How to draw the user's attention only to some items of a ListBox

mauede 221 Reputation points
2022-04-12T16:36:43.687+00:00

192350-gui.png

I wonder whether it is possible to highlight or change the color of the text or place a symbol (for example "!") or something else to attract the user's attention only on some items of the rightmost ListBox in the attached GUI.

The reason is to reduce the user's time devote to double-checking the goodness of automatically renamed clinical structures.

Thank you.

Windows Presentation Foundation
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C#
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Accepted answer
  1. Hui Liu-MSFT 38,251 Reputation points Microsoft Vendor
    2022-04-15T08:04:37.583+00:00

    You could try to refer to the code below. You can also refer to here.
    MainWindow.xmal:

      <StackPanel>  
            <ListBox x:Name="EditableStructs"   SelectionMode="Single" Width="400"  Background="PowderBlue" Height="300"  
                                ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.CanContentScroll="True"   
                     ItemsSource="{Binding AutoNames,Mode=TwoWay}"  >  
    
                <ListBox.ItemTemplate>  
                    <DataTemplate>  
                        <Grid x:Name="grid">  
                            <Grid.ColumnDefinitions>  
                                <ColumnDefinition Width="Auto"/>  
                                <ColumnDefinition Width="Auto"/>  
                                <ColumnDefinition Width="*"/>  
                            </Grid.ColumnDefinitions>  
                            <TextBlock Name="TextInd" Text="{Binding NamInd, Mode=OneWay}"  Grid.Column="0" Padding="1,5" HorizontalAlignment="Stretch"/>  
                            <CheckBox IsChecked="{Binding IsAccepted, Mode=TwoWay}" Grid.Column="1"  Padding="5,5" VerticalAlignment="Center" HorizontalAlignment="Center"  />  
                            <TextBox Text="{Binding  StrName, Mode=TwoWay}"  Background="{Binding MyBackground}"  Grid.Column="2" HorizontalAlignment="Stretch"/>  
                        </Grid>  
                        <DataTemplate.Triggers>  
                            <DataTrigger Binding="{Binding Path= SpecialFeatures}">  
                                <DataTrigger.Value>  
                                    <local:SpecialFeatures>Color</local:SpecialFeatures>  
                                </DataTrigger.Value>  
                                <DataTrigger.Setters>  
                                    <Setter Property="Background" Value="DodgerBlue" TargetName="grid" />  
    
                                </DataTrigger.Setters>  
                            </DataTrigger>  
                            <DataTrigger Binding="{Binding Path= SpecialFeatures}">  
                                <DataTrigger.Value>  
                                    <local:SpecialFeatures>Highlight</local:SpecialFeatures>  
                                </DataTrigger.Value>  
                                <DataTrigger.Setters>  
                                    <Setter Property="Background" Value="Orange" TargetName="grid" />  
                                </DataTrigger.Setters>  
                            </DataTrigger>  
                            <DataTrigger Binding="{Binding Path= SpecialFeatures}">  
                                <DataTrigger.Value>  
                                    <local:SpecialFeatures>None</local:SpecialFeatures>  
                                </DataTrigger.Value>  
                                <DataTrigger.Setters>  
                                    <Setter Property="Background" Value="white" TargetName="grid" />  
                                </DataTrigger.Setters>  
                            </DataTrigger>  
                        </DataTemplate.Triggers>  
                    </DataTemplate>  
    
                </ListBox.ItemTemplate>  
            </ListBox>  
        </StackPanel>  
    

    MainWindow.xaml.cs:

    using System.Collections.Generic;  
    using System.Collections.ObjectModel;  
    using System.ComponentModel;  
    using System.Windows;  
    
    namespace ListBoxBackgroundDemo  
    {  
      public partial class MainWindow : Window  
      {  
        public ObservableCollection<EditableStructures> AutoNames{ get;set;}  
        public List<string> EditedList=new List<string>(){ "name1", "name2", "name3", "name4", "name5", "name6" };  
        int j =0;  
        public MainWindow()  
        {  
          InitializeComponent();  
          AutoNames = new ObservableCollection<EditableStructures>();  
          DataContext =this;  
          foreach (string str in EditedList)  
          {  
            if (j % 3 == 0)  
            {  
              AutoNames.Add(new EditableStructures { StrName = str, IsAccepted = false, NamInd = j, SpecialFeatures = SpecialFeatures.Highlight });  
            }  
            else if(j%3==1)  
            {  
              AutoNames.Add(new EditableStructures { StrName = str, IsAccepted = false, NamInd = j, SpecialFeatures = SpecialFeatures.Color });  
            }  
            else  
            {  
              AutoNames.Add(new EditableStructures { StrName = str, IsAccepted = false, NamInd = j, SpecialFeatures = SpecialFeatures.None });  
            }  
            j++;  
          }  
    
          EditableStructs.ItemsSource = (System.Collections.IEnumerable)AutoNames;  
        }  
    
      }  
      public enum SpecialFeatures  
      {  
        None,  
        Color,  
        Highlight  
      }  
      public class EditableStructures : INotifyPropertyChanged  
      {  
        public string StrName { get;set;}  
        public bool IsAccepted { get;set;}  
        public int NamInd { get;set;}  
        private SpecialFeatures _specialFeatures;  
        public SpecialFeatures SpecialFeatures  
        {  
          get { return _specialFeatures; }  
          set  
          {  
            _specialFeatures = value;  
            OnPropertyChanged("SpecialFeatures");  
          }  
        }  
        public event PropertyChangedEventHandler PropertyChanged;  
    
        protected void OnPropertyChanged(string name)  
        {  
          PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));  
        }  
      }  
    }  
    

    The result:
    193325-image.png


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1 additional answer

Sort by: Most helpful
  1. mauede 221 Reputation points
    2022-04-13T12:07:32.933+00:00

    @Hui Liu-MSFT

    Sure. Thank you.
    The rightmost ListBox is defined as follows because the displayed strings can be edited by the user:

     <ListBox x:Name="EditableStructs" Grid.Row="5" Grid.Column="1" Margin="930,62,0,40"  SelectionMode="Single"  Grid.ColumnSpan="2" Background="PowderBlue" Height="500"  
                               ScrollViewer.VerticalScrollBarVisibility="Visible" ScrollViewer.CanContentScroll="True"  ItemsSource="{Binding AutoNames,Mode=TwoWay}" HorizontalAlignment="Left" Width="220"  >  
                <ListBox.ItemTemplate>  
                    <DataTemplate>  
                        <Grid>  
                            <Grid.ColumnDefinitions>  
                                <ColumnDefinition Width="Auto"/>  
                                <ColumnDefinition Width="Auto"/>  
                                <ColumnDefinition Width="*"/>  
                            </Grid.ColumnDefinitions>  
                            <TextBlock Name="TextInd" Text="{Binding NamInd, Mode=OneWay}" Background="{Binding TheBackground}"  Grid.Column="0" Padding="1,5" HorizontalAlignment="Stretch"/>  
                            <CheckBox IsChecked="{Binding IsAccepted, Mode=TwoWay}" Grid.Column="1"  Padding="5,5" VerticalAlignment="Center" HorizontalAlignment="Center"  />  
                            <TextBox Text="{Binding  StrName, Mode=TwoWay}"  Grid.Column="2" HorizontalAlignment="Stretch"/>  
                        </Grid>  
                    </DataTemplate>  
                </ListBox.ItemTemplate>  
            </ListBox>  
    

    Data displayed in the rightmost ListBox are prepared in three sections and stored in List<string> RenamedStructNames

    Section_1 The strings (structure names) from a patient that exactly match a protocol defined string are copied to the List<string> RenamedStructNames:

    Section-2 Patient structures that pertain to the tumor have standard root names followed by numbers that indicate the radiation dose levels. So the match between the patient structures and the protocol-defined tumor structures can only be made on the root names allowing for different radiation dose levels. Examples:
    "GTV_3000", "PTV_7000", "CTV_6000", "ITV_5500", "IGTV_8400"
    Patient structure names (strings) whose root matches a protocol-defined root name are
    are copied to the List<string> RenamedStructNames

    Section-3 The remaining patient structure names for which the Dice Coefficient algorithm is invoked to guess a name that is the most similar to the protocol-defined structure names. These are the structure names (strings) that have to be reviewed by the user. The ListBox items (TextBlocks) hosting these names have to display a background color different from the other items.

    The ListBox is populated with the content of the List<string> RenamedStructNames upon clicking a button as follows:

                foreach (string str in EditedList)  
                {  
                    AutoNames.Add(new EditableStructures { StrName = str,  IsAccepted = false, NamInd = j});  
                    j++;  
                }  
                UpdateAutoStrucNames();  
      
      
      public void UpdateAutoStrucNames()  
            {  
                EditableStructs.ItemsSource = (System.Collections.IEnumerable)AutoNames;  
            }  
    

    So the event that prepares the names to populate the ListBox is a Button-click.
    I don't think I need to implement INotifyPropertyChanged as the background color of some Listbox items is NOT changed because the item has been selected or edited. The background color must be different for items hosting the names generated in Section-3.
    The code knows the indexes of the "guessed" names in the List<string>. The order of the names is the same in List <string> RenamedStructNames is the same as they appear in the ListBox.
    I should change the background color of the ListBox items that host the "guessed" structure names as part of this event.
    The code knows the indexes of the List<string> that correspond to the "guessed" names.
    My question is:

    How can I change the background color of the ListBox items hosting the names generated in Section-3?<

    Ideally, I would like to access the ListBox items the same way as vector items are accessed through their index but the ListBox is a WPF control and I do not know how to access the single items in "setting mode" rather than in "getting mode".

    Thank you so much for all your help.

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