/// <summary>
/// Runs a deletion command by creating the editing operation (using the current feature
/// selection) & executing it. The controller is then told to clear the selection before
/// completing the command.
/// </summary>
/// <returns>True if the command ran to completion. False if any exception arose (in that
/// case, the controller would be told to abort the command).</returns>
internal override bool Run()
{
EditingController c = Controller;
DeletionOperation dop = null;
try
{
SetCommandCursor();
dop = new DeletionOperation();
foreach (ISpatialObject so in c.SpatialSelection.Items)
{
if (so is Feature)
{
dop.AddDeletion(so as Feature);
}
}
dop.Execute();
c.ClearSelection();
c.FinishCommand(this);
return(true);
}
catch (Exception e)
{
MessageBox.Show(e.StackTrace, e.Message);
c.AbortCommand(this);
return(false);
}
}
/// <summary>
/// Undoes the last edit.
/// </summary>
/// <returns>True if the command ran to completion. False if there was nothing to
/// undo in the current editing session, or an exception arose.</returns>
internal override bool Run()
{
EditingController c = Controller;
try
{
// Turn off any highlighted features (confusing if the feature is undone by the rollback).
c.ClearSelection();
// Ask the map to rollback the last operation (restricting
// to the current editing session).
Session s = CadastralMapModel.Current.WorkingSession;
if (CadastralMapModel.Current.Rollback(s))
{
c.FinishCommand(this);
return(true);
}
MessageBox.Show("Nothing to undo from current session.");
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
c.AbortCommand(this);
return(false);
}
/// <summary>
/// Runs a trim dangles command by creating the editing operation (using the current feature
/// selection) & executing it. The controller is then told to clear the selection before
/// completing the command.
/// </summary>
/// <returns>True if the command ran to completion. False if any exception arose (in that
/// case, the controller would be told to abort the command).</returns>
internal override bool Run()
{
// Grab the current selection & filter out stuff that can't be trimmed
EditingController c = Controller;
ISpatialSelection ss = c.SpatialSelection;
LineFeature[] lines = TrimLineOperation.PreCheck(ss.Items);
if (lines.Length == 0)
{
StringBuilder sb = new StringBuilder(200);
sb.Append("Nothing can be trimmed. Possible reasons:");
sb.Append(System.Environment.NewLine);
sb.Append(System.Environment.NewLine);
sb.Append("1. Lines have to be dangling.");
sb.Append(System.Environment.NewLine);
sb.Append("2. Only lines that are polygon boundaries can be trimmed.");
sb.Append(System.Environment.NewLine);
sb.Append("3. There has to be something left after trimming a line.");
MessageBox.Show(sb.ToString());
c.AbortCommand(this);
return(false);
}
TrimLineOperation op = null;
try
{
op = new TrimLineOperation();
op.Execute(lines);
c.ClearSelection();
c.FinishCommand(this);
return(true);
}
catch (Exception e)
{
MessageBox.Show(e.StackTrace, e.Message);
c.AbortCommand(this);
return(false);
}
}
/// <summary>
/// Starts the user interface (if any) for this command. This will change the
/// topological status of the line that was passed to the constructor, then
/// complete the command.
/// </summary>
/// <returns>True if command started (and completed) ok.</returns>
internal override bool Run()
{
EditingController c = Controller;
SetTopologyOperation op = null;
try
{
op = new SetTopologyOperation(m_Line);
op.Execute();
c.ClearSelection();
c.FinishCommand(this);
return(true);
}
catch (Exception e)
{
c.AbortCommand(this);
MessageBox.Show(e.StackTrace, e.Message);
}
return(false);
}