public override void Redo(ref MokkanList 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.ID == o.ID)
{
toDelete = true;
break;
}
}
if (toDelete)
{
list.RemoveAt(i);
}
}
}
public override void Undo(ref MokkanList list)
{
// Add all objects from clone list to list -
// opposite to DeleteAll
foreach (DrawObject o in cloneList)
{
list.Add(o);
}
}
public override void Redo(ref MokkanList list)
{
list.UnselectAll();
foreach (DrawObject o in cloneObjects)
{
list.Add(o);
}
addedCount = cloneObjects.Count;
}
public override void Undo(ref MokkanList 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(MokkanList mokkanList)
{
cloneList = new List <DrawObject>();
// Make clone of the list selection.
foreach (DrawObject o in mokkanList.Selection)
{
cloneList.Add(o.Clone());
}
}
/// <summary>
/// Clone this instance
/// </summary>
/// <returns></returns>
public MokkanList Clone()
{
MokkanList ret = (MokkanList)this.MemberwiseClone();
MokkanObjectList list = new MokkanObjectList();
foreach (DrawObject o in MokkanObjectList)
{
list.Add(o.Clone());
}
ret.MokkanObjectList = list;
return(ret);
}
// Fill list from selection
private void FillList(MokkanList mokkanList, ref List <DrawObject> listToFill)
{
listToFill = new List <DrawObject>();
DrawObject changedObj;
foreach (DrawObject o in mokkanList.Selection)
{
changedObj = o.Clone();
changedObj.Selected = false;
listToFill.Add(changedObj);
}
}
// Create this command BEFORE applying Delete All function.
public CommandDeleteAll(MokkanList mokkanList)
{
cloneList = new List <DrawObject>();
// Make clone of the whole list.
// Add objects in reverse order because mokkanList.Add
// insert every object to the beginning.
int n = mokkanList.Count;
for (int i = n - 1; i >= 0; i--)
{
cloneList.Add(mokkanList[i].Clone());
}
}
// Replace objects in mokkanList with objects from list
private void ReplaceObjects(MokkanList mokkanList, List <DrawObject> list)
{
for (int i = 0; i < mokkanList.Count; i++)
{
DrawObject replacement = null;
foreach (DrawObject o in list)
{
if (o.ID == mokkanList[i].ID)
{
replacement = o;
replacement.Selected = true;
break;
}
}
if (replacement != null)
{
mokkanList.Replace(i, replacement);
}
}
}
public override void Redo(ref MokkanList list)
{
// Clear list - make DeleteAll again
list.Clear();
}
public override void Redo(ref MokkanList list)
{
list = listAfter.Clone();
}
public UndoManager(MokkanList mokkanList)
{
this._mokkanList = mokkanList;
ClearHistory();
}
public override void Undo(ref MokkanList list)
{
// Replace all objects in the list with objects from listBefore
ReplaceObjects(list, listBefore);
}
public override void Undo(ref MokkanList list)
{
list.DeleteLastAddedObjects(addedCount);
}
// Create this command BEFORE operation.
public CommandChangeState(MokkanList mokkanList)
{
// Keep objects state before operation.
FillList(mokkanList, ref listBefore);
}
// Call this function AFTER operation.
public void NewState(MokkanList mokkanList)
{
// Keep objects state after operation.
FillList(mokkanList, ref listAfter);
}
// Create this command BEFORE operation.
public CommandChange(MokkanList mokkanList)
{
// Keep objects state before operation.
listBefore = mokkanList.Clone();
}
public override void Redo(ref MokkanList list)
{
// Replace all objects in the list with objects from listAfter
ReplaceObjects(list, listAfter);
}
// Call this function AFTER operation.
public void NewState(MokkanList mokkanList)
{
// Keep objects state after operation.
listAfter = mokkanList.Clone();
}
public override void Undo(ref MokkanList list)
{
list = listBefore.Clone();
}
// This command is used to make Redo operation. // It makes original command again. public abstract void Redo(ref MokkanList list);