Spinner

What it is for

A drop-in replacement for DomainUpDown, for a short, ordered set of choices such as a shipping method, a priority or a size, where a drop-down list would be heavier than the choice deserves. Everything the standard control does – Items, wrapping, sorting, typing to select, keyboard and accessibility – works unchanged. What it adds is the look: a flat border that lights up in BorderColor, and spin buttons drawn in three states – resting, hot (under the pointer or holding the focus) and pressed.

Appearance

• DrawStyleIsFlat switches the flat drawing on (the default) or off, giving back the standard 3D look.
• ShowBorderAlways keeps the border and the buttons in their hot colours at all times (the default). Set it to false for the classic hover effect, where the control rests borderless and lights up under the pointer or with the focus.
• UpDownButtonNormalBackColor, UpDownButtonOnFocusBackColor and UpDownArrowPressedBackColor colour the buttons in the three states, and UpDownArrowsColor the arrows.

The button colours follow the Windows colour scheme until they are set. The spin buttons widen with the font, so a large font or a high display scale keeps them in proportion to the text.

A shipping-method picker that cannot be typed into, and shows the delivery estimate for the choice.

using System.Drawing;
using System.Windows.Forms;
using Binarymission.WinForms.Controls.InputControls;

var estimate = new Label { Location = new Point(190, 19), AutoSize = true };

var shipping = new BinaryDomainUpDown
{
    Location = new Point(16, 16),
    Width = 160,
    ReadOnly = true,
    Wrap = true,
    BorderColor = Color.SeaGreen,
    UpDownButtonOnFocusBackColor = Color.Honeydew,
    UpDownArrowsColor = Color.DarkGreen
};

shipping.Items.AddRange(new object[] { "Standard", "Express", "Next working day" });
shipping.SelectedIndex = 0;
shipping.SelectedItemChanged += (sender, e) =>
    estimate.Text = shipping.SelectedIndex == 0 ? "3-5 days" : shipping.SelectedIndex == 1 ? "2 days" : "Tomorrow";

checkoutForm.Controls.Add(shipping);
checkoutForm.Controls.Add(estimate);