TreeView innerhalb AutoCompleteBox des Popup
https://stackoverflow.com/questions/3043658
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27-09-2019 - |
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Inspiriert von diesem Beitrag , ich bin versuchen, ein TreeView zu verwenden innerhalb des Popup des AutoCompleteBox, um hierarchische Daten zu zeigen.
Hier ist, was ich getan habe:
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Ich habe meine eigene TreeView dass Geräte ISelectionAdapter (nicht sicher, dass es perfekt)
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Bearbeiten AutoCompleteBox Vorlage und den Wähler ändern, um meine treeview
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Versuchen Sie Bind meines Ansichtsmodell, um es
Leider ist dies nicht funktioniert. Ich überprüfte mein neues TreeView mit dem gleichen auf das gleiche Objekt verbindlich und es funktioniert prefectly, wenn es außerhalb einer AutoCompleteBox Vorlage.
Jede Idee? jede besondere Art und Weise ISelectionAdapter für treeview zu implementieren? Habe ich etwas verpasst?
konnte kein Beispiel dafür, die im Internet finden ...
Danke.
Lösung
schaffte ich es schließlich zu schreiben.
Wir machten eine individuelle Steuerung für sie. es müssen noch verfeinert werden, aber es funktioniert gut:
generic.xaml:
<ControlTemplate x:Key="CommonValidationToolTipTemplate" TargetType="ToolTip">
<Grid x:Name="Root" Margin="5,0" Opacity="0" RenderTransformOrigin="0,0">
<Grid.RenderTransform>
<TranslateTransform x:Name="Translation" X="-25"/>
</Grid.RenderTransform>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="OpenStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0"/>
<VisualTransition GeneratedDuration="0:0:0.2" To="Open">
<Storyboard>
<DoubleAnimation Duration="0:0:0.2" To="0" Storyboard.TargetProperty="X" Storyboard.TargetName="Translation">
<DoubleAnimation.EasingFunction>
<BackEase Amplitude=".3" EasingMode="EaseOut"/>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
<DoubleAnimation Duration="0:0:0.2" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="Root"/>
</Storyboard>
</VisualTransition>
</VisualStateGroup.Transitions>
<VisualState x:Name="Closed">
<Storyboard>
<DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="Root"/>
</Storyboard>
</VisualState>
<VisualState x:Name="Open">
<Storyboard>
<DoubleAnimation Duration="0" To="0" Storyboard.TargetProperty="X" Storyboard.TargetName="Translation"/>
<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="Root"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Border Background="#052A2E31" CornerRadius="5" Margin="4,4,-4,-4"/>
<Border Background="#152A2E31" CornerRadius="4" Margin="3,3,-3,-3"/>
<Border Background="#252A2E31" CornerRadius="3" Margin="2,2,-2,-2"/>
<Border Background="#352A2E31" CornerRadius="2" Margin="1,1,-1,-1"/>
<Border Background="#FFDC000C" CornerRadius="2">
<TextBlock Foreground="White" MaxWidth="250" Margin="8,4,8,4" TextWrapping="Wrap" Text="{Binding (Validation.Errors)[0].ErrorContent}" UseLayoutRounding="false"/>
</Border>
</Grid>
</ControlTemplate>
<Style TargetType="local:AutoCompleteTreeView"
xmlns:System="clr-namespace:System;assembly=mscorlib">
<Setter Property="IsTabStop" Value="False"/>
<Setter Property="Padding" Value="2"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="BorderBrush">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFA3AEB9" Offset="0"/>
<GradientStop Color="#FF8399A9" Offset="0.375"/>
<GradientStop Color="#FF718597" Offset="0.375"/>
<GradientStop Color="#FF617584" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Background" Value="#FFFFFFFF"/>
<Setter Property="Foreground" Value="#FF000000"/>
<Setter Property="MinWidth" Value="45"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:AutoCompleteTreeView">
<Grid Opacity="{TemplateBinding Opacity}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="PopupStates">
<VisualStateGroup.Transitions>
<VisualTransition GeneratedDuration="0:0:0.1" To="PopupOpened"/>
<VisualTransition GeneratedDuration="0:0:0.2" To="PopupClosed"/>
</VisualStateGroup.Transitions>
<VisualState x:Name="PopupOpened">
<Storyboard>
<DoubleAnimation To="1.0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PopupBorder"/>
</Storyboard>
</VisualState>
<VisualState x:Name="PopupClosed">
<Storyboard>
<DoubleAnimation To="0.0" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="PopupBorder"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
<VisualStateGroup x:Name="ValidationStates">
<VisualState x:Name="Valid"/>
<VisualState x:Name="InvalidUnfocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="InvalidFocused">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility" Storyboard.TargetName="ValidationErrorElement">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsOpen" Storyboard.TargetName="validationTooltip">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<System:Boolean>True</System:Boolean>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<TextBox x:Name="Text" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" IsTabStop="True" Margin="0" Padding="{TemplateBinding Padding}" Style="{TemplateBinding TextBoxStyle}"/>
<Border x:Name="ValidationErrorElement" BorderBrush="#FFDB000C" BorderThickness="1" CornerRadius="1" Visibility="Collapsed">
<ToolTipService.ToolTip>
<ToolTip x:Name="validationTooltip" DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PlacementTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}" Template="{StaticResource CommonValidationToolTipTemplate}">
<ToolTip.Triggers>
<EventTrigger RoutedEvent="Canvas.Loaded">
<BeginStoryboard>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="IsHitTestVisible" Storyboard.TargetName="validationTooltip">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<System:Boolean>true</System:Boolean>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</ToolTip.Triggers>
</ToolTip>
</ToolTipService.ToolTip>
<Grid Background="Transparent" HorizontalAlignment="Right" Height="12" Margin="1,-4,-4,0" VerticalAlignment="Top" Width="12">
<Path Data="M 1,0 L6,0 A 2,2 90 0 1 8,2 L8,7 z" Fill="#FFDC000C" Margin="1,3,0,0"/>
<Path Data="M 0,0 L2,0 L 8,6 L8,8" Fill="#ffffff" Margin="1,3,0,0"/>
</Grid>
</Border>
<Popup x:Name="Popup">
<Grid Opacity="{TemplateBinding Opacity}">
<Border x:Name="PopupBorder" BorderThickness="0" Background="#11000000" HorizontalAlignment="Stretch" Opacity="0">
<Border.RenderTransform>
<TranslateTransform X="1" Y="1"/>
</Border.RenderTransform>
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="0" HorizontalAlignment="Stretch" Opacity="1.0" Padding="0">
<Border.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFDDDDDD" Offset="0"/>
<GradientStop Color="#AADDDDDD" Offset="1"/>
</LinearGradientBrush>
</Border.Background>
<Border.RenderTransform>
<TransformGroup>
<TranslateTransform X="-1" Y="-1"/>
</TransformGroup>
</Border.RenderTransform>
<local:TreeViewSelectionAdapter x:Name="SelectionAdapter" BorderThickness="0" Background="{TemplateBinding Background}" Foreground="{TemplateBinding Foreground}" ScrollViewer.HorizontalScrollBarVisibility="Auto" ItemTemplate="{TemplateBinding ItemTemplate}" ItemContainerStyle="{TemplateBinding ItemContainerStyle}" ScrollViewer.VerticalScrollBarVisibility="Auto"/>
</Border>
</Border>
</Grid>
</Popup>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
AutoCompleteTreeView.cs:
public class AutoCompleteTreeView : AutoCompleteBox
{
public AutoCompleteTreeView()
{
DefaultStyleKey = typeof(AutoCompleteTreeView);
}
}
TreeViewSelectionAdapter.cs:
public class TreeViewSelectionAdapter : TreeView, ISelectionAdapter
{
private object lastSelectedItem = null;
/// <summary>
///This prevents the text box of the AutoCompleteBox control from being updated continuously.
/// </summary>
private bool IgnoreAnySelection { get; set; }
/// <summary>
/// An event that indicates that a selection is complete and has been
/// made, effectively a commit action.
/// </summary>
public event RoutedEventHandler Commit;
/// <summary>
/// An event that indicates that the selection operation has been
/// canceled.
/// </summary>
public event RoutedEventHandler Cancel;
/// <summary>
/// Initializes a new instance of the SelectorSelectionAdapter class.
/// </summary>
public TreeViewSelectionAdapter()
{
base.SelectedItemChanged += new RoutedPropertyChangedEventHandler<object>(OnSelectionChanged);
MouseLeftButtonUp += OnSelectorMouseLeftButtonUp;
}
void OnSelectionChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
if (IgnoreAnySelection)
{
return;
}
SelectionChangedEventHandler handler = this.SelectionChanged;
if (handler != null)
{
IList oldSelectedItem = new List<object>();
if (lastSelectedItem != null)
oldSelectedItem.Add(lastSelectedItem);
if (SelectionChanged != null)
handler(this, new SelectionChangedEventArgs(oldSelectedItem, new List<object> { this.SelectedItem }));
lastSelectedItem = this.SelectedItem;
}
}
public new object SelectedItem
{
get
{
return base.SelectedItem;
}
set
{
this.SelectItem(value);
}
}
/// <summary>
/// Handles the mouse left button up event on the selector control.
/// </summary>
private void OnSelectorMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
IgnoreAnySelection = false;
OnSelectionChanged(this, null);
OnCommit(this, new RoutedEventArgs());
}
public event SelectionChangedEventHandler SelectionChanged;
/// <summary>
/// Gets or sets the items source.
/// </summary>
public new IEnumerable ItemsSource
{
get { return base.ItemsSource; }
set
{
if (base.ItemsSource != null)
{
INotifyCollectionChanged notify = base.ItemsSource as INotifyCollectionChanged;
if (notify != null)
{
notify.CollectionChanged -= OnCollectionChanged;
}
}
base.ItemsSource = value;
if (base.ItemsSource != null)
{
INotifyCollectionChanged notify = base.ItemsSource as INotifyCollectionChanged;
if (notify != null)
{
notify.CollectionChanged += OnCollectionChanged;
}
}
}
}
/// <summary>
/// Handles the CollectionChanged event, resetting the selection
/// ignore flag.
/// </summary>
private void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
IgnoreAnySelection = true;
}
/// <summary>
/// Process a key down event.
/// </summary>
public void HandleKeyDown(KeyEventArgs e)
{
switch (e.Key)
{
case Key.Enter:
IgnoreAnySelection = false;
OnCommit(this, e);
e.Handled = true;
break;
case Key.Down:
if ((ModifierKeys.Alt & Keyboard.Modifiers) == ModifierKeys.None)
{
IgnoreAnySelection = true;
//SelectedIndexIncrement();
TreeView tv = this.FindName("SelectionAdapter") as TreeView;
tv.KeyDown += new KeyEventHandler(tv_KeyDown);
tv.Focus();
List<TreeViewItem> ls = new List<TreeViewItem>(tv.GetContainers());
ls[0].Focus();
e.Handled = true;
}
break;
case Key.Escape:
OnCancel(this, e);
e.Handled = true;
break;
default:
break;
}
}
void tv_KeyDown(object sender, KeyEventArgs e)
{
switch (e.Key)
{
case Key.Enter:
IgnoreAnySelection = false;
OnSelectionChanged(this, null);
OnCommit(this, new RoutedEventArgs());
break;
}
}
/// <summary>
/// Fires the Commit event.
/// </summary>
private void OnCommit(object sender, RoutedEventArgs e)
{
RoutedEventHandler handler = Commit;
if (handler != null)
{
handler(sender, e);
}
AfterAdapterAction();
}
/// <summary>
/// Fires the Cancel event.
/// </summary>
private void OnCancel(object sender, RoutedEventArgs e)
{
RoutedEventHandler handler = Cancel;
if (handler != null)
{
handler(sender, e);
}
AfterAdapterAction();
}
/// <summary>
/// Change the selection after the actions are complete.
/// </summary>
private void AfterAdapterAction()
{
this.SetSelectedContainer(null);
}
/// <summary>
/// Initializes a new instance of a DataGridAutomationPeer.
/// </summary>
public AutomationPeer CreateAutomationPeer()
{
return new TreeViewAutomationPeer(this);
}
}
Mit der Steuerung:
<ccontrols:AutoCompleteTreeView x:Name="textbox" MinimumPrefixLength="1" IsEnabled="True" ItemsSource="{Binding MyNodes}" >
<ccontrols:AutoCompleteTreeView.ItemTemplate>
<hirarch:HierarchicalDataTemplate ItemsSource="{Binding MyNodes}" >
<TextBlock Text="{Binding Name}" />
</hirarch:HierarchicalDataTemplate>
</ccontrols:AutoCompleteTreeView.ItemTemplate>
</ccontrols:AutoCompleteTreeView>
Die Hierarchieobjekte:
public class Node
{
public string Name { get; set; }
public List<Node> MyNodes { get; set; }
public override string ToString()
{
return Name;
}
}
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