LogWorkForm.cs

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

namespace devtime
{
 public class LogWorkForm : Dialog<bool>
 {
 public string Log { get; private set; } = "";
 private readonly TextArea _textArea;

 public LogWorkForm(string initialLog, string when)
 {
 Title = "Log work";
 Icon = IconLoader.LoadIcon("log.png");
 MinimumSize = new Size(268, 190);
 Resizable = true;

 _textArea = new TextArea { Text = initialLog, AcceptsTab = true, AcceptsReturn = true, Width = 232, Height = 115 };

 string suffix;
 if (DateTime.TryParseExact(when, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime date))
 {
 if (date == DateTime.Today)
 {
 suffix = "today";
 }
 else if (date == DateTime.Today.AddDays(-1))
 {
 suffix = "yesterday";
 }
 else if (date == DateTime.Today.AddDays(1))
 {
 suffix = "tomorrow";
 }
 else
 {
 suffix = "on " + when;
 }
 }
 else
 {
 suffix = "on " + when;
 }

 var group = new GroupBox { Text = $"What did you do {suffix}?" };
 group.Content = _textArea;

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

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

 DefaultButton = okButton;
 AbortButton = cancelButton;

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

 Content = new TableLayout
 {
 Padding = new Padding(5),
 Spacing = new Size(3, 3),
 Rows =
 {
 new TableRow(new TableCell(group, true)) { ScaleHeight = true },
 new TableRow(new StackLayout { HorizontalContentAlignment = HorizontalAlignment.Right, Items = { buttonLayout } })
 }
 };
 }

 private void OkClick()
 {
 Log = _textArea.Text ?? "";
 Close(true);
 }
 }
}