public FlagCheckedListBoxItem Add(FlagCheckedListBoxItem item)
{
Items.Add(item);
return item;
}
// Returns true if this value is a member of the composite bit value
public bool IsMemberFlag(FlagCheckedListBoxItem composite)
{
return (this.IsFlag && ((this.value & composite.value) == this.value));
}
// Adds an integer value and its associated description
public FlagCheckedListBoxItem Add(int v, string c)
{
var item = new FlagCheckedListBoxItem(v, c);
Items.Add(item);
return item;
}
// Updates items in the checklistbox
// composite = The item that was checked/unchecked
// cs = The check state of that item
protected void UpdateCheckedItems(FlagCheckedListBoxItem composite, CheckState cs)
{
// If the value of the item is 0, call directly.
if (composite.value == 0)
this.UpdateCheckedItems(0);
// Get the total value of all checked items
int sum = 0;
for (int i = 0; i < Items.Count; i++)
{
var item = Items[i] as FlagCheckedListBoxItem;
// If item is checked, add its value to the sum.
if (GetItemChecked(i))
sum |= item.value;
}
// If the item has been unchecked, remove its bits from the sum
if (cs == CheckState.Unchecked)
sum = sum & (~composite.value);
// If the item has been checked, combine its bits with the sum
else
sum |= composite.value;
// Update all items in the checklistbox based on the final bit value
this.UpdateCheckedItems(sum);
}
