private EditAction(EditActionType actionType, EditActionParameters parameters)
{
_actionType = actionType;
_parameters = parameters;
}
public EditAction(EditActionType actionType, EditActionParameters parameters, out EditAction inverseAction)
{
_actionType = actionType;
_parameters = parameters;
EditActionParameters invertedParameters = new EditActionParameters();
inverseAction = null;
if (actionType == EditActionType.SetNodePosition)
{
invertedParameters.PatchIndex = parameters.PatchIndex;
invertedParameters.NodeIndex = parameters.NodeIndex;
ICoordinate oldPosition = null;
if (_parameters.OldGeometry is Polyline)
oldPosition = (ICoordinate)(_parameters.OldGeometry as Polyline).Paths[parameters.PatchIndex].Vertices[_parameters.NodeIndex].Clone();
if (_parameters.OldGeometry is Polygon)
oldPosition = (ICoordinate)(_parameters.OldGeometry as Polygon).Contours[parameters.PatchIndex].Vertices[_parameters.NodeIndex].Clone();
invertedParameters.NodePosition = oldPosition;
}
else if (actionType == EditActionType.InsertNode)
{
invertedParameters.PatchIndex = parameters.PatchIndex;
invertedParameters.NodeIndex = parameters.NodeIndex;
}
else if (actionType == EditActionType.DeleteNode)
{
invertedParameters.PatchIndex = parameters.PatchIndex;
invertedParameters.NodeIndex = parameters.NodeIndex;
ICoordinate oldPosition = null;
if (_parameters.OldGeometry is Polyline)
oldPosition = (ICoordinate)(_parameters.OldGeometry as Polyline).Paths[parameters.PatchIndex].Vertices[_parameters.NodeIndex].Clone();
if (_parameters.OldGeometry is Polygon)
oldPosition = (ICoordinate)(_parameters.OldGeometry as Polygon).Contours[parameters.PatchIndex].Vertices[_parameters.NodeIndex].Clone();
invertedParameters.NodePosition = oldPosition;
}
else if (actionType == EditActionType.InsertPatch)
{
invertedParameters.PatchIndex = parameters.PatchIndex;
}
else if (actionType == EditActionType.DeletePatch)
{
invertedParameters.PatchIndex = parameters.PatchIndex;
List<ICoordinate> patchCoordinates = new List<ICoordinate>();
if (_parameters.OldGeometry is Polyline)
foreach (ICoordinate c in (_parameters.OldGeometry as Polyline).Paths[parameters.PatchIndex].Vertices)
patchCoordinates.Add((ICoordinate)c.Clone());
if (_parameters.OldGeometry is Polygon)
foreach (ICoordinate c in (_parameters.OldGeometry as Polygon).Contours[parameters.PatchIndex].Vertices)
patchCoordinates.Add((ICoordinate)c.Clone());
invertedParameters.PatchCoordinates = patchCoordinates;
}
else if (actionType == EditActionType.ReplaceGeometry)
{
invertedParameters.NewGeometry = parameters.OldGeometry;
}
_parameters.OldGeometry = null;
inverseAction = new EditAction(getInvertedAction(actionType), invertedParameters);
}
private void removeNodeAt(int patchIndex, int coordinateIndex)
{
EditAction forwardAction;
EditAction backwardAction;
EditActionParameters parameters = new EditActionParameters()
{
OldGeometry = _geometry,
PatchIndex = patchIndex,
NodeIndex = coordinateIndex,
};
forwardAction = new EditAction(EditActionType.DeleteNode, parameters, out backwardAction);
HistoryEntry pair = new HistoryEntry(forwardAction, backwardAction);
_geometry = _history.DoAction(pair, _geometry);
}
private void insertNodeAt(int patchIndex, int coordinateIndex, ICoordinate coordinate)
{
EditAction forwardAction;
EditAction backwardAction;
EditActionParameters parameters = new EditActionParameters()
{
OldGeometry = _geometry,
PatchIndex = patchIndex,
NodeIndex = coordinateIndex,
NodePosition = (ICoordinate)coordinate.Clone()
};
forwardAction = new EditAction(EditActionType.InsertNode, parameters, out backwardAction);
HistoryEntry pair = new HistoryEntry(forwardAction, backwardAction);
_geometry = _history.DoAction(pair, _geometry);
}
/// <summary>
/// Replaces currently editing geometry with the other one.
/// </summary>
/// <param name="newGeometry">A new instance of IGeometry</param>
public void ReplaceGeometry(IGeometry newGeometry)
{
if (newGeometry == null || newGeometry is Polygon || newGeometry is Polyline)
{
EditAction forwardAction;
EditAction backwardAction;
EditActionParameters parameters = new EditActionParameters()
{
OldGeometry = _geometry,
NewGeometry = newGeometry
};
forwardAction = new EditAction(EditActionType.ReplaceGeometry, parameters, out backwardAction);
HistoryEntry pair = new HistoryEntry(forwardAction, backwardAction);
_geometry = _history.DoAction(pair, _geometry);
//_geometry = newGeometry;
ActiveNodeNumber = -1;
}
else
throw new InvalidCastException("Allows only Polygons and Polylines");
}
/// <summary>
/// Inserts a new coordinate patch into the editing geometry.
/// </summary>
/// <param name="patchIndex">A zero-based index of patch</param>
/// <param name="coordinates">A coordinates of inserted patch</param>
public void InsertPatch(int patchIndex, IEnumerable<ICoordinate> coordinates)
{
if (_geometry is Polygon)
if ((_geometry as Polygon).Contours.Count < patchIndex)
throw new ArgumentOutOfRangeException("Patch index exceeds the number of patches", "patchIndex");
if (_geometry is Polyline)
if ((_geometry as Polyline).Paths.Count < patchIndex)
throw new ArgumentOutOfRangeException("Patch index exceeds the number of patches", "patchIndex");
EditAction forwardAction;
EditAction backwardAction;
EditActionParameters parameters = new EditActionParameters()
{
OldGeometry = _geometry,
PatchIndex = patchIndex,
PatchCoordinates = coordinates
};
forwardAction = new EditAction(EditActionType.InsertPatch, parameters, out backwardAction);
HistoryEntry pair = new HistoryEntry(forwardAction, backwardAction);
_geometry = _history.DoAction(pair, _geometry);
_activePatchIndex = -1;
_activeCoordinateIndex = -1;
}
/// <summary>
/// Updates the position of the active node with the specified value
/// </summary>
/// <param name="coordinate">New position of the active node</param>
/// <param name="commitIntoUndoList">A value indicating whether current update should be commited into undo list</param>
/// <returns>true if the position has been updated, false otherwise</returns>
public bool UpdateActiveNodePosition(ICoordinate coordinate, bool commitIntoUndoList)
{
if (ActivePatchIndex == -1)
return false;
if (commitIntoUndoList)
{
EditAction forwardAction;
EditAction backwardAction;
EditActionParameters parameters = new EditActionParameters()
{
OldGeometry = _geometry,
PatchIndex = _activePatchIndex,
NodeIndex = _activeCoordinateIndex,
NodePosition = (ICoordinate)coordinate.Clone()
};
// update active node with the old value
// this is necessary for properly generation of the inverse action
UpdateActiveNodePosition(oldActiveNodeCoordinate, false);
forwardAction = new EditAction(EditActionType.SetNodePosition, parameters, out backwardAction);
HistoryEntry pair = new HistoryEntry(forwardAction, backwardAction);
_geometry = _history.DoAction(pair, _geometry);
oldActiveNodeCoordinate = (ICoordinate)coordinate.Clone();
}
else
{
if (_snapper != null && _snapper.SnapMethod != null)
coordinate = _snapper.SnapMethod(coordinate);
if (_geometry is Polyline)
{
Polyline polyline = (Polyline)_geometry;
polyline.Paths[_activePatchIndex].Vertices[_activeCoordinateIndex].X = coordinate.X;
polyline.Paths[_activePatchIndex].Vertices[_activeCoordinateIndex].Y = coordinate.Y;
}
if (_geometry is Polygon)
{
Polygon polygon = (Polygon)_geometry;
polygon.Contours[_activePatchIndex].Vertices[_activeCoordinateIndex].X = coordinate.X;
polygon.Contours[_activePatchIndex].Vertices[_activeCoordinateIndex].Y = coordinate.Y;
}
}
return true;
}
