public override void Redo(GraphicsList 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(GraphicsList 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(GraphicsList graphicsList, ref List<DrawObject> listToFill) { listToFill = new List<DrawObject>(); foreach (DrawObject o in graphicsList.Selection) { listToFill.Add(o.Clone()); } }
public override void Undo(GraphicsList 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(GraphicsList 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(GraphicsList 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(GraphicsList graphicsList, List<DrawObject> list) { for ( int i = 0; i < graphicsList.Count; i++ ) { DrawObject replacement = null; foreach(DrawObject o in list) { if ( o.ID == graphicsList[i].ID ) { replacement = o; break; } } if ( replacement != null ) { graphicsList.Replace(i, replacement); } } }
public override void Redo(GraphicsList list) { list.UnselectAll(); list.Add(drawObject); }
public override void Undo(GraphicsList list) { list.DeleteLastAddedObject(); }
public override void Redo(GraphicsList list) { // Clear list - make DeleteAll again list.Clear(); }
// Create this command BEFORE operation. public CommandChangeState(GraphicsList graphicsList) { // Keep objects state before operation. FillList(graphicsList, ref listBefore); }
public override void Redo(GraphicsList list) { // Replace all objects in the list with objects from listAfter ReplaceObjects(list, listAfter); }
public override void Undo(GraphicsList list) { // Replace all objects in the list with objects from listBefore ReplaceObjects(list, listBefore); }
// Call this function AFTER operation. public void NewState(GraphicsList graphicsList) { // Keep objects state after operation. FillList(graphicsList, ref listAfter); }
/// <summary> /// Initialization /// </summary> /// <param name="owner"></param> /// <param name="docManager"></param> public void Initialize(MainForm owner, DocManager docManager) { SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.OptimizedDoubleBuffer, true); // Keep reference to owner form this.Owner = owner; this.DocManager = docManager; // set default tool activeTool = DrawToolType.Pointer; // create list of graphic objects graphicsList = new GraphicsList(); // Create undo manager undoManager = new UndoManager(graphicsList); // create array of drawing tools tools = new Tool[(int)DrawToolType.NumberOfDrawTools]; tools[(int)DrawToolType.Pointer] = new ToolPointer(); tools[(int)DrawToolType.Rectangle] = new ToolRectangle(); tools[(int)DrawToolType.Ellipse] = new ToolEllipse(); tools[(int)DrawToolType.Line] = new ToolLine(); tools[(int)DrawToolType.Polygon] = new ToolPolygon(); }
// This command is used to make Redo operation. // It makes original command again. public abstract void Redo(GraphicsList list);
public UndoManager(GraphicsList graphicsList) { this.graphicsList = graphicsList; ClearHistory(); }