Fixed Groups, CheckBox Header, TextAlignment

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Bradley Plett posted over 9 years ago

I'm a xamDataGrid newbie, so please bear with me. I'm in the process of learning how to use it. I should probably have put my questions in separate posts, but they're probably trivial enough that one person can answer all three.

I would like to group by one of the fields, but 1) I don't want the group to be expandable/contractable, 2) I don't want to show the "group by area", and 3) I always want the groups to display in a specific order, which may not be alphabetical.
In the examples, there is a nice sample of how to put a Checkbox in the record selector. The sample includes a checkbox in the grid header to check/uncheck all. How do I do that in a standard Checkbox column?
I have a TextField column that displays numbers. I'd like to right-align the text, but 'TextAlignment="Right"' doesn't seem to do it. How do I do that?

Thanks!

Brad.

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22015

[Infragistics]Gergana Dimitrova posted over 9 years ago

Hello Brad,

Thank you for posting!

I have been looking into your questions.

About question 1:

1.1 You can set the GroupByExpansionIndicatorVisibility property of the XamDataGrid FieldLayoutSettings to 'Collapsed'. This way when the user groups by a field the groups cannot be expanded.

1.2 If you do not want to show the GroupByArea you can set the GroupByAreaLocation property of the XamDataGrid to "None". This way the area would not be visible when the application is started. If you want to hide the area right after the user has grouped the XamDataGrid I can suggest handling the Grouped event of the XamDataGrid and set the 'IsExpanded' property of the GroupByAreaMulti to false. You can use the following code snippet in the handler of the Grouped event: (sender as XamDataGrid).GroupByAreaMulti.IsExpanded = false;

1.3 In what specific order do you want to display the Groups?

About question 2:

2. Regarding the question about the checkbox in the Label of a Field in the XamDataGrid - I can suggest to take a look at the following forum threads where similar scenarios are discussed: http://ko.infragistics.com/community/forums/t/61950.aspx, http://ko.infragistics.com/community/forums/t/37921.aspx.

About question 3:

3. The TextField of the XamDataGrid uses the XamTextEditor for displaying and editing the data. This is why you can create a style for the XamTextEditor and set the HorizontalContentAlignment property of the XamTextEditor. Here is an example of the above mentioned functionality:

<Style TargetType="{x:Type igEditors:XamTextEditor}">

<Setter Property="HorizontalContentAlignment" Value="Right"/>

</Style>

Please do not hesitate to let me know if you have any further questions on this matter.
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Offline Bradley Plett posted over 9 years ago in reply to [Infragistics]Gergana Dimitrova
Thank-you so much for your quick response!

There may have been a slight misunderstanding. I don't want the user to select the grouping. I want to display the grid with a set/fixed grouping on one of the fields. I want to specify the grouping in my XAML (or code-behind or whatever).

Yes, setting "GroupByExpansionIndicatorVisibility" to "Collapsed" hides the selector as desired, but it also collapses the groups. I'd like the groups expanded.

Yes, setting the "GroupByAreaLocation" to "None" hides it the way I want.

The order is somewhat complicated. I'm sorting on an enumeration for which I've provided a "SortOrder", but that's a separate discussion. If this isn't easy, I won't worry about it.

With the help of those examples, I've managed to get the checkbox header to contain a checkbox. However, I'm using MVVM, so I don't want to hook up an event handler in my code-behind. I would prefer to bind the checkbox's "IsChecked" property, but I can't seem to figure out the appropriate path. Alternatively, if I could bind the "Checked" event to an ICommand, that would work.

The style you show works if I want to apply it to all text fields. However, if I want it to be a named style, I've been unable to figure out how to apply it.

Thanks!

Brad.
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Offline Bradley Plett posted over 9 years ago in reply to [Infragistics]Gergana Dimitrova
I'm getting closer, but I'm not there yet.

As I said, I want to pre-define the grouping, preferably in the XAML.

How do I specify the field that I want to group by?

I don't want the field that I'm grouping by to appear in the table. How do I do that? (I have a work-around, but it's in the code-behind, which I'm trying to avoid. Also, I assume that if I can get #1 working, I can just set the field's visibility appropriately.)

Is it possible to display the column headers above the group header so that the column headers are displayed only once rather than for each group? If so, how?

I'm very interested in the "behavior" you describe. Can you elaborate?

How do I specify the sort order of the "group by"? (would be nice, but low priority

That fits the bill nicely, thanks!

Yes, that works well. My follow-up question is: can I get a read-write property to behave the same way as a read-only property does? I have set the field to be read-only, and whereas it's true that the value can't be edited, the field does appear differently when it has focus. This does not happen with fields based on read-only properties.

Here's an additional (bonus :-) question: with a "normal" checkbox's "IsChecked" binding, I have access to "UpdateSourceTrigger". How do I set that for a "CheckBoxField"?

Thanks again!

Brad.
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Offline Bradley Plett posted over 9 years ago in reply to Bradley Plett
OK, I've made some more progress on the grouping:

To specify the field to group by in XAML, use "<igWPF:FieldLayout.SortedFields>".

To hide the field, set its visibility.

To show the headers only once, use "HeaderPlacement" of the "FieldLayoutSetting".

To expand the groups, use the "xdgSample_InitializeRecord" sample from http://stackoverflow.com/questions/20096358/infragistics-xamdatagrid-group-by-on-load-in-wpf.

Left to figure out:

Can I get a read-write property to behave the same way as a read-only property does? (See above for more description.)

How do I get the "UpdateSourceTrigger" to work properly? I've tried putting it into the "AlternateBinding", but that doesn't seem to be sufficient. What I'm trying to accomplish is to have the property's setter get triggered immediately upon the user's clicking the ckeckbox rather than waiting until focus is lost.

Thanks!

Brad.
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Verified Answer
[Infragistics]Gergana Dimitrova posted over 9 years ago in reply to Bradley Plett

Hello Brad,

Thank you for the feedback. I am glad that you have found solutions to some of your issue.

Regarding the first one of the two questions in your latest post - as this question is not connected with the once in your original post I could suggest creating a separate forum thread(or a support ticket) as this would helpful is other community members are facing the same issue to find the solution to their issues faster.

Regarding your second question - I can suggest setting the DataItemUpdateTrigger property of the FieldSettings of the XamDataGrid to OnCellValueChange. More about this property you can find on the following link from our documentation: http://help.infragistics.com/Help/Doc/WPF/2015.1/CLR4.0/html/InfragisticsWPF4.DataPresenter.v15.1~Infragistics.Windows.DataPresenter.DataItemUpdateTrigger.html

Please do not hesitate to let me know if you have any further questions on this matter.
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Offline Bradley Plett posted over 9 years ago in reply to [Infragistics]Gergana Dimitrova

Perfect. Thanks a lot!

Brad.
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[Infragistics]Gergana Dimitrova posted over 9 years ago in reply to Bradley Plett

Hi Brad,

Thank you for the feedback. I am glad I was able to help.
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