树视图内AutoCompleteBox的弹出窗口
https://stackoverflow.com/questions/3043658
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27-09-2019 - |
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灵感 这个职位, 我试图用一个树视图内AutoCompleteBox的弹出窗口，以便显示的层次数据。
这是我做了什么:
我做我自己的树视图，实现ISelectionAdapter(不确定它是完美)
编辑AutoCompleteBox模板和变化的选择对我的树视图
试着绑我的视图模型它
不幸的是这不是工作。我检查了我的新树视图用相同结合以相同的对象和它的工作番享受时，它的外AutoCompleteBox模板。
任何想法?任何特别的方式来实施ISelectionAdapter为树视图?我错过了什么？
找不到任何实例，用于在网上看到的...
谢谢。
解决方案
我设法把它写最终。
做一个自定义的控制。它仍然需要完善，但它的工作的好：
通用的。键
<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);
}
}
使用的控制：
<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>
层次的对象：
public class Node
{
public string Name { get; set; }
public List<Node> MyNodes { get; set; }
public override string ToString()
{
return Name;
}
}
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