Hi,
I'm trying to limit the number of fields the grid can be grouped by. I'm handling the Grouping event and cancelling the event if the number of groups exceed the limit. But I'd like to have some kind of mouse/drop indicator or tooltip to indicate the max number of fields is reached. I'm using the GroupByAreaMulti. Is there a way to display a tooltip and only display the tooltip based on some condition?
Thanks,
Harold
Hello Harold,
In order to display an indication to the user that the XamDataGrid cannot be grouped by a certain field if the total Fields' count exceeds a specific number, I can suggest you create a MultiDataTrigger with conditions for the FieldLabelDragInProgress property of the GroupByAreaMulti and whenever it is True, we can use setters to set the Prompt2 and the Background properties of the element. The Fields' count check can be done with a Condition instance as well by using a converter in code-behind.
<MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding Path=FieldLabelDragInProgress, RelativeSource={RelativeSource Self}}" Value="True" /> <Condition Binding="{Binding RelativeSource={RelativeSource AncestorType=igDP:XamDataGrid}, Converter={StaticResource converter}}" Value="True" /> </MultiDataTrigger.Conditions> <Setter Property="Prompt2" Value="Fields count exceeded, cannot group!" /> <Setter Property="Background" Value="Red" /></MultiDataTrigger>
<Setter Property="Prompt2" Value="Fields count exceeded, cannot group!" /> <Setter Property="Background" Value="Red" /></MultiDataTrigger>
Please note that the Cursor of the XamDataGrid (not the one of the GroupByAreaMulti element) takes precedence when a field is being dragged and setting the Cursor of the GroupByAreaMulti will be pointless. You can always set the Cursor of the XamDataGrid in the converter, but this will require additional logic for reverting the Cursor when necessary.
I have attached a sample application that demonstrates the initial approach from above.
If you have any questions, please let me know.
Hi Stefan,
Is there anyway to at least change the drop indicator so that the user knows the field cannot be dropped into the group by area?
Hello Harold,After working on Tooltip for GroupByAreaMulti and doing some research, it has been determined to be a new product idea. You can suggest new product ideas for future versions (or vote for existing ones) at http://ideas.infragistics.com.
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