EditEntryForm.cs

using System;
using Eto.Drawing;
using Eto.Forms;

namespace devtime
{
    public class EditEntryForm : Dialog<bool>
    {
        public long LoggedTime { get; private set; }

        private readonly NumericStepper _hoursStepper;
        private readonly NumericStepper _minutesStepper;
        private readonly NumericStepper _secondsStepper;
        private readonly NumericStepper _msStepper;

        public EditEntryForm(long currentLoggedTime)
        {
            Title = "Edit entry";
            Icon = IconLoader.LoadIcon("edit-time.png");
            Resizable = false;

            long h = currentLoggedTime / 3600000;
            currentLoggedTime %= 3600000;

            long m = currentLoggedTime / 60000;
            currentLoggedTime %= 60000;

            long s = currentLoggedTime / 1000;
            currentLoggedTime %= 1000;

            long ms = currentLoggedTime;

            _hoursStepper = new NumericStepper { MinValue = 0, MaxValue = 24, Value = h, DecimalPlaces = 0, Width = 80 };
            _minutesStepper = new NumericStepper { MinValue = 0, MaxValue = 59, Value = m, DecimalPlaces = 0, Width = 80 };
            _secondsStepper = new NumericStepper { MinValue = 0, MaxValue = 59, Value = s, DecimalPlaces = 0, Width = 80 };
            _msStepper = new NumericStepper { MinValue = 0, MaxValue = 999, Value = ms, DecimalPlaces = 0, Width = 80 };

            var okButton = new Button { Text = "OK", Width = 70, Height = 23 };
            okButton.Click += (sender, e) => OkClick();

            var cancelButton = new Button { Text = "Cancel", Width = 70, Height = 23 };
            cancelButton.Click += (sender, e) => Close(false);

            DefaultButton = okButton;
            AbortButton = cancelButton;

            var grid = new TableLayout
            {
                Spacing = new Size(5, 3),
                Padding = new Padding(10, 5, 10, 3),
                Rows =
                {
                    new TableRow(new Label { Text = "Hours (0-24):" }, _hoursStepper),
                    new TableRow(new Label { Text = "Minutes (0-59):" }, _minutesStepper),
                    new TableRow(new Label { Text = "Seconds (0-59):" }, _secondsStepper),
                    new TableRow(new Label { Text = "Milliseconds:" }, _msStepper)
                }
            };

            var buttonLayout = new StackLayout
            {
                Orientation = Orientation.Horizontal,
                Spacing = 5,
                Items = { okButton, cancelButton }
            };

            Content = new StackLayout
            {
                HorizontalContentAlignment = HorizontalAlignment.Stretch,
                Items =
                {
                    grid,
                    new StackLayout { Padding = new Padding(10, 0, 10, 5), HorizontalContentAlignment = HorizontalAlignment.Right, Items = { buttonLayout } }
                }
            };
        }

        private void OkClick()
        {
            int h = (int)_hoursStepper.Value;
            int m = (int)_minutesStepper.Value;
            int s = (int)_secondsStepper.Value;
            int ms = (int)_msStepper.Value;

            if (h == 24 && (m > 0 || s > 0 || ms > 0))
            {
                MessageBox.Show(this, "Logged time is invalid (24 hours are logged; all other inputs must be 0).", "devtime error", MessageBoxButtons.OK, MessageBoxType.Error);
                return;
            }

            LoggedTime = ms + (s * 1000L) + (m * 60000L) + (h * 3600000L);
            Close(true);
        }
    }
}