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using System;
using System.Windows.Controls;
using Pfz.DataTypes;
namespace Pfz.WpfControls
{
/// <summary>
/// Control used to represent a date.
/// In .Net 4.0 a real calendar will be used.
/// </summary>
public class DateControl:
UserControl,
IValueControl,
IValueContainer<Date>,
IValueContainer<Date?>
{
private TextBox fTextYear;
private ComboBox fComboMonth;
private ComboBox fComboDay;
/// <summary>
/// Creates a new instance of the DateControl.
/// </summary>
public DateControl()
{
var textYear = new TextBox();
textYear.Width = 50;
textYear.TextChanged += (a, b) => p_RecreateDays();
fTextYear = textYear;
var comboMonth = new ComboBox();
comboMonth.Width = 50;
comboMonth.Items.Add("");
comboMonth.SelectionChanged += (a , b) => p_RecreateDays();
for(int i=1; i<=12; i++)
comboMonth.Items.Add(i);
fComboMonth = comboMonth;
var comboDay = new ComboBox();
comboDay.Width = 50;
comboDay.Items.Add("");
for(int i=1; i<=28; i++)
comboDay.Items.Add(i);
fComboDay = comboDay;
var stackPanel = new StackPanel();
stackPanel.Orientation = Orientation.Horizontal;
stackPanel.Children.Add(textYear);
stackPanel.Children.Add(comboMonth);
stackPanel.Children.Add(comboDay);
Content = stackPanel;
}
private void p_RecreateDays()
{
string text = fTextYear.Text;
if (string.IsNullOrEmpty(text))
return;
int year;
if (!int.TryParse(text, out year))
return;
if (year < 1 || year > 9999)
return;
int month = fComboMonth.SelectedIndex;
if (month < 1)
return;
int dayCount = DateTime.DaysInMonth(year, month);
int comboCount = fComboDay.Items.Count - 1;
for(int i=comboCount; i>dayCount; i--)
fComboDay.Items.RemoveAt(i);
for(int i=comboCount+1; i<=dayCount; i++)
fComboDay.Items.Add(i);
}
/// <summary>
/// Gets or sets the value as a nullable Date.
/// </summary>
public Date? Value
{
get
{
int day = fComboDay.SelectedIndex;
int month = fComboMonth.SelectedIndex;
int year;
if (day < 1 || month < 1 || !int.TryParse(fTextYear.Text, out year))
return null;
return new Date(year, month, day);
}
set
{
if (value.HasValue)
{
Date date = value.Value;
fTextYear.Text = date.Year.ToString();
fComboMonth.SelectedIndex = date.Month;
fComboDay.SelectedIndex = date.Day;
}
else
{
fTextYear.Clear();
fComboMonth.SelectedIndex = 0;
fComboDay.SelectedIndex = 0;
}
}
}
#region IValueContainer<Date> Members
Date IValueContainer<Date>.Value
{
get
{
return (Date)Value;
}
set
{
Value = value;
}
}
#endregion
#region IValueContainer Members
object IValueContainer.Value
{
get
{
return Value;
}
set
{
Value = (Date?)value;
}
}
#endregion
#region IReadOnlyMakeable Members
/// <summary>
/// Clears all the text-boxes.
/// </summary>
public void Clear()
{
fTextYear.Clear();
fComboMonth.SelectedIndex = 0;
fComboDay.SelectedIndex = 0;
}
/// <summary>
/// Gets or sets a value indicating that the text-boxes are/should be
/// read-only.
/// </summary>
public bool IsReadOnly
{
get
{
return !IsEnabled;
}
set
{
IsEnabled = !value;
}
}
#endregion
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).