Ok. I have attached a project that replicates both issues I am seeing. So basically I'm not doing any of the binding myself; I let the grid do it for me. In my actual xaml, I define my own field, editor types and edit as, but the behavior is exactly the same as allowing the grid to create the fields on its own. 

Thanks,

-Szymon 

Szymon,

Thank you for the sample.

Two thoughts:

Use ObservableCollection instead of ILIst. ObservableCollection is an ILIst which works better with dynamic updating.

Have you installed the 7.2 HotFix? I am not having an update problem with the sample you sent me.

Thanks

 I installed the hot fix. I no longer see the initial load problem in which the checkboxes are grayed out (issue #1), but I still have issue #2.

 Are you really not seeing the same issue? To reiterate, both checkboxes cannot be checked at the same time. Ever. What I am seeing now is that I can have that intermediate state when I click on a checkbox. Only after I unfocus from the checkbox does the setter get called, and my logic get invoked.

I see the issue you are talking about. The internal binding UpdateSourceTrigger needs to be changed from the default "LostFocus" to "PropertyChanged". I will look into how to do this and post the solution.

For now, I'm using the following workaround:

1.  Add the following Field settings to my boolean fields:

                <igDP:Field.Settings>
                  <igDP:FieldSettings AllowEdit="True" EditAsType="{x:Type sys:Boolean}" EditorType="{x:Type igEditors:XamCheckEditor}" LabelWidth="60" CellWidth="60">
                    <igDP:FieldSettings.EditorStyle>
                      <Style TargetType="{x:Type igEditors:XamCheckEditor}">
                        <EventSetter Event="ValueChanged" Handler="HandleValueChangedAccept" />
                      </Style>
                    </igDP:FieldSettings.EditorStyle>

                  </igDP:FieldSettings>
                </igDP:Field.Settings>

and:

                <igDP:Field.Settings>
                  <igDP:FieldSettings AllowEdit="True" EditAsType="{x:Type sys:Boolean}" EditorType="{x:Type igEditors:XamCheckEditor}" LabelWidth="60" CellWidth="60" >
                    <igDP:FieldSettings.EditorStyle>
                      <Style TargetType="{x:Type igEditors:XamCheckEditor}">
                        <EventSetter Event="ValueChanged" Handler="HandleValueChangedRollback" />
                      </Style>
                    </igDP:FieldSettings.EditorStyle>
                  </igDP:FieldSettings>
                </igDP:Field.Settings>

I am hooking a handler to the ValueChanged event on the XamCheckEditor.

2.  Implement the handling methods:

       void HandleValueChangedAccept(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            bool newValue = (bool)e.NewValue;
            if (!newValue) return;

            DependencyObject o = Infragistics.Windows.Utilities.GetAncestorFromType(e.OriginalSource as DependencyObject, typeof(DataRecordCellArea), true);
            DataRecordCellArea dataRecord = o as DataRecordCellArea;
            if (dataRecord == null) return;
           
            DAO dao = dataRecord.Record.DataItem as DAO ;
            dao.Accept = (bool)e.NewValue;
        }

        void HandleValueChangedRollback(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            bool newValue = (bool)e.NewValue;
            if (!newValue) return;

            DependencyObject o = Infragistics.Windows.Utilities.GetAncestorFromType(e.OriginalSource as DependencyObject, typeof(DataRecordCellArea), true);
            DataRecordCellArea dataRecord = o as DataRecordCellArea;
            if (dataRecord == null) return;

            DAO dao = dataRecord.Record.DataItem as DAO ;
            dao .Rollback = (bool)e.NewValue;
        }

Notice that my logic dictates that two values cannot be set to true. My DAO setters handle this logic. But this creates an opportunity for an infinite loop. Since dao.Rollback may change the value of dao.Accept, the ValueChanged handlers for the checkboxes may keep on calling each other infinitely. For this purpose, I make sure that the handler doesn't do anything if the new value is false.

So this is a bit of a hackish way to do this, but it works. Chris, let me know if there's a more elegant way to do this using the UpdateSourceTrigger property of the internal binding.

 -Szymon

I implemented this approach, because I did not see an alternative as of yet.  The approach works great, with one exception. 

I am defining my grids FieldSettings as follows:

<igDP:FieldSettings AllowEdit="True" 

CellClickAction="EnterEditModeIfAllowed"

AllowGroupBy="False"/>

</igDP:XamDataGrid.FieldSettings>

I expected that when I entered the cell, either via Tab, or mouse click, that I enter the edit mode, however this does not happen when applying this style, and the user cannot edit the values of the checkbox with just the keyboard.  Any way to force the cell to enter edit mode?

Thanks.

Is there a fix for this yet?

The implementation that you have suggested has a flaw, if I tab into the cell with the checkbox, the cell has the focus and not the check box, so using the space bar to toggle between check/uncheck mode does not work.

Any idea how I might be able to solve the problem?

I implemented the xamdatagrid with checkboxes (placed in Cellvalue presenter) I added checked unchecked events for the check box. But i am facing one problem . On scroll of the xamdatagrid scroll bar level. I am seeing some of the check boxes are checked and unchecked. My application is behaving differntly. Can you please give some inputs on this.

I implemented the  sample like this

<Window x:Class="Scrollbarissue_OnlyCheckBox.Window2"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:igDP="http://infragistics.com/DataPresenter"

xmlns:sys="clr-namespace:System;assembly=mscorlib"

Title="Window2" Height="300" Width="300">

<Grid>

<igDP:XamDataGrid Name="myGrid" Height="250">

<igDP:XamDataGrid.Resources>

<Style TargetType="{x:Type igDP:CellValuePresenter}" x:Key="BoolFieldOverride">

<Setter Property="Template">

<Setter.Value>

<ControlTemplate TargetType="{x:Type igDP:CellValuePresenter}">

<CheckBox HorizontalAlignment="Center" VerticalAlignment="Center"

IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Content}"/>

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

</igDP:XamDataGrid.Resources>

<igDP:XamDataGrid.FieldLayoutSettings>

<igDP:FieldLayoutSettings AutoGenerateFields="False" />

</igDP:XamDataGrid.FieldLayoutSettings>

<igDP:XamDataGrid.FieldLayouts>

<igDP:FieldLayout>

<igDP:FieldLayout.Fields>

<igDP:Field Name="Id" Label="GUID" >

<igDP:Field.Settings>

<igDP:FieldSettings CellMinWidth="250" CellWidth="250" />

</igDP:Field.Settings>

</igDP:Field>

<igDP:Field Name="Rollback" Label="Option Rollback" >

<igDP:Field.Settings>

CellValuePresenterStyle="{StaticResource BoolFieldOverride}"/>

</igDP:Field.Settings>

</igDP:Field>

<igDP:Field Name="Accept" Label="Option Accept" >

<igDP:Field.Settings>

<igDP:FieldSettings CellMinWidth="50" CellWidth="50"

CellValuePresenterStyle="{StaticResource BoolFieldOverride}"/>

</igDP:Field.Settings>

</igDP:Field>

</igDP:FieldLayout.Fields>

</igDP:FieldLayout>

</igDP:XamDataGrid.FieldLayouts>

</igDP:XamDataGrid>

</Window>

/// <summary>

/// Interaction logic for Window2.xaml

/// </summary>

public partial class Window2 : Window

DataObject dataObj;

dataObj.Id = Guid.NewGuid().ToString();

dataObj.Id = Guid.NewGuid().ToString();

dataObj = new DataObject();

dataObj.Rollback = false;

public class DataObject

public bool Accept { get; set; }