/// <summary>
/// Constructor to extend the currently selected line.
/// </summary>
/// <param name="cc">The container for any dialogs</param>
/// <param name="action">The action that initiated this command</param>
/// <exception cref="InvalidOperationException">If a line is not currently selected</exception>
internal LineExtensionUI(IControlContainer cc, IUserAction action)
: base(cc, action)
{
LineFeature line = EditingController.SelectedLine;
if (line == null)
throw new InvalidOperationException("You must initially select the line you want to extend.");
// The dialog will be created by Run().
m_Dialog = null;
// Remember the line that is being extended.
m_ExtendLine = line;
// And initialize the parameters for the operation's Execute() call.
m_Length = null;
m_IsExtendFromEnd = true;
m_LineType = null;
}
/// <summary>
/// Constructor for doing an update.
/// </summary>
/// <param name="editId">The ID of the edit this command deals with.</param>
/// <param name="updcmd">The update command.</param>
internal LineExtensionUI(IControlContainer cc, EditingActionId editId, UpdateUI updcmd)
: base(cc, editId, updcmd)
{
// The dialog will be created by Run().
m_Dialog = null;
// The line we extended is known via the update.
m_ExtendLine = null;
// And initialize the parameters for the operation's Execute() call.
m_Length = null;
m_IsExtendFromEnd = true;
m_LineType = null;
}
/// <summary>
/// Starts the user interface (if any) for this command.
/// </summary>
/// <returns>True if command started ok.</returns>
internal override bool Run()
{
// Don't run more than once.
if (m_Dialog!=null)
throw new InvalidOperationException("LineExtensionUI.Run - Command is already running.");
// Are we doing an update?
UpdateUI pup = this.Update;
if (pup!=null)
m_Dialog = new LineExtensionControl(pup);
else
m_Dialog = new LineExtensionControl(this, m_ExtendLine, this.Recall);
this.Container.Display(m_Dialog);
return true;
}
/// <summary>
/// Destroys any dialogs that are currently displayed.
/// </summary>
void KillDialogs()
{
this.Container.Clear();
if (m_Dialog!=null)
{
m_Dialog.Dispose();
m_Dialog = null;
}
}
public override void Dispose()
{
base.Dispose(); // removes any controls from container
if (m_Dialog!=null)
{
m_Dialog.Dispose();
m_Dialog = null;
}
}
