The WPF version of this question is here: But it hasn't been answered and I don't know if the UWP TreeView will have the same answer.
I'm trying to add a DataTemplateSelector to the new UWP TreeViews that were just added to windows 10 version 1803 but it isn't working. It is documented here how to use the XAML TreeView Control and even shows how to modify the template to change the Item Datatemplate which works fine. I need to use a datatemplate selector since each of my nodes is using different objects and I need them displayed differently. The TreeView.Node.Content is being set just fine and everything works except it is passing null over to the datatemplateselector in the Object parameter.
Here is my code: (same as the example from Microsoft just with using ItemTemplateSelector)
<Style TargetType="TreeView">
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeView">
<TreeViewList x:Name="ListControl"
ItemTemplateSelector="{StaticResource CardSelector}"
ItemContainerStyle="{StaticResource TreeViewItemStyle}"
CanDragItems="True"
AllowDrop="True"
CanReorderItems="True">
<TreeViewList.ItemContainerTransitions>
<TransitionCollection>
<ContentThemeTransition />
<ReorderThemeTransition />
<EntranceThemeTransition IsStaggeringEnabled="False" />
</TransitionCollection>
</TreeViewList.ItemContainerTransitions>
</TreeViewList>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Does anyone have any insight or experience on this? My datatemplateselector "CardSelector" works fine and I have been using it in several places without any trouble.
So the point of my question isn't to get anything that I have working but to see if the TreeViewControl works with a DataTemplateSelector. I only have "CardTemplateSelector" in there because I use it in several other places of my app and I know it works. My question is really a "yes, treeview works with a selector" or "no it doesn't" I'm really looking for someone else to try it with their own test template selector and to let me know if they can get it working. Any specific code from me is not relevant to the question. Just see if you can get it to work with whatever selector you want
Yes. The TreeView work well with ItemTemplateSelector.
I used the all code in the document and create a custom class like the following:
public class Test
{
public string Name { get; set; }
}
I made another DataTemplate like this:
<DataTemplate x:Key="TreeViewObjDataTemplate">
<Grid Height="44">
<TextBlock
Text="{Binding Content.Name}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Style="{ThemeResource BodyTextBlockStyle}"/>
</Grid>
</DataTemplate>
My CardTemplateSelector class is the following:
public class CardTemplateSelector: DataTemplateSelector
{
public DataTemplate TreeViewItemDataTemplate { get; set; }
public DataTemplate TreeViewObjDataTemplate { get; set; }
protected override DataTemplate SelectTemplateCore(object item)
{
TreeViewNode treeViewNode = item as TreeViewNode;
if (treeViewNode.Content is StorageFolder|| treeViewNode.Content is StorageFile)
{
return TreeViewItemDataTemplate;
}
if (treeViewNode.Content is Test)
{
return TreeViewObjDataTemplate;
}
return base.SelectTemplateCore(item);
}
protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
{
return SelectTemplateCore(item);
}
}
I just add the new lines code in MainPage.xaml.cs:
TreeViewNode objnode = new TreeViewNode();
Test test = new Test() {Name="Parent"};
objnode.Content = test;
objnode.IsExpanded = true;
objnode.HasUnrealizedChildren = true;
sampleTreeView.RootNodes.Add(objnode);
The following is the whole xaml page resource code:
<Page.Resources>
<DataTemplate x:Key="TreeViewItemDataTemplate">
<Grid Height="44">
<TextBlock
Text="{Binding Content.DisplayName}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Style="{ThemeResource BodyTextBlockStyle}"/>
</Grid>
</DataTemplate>
<DataTemplate x:Key="TreeViewObjDataTemplate">
<Grid Height="44">
<TextBlock
Text="{Binding Content.Name}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Style="{ThemeResource BodyTextBlockStyle}"/>
</Grid>
</DataTemplate>
<local:CardTemplateSelector x:Name="CardTemplateSelector" TreeViewItemDataTemplate="{StaticResource TreeViewItemDataTemplate}" TreeViewObjDataTemplate="{StaticResource TreeViewObjDataTemplate}"></local:CardTemplateSelector>
<Style TargetType="TreeView">
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TreeView">
<TreeViewList x:Name="ListControl"
ItemTemplateSelector="{StaticResource CardTemplateSelector}"
ItemContainerStyle="{StaticResource TreeViewItemStyle}"
CanDragItems="True"
AllowDrop="True"
CanReorderItems="True">
<TreeViewList.ItemContainerTransitions>
<TransitionCollection>
<ContentThemeTransition />
<ReorderThemeTransition />
<EntranceThemeTransition IsStaggeringEnabled="False" />
</TransitionCollection>
</TreeViewList.ItemContainerTransitions>
</TreeViewList>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
So far I have answered your question. But I still want to let you know How to ask a good question. In my above comments, I asked you to provide the relevant code, then I could quickly reproduce your question and help you diagnose it. But you said I'm really looking for someone else to try it with their own test template selector and to let me know if they can get it working.. It's Ok. You could see that only I replied. You asked this question for many days. No other community members helped you on this question. That's why I ask you to post some code here. If you provide the relevant code here, I believe many community members will be glad to help you on this question. I really hope you could understand it.
There seems to be confusion about where to apply the DataTemplate. And the all important TargetType is ignored.
If you want a handle on the data item in your custom DataTemplateSelector, you need to:
OPTION 1
Apply the DataTemplateSelector on TreeView.ItemTemplateSelector
Make sure that the DataTemplates have TreeViewNode as the target type.
Only then the data item of the TreeViewNode is supplied to the SetTemplateCore(object item) and SetTemplateCore(object item, DependencyObject container) overrides of your custom DataTemplateSelector.
A working example is found here: Pictures and Music library tree view
OPTION 2
Apply the DataTemplateSelector on TreeViewItem.ContentTemplateSelector
Make sure that the DataTemplates have [YOUR-DATA-TYPE] as the target type
In the TreeView.ItemTemplate bind the DataContext AND Content property to [YOUR-DATA-TYPE], i.e.
<TreeView.ItemTemplate>
<DataTemplate x:DataType="[YOUR-DATA-TYPE]">
<TreeViewItem DataContext="{Binding}" ... Content="{Binding}">
<TreeViewItem.ContentTemplateSelector>
<YourDataTemplateSelector.TemplateA>
<DataTemplate x:DataType="[YOUR-DATA-TYPE]">
...
// YourDataTemplateSelector
protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
{
if (item == null) return null;
return (([YOUR-DATA-TYPE])item).IsSomething ? TemplateA : TemplateB;
}
Related
I'm having an issue to style my custom control derived from button.
I inherited the Button class to add a DependencyProperty to it:
public class IconButton : Button, IStyleable
{
Type IStyleable.StyleKey => typeof(Button);
public static readonly StyledProperty<string> IconProperty =
AvaloniaProperty.Register<IconButton, string>(nameof(Icon));
public string Icon
{
get { return GetValue(IconProperty); }
set { SetValue(IconProperty, value); }
}
}
Now I want to create a style targetting only this derived class:
<Styles xmlns="https://github.com/avaloniaui"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="clr-namespace:Projektanker.Icons.Avalonia;assembly=Projektanker.Icons.Avalonia"
xmlns:cc="*****.*****.CustomControls">
<Design.PreviewWith>
<Border Padding="20">
<StackPanel Orientation="Vertical">
<cc:IconButton Content="hello custom" Icon="fab fa-github"/>
<Button Content="hello"/>
</StackPanel>
</Border>
</Design.PreviewWith>
<Style Selector=":is(cc|IconButton)">
<Setter Property="Background" Value="Red"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<StackPanel Orientation="Horizontal">
<i:Icon Value="{TemplateBinding Icon}" />
<TextBlock Text="{TemplateBinding Content}" />
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Styles>
AS you can see, the content is not my control template as the icon is not visible and the background is not red. Therefore I can't use my dependencyproperty.
Any suggestions or is it not supported by the language?
I read on the documentation that is(****) for selector is intended to support derived type so I would expect my code to be working :(
Thx for help.
Try to remove IStyleable and your overriden StyleKey. You are telling the selector that it should look for a Button style and not your style.
Happy coding
Tim
PS I cannot test it on my own right now, so if it doesn't work please tell me here.
Update: I just made a blank new project and tested your code. Once I remove the StyleKey, it works:
This is the modified IconButton:
public class IconButton : Button
{
public static readonly StyledProperty<string> IconProperty =
AvaloniaProperty.Register<IconButton, string>(nameof(Icon));
public string Icon
{
get { return GetValue(IconProperty); }
set { SetValue(IconProperty, value); }
}
}
If you are able to upload a minimal sample on Github, I can have a look what may be wrong.
Update 2: Looking into your demo App I see that you use a third party icon lib. The lib requires you to configure a special service at start up, see: https://github.com/Projektanker/Icons.Avalonia#1-register-icon-providers-on-app-start-up
I send you a PR which fixes your issue.
Happy coding
Tim
I have a problem that is not addressed by the numerous articles on MVVM grouping that I have read.
I am writing a WPF application. Here are some excepts from classes that are relevant to my question - first the MainViewModel:
public class MainViewModel
{
public ObservableCollection<Recipe_OverViewModel> RecipeOverViews {get ; set;}
....[omitted extraneous lines]....
The class that is used as the observable collection of Recipes in the MainViewModel:
public class Recipe_OverViewModel
{
public Recipe TargetRecipe { get; set; }
public override string ToString()
{
return TargetRecipe.Parent_Name;
}
....[omitted extraneous lines]....
and The Class that is taken from the database, that is the actual Recipe
public partial class Recipe
{
[Required]
[StringLength(1000)]
public string Parent_Name { get; set; }
[Required]
[StringLength(60)]
public string Recipe_Name { get; set; }
public override string ToString()
{
return Parent_Name;
}
public int CompareTo(object obj)
{
return Parent_Name.CompareTo(((Recipe)obj).Parent_Name);
}
....[omitted extraneous lines]....
Each class has more properties and methods and so on, but these are enough to explain what I am asking.
The Recipe_OverViewModel is the view model for a control (Recipe_OverView) that displays the properties of the recipe. In the MainViewModel, I have the following xaml (extracted from the larger file):
<Window x:Class="RecipeApp.UI.MainWindow"
....[omitted extraneous lines]....
xmlns:vm="clr-namespace:RecipeApp.UI.ViewModel"
>
<Window.Resources>
<DataTemplate DataType="{x:Type vm:Recipe_OverViewModel}" x:Key="Recipe_DT" x:Name="Recipe_DT">
<control:Recipe_OverView Width="{Binding ActualWidth,ElementName=ListWidth}"/>
</DataTemplate>
<CollectionViewSource x:Key="SortedRecipeOverViews" Source="{Binding RecipeOverViews}">
<CollectionViewSource.SortDescriptions>
<scm:SortDescription PropertyName="TargetRecipe"/>
</CollectionViewSource.SortDescriptions>
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="TargetRecipe"/>
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
</Window.Resources>
....[omitted extraneous lines]....
<ListView ItemsSource="{Binding Source={StaticResource SortedRecipeOverViews}}"
ItemTemplate="{StaticResource Recipe_DT}">
</ListView>
This list view correctly displays the list of recipes in the listview, with each row containing the Recipe_OverView control. However, I cannot get the grouping to work correctly. I would like to group the listview by the Parent_Name property of the Recipe associated with each Recipe_OverViewModel. My attempt looked like this, following the Microsoft HowTo:
<ListView Grid.Row="1" Grid.Column="1"
ItemsSource="{Binding Source={StaticResource SortedRecipeOverViews}}"
ItemTemplate="{StaticResource Recipe_DT}"
>
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander IsExpanded="true">
<Expander.Header>
<TextBlock Text="{Binding Path=ParentName}" />
</Expander.Header>
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</ListView.GroupStyle>
</ListView>
However, all I get from that is as many empty (no ParentName populated) headers as there are recipes in the collection and a Binding Failure that tells me the "ParentName property not found on object of type CollectionViewGroupInternal." I get the expander buttons, but there is nothing within the expanded groups:
I thought I understand that that means that the binding is looking in the Recipe_OverViewModel for the ParentName property, but even when I added this as a property in the Recipe_OverViewModel and populated it, I still got this error, so now I am confused and have the following questions:
Where is the binding on the ListView actually looking?
How should I direct it to look at the Recipe_OverViewModel.TargetRecipe.ParentName (or is it impossible)?
I would really appreciate help on this matter, so many articles take so much simpler examples, and I cannot work out how to extend it to my case!
Where is the binding on the ListView actually looking?
It looks for a property of the CollectionViewGroupInternal class.
This class has a Name property that returns the value of the property that you group by, i.e. TargetRecipe, and an Items property that returns the collection of objects that belongs to the current group.
So, if I understand your setup correctly, you could try to bind to the Parent_Name property of the first item in the group:
<Expander.Header>
<TextBlock Text="{Binding Items[0].Parent_Name}" />
</Expander.Header>
The ItemsSource is bound to the SortedRecipeOverViews, which in turn is bound to the RecipeOverViews collection.
The item type of this collection is Recipe_OverViewModel.
And this type doesn't have a ParentName property.
There is a Parent_Name property, BUT not in the Recipe_OverViewModel type, but in the Recipe type.
And the Recipe_OverViewModel type has a property of this type.
In general, you have some kind of mess of types, their names and their properties, binding paths.
Perhaps you copied something wrong into the topic?
Based on my own guess, try applying a binding like this:
<Expander.Header>
<TextBlock Text="{Binding Path=TargetRecipe.Parent_Name}" />
</Expander.Header>
I'm currently working on a WPF .NET 4.7 application and I use Infragistics WPF controls version 18.
I need to create a custom XamComboEditor which has a XamDataTree inside. Thus a ComboBox with a Tree selection inside.
The Tree selection works fine without the XamComboEditor and looks like this:
<iWPF:XamDataTree ItemsSource="{Binding Locations}">
<iWPF:XamDataTree.GlobalNodeLayouts>
<iWPF:NodeLayout Key="Locations" TargetTypeName="LocationViewModel" DisplayMemberPath="Name"/>
<iWPF:NodeLayout Key="ChildLocations" TargetTypeName="string"/>
</iWPF:XamDataTree.GlobalNodeLayouts>
</iWPF:XamDataTree>
My XamDataTree is bound to an observable collection Locations:
public ObservableCollection<LocationViewModel> Locations { get; set; } = new ObservableCollection<LocationViewModel>();
public class LocationViewModel
{
public int Id { get; set; }
public string Name { get; set; }
public List<LocationViewModel> ChildLocations { get; set; } = new List<LocationViewModel>();
}
I need to use the style setter on my XamComboEditor to put the XamDataTree inside the combobox.
My problem is now, I don't know how to achieve this, or how to pass the context from the XamComboEditor further to the XamDataTree.
I tried the following, in vain:
<iWPF:XamComboEditor ItemsSource="{Binding Locations}">
<iWPF:XamComboEditor.ComboBoxStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<iXaml:XamDataTree ItemsSource="{Binding .}">
<iXaml:XamDataTree.GlobalNodeLayouts>
<iXaml:NodeLayout Key="Locations" TargetTypeName="LocationViewModel" DisplayMemberPath="{Binding Name}"/>
<iXaml:NodeLayout Key="ChildLocations" TargetTypeName="string"/>
</iXaml:XamDataTree.GlobalNodeLayouts>
</iXaml:XamDataTree>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</iWPF:XamComboEditor.ComboBoxStyle>
</iWPF:XamComboEditor>
Do you know how to solve this issue? Do you know how to pass the data context from the parent control to, let's say, the child control? Or rather, how to put the XamDataTree inside the XamComboEditor?
If I understood this correctly, the DataContext of your XamlDataTree is no what you expect it to be (the Locations bound in you XamComboEditor).
One way to solve this problem is to specify the source of the path in your Binding markup extension.
You can use the {x:Reference ...} markup extension to reference a named controled in your control tree.
<iWPF:XamComboEditor x:Name="comboEditor" ItemsSource="{Binding Locations}">
<iWPF:XamComboEditor.ComboBoxStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<iXaml:XamDataTree ItemsSource="{Binding Source={x:Reference Name=comboEditor}, Path=DataContext.Locations}">
<iXaml:XamDataTree.GlobalNodeLayouts>
<iXaml:NodeLayout Key="Locations" TargetTypeName="LocationViewModel" DisplayMemberPath="{Binding Name}"/>
<iXaml:NodeLayout Key="ChildLocations" TargetTypeName="string"/>
</iXaml:XamDataTree.GlobalNodeLayouts>
</iXaml:XamDataTree>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</iWPF:XamComboEditor.ComboBoxStyle>
</iWPF:XamComboEditor>
You can also achieve this without naming your controls with the RelativeSource property in the Binding (something like RelativeSource={RelativeSource AncestorType=iWPF:XamComboEditor}).
I've recently started development on a Windows 10 app which requires the display of events and extra information on a CalendarView. With the release of the new API, a new CalendarView component was also introduced, so I decided to give it a try. It's a nice widget, but customization has been a hell.
I've gotten to the point where I can display custom information using a ControlTemplate, but binding events and styling with VisualState has been quite a struggle.
This is the ControlTemplate I'm using wrapped in a Style.
<Style x:Key="dayItemStyle" TargetType="CalendarViewDayItem">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="CalendarViewDayItem">
<Grid x:Name="DayItemEventListRoot">
<ListView ItemsSource="{TemplateBinding DataContext}" Padding="20,0,0,0" x:Name="EventInfoList"
IsItemClickEnabled="True" cm:Message.Attach="[Event ItemClick] = [ListTapped]">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel x:Name="EventInfoPanel" Orientation="Horizontal">
<TextBlock x:Name="EventTime" Text="{Binding Date, Converter={StaticResource StringFormatter}, ConverterParameter=\{0:HH:mm\} }"
Foreground="{Binding Foreground, RelativeSource={RelativeSource Self}}" >
</TextBlock>
<TextBlock x:Name="EventDesc" Text="{Binding Name}" Padding="5,0,0,0" Foreground="Black" >
</TextBlock>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup>
<VisualState x:Name="Normal" />
<VisualState x:Name="Today" >
<VisualState.Setters>
<Setter Target="EventTime.Foreground" Value="White" />
<Setter Target="EventDesc.Foreground" Value="White" />
<Setter Target="EventTime.Text" Value="DASFASDDF" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
The style is then directly set on the CalenderView component.
<CalendarView Name="FlowCalendar" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" VerticalDayItemAlignment="Top" HorizontalDayItemAlignment="Left"
Grid.Column="0" Grid.Row="0" Grid.ColumnSpan="5" Grid.RowSpan="4" CalendarViewDayItemChanging="FlowCalendar_CalendarViewDayItemChanging"
CalendarViewDayItemStyle="{StaticResource dayItemStyle}">
</CalendarView>
Extra information and states are controlled by the CalenderViewDayItemChanging event in the code-behind.
private void FlowCalendar_CalendarViewDayItemChanging(CalendarView sender, CalendarViewDayItemChangingEventArgs args)
{
if(args.Item.Date.Date.Equals(DateTime.Now.Date))
{
VisualStateManager.GoToState(args.Item, "Today", false);
// Testing, gives NullPointerException
//TextBlock bla = (TextBlock) args.Item.FindName("EventTime");
//bla.Text = "SDADASFASDF";
}
if (args.Phase == 0)
{
var eventsByDate = ViewModel.Upcoming.FirstOrDefault(eg => eg.Key.Date == args.Item.Date.Date);
if (eventsByDate != null)
{
args.Item.DataContext = eventsByDate.ToList();
}
}
}
Setting the visual state does nothing (I've checked if it's being called), moving the VisualState(Group) outside of the ControlTemplate just gives me an error that the targets could not be found.
I'm looking to control the event listview style through visual states, which for now are custom since I'm not sure what built-in states CalendarViewDayItem has. I'm quite new to visual states, so any pointers are much appreciated.
Thanks.
Your code will not work because VisualStateManager.GoToState takes a Control as the first parameter; however, your VisualStateManager is defined inside a StackPanel of which type is Panel.
You will need to implement your own VSM which takes a Panel instead. Have a look at the answer to this post on how to do this.
However, this still won't fix your problem. As you need to somehow locate the StackPanels (note 'cause it's within a ListView, there could be multiple) and then call the ExtendedVisualStateManager.GoToState.
I would suggest you to wrap this template within a UserControl (by doing this you might do not even need to extend the VSM as you can use GoToStateAction instead) and have a dependency property (IsToday) to control the states. Then you can use ElementName binding to pass a property at the CalendarViewDayItem level down to IsToday in order to make a state change.
Update
I was actually wrong about the need of using the ExtendedVisualManager to change the visual states. Since it's already inside a UserControl, you can actually call VisualStateManager.GoToState(this, "statename", flag); directly.
However, the way you define the dependency property is wrong.
Replace the code behind with the following and it should work.
public bool IsToday
{
get { return (bool)GetValue(IsTodayProperty); }
set { SetValue(IsTodayProperty, value); }
}
public static readonly DependencyProperty IsTodayProperty =
DependencyProperty.Register("IsToday", typeof(bool), typeof(EventListTemplate), new PropertyMetadata(false, OnIsTodayChanged));
static void OnIsTodayChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var template = (EventListTemplate)d;
if ((bool)e.NewValue)
{
var stateset = VisualStateManager.GoToState(template, "DayItemToday", false);
Debug.WriteLine("did it:", stateset);
}
}
I have a ListBox that its ItemsSource is given from a class based on the data binded items template. I want to find ListBox.SelectedItem position relative to the ListBox. Since I've used a class to feed ItemsSource, I'm not be able to cast ListBox.SelectedItem (which has a type of object) to the ListBoxItem. (Instead I should cast it to the source class type.)
What's the way? -Thanks
Details: (Arbitrary)
There is a ListBox which implements a Style like so:
<Style x:Key="MyListBoxStyle" TargetType="{x:Type ListBox}">
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<Border ...>
<StackPanel ...>
<Image Source="{Binding Path=ItemImageSource}" .../>
<TextBlock Text="{Binding Path=ItemTitle}" .../>
</StackPanel>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
The ListBox has been used as follows:
<ListBox x:Name="MyListBox"
ItemsSource="{Binding}"
Style="{StaticResource ResourceKey=MyListBoxStyle}"/>
Also there is a class that supports MyListBox data-binding info:
internal class MyListBoxItemBinding
{
public string ItemTitle { get; set; }
public ImageSource ItemImageSource { get; set; }
}
And to feed the MyListBox:
MyListBox.ItemsSource = new List<MyListBoxItemBinding> { /* some items */ };
Now, how can I find MyListBox.SelectedItem location relative to the MyListBox?
Use ItemsControl.ItemContainerGenerator to get a reference to the item container generator for your ListBox (this is the object that creates wrappers for all your databound objects).
Then, use the ItemContainerGenerator.ContainerFromItem method to get a reference to the UIElement that represents the selected ListBoxItem.
Finally, see the answer to this question to for a way of getting the coordinates of the selected item relative to the ListBox.