private T GetCheckboxedValue()
{
// this is kind of a cheat. it uses the type converter after building a string with each check box item.
StringBuilder sb = new StringBuilder();
for (int i = 0; i < clbFlags.Items.Count; i++)
{
if (clbFlags.GetItemChecked(i))
{
if (sb.Length == 0)
{
sb.Append(clbFlags.Items[i].ToString());
}
else
{
sb.AppendFormat(",{0}", clbFlags.Items[i]);
}
}
}
if (sb.Length == 0)
{
sb.AppendFormat("{0}", EnumTypeConverter <T> .GetNameForEmptyValue());
}
return((T)m_converter.ConvertFrom(sb.ToString()));
}
private void clbFlags_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (m_settingChecked)
{
m_settingChecked = false;
return;
}
// check the Zero value when others are unchecked
// or uncheck the zero value when others are checked
string name = EnumTypeConverter <T> .GetNameForEmptyValue();
if (name != null)
{
int index = clbFlags.Items.IndexOf(EnumTypeConverter <T> .GetNameForEmptyValue());
if (e.Index == index && e.NewValue == CheckState.Checked)
{
for (int i = 0; i < clbFlags.Items.Count; i++)
{
if (i != index)
{
m_settingChecked = true;
clbFlags.SetItemChecked(i, false);
}
}
}
else if (e.Index != index && e.NewValue == CheckState.Checked)
{
m_settingChecked = true;
clbFlags.SetItemChecked(index, false);
}
}
m_settingChecked = false;
}
private void SetCheckboxes(T value)
{
string name = EnumTypeConverter <T> .GetNameForEmptyValue();
int index = clbFlags.Items.IndexOf(name);
ulong val = Convert.ToUInt64(value, CultureInfo.InvariantCulture);
if (val == 0)
{
for (int i = 0; i < clbFlags.Items.Count; i++)
{
m_settingChecked = true;
clbFlags.SetItemChecked(i, i == index);
}
}
else
{
for (int i = 0; i < clbFlags.Items.Count; i++)
{
string currentItemName = clbFlags.Items[i].ToString();
ulong nameValue = Convert.ToUInt64((T)m_converter.ConvertFrom(currentItemName), CultureInfo.InvariantCulture);
m_settingChecked = true;
if ((nameValue & val) != 0)
{
clbFlags.SetItemChecked(i, true);
}
else
{
clbFlags.SetItemChecked(i, false);
}
}
}
m_settingChecked = false;
}