XamComboEditor Display texts | Infragistics Forums

495

XamComboEditor Display texts

Tng posted over 14 years ago

Hello,

I have a unique situation, it can be quite confusing, so I'll to dish it out as clear as I can.

I have an entity, we'll call it "Item", and that entity has an Nullable<int> (in my sample I just use int for simplicity) property called "IntDetail".

IntDetail could be one of these values: 10,20,30,40 - but in some cases the user can also specify some other number (int, for example 70). A Classic control for this scenario would be just a NumericEditor, but the client was very specific about wanting a ComboBox here. In that case, this becomes an IsEditable ComboBox.

I want the following to happen:

1. When the ComboBox is not in edit mode, the text displayed should be "x details" (for example: 20 details).

2. When I open the ComboBox, all the items appear as their value alone. (10, 20, etc.). The display text on the TextBox part of the ComboBox can display either the full string or the value, doesn't matter.

3. After selecting, the TextBox doesn't have to show the full string. Showing the full string after exiting EditMode is fine.

This sounds rather simple (and is that simple in a regular ComboBox), yet I'm having serious trouble with it in XamComboBox.

Following is code I tried to create this situation with:

using System.ComponentModel;
using System.Windows.Data;
using System;
using System.Collections.ObjectModel;
namespace IG_Test
{
    public partial class Window1
    {
        public Window1()
        {
            InitializeComponent();

            ObservableCollection<int> col = new ObservableCollection<int> { 10, 20, 30, 40 };
            combo1.ItemsSource = col;
            combo2.ItemsSource = col;
            combo3.ItemsSource = col;

            DataContext = new Item { IntDetail = 20 };
        }
    }

    public class Item : INotifyPropertyChanged
    {
        private int _intdetail;
        public int IntDetail
        {
            get
            {
                return _intdetail;
            }
            set
            {
                _intdetail = value;
                RaisePropertyChanged("IntDetail");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
        public void RaisePropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }

    public class SimpleConverter : IValueConverter
    {
        public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value == null || value == DBNull.Value)
                return "none selected";

            return System.Convert.ToInt32(value) + " deatils";
        }

        public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new System.NotImplementedException();
        }
    }
}

Comments:

1. ItemsSource with ValueToDisplayTextConverter - Doesn't work at all.

2. ItemsSource with ValueToTextConverter - Resets value when ComboBox is opened, If no value is then selected, it stays null.
Also shows "20 details" when selecting 20 and leaving focus, but does not do so when value is changed externally or when the window first loads. Also displays some red rectangle for a reason I didn't explore further.

3. ItemsSource with ValueToTextConverter and IsEditable - Same as above.

4. ItemsProvider with ComboBoxDataItems / ItemsProvider with ComboBoxDataItems and IsEditable - The best 'hack' I came up with. Works partially. Acts as expected when IsEditable=False, but does not display "70 details" when entering a new value.

Thank you for any help.

54937

Offline Andrew Smith [Infragistics] posted over 14 years ago in reply to Tng

tngdevteam said:
ok, please reply here if you have anything new (I'm subscribed to this thread).
Actually a case was created and associated with your account so you should receive emails to the email account associated with your id.

tngdevteam said:
I am trying to enforce the ComboBox editbox to accept int numbers only, and figured the easiest way to go about it would be to retemplate the ComboBox inside XamComboEditor and make it's internal TextBox a XamMaskedEditor with a mask like 'nnnn'.
The default edit template of the xamComboEditor uses a ComboBox. I'm guessing that the ComboBox expects to have a TextBox - it even has a TemplatePartAttribute on it for PART_EditableTextBox of type TextBox. TemplatePartAttribute is how a control publishes what it expects/wants to have within its ControlTemplate. You'd probably have to use a TextBox within that template, hook events on that TextBox and handle filtering the characters there.
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495

Tng posted over 14 years ago in reply to Andrew Smith [Infragistics]

ok, please reply here if you have anything new (I'm subscribed to this thread).

On another issue:

I maneuvered around this bug with some of the combo's events, however I have something else here.

I am trying to enforce the ComboBox editbox to accept int numbers only, and figured the easiest way to go about it would be to retemplate the ComboBox inside XamComboEditor and make it's internal TextBox a XamMaskedEditor with a mask like 'nnnn'.

In theory it sounds nice but in actuality I'm running into all sorts of strange phenomenons. I might be doing something wrong here, or the internal combobox is very sensetive to retemplating. could you please try and write the above and tell me if it's working for you?

Thank you.
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54937

Offline Andrew Smith [Infragistics] posted over 14 years ago

This should be a relatively straight forward task using the ValueToDisplayTextConverter but it seems like there is a bug here so I'm going to submit the issue and see about getting a case created for you for this so you can be notified when the issue is resolved.
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