/// <summary>
/// Load an ID combo box with all the available IDs for a specific entity type.
/// </summary>
/// <param name="box">The combo box (not null)</param>
/// <param name="ent">The entity type that the combo is for (if null, the combo will
/// be empty)</param>
/// <param name="handle">The ID handle that should be defined to correspond with the
/// first available ID (may be null). If there are no available IDs for the specified
/// entity type, any ID previously reserved will be released.</param>
/// <returns>The number of IDs that were loaded into the combo (if any)</returns>
internal static int LoadIdCombo(ComboBox box, IEntity ent, IdHandle handle)
{
if (box==null)
throw new ArgumentNullException();
// Clear out anything that was in the combo before.
box.Items.Clear();
if (ent==null)
return 0;
// Get a list of all the available IDs for the specified entity type...
IdManager idMan = CadastralMapModel.Current.IdManager;
if (idMan == null)
return 0;
IdGroup group = idMan.GetGroup(ent);
if (group==null)
return 0;
// Get the available IDs for the group
uint[] avail = group.GetAvailIds();
// If we didn't find any, obtain an extra allocation
if (avail.Length == 0)
{
IdPacket newPacket = group.GetAllocation(true); // with announcement
avail = group.GetAvailIds();
if (avail.Length == 0)
throw new ApplicationException("Cannot obtain ID allocation");
}
// Load the combo
DisplayId[] ids = new DisplayId[avail.Length];
for (int i = 0; i < ids.Length; i++)
ids[i] = new DisplayId(group, avail[i]);
box.Items.AddRange(ids);
// Reserve the first available ID if a handle was supplied (and select it)
if (handle != null)
{
IdPacket p = group.FindPacket(avail[0]);
handle.ReserveId(p, ent, avail[0]);
box.SelectedItem = ids[0];
}
return avail.Length;
}
/// <summary>
/// Load an ID combo box with all the available IDs for a specific entity type.
/// </summary>
/// <param name="box">The combo box (not null)</param>
/// <param name="ent">The entity type that the combo is for (if null, the combo will
/// be empty)</param>
/// <param name="handle">The ID handle that should be defined to correspond with the
/// first available ID (may be null). If there are no available IDs for the specified
/// entity type, any ID previously reserved will be released.</param>
/// <returns>The number of IDs that were loaded into the combo (if any)</returns>
internal static int LoadIdCombo(ComboBox box, IEntity ent, IdHandle handle)
{
if (box == null)
{
throw new ArgumentNullException();
}
// Clear out anything that was in the combo before.
box.Items.Clear();
if (ent == null)
{
return(0);
}
// Get a list of all the available IDs for the specified entity type...
IdManager idMan = CadastralMapModel.Current.IdManager;
if (idMan == null)
{
return(0);
}
IdGroup group = idMan.GetGroup(ent);
if (group == null)
{
return(0);
}
// Get the available IDs for the group
uint[] avail = group.GetAvailIds();
// If we didn't find any, obtain an extra allocation
if (avail.Length == 0)
{
IdPacket newPacket = group.GetAllocation(true); // with announcement
avail = group.GetAvailIds();
if (avail.Length == 0)
{
throw new ApplicationException("Cannot obtain ID allocation");
}
}
// Load the combo
DisplayId[] ids = new DisplayId[avail.Length];
for (int i = 0; i < ids.Length; i++)
{
ids[i] = new DisplayId(group, avail[i]);
}
box.Items.AddRange(ids);
// Reserve the first available ID if a handle was supplied (and select it)
if (handle != null)
{
IdPacket p = group.FindPacket(avail[0]);
handle.ReserveId(p, ent, avail[0]);
box.SelectedItem = ids[0];
}
return(avail.Length);
}
/// <summary>
/// Handles a selection change made to an ID combo. This reserves the ID
/// by associating it with the supplied ID handle (and discards any previous
/// reserve).
/// </summary>
/// <param name="comboBox">The combo box where the selection has changed.</param>
/// <param name="handle">The handle for the selected ID</param>
internal static void OnChangeSelectedId(ComboBox comboBox, IdHandle handle)
{
DisplayId id = (DisplayId)comboBox.SelectedItem;
handle.ReserveId(handle.Entity, id.RawId);
}