[Feature]: MultiSelect ComboBox

[ghost]

Purpose

To introduce a new control to Orc's Control Ecosystem called a MultiSelect ComboBox. As shown below it can be either one of these variations (or both).

Feature description

The premise of this feature is to introduce the supported concept of multiple item selection to a ComboBox. This would allow the implementer to leverage support for multi-value collections (such as a collection of strings, integers and so forth) in an easy to use form.

At a high-level the API for the control would have the following exposed properties:

Property Name	Property Type	Binding Mode
ItemsSource	IEnumerable	Two-Way
SelectedItems	IEnumerable	Two-Way
DisplayMemberPath	string	One-Way to Source
SelectedValueMemberPath	string	One Way to Source

DisplayMemberPath and SelectedValueMemberPath are leveraged properties for when the underlying ItemsSource type is of either IDictionary<TKey, TValue> or IEnumerable<KeyValuePair<TKey, TValue>> or a collection composing of business objects rather than primitive types.

Conjecture

If DisplayMemberPath is not defined then the ToString() method of the underlying type is called.

If SelectValueMemberPath is not defined, then the underlying type is used.

Final Notes

This is all preliminary and it is possible that feature development may be accelerated using some of the foundation of the ColorLegend control. I am willing to take ownership of this feature development once my time allows. The request for the feature is not due to a needed business requirement but rather a desire to contribute to the library.

[GeertvanHorrik]

Sounds like a great control to have. The mock-ups show it as a window, but I think we can implement this as a separate control (without the buttons) so it can be used anywhere?

Pinging @ceo1647 / @mkhomutov , in case you are interested in helping out with the development as well.

[ghost]

My apologies if the mock ups make it seem like it’s a window. It is actually not a window. The button row is part of the listbox drop down. The design is intentional to prevent closure of the dropdown upon checking an item or moving off focus by requiring the user to click OK to commit changes or Cancel to roll back.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.