InputBox

[jfoshee]

Would an InputBox be a desirable addition? I was looking for one myself.

Here is a start, largely derived from UICatalog TableEditor.EditCurrentCell.

public static class InputBox
{
    public static string? Show(string prompt, string? title, string? defaultValue)
    {
        bool okPressed = false;

        var ok = new Button("Ok", is_default: true);
        ok.Clicked += () => { okPressed = true; Application.RequestStop(); };
        var cancel = new Button("Cancel");
        cancel.Clicked += () => { Application.RequestStop(); };
        var dialog = new Dialog(title, ok, cancel);

        var label = new Label(prompt)
        {
            X = 0,
            Y = 1
        };

        var textField = new TextField(defaultValue ?? "")
        {
            X = 0,
            Y = 2,
            Width = Dim.Fill()
        };

        dialog.Add(label, textField);
        textField.SetFocus();

        Application.Run(dialog);

        if (okPressed)
        {
            return textField.Text.ToString();
        }
        return null;
    }
}

[tig]

Nice idea.

I wonder if this could be more generic though, and support any View that has a Text property?

var tree = new TreeView() { ... };
...
var result = InputBox.Query("Select from Tree", tree);

MessageBox.Query("You selected..", result);

// Above is same as:
MessageBox.Query("You selected..", tree.Text);

(I think the Label is superfluous given the Dialog has a Title).

[tznind]

I think a basic InputBox would be nice to have, it is handy and would lower the bar of entry. Given we have MessageBox and OpenDialog it makes sense to have an easy way of getting input from user too.

I think that we should support (optional) Label text. The traditional input box supports both title and label and they have different roles.

• Title gives the user context for what is expected
• Label gives detail on what they are supposed to enter. This text could get quite long and may even require wrapping.

https://learn.microsoft.com/en-us/office/vba/language/reference/user-interface-help/inputbox-function

https://www.w3schools.com/js/js_popup.asp

I love the idea of making it slottable. Building on that idea, I think we should start with only public static method signature that matches other libraries (e.g. VB / Javascript). We can keep the 'slottable' backend private until we are sure the code design is finalised and then make public if there is benefit from it.

Something like this:

public class InputBox<T> : Dialog
{
    private readonly Func<T> getter;

    public T Result { get
        {
            return getter();
        }
    }

    private InputBox(string title, string prompt, T defaultValue, View hosted, Func<T> getter)
    {
        this.getter = getter;
        // TODO setup rest of view
    }

    public static string QueryString(string title, string prompt, string defaultValue)
    {
        var tf = new TextField();
        var getter = ()=>tf.Text.ToString();
        var box = new InputBox<string>(title, prompt, defaultValue, tf, getter);
        Application.Run(box);
        return box.Result;

    }
    public static DateTime QueryDate(string title, string prompt, DateTime defaultValue)
    {
        var df = new DateField();
        var getter = () => df.Date;
        var box = new InputBox<DateTime>(title, prompt, defaultValue, df, getter);
        Application.Run(box);
        return box.Result;
    }
}