Hi I need to solve a problem between the TextBox and the treeview. When I select the TreeView after the TextBox I don't receive the LostFocus Event (for the TextBox) why?
I have tried to play a lot with Focusable and the focusableManager but .... it didn't helped me.
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Visibility="{Binding VariableA, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, Converter={StaticResource BoolToHiddenConverter}}
<TextBox Width="78" FocusManager.IsFocusScope="True"
PreviewTextInput="HatchingDistanceBox_PreviewTextInput"
Name="TextBoxAWhoShouldLostFocus" BorderThickness="0.5"
BorderBrush="White" MinHeight="30" Height="30" Text="{Binding SelectedFamille.VariableA}"
utilities:InputBindingsManager.UpdatePropertySourceWhenEnterPressed="TextBox.Text">
</TextBox>
<TreeView Name="TreeView_After" ItemsSource="{Binding FirstGeneration}" Focusable="True" Grid.ColumnSpan="3" Grid.Row="2" Grid.Column="0" AllowDrop="True" Background="#282828" Margin="15, 0,0,0" >
<TreeView.Style>
<Style TargetType="{x:Type TreeView}">
<EventSetter Event="GotFocus" Handler="TreeViewItem_GotFocus"></EventSetter>
</Style>
</TreeView.Style>
<i:Interaction.Behaviors>
<utilities:TreeViewSelectionBehavior SelectedItem="{Binding SelectedFamille}"/>
</i:Interaction.Behaviors>
<TreeView.Resources>
<DataTemplate x:Key="NormalTemplate">
<StackPanel Orientation="Horizontal" Name="StrategyNamePanel" Mouse.PreviewMouseDown="StrategyNamePanel_MouseDown" Width="200" Background="#282828" Focusable="True" FocusManager.IsFocusScope="True">
<TextBox Name="StrategyNameBox" FontWeight="Normal" FocusManager.IsFocusScope="True" Text="{Binding Name, Mode=TwoWay, UpdateSourceTrigger=Explicit}" MinHeight="30" Height="30" BorderThickness="0" utilities:InputBindingsManager.UpdatePropertySourceWhenEnterPressed="TextBox.Text"></TextBox>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="EditTemplate">
<StackPanel Orientation="Horizontal" Name="NamePanel" Focusable="True" Mouse.PreviewMouseDown="NamePanel_MouseDown" Width="200" Background="{StaticResource DarkGrey}" FocusManager.IsFocusScope="True">
<TextBox Name="NameBox" FontWeight="Normal" BorderBrush="{StaticResource DarkOrange}" FocusManager.IsFocusScope="True" Text="{Binding Name, Mode=TwoWay, UpdateSourceTrigger=Explicit}" MinHeight="30" Height="30" utilities:InputBindingsManager.UpdatePropertySourceWhenEnterPressed="TextBox.Text" ></TextBox>
</StackPanel>
</DataTemplate>
</TreeView.Resources>
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<EventSetter Event="GotFocus" Handler="TreeViewItem_GotFocus"></EventSetter>
<EventSetter Event="TreeViewItem.DragOver" Handler="TreeView_After_DragOver"/>
<EventSetter Event="TreeViewItem.Drop" Handler="TreeView_After_Drop"/>
<EventSetter Event="TreeViewItem.MouseMove" Handler="TreeView_After_MouseMove"/>
<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
</Style>
</TreeView.ItemContainerStyle>
</TreeView>
The LostFocus from the textbox work when I click everywhere except in the TreeView
2) The lostFocus work if I first select a parent in the treeView and then a Treeview Item.
3)When I first select a treeViewItem and Then an Another treeViewItem there is no more LostFocus Event.
Why????
Related
I have to change Background color of an ItemTemplate of a ListBox, depending the value of a boolean.
Here is my ListBox :
<ListBox Name="itemListBox"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectionChanged="itemListBox_SelectionChanged">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<StackPanel Width="200">
<TextBlock FontSize="10"
FontWeight="Bold"
VerticalAlignment="Center"
Text="{Binding Path=Value.DocID}" />
<TextBlock FontSize="10"
VerticalAlignment="Center"
TextWrapping="Wrap"
Text="{Binding Path=Value.Serial}"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
If the user delete an Item, I want to show him in grey backrgound.
Precision : The ListBox is binded to a Dictionnary, that contains a boolean value "IsDeleted".
Sorry for the poor English.
Thank you
You could use an ItemContainerStyle with a DataTrigger:
<ListBox Name="itemListBox" ScrollViewer.VerticalScrollBarVisibility="Visible" SelectionChanged="itemListBox_SelectionChanged">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Style.Triggers>
<DataTrigger Binding="{Binding Value.IsDeleted}" Value="True">
<Setter Property="Background" Value="Gray" />
</DataTrigger>
</Style.Triggers>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<StackPanel Width="200">
<TextBlock FontSize="10" FontWeight="Bold" VerticalAlignment="Center" Text="{Binding Path=Value.DocID}" />
<TextBlock FontSize="10" VerticalAlignment="Center" TextWrapping="Wrap" Text="{Binding Path=Value.Serial}"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Make sure that the class with the IsDeleted property implements the INotifyPropertyChanged interface correctly if you intend to set the property dynamically and want the background to get updated accordingly.
I need some advice. We noticed unusual behavior within the ScrollViewer. I have a StackPanel with whom I am more items including ListBox when the StackPanel placed in a ScrollViewer, when loading data to the listbox, a program for a brief moment freezes. When I am alone ListBox but everything works normally, no freezing of the program.
Here is my code:
<ScrollViewer VerticalScrollBarVisibility="Auto">
<StackPanel x:Name="tStack" >
<Grid Height="300">
</Grid>
<Grid Height="300">
</Grid>
<ListBox x:Name="ListBox1" ItemsSource="{Binding AlbumsCvs.View, IsAsync=True}"
Style="{StaticResource ListBoxAlbumsTracksStyles}"
VirtualizingStackPanel.IsVirtualizing="True"
VirtualizingPanel.IsVirtualizingWhenGrouping="True"
VirtualizingStackPanel.VirtualizationMode="Recycling" >
<ListBox.GroupStyle>
<GroupStyle ContainerStyle="{StaticResource AlbumsHeader}" />
</ListBox.GroupStyle>
</ListBox>
</StackPanel>
</ScrollViewer>
<Style x:Key="ListBoxAlbumsTracksStyles" TargetType="{x:Type ListBox}">
<Setter Property="Padding" Value="0,0,0,0" />
<Setter Property="Margin" Value="0,0,0,0" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="Background" Value="Transparent"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Hidden" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate >
<DockPanel>
<Border Background="#00000000"
Height="36"
Width="{Binding Path=ActualWidth, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ScrollContentPresenter}}}">
<DockPanel>
<TextBlock x:Name="TrackNumber"
DockPanel.Dock="Left" Margin="2,0,5,0"
Text="{Binding TrackNumber}"
VerticalAlignment="Center"
FontSize="13"
MinWidth="17"
Foreground="Black"/>
<DockPanel>
<TextBlock DockPanel.Dock="Left"
Text="{Binding TrackTitle}"
TextAlignment="Left"
FontSize="13"
VerticalAlignment="Center"
HorizontalAlignment="Stretch"
TextTrimming="CharacterEllipsis"
Margin="0,0,2,0"/>
<TextBlock DockPanel.Dock="Right"
Text="{Binding Duration}"
VerticalAlignment="Center"
HorizontalAlignment="Stretch"
TextTrimming="CharacterEllipsis"
Margin="0,0,10,0"
FontSize="13" TextAlignment="Right"/>
</DockPanel>
</DockPanel>
</Border>
</DockPanel>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- GroupItem -->
<Style x:Key="AlbumsHeader" TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border Width="{Binding Path=ActualWidth, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ScrollContentPresenter}}}" Background="#00000000">
<StackPanel Margin="0,0,0,15">
<StackPanel>
<TextBlock Text="{Binding AlbumName}"
DataContext="{Binding Items}"
Margin="0,5,0,0"
HorizontalAlignment="Stretch"
FontSize="20"
FontWeight="Light"
TextTrimming="CharacterEllipsis"
Foreground="Black"/>
<TextBlock Text="{Binding IdAlbum}"
DataContext="{Binding Items}"
Margin="0,0,0,10"
HorizontalAlignment="Stretch"
TextTrimming="CharacterEllipsis"
Foreground="Black"/>
</StackPanel>
<ItemsPresenter HorizontalAlignment="Stretch"/>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
code behind:
private async Task AlbumsArtistInformation()
{
if (string.IsNullOrEmpty(ArtistName))
return;
ObservableCollection<AlbumsArtistCollections> _albumsArtistCollections =
new ObservableCollection<AlbumsArtistCollections>();
try
{
var search = await spotifyDataService.GetArtists(ArtistName);
if (search == null) throw new ArgumentNullException(nameof(search));
foreach (var _artist in search.Artists.Items.Take(1))
{
this.IdArtist = _artist.Id;
}
var _artistAlbum = await spotifyDataService.GetArtistsAlbumsAsync(this.IdArtist, AlbumType.All);
if (_artistAlbum == null) throw new ArgumentNullException(nameof(_artistAlbum));
_albumsArtistCollections = _artistAlbum;
}
finally
{
// Unbind to improve UI performance
Application.Current.Dispatcher.Invoke(() =>
{
this.Albums = null;
this.AlbumsCvs = null;
});
Application.Current.Dispatcher.Invoke(() =>
{
this.Albums = _albumsArtistCollections;
});
Application.Current.Dispatcher.Invoke(() =>
{
// Populate CollectionViewSource
this.AlbumsCvs = new CollectionViewSource { Source = this.Albums };
//Group by Album if needed
this.AlbumsCvs.GroupDescriptions.Add(new PropertyGroupDescription("IdAlbum"));
});
}
}
Does anyone know how to solve this problem.
Vertically oriented StackPanel provides an unbounded available space for the the ListBox, when it calls MeasureOverride(Size availableSize) method, during layout. Therefore, the ListBox (which by default uses virtualization) should create the whole items and this is why you program freezes for a moment.
Therefore, use a DockPanel instead:
<DockPanel x:Name="tStack" LastChildFill="True" >
<Grid DockPanel.Dock="Top" Height="300">
</Grid>
<Grid DockPanel.Dock="Top" Height="300">
</Grid>
<ListBox DockPanel.Dock="Bottom" x:Name="ListBox1" ItemsSource="{Binding AlbumsCvs.View, IsAsync=True}"
Style="{StaticResource ListBoxAlbumsTracksStyles}"
VirtualizingStackPanel.IsVirtualizing="True"
VirtualizingPanel.IsVirtualizingWhenGrouping="True"
VirtualizingStackPanel.VirtualizationMode="Recycling" >
<ListBox.GroupStyle>
<GroupStyle ContainerStyle="{StaticResource AlbumsHeader}" />
</ListBox.GroupStyle>
</ListBox>
</DockPanel>
LastChildFill is true by default. The ListBox should be the last element, in order to fill the space.
As another option, you can set the Height of the ListBox and put the DockPanel in a ScrollViewer or you can consider a Grid with splitters as another option.
I have created a listview with databinding and a "Itemstemplate" which takes a "Datatemplate" where I have a Stackpannel but the style doesn't apply to the stackpannel, there is no space between the textblocks in the stackpannel:
<ListView Grid.Row="1" DataContext="{Binding Source={StaticResource ViewModel}}" ItemsSource="{Binding}" ScrollViewer.VerticalScrollBarVisibility="Visible">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Background="Gray" >
<StackPanel.Resources>
<Style TargetType="TextBlock" x:Key="margintextblock">
<Setter Property="Margin" Value="10,0,0,0"/>
</Style>
</StackPanel.Resources>
<TextBlock Style="{StaticResource listviewtextblock}" Text="{Binding Path=Firstname}" Foreground="Gold"></TextBlock>
<TextBlock Style="{StaticResource listviewtextblock}" Text="{Binding Path=Lastname}" Foreground="Black"></TextBlock>
<TextBlock Style="{StaticResource listviewtextblock}" Text="{Binding Path=Id}" Foreground="OrangeRed"></TextBlock>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
So what's wrong?
You have to remove x:Key="margintextblock" because of this the style doesn't apply automatically to the TextBlocks
By setting the x:Key property on a style, you are telling WPF that you only want to use this style when you explicitly reference it on a specific control.
Take a look on this tutorial
EDITED
And you also have another problem - you are setting style for you TextBlocks Style="{StaticResource listviewtextblock}"
In this case what you have to do is inherit StackPanel TextBlock style from listviewtextblock style
<StackPanel.Resources>
<Style TargetType="TextBlock" BasedOn="{StaticResource listviewtextblock}">
<Setter Property="Margin" Value="10,0,0,0"/>
</Style>
</StackPanel.Resources>
And remove style Style="{StaticResource listviewtextblock}" from TextBlocks
you code should looks like this
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Background="Gray" >
<StackPanel.Resources>
<Style TargetType="TextBlock" BasedOn="{StaticResource listviewtextblock}" >
<Setter Property="Margin" Value="10,0,0,0"/>
</Style>
</StackPanel.Resources>
<TextBlock Text="{Binding Path=Firstname}" Foreground="Gold"></TextBlock>
<TextBlock Text="{Binding Path=Lastname}" Foreground="Black"></TextBlock>
<TextBlock Text="{Binding Path=Id}" Foreground="OrangeRed"></TextBlock>
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
I want to show a list of items horizontally and be able to select from this list of items - I have tried using a listview and changing the item template per some posts on stack and I have this:
<ListView Height="Auto" HorizontalAlignment="Left" Margin="24,0,0,0" Name="MachinesListView" VerticalAlignment="Top" Width="1455" Background="#FFF0F0F0" ItemsSource="{Binding Machines}" BorderBrush="#FFF0F0F0" Grid.ColumnSpan="2" Grid.Row="2" SelectionChanged="MachinesListView_SelectionChanged">
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Width="{Binding (FrameworkElement.ActualWidth),
RelativeSource={RelativeSource AncestorType=ScrollContentPresenter}}"
ItemWidth="{Binding (ListView.View).ItemWidth,
RelativeSource={RelativeSource AncestorType=ListView}}"
MinWidth="{Binding ItemWidth, RelativeSource={RelativeSource Self}}"
ItemHeight="{Binding (ListView.View).ItemHeight,
RelativeSource={RelativeSource AncestorType=ListView}}" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Height" Value="175"/>
<Setter Property="Width" Value="275"/>
<Setter Property="Margin" Value="5,5,0,0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<Border BorderBrush="Gray" BorderThickness="2" CornerRadius="10">
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding Machine.MachineId}" TextAlignment="Center" Width="Auto" Foreground="#FF639A70" FontSize="19"/>
<TextBlock Text="{Binding Machine.Name}" TextAlignment="Center" Width="Auto" Foreground="Gray" FontSize="15" />
<Image Source="/URM;component/Images/slot_machine-512.png" Height="60" Width="60" />
<TextBlock Text="{Binding Machine.Description}" TextAlignment="Center" Width="Auto" Foreground="Gray" FontSize="15" Margin="0, 5, 0, 0"/>
<TextBlock TextAlignment="Center" Width="Auto" Foreground="Gray" FontSize="15" Margin="0, 5, 0, 0">
<Run Text ="Actual: "/>
<Run Text ="{Binding Actual, StringFormat=' {0:c}'}"/>
</TextBlock>
<TextBlock TextAlignment="Center" Width="Auto" Foreground="Gray" FontSize="15" Margin="0, 5, 0, 0">
<Run Text ="OverShort: "/>
<Run Text ="{Binding OverShort, StringFormat=' {0:c}'}"/>
</TextBlock>
</StackPanel>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
</ListView>
This works well...I get the overall look and feel that I want from this but only selecting the first item causes the selectionchanged event to fire...
I thought about implementing the items as buttons instead but I thought there might be a more proper way of dealing with this.
Set Background to Transparent on outer most border of ControlTemplate.
<Border BorderBrush="Gray" Background="Transparent"
BorderThickness="2" CornerRadius="10">
By default it's {x:Null} which is not responsive to mouse events.
You will see that item gets selected only in case you click over image
or any control present in template but when you click on empty area
within border, selectionChange event doesn't fire since it is
unresponsive to mouse events (specifically MouseClick in your case). Setting background to Transparent will make it responsive to all mouse events.
Refer to this for more details - {x:Null} Vs. Transparent.
i have one problem with tooltip.
I want to add templated tooltip to button with some information inside.
Here the button with tooltip, which datacontext bounded to some viewmodel:
<fluent:Button DataContext="{Binding NewConnections, Source={StaticResource Locator}}" Command="{Binding AddCloudStorageAccount}" Header="Add Account">
<fluent:Button.LargeIcon>
<Image Source="pack://application:,,,/Icons;component/UI/v1/add_account.png" Width="48"/>
</fluent:Button.LargeIcon>
<fluent:Button.ToolTip>
<ToolTip DataContext="{Binding UserInput.AddAccountsButtonInfo, Source={StaticResource Locator}}" Style="{StaticResource ButtonTooltip}"></ToolTip>
</fluent:Button.ToolTip>
</fluent:Button>
Style:
<Style TargetType="ToolTip" x:Key="ButtonTooltip">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Border Background="LightYellow" BorderThickness="0.5" BorderBrush="Maroon">
<StackPanel Orientation="Vertical" Margin="3">
<TextBlock x:Name="_txtText" Text="{Binding Title}"></TextBlock>
<TextBlock x:Name="_txtDescription" Margin="0 10 0 0" Text="{Binding Description}"></TextBlock>
<TextBlock x:Name="_txtHotKeyDescription" Margin="0 10 0 0" Text="{Binding HotKeyDescription}"></TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
I set some breakpoints to see if viewmodel is accessed. And it's ok. But properties like Title not accessed at all and i see only empty rectangle without any text
Do someone have some ideas?
Just resolved it(set datacontext in border). Maybe someone will be interested in:
<Style TargetType="ToolTip" x:Key="ButtonTooltip">
<Setter Property="ContentTemplate">
<Setter.Value>
<DataTemplate>
<Border Background="LightYellow" BorderThickness="0.5" BorderBrush="Maroon" DataContext="{Binding Path=DataContext, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ToolTip}}}">
<StackPanel Orientation="Vertical" Margin="3">
<TextBlock x:Name="_txtText" Text="{Binding Title}"></TextBlock>
<TextBlock x:Name="_txtDescription" Margin="0 10 0 0" Text="{Binding Description}"></TextBlock>
<TextBlock x:Name="_txtHotKeyDescription" Margin="0 10 0 0" Text="{Binding HotKeyDescription}"></TextBlock>
</StackPanel>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>