
</Setter>
<Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorControlTemplateRadiusError}"/>
</MultiDataTrigger.Setters>
</MultiDataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding (Validation.HasError), RelativeSource={RelativeSource Mode=Self}}" Value="True"/>
<Condition Binding="{Binding (Validation.Errors), RelativeSource={RelativeSource Mode=Self}, Converter={StaticResource IsWarning}}" Value="True"/>
</MultiDataTrigger.Conditions>
<MultiDataTrigger.Setters>
<Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors), Converter={StaticResource ValMsg}}"/>
<Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorControlTemplateRadiusWarning}"/>
</MultiDataTrigger.Setters>
</MultiDataTrigger>
</Style.Triggers>
</Style>
for usage, i can use as
<textbox style={staticresource ErrorStyleRadius} text={bind name, validationOnDataError=true}/>
Why don't you try this -
<ToolTip x:Key="MyToolTip"
DataContext={Binding PlacementTarget, RelativeSource={RelativeSource Self}}>
<Label Content="{Binding Text}"/>
</ToolTip>
<Style x:Key="ErrorStyleRadius" TargetType="{x:Type FrameworkElement}">
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding (Validation.HasError), RelativeSource={RelativeSource Mode=Self}}" Value="True"/>
<Condition Binding="{Binding (Validation.Errors), RelativeSource={RelativeSource Mode=Self}, Converter={StaticResource IsError}}" Value="True"/>
</MultiDataTrigger.Conditions>
<MultiDataTrigger.Setters>
<Setter Property="ToolTip" Value={StaticResource MyToolTip}>
</Setter>
<Setter Property="Validation.ErrorTemplate" Value="{StaticResource ErrorControlTemplateRadiusError}"/>
</MultiDataTrigger.Setters>
</MultiDataTrigger>
</Style.Triggers>
</Style>
You can give the property name in StaticResource. It will update the tooltip dynamically.
Also you can set the tooltip from your style if you want to set the text to Validation.Error like this -
<Trigger Property="Validation.HasError" Value="True">
<Setter Property="ToolTip"
Value="{Binding RelativeSource={RelativeSource Self},
Path=(Validation.Errors)[0].ErrorContent}" />
</Trigger>
I generate ListBox menu from XML. I use datatemplate to style the behavior of listboxitems on selection and other states. I need to hide all textblocks in all listboxitems on selection of the item which gets a value ‘retract’ from XML. Now, I am able to hide texblock only in listboxitem which has this value but cannot hide textblocks in other listboxitems. I am wondering if someone can help. Thank you in advance.
<DataTemplate x:Key="ListBoxItemDataTemplate">
<Grid x:Name="DataItem">
<Image x:Name="IconImage" Source="{Binding XPath=#icon}" Height="16" Margin="16,0,0,0" Stretch="None" VerticalAlignment="Center" HorizontalAlignment="Left" />
<TextBlock x:Name="ListboxIemtextBlock" Text="{Binding XPath=#name}" />
<Image x:Name="ArrowImage" Height="10" Source="Resources/Images/arrow_collapsed_grey.png" Visibility="{Binding XPath=#state}"/>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True">
<Setter TargetName="ListboxIemtextBlock" Property="Foreground" Value="White"/>
<Setter TargetName="IconImage" Property="Source" Value="{Binding XPath=#iconSelected}"/>
<Setter TargetName="IconImage" Property="Height" Value="16"/>
<Setter TargetName="ArrowImage" Property="Source" Value="Resources/Images/arrow_collapsed_white.png"/>
</DataTrigger>
<DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True">
<Setter TargetName="ListboxIemtextBlock" Property="Foreground" Value="#FF6dacbe"/>
</DataTrigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True" />
<Condition Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}, Mode=FindAncestor}}" Value="True" />
</MultiDataTrigger.Conditions>
<Setter TargetName="ListboxIemtextBlock" Property="Foreground" Value="White"/>
</MultiDataTrigger>
<DataTrigger Binding="{Binding XPath=#retract}" Value="True" >
<Setter TargetName="ListboxIemtextBlock" Property="Visibility" Value="Hidden"/>
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
It looks like I cannot control the visibility of all texblocks from a datatemplate. I think it should be done in the ListBox style. I was thinking to switch datatemplates with a second datatemplate that does not have texblock at all. I wanted to use multitrigger for conditions with values isSelected and XML-Binding to Binding="{XPath=#retract}. However, I cannot assign XPath binding for multitrigger in Listbox style. Perphaps, you might help to bind it correctly or have a better idea on how to hide texblocks.
<Style x:Key="ListBoxItemContainerStyle" TargetType="{x:Type ListBoxItem}">
<Setter Property="ContentTemplate" Value="{StaticResource ListBoxItemDataTemplate}"/>
<Setter Property="Template" >
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListBoxItem}">
<ContentPresenter x:Name="contentPresenter"/>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true"/>
<Condition Binding="{XPath=#retract}" Value="true"/>
</MultiTrigger.Conditions>
<Setter Property="ContentTemplate" Value="{StaticResource SelectedListBoxItemDataTemplate}"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I populated XML with XMLDataProvider. I reference to xml this way:
<XmlDataProvider x:Key="PagesData" XPath="/Pages" Source="Data/DataSource.xml" />
XML:
<Pages xmlns="">
<page name="Item 1" icon="Resources/Iocn1.png" retract="False" />
<page name="Item 2" icon="Resources/Iocn2.png" retract="False" />
<page name="Item 3" icon="Resources/Iocn3.png" retract="True" /></Pages>
You can bind to the SelectedItem.retract for the Parent ListBox. This is a working example using Path instead of XPath (since I don't have your XML source) but you should be able to get it to work the same way
Add this trigger in the DataTemplate
<DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType={x:Type ListBox}}, Path=SelectedItem.retract}" Value="True" >
<Setter TargetName="ListboxIemtextBlock" Property="Visibility" Value="Hidden"/>
</DataTrigger>
I've been struggling with this code for some time now and can't seem to find any complete answers to my question. I've created a small sample to illustrate the problem:
<ListView >
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Margin="0,0,20,0" IsItemsHost="True" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.Items>
<TextBlock>Test1</TextBlock>
<TextBlock>Test2</TextBlock>
<TextBlock>Test3</TextBlock>
<TextBlock>Test4</TextBlock>
<TextBlock>Test5</TextBlock>
</ListView.Items>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Grid>
<ContentPresenter/>
</Grid>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True" />
<Condition Property="IsSelected" Value="True"/>
</MultiTrigger.Conditions>
<Setter Property="Visibility" Value="Collapsed"/>
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
</ListView>
According to the MultiTrigger settings, the selected item should reappear when the mouse is no longer over the selected item. This code, however, produces an InvalidOperationException with the message "Must have non-null value for 'Property'." If you remove the Condition that uses the "Binding" attribute the exception is not thrown. In the MSDN documentation it states that you must have either the Property or Binding attribute set. The above code functions like the Binding attribute is not set. In fact, in all my test cases, it doesn't matter what the Binding attribute is set to; the exception is still thrown. Any thoughts?
This is one of those times when you have to suck it up and admit that you've made a bonehead mistake. However, to save some other unlucky soul from the same fate, I'll reveal my epiphany.
First, if I had read all of the documentation I would have read the part that said if you're using the condition's "Binding" attribute, it needs to be included in a MultiDataTrigger element (instead of the MutiTrigger element in my posted example).
Second, upon making those changes, the MultiTrigger element is replace with the following code:
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True" />
<Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsSelected}" Value="True"/>
</MultiDataTrigger.Conditions>
<Setter Property="Visibility" Value="Collapsed"/>
</MultiDataTrigger>
Now the example works but because the selected item is collapsed, the trigger condition switches back and forth causing the selected item to flicker in and out of view. Makes sense but admittedly not what I intended.
At any rate, hope this helps someone from making the same bonehead mistake!
On a very similar note, pulling IsMouseOver from a border as the main data template content, and pulling the IsSelected from the Ancestor. Its interesting that both conditions have to have a relative path, I would assume that the default path would be the local datacontext. Thanks for the above solution.
Broken Code
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Mode=OneWay, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}, Path=IsSelected}"
Value="True" />
<Condition SourceName="Border"
Property="IsMouseOver"
Value="True" />
</MultiDataTrigger.Conditions>
<Setter TargetName="Border"
Property="Background"
Value="{StaticResource OnBrushSelected}" />
</MultiDataTrigger>
Working Code
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding Mode=OneWay, RelativeSource={RelativeSource Self}, Path=IsMouseOver}"
Value="True" />
<Condition Binding="{Binding Mode=OneWay, RelativeSource={RelativeSource AncestorType={x:Type ListBoxItem}}, Path=IsSelected}"
Value="True" />
</MultiDataTrigger.Conditions>
<Setter TargetName="Border"
Property="Background"
Value="{StaticResource OnBrushSelected}" />
</MultiDataTrigger>