I've a ListView bound to an ObservableCollection<Foo>. On selecting a ListViewItem I display the details of the SelectedItem(Foo members) in a container. It works fine.
Now all I want is to display the details just next to the SelectedItem. ie, If I select the fourth ListViewItem then the Container's Top should be the same as the ListViewItem's Top. How would I sync their position provided it should create any problem even while scrolling the List.
P.S: Scrollbars are hidden
This question is not yet resolved. Can anybody help?
Original Answer
Does the detail need to be in a separate container? I may be misunderstanding your example, but I would have thought you could achieve what you wanted by adding the details section to the item template for your list items and then hiding/showing it based on the IsSelected flag:
<ListView ItemsSource="{Binding}">
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel>
<ContentControl DockPanel.Dock="Right" Name="DetailsControl" Content="{Binding}" ContentTemplate="{StaticResource DetailsTemplate}" />
<TextBlock Text="{Binding}" />
</DockPanel>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding (ListViewItem.IsSelected), RelativeSource={RelativeSource FindAncestor, AncestorType=ListViewItem}}" Value="False">
<Setter TargetName="DetailsControl" Property="Visibility" Value="Hidden" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
Even if you aren't after exactly this behaviour, I imagine you could get close to what you want by replacing the ContentControl from the example with something else (e.g. a Popup)
Edit in response to comments
The example below will place a Popup to the right hand side of the ListView that is visible only for the selected item:
<ListView ItemsSource="{Binding}">
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel>
<TextBlock Text="{Binding}" />
<Popup Placement="Right"
PlacementTarget="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=ListViewItem}}"
IsOpen="{Binding (ListViewItem.IsSelected), RelativeSource={RelativeSource FindAncestor, AncestorType=ListViewItem}}">
<Border Background="Black" Padding="3">
<TextBlock Text="{Binding}" />
</Border>
</Popup>
</DockPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
This uses the Placement attribute to specify that the Popup should appear to the right of the target element, and binds the PlacementTarget property to the first ancestor of type ListViewItem (i.e. the parent container).
This causes an appearance like the example below:
Related
I am using Syncfusion visual style. I am trying to bind the ToolTip foreground inside the TextBlock present inside the StackPanel for displaying the ToolTip text.But the binding doesn't work properly in the TextBlock.
MainWindow.xaml
<Grid>
<CheckBox Grid.Row="5" Grid.Column="1" HorizontalAlignment="Center" Margin="0,4,10,0" VerticalAlignment="Center" IsChecked="{Binding AutoAdd, Mode=TwoWay}">
<CheckBox.ToolTip>
<StackPanel>
<TextBlock Foreground="{Binding Path=Foreground, Mode=OneWay, RelativeSource={RelativeSource AncestorType={x:Type ToolTip}}}" FontWeight="Bold" FontSize="14" Margin="0,0,0,5">Automatically Add To Path</TextBlock>
<TextBlock Foreground="{Binding Path=Foreground, Mode=OneWay, RelativeSource={RelativeSource AncestorType={x:Type ToolTip}}}">
If this path is associated with the primary configuration,
<LineBreak />
automatically add newly instantiated optical elements to the end of the path.
</TextBlock>
<Border BorderBrush="Silver" BorderThickness="0,1,0,0" Margin="0,8" />
<WrapPanel>
<Image Margin="0,0,5,0" />
<TextBlock Foreground="{Binding Path=Foreground, Mode=OneWay, RelativeSource={RelativeSource AncestorType={x:Type ToolTip}}}" FontStyle="Italic">Press F1 for more help</TextBlock>
</WrapPanel>
</StackPanel>
</CheckBox.ToolTip>
</CheckBox>
</Grid>
Any other work around regarding this issue.
Regards,
Hari Prasad
A Tooltip is in a different datacontext and not directly in the visual tree to a control which appears to be it's parent. Hence, when you search up the visual tree using relativesouce, it will find nothing.
You may use PlacementTarget to reference the thing which is nominally it's parent - checkbox in your markup
"{Binding Path=PlacementTarget.PropertyName, RelativeSource={RelativeSource Self}}"
Here PropertyName is whichever property you want.
That could be DataContext.ViewModelProperty if you wanted a property in your viewmodel.
In this instance I would try
Foreground="{Binding Path=PlacementTarget.Foreground, RelativeSource={RelativeSource Self}}"
Depending on your usage, maybe using a dynamicresource would be simpler though.
I have a RadGridView with a GridViewToggleRowDetailsColumn, which can expand a selected item and show more Details. I want to use CaliburnMicro to Display the DetailsView, so I add a property of the DetailsViewModel to my "MainViewModel" and add a ContentControl with a Binding to it.
<telerik:RadGridView ItemsSource="{Binding Products.View}"
SelectedItem="{Binding SelectedProduct}" ... >
<telerik:RadGridView.RowDetailsTemplate>
<DataTemplate>
<ContentControl cal:View.Model="{Binding ProductDetailsViewModel}" />
</DataTemplate>
</telerik:RadGridView.RowDetailsTemplate>
<telerik:RadGridView.Columns>
<telerik:GridViewToggleRowDetailsColumn />
...Columndefinitions...
<telerik:RadGridView.Columns>
</telerik:RadGridView>
The problem is, that the Details are not displayed. From here I read that the binding fails because of the ItemsSource. So i tried
<ContentControl cal:View.Model="{Binding ProductDetailsViewModel, RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}}" />
but it still does not work.
If the ProductDetailsViewModel property is the defined in the same class as the Products property that the RadGridView is bound to, try this:
<ContentControl cal:View.Model="{Binding DataContext.ProductDetailsViewModel, RelativeSource={RelativeSource FindAncestor, AncestorType=telerik:RadGridView}}" />
So I have a listbox and I'm trying to use a stackpanel inside as an item with a border. Now I want every item to be the same width as my listbox, which is anchored to the sides of the window. I found how to set the width relative to the parent but for some reason it turns out to be wider. Can't seem to figure out why. Picture below code of how it looks.
<ListBox x:Name="listBoxSecrets" Margin="10,107,10,10" Background="{x:Null}">
<ListBox.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Orange" CornerRadius="2,2,2,2" BorderThickness="2,2,2,2">
<StackPanel Background="White"
Width="{Binding RelativeSource=
{RelativeSource FindAncestor,
AncestorType={x:Type ListBox}},
Path=ActualWidth}"
>
<TextBlock Text="{Binding Path=Name}" />
<TextBlock Text="{Binding Path=Totp}" />
</StackPanel>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
ListBox.ActualWidth is too much for ListBoxItems. But ListBoxItems will use all available width if ListBox has HorizontalContentAlignment set to "Stretch":
<ListBox HorizontalContentAlignment="Stretch"
I've tried several different solutions to this, but can't land on one that meets all of my needs.
We have an observable collection of objects that each have a status and a name. It's a sort of task-list of running items. To display this list in WPF, we have some code that represents each item as an ellipse with some colors and animations.
The problem is that we want to display the name of the item as a 'popup' both on mouseover, or when the task is in a given state.
Attempt #1
My first attempt implemented this as a Datatemplate (to be used as an ItemTemplate) with an actual WPF Popup. I implemented two datatriggers - one for mouseover and one for task state. I positioned the popup based on my ellipse and everything was great. However, moving the window or switching to a different window left the popup on top of everything.
Attempt #2
Instead of using the popup I used a textbox in a canvas. This works great until the Datatemplate is used in the Listbox. The item host (stackpanel) ends up clipping the string.
Here's example code:
<DataTemplate x:Key="EllipseTemplate">
<Grid Height="40" Width="40">
<Canvas Name="PopupCanvas" HorizontalAlignment="Center" Width="500">
<TextBlock Name="PopupName"
Width="{Binding ElementName=PopupCanvas, Path=ActualWidth}"
Text="{Binding}"
Background="Transparent"
FontSize="16" HorizontalAlignment="Center" TextAlignment="Center" FontWeight="Bold"
Canvas.Top="-25"
Visibility="Collapsed"
/>
</Canvas>
<Ellipse x:Name="Ellipse" Height="25" Width="25" Margin="0"
HorizontalAlignment="Center" VerticalAlignment="Center"
Fill="Green"
RenderTransformOrigin="0.5, 0.5" StrokeThickness="0.5" Stroke="Black">
</Ellipse>
</Grid>
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource TemplatedParent}}" Value="True">
<Setter TargetName="PopupName" Property="Visibility" Value="Visible" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
<Grid Name="Test" Background="LightGoldenrodYellow" ClipToBounds="False" Margin="50">
<ListBox Name="OverlayTest"
Background="CornflowerBlue"
BorderThickness="0"
VerticalAlignment="Center"
Margin="10"
ClipToBounds="False"
ItemTemplate="{StaticResource EllipseTemplate}">
<sys:String>Very long string that will get clipped</sys:String>
<sys:String>Two</sys:String>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" IsItemsHost="True" Margin="10,50,10,50" ClipToBounds="False"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</Grid>
Attempt #3
I moved my canvas/textbox outside of the datatemplate and create a grid to put it above the listbox of ellipses. This works from a layout perspective, but creates a big mess in terms of checking for mouseover and centering the textbox on the control that's active/hovered.
So that leaves me without an implementation that works the way I want. Anyone have any suggestions?
Ok here I have another idea. I had problem with the ListBox before. Try replacing the ListBox with an ItemsControl.
Attempt #2 sounds like is working fine. You should be able to solve the issue of the clipping using one of these solutions (or all of them):
Set the ClipToBounds property of the ListBox to false
Set the ClipToBounds property of the Stackpanel to false
I've a main view and many usercontrols.
The main view contains a two column grid, with the first column filled with a listbox whose datatemplate consists of a usercontrol and the second column filled with another usercontrol. These two usercontrols have the same datacontext.
MainView:
<Grid>
//Column defs
...
<ListView Grid.Column="0" ItemSource="{Binding FooList}">
...
<DataTemplate>
<Views: FooView1 />
</DataTemplate>
</ListView>
<TextBlock Text="{Binding FooList.Count}" />
<StackPanel Grid.Column="1">
<Views: FooView2 />
</StackPanel>
<Grid>
FooView1:
<UserControl>
<TextBlock Text="{Binding Foo.Title}">
</UserControl>
FooView2:
<UserControl>
<TextBlock Text="{Binding Foo.Detail1}">
<TextBlock Text="{Binding Foo.Detail2}">
<TextBlock Text="{Binding Foo.Detail3}">
<TextBlock Text="{Binding Foo.Detail4}">
</UserControl>
I've no IDE here. Excuse me if there is any syntax error
When the user clicks on a button. These two usercontrols have to be replaced by another two usercontrols, so the datacontext changes, the main ui remaining the same.
ie, FooView1 by BarView1 and FooView2 by BarView2
In short i want to bind this view changes in mainview to my command (command from Button)
How can i do this?
Also tell me if i could merge the usercontrol pairs, so that only one view exists for each viewmodel
ie, FooView1 and FooView2 into FooView and so on...
Though I am still not sure whether I got you, I suggest the following.
In your example it looks like you want to show the details of the Foo object. The datacontext stays the same. Maybe you can set Visibility-Flags in your viewmodel to decide what you want to display. This can be done using the command that is executed by your button.
FooView:
<UserControl>
<TextBlock Text="{Binding Foo.Title}"
Visibility="{Binding ShowTitle}">
<TextBlock Text="{Binding Foo.Detail1}"
Visibility="{Binding ShowDetails}">
<TextBlock Text="{Binding Foo.Detail2}"
Visibility="{Binding ShowDetails}">
<TextBlock Text="{Binding Foo.Detail3}"
Visibility="{Binding ShowDetails}">
<TextBlock Text="{Binding Foo.Detail4}"
Visibility="{Binding ShowDetails}">
</UserControl>
Is this a possible solution?
If you want to change the datatemplate you might do something like this:
FooView (2nd version)
<UserControl>
<UserControl.Resources>
<DataTemplate x:Key="dataTemplate1">
<TextBlock Text="{Binding Foo.Title}">
</DataTemplate>
<DataTemplate x:Key="dataTemplate2">
<TextBlock Text="{Binding Foo.Detail1}">
<TextBlock Text="{Binding Foo.Detail2}">
<TextBlock Text="{Binding Foo.Detail3}">
<TextBlock Text="{Binding Foo.Detail4}">
</DataTemplate>
</UserControl.Resources>
<Style x:Key="Default">
<Style.Triggers>
<DataTrigger Binding="{Binding Foo.ShowFooView}" Value="1" >
<Setter Property="Template" Value="{StaticResource dataTemplate1}" />
<DataTrigger>
<DataTrigger Binding="{Binding Data.ShowFooView}" Value="2" >
<Setter Property="Template" Foo="{StaticResource dataTemplate2}" />
</DataTrigger>
</Style.Triggers>
</Style>
</UserControl>
The idea is, that depending on the property Foo.ShowFooView you decide which data template should be used. Of course the type Foo should implement INotifyPropertyChanged to notify the UI.
Sorry, but I don't get the point. To answer your question you need to provide more information.
Do you want to change your datacontext by replacing a usercontrol?
Why don't you use different datatemplates for different target types?
Maybe you can provide some code snippets.