public override void Redo(MapObjects list) { // Delete from list all objects kept in cloneList int n = list.Count; for (int i = n - 1; i >= 0; i--) { bool toDelete = false; DrawObject objectToDelete = list[i]; foreach (DrawObject o in cloneList) { if (objectToDelete.GetProperty().ID == o.GetProperty().ID) { toDelete = true; break; } } if (toDelete) { list.RemoveAt(i); } } }
public override void Undo(MapObjects list) { // Add all objects from clone list to list - // opposite to DeleteAll foreach (DrawObject o in cloneList) { list.Add(o); } }
// Fill list from selection private void FillList(MapObjects graphicsList, ref List <DrawObject> listToFill) { listToFill = new List <DrawObject>(); foreach (DrawObject o in graphicsList.Selection) { listToFill.Add(o.Clone()); } }
public override void Undo(MapObjects list) { list.UnselectAll(); // Add all objects from cloneList to list. foreach (DrawObject o in cloneList) { list.Add(o); } }
List <DrawObject> cloneList; // contains selected items which are deleted // Create this command BEFORE applying Delete All function. public CommandDelete(MapObjects graphicsList) { cloneList = new List <DrawObject>(); // Make clone of the list selection. foreach (DrawObject o in graphicsList.Selection) { cloneList.Add(o.Clone()); } }
// Create this command BEFORE applying Delete All function. public CommandDeleteAll(MapObjects graphicsList) { cloneList = new List <DrawObject>(); // Make clone of the whole list. // Add objects in reverse order because GraphicsList.Add // insert every object to the beginning. int n = graphicsList.Count; for (int i = n - 1; i >= 0; i--) { cloneList.Add(graphicsList[i].Clone()); } }
// Replace objects in graphicsList with objects from list private void ReplaceObjects(MapObjects graphicsList, List <DrawObject> list) { for (int i = 0; i < graphicsList.Count; i++) { DrawObject replacement = null; foreach (DrawObject o in list) { if (o.GetProperty().ID == graphicsList[i].GetProperty().ID) { replacement = o; break; } } if (replacement != null) { graphicsList.Replace(i, replacement); } } }
// This command is used to make Redo operation. // It makes original command again. public abstract void Redo(MapObjects list);
public override void Redo(MapObjects list) { list.UnselectAll(); list.Add(drawObject); }
public override void Undo(MapObjects list) { list.DeleteLastAddedObject(); }
public override void Redo(MapObjects list) { // Clear list - make DeleteAll again list.Clear(); }
public UndoManager(MapObjects graphicsList) { this.graphicsList = graphicsList; ClearHistory(); }
public override void Redo(MapObjects list) { // Replace all objects in the list with objects from listAfter ReplaceObjects(list, listAfter); }
public override void Undo(MapObjects list) { // Replace all objects in the list with objects from listBefore ReplaceObjects(list, listBefore); }
// Call this function AFTER operation. public void NewState(MapObjects graphicsList) { // Keep objects state after operation. FillList(graphicsList, ref listAfter); }
// Create this command BEFORE operation. public CommandChangeState(MapObjects graphicsList) { // Keep objects state before operation. FillList(graphicsList, ref listBefore); }