/// <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();
}
/// <summary>
/// This function is used to make Undo operation.
/// It makes action opposite to the original command.
/// </summary>
/// <param name="list">Graphics list</param>
public void Undo(GraphicsList list)
{
// Add all objects from clone list to list -
// opposite to DeleteAll
foreach (DrawObject o in _cloneList)
{
list.Add(o);
}
}
/// <summary>
/// This function is used to make Undo operation.
/// It makes action opposite to the original command.
/// </summary>
/// <param name="list">Graphics list</param>
public void Undo(GraphicsList list)
{
// Add all objects from clone list to list -
// opposite to DeleteAll
foreach (DrawObject o in _cloneList)
{
list.Add(o);
}
}
public void Undo(GraphicsList list)
{
list.UnselectAll();
// Add all objects from cloneList to list.
foreach (DrawObject o in _cloneList)
{
list.Add(o);
}
}
public void Undo(GraphicsList list)
{
list.UnselectAll();
// Add all objects from cloneList to list.
foreach (DrawObject o in _cloneList)
{
list.Add(o);
}
}
private readonly 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());
}
}
private readonly 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());
}
}
// 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 = list.FirstOrDefault(o => o.ID == graphicsList[i].ID);
if (replacement != null)
{
graphicsList.Replace(i, replacement);
}
}
}
// 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 = list.FirstOrDefault(o => o.ID == graphicsList[i].ID);
if (replacement != null)
{
graphicsList.Replace(i, replacement);
}
}
}
// 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());
}
}
// 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());
}
}
public void Redo(GraphicsList list)
{
// Delete from list all objects kept in cloneList
int n = list.Count;
for (int i = n - 1; i >= 0; i--)
{
DrawObject objectToDelete = list[i];
bool toDelete = _cloneList.Any(o => objectToDelete.ID == o.ID);
if (toDelete)
{
list.RemoveAt(i);
}
}
}
public void Redo(GraphicsList list)
{
// Delete from list all objects kept in cloneList
int n = list.Count;
for (int i = n - 1; i >= 0; i--)
{
DrawObject objectToDelete = list[i];
bool toDelete = _cloneList.Any(o => objectToDelete.ID == o.ID);
if (toDelete)
{
list.RemoveAt(i);
}
}
}
// Call this function AFTER operation.
#region ICommand Members
/// <summary>
/// This function is used to make Undo operation.
/// It makes action opposite to the original command.
/// </summary>
/// <param name="list">Graphics list</param>
public void Undo(GraphicsList list)
{
// Replace all objects in the list with objects from listBefore
ReplaceObjects(list, _listBefore);
}
// Create this command BEFORE operation.
public CommandChangeState(GraphicsList graphicsList)
{
// Keep objects state before operation.
FillList(graphicsList, ref _listBefore);
}
/// <summary>
/// Right-click handler
/// </summary>
/// <param name="e"> </param>
private void OnContextMenu(MouseEventArgs e)
{
// Change current selection if necessary
var point = new Point(e.X, e.Y);
int n = GraphicsList.Count;
DrawObject o = null;
for (int i = 0; i < n; i++)
{
if (GraphicsList[i].HitTest(point) == 0)
{
o = GraphicsList[i];
break;
}
}
if (o != null)
{
if (!o.Selected)
{
GraphicsList.UnselectAll();
}
// Select clicked object
o.Selected = true;
}
else
{
GraphicsList.UnselectAll();
}
Refresh(); // in the case selection was changed
// Show context menu.
// Context menu items are filled from owner form Edit menu items.
_contextMenu = new ContextMenuStrip();
// int nItems = owner.ContextParent.DropDownItems.Count;
// Read Edit items and move them to context menu.
// Since every move reduces number of items, read them in reverse order.
// To get items in direct order, insert each of them to beginning.
// for (int i = nItems - 1; i >= 0; i--)
// {
// m_ContextMenu.Items.Insert(0, owner.ContextParent.DropDownItems[i]);
// }
// Show context menu for owner form, so that it handles items selection.
// Convert point from this window coordinates to owner's coordinates.
point.X += Left;
point.Y += Top;
//m_ContextMenu.Show(owner, point);
//Owner.SetStateOfControls(); // enable/disable menu items
// Context menu is shown, but owner's Edit menu is now empty.
// Subscribe to context menu Closed event and restore items there.
_contextMenu.Closed += delegate
{
if (_contextMenu != null) // precaution
{
// nItems = m_ContextMenu.Items.Count;
// for (int k = nItems - 1; k >= 0; k--)
// {
// owner.ContextParent.DropDownItems.Insert(0, m_ContextMenu.Items[k]);
// }
}
};
}
public UndoManager(GraphicsList graphicsList)
{
_graphicsList = graphicsList;
ClearHistory();
}
/// <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();
}
// Fill list from selection
private void FillList(GraphicsList graphicsList, ref List<DrawObject> listToFill)
{
listToFill = graphicsList.Selection.Select(o => o.Clone()).ToList();
}
// Call this function AFTER operation.
#region ICommand Members
/// <summary>
/// This function is used to make Undo operation.
/// It makes action opposite to the original command.
/// </summary>
/// <param name="list">Graphics list</param>
public void Undo(GraphicsList list)
{
// Replace all objects in the list with objects from listBefore
ReplaceObjects(list, _listBefore);
}
public void NewState(GraphicsList graphicsList)
{
// Keep objects state after operation.
FillList(graphicsList, ref _listAfter);
}
/// <summary>
/// This command is used to make Redo operation.
/// It makes original command again.
/// </summary>
/// <param name="list">Graphics list</param>
public void Redo(GraphicsList list)
{
// Clear list - make DeleteAll again
list.Clear();
}
/// <summary>
/// This command is used to make Redo operation.
/// It makes original command again.
/// </summary>
/// <param name="list">Graphics list</param>
public 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);
}
// Fill list from selection
private void FillList(GraphicsList graphicsList, ref List <DrawObject> listToFill)
{
listToFill = graphicsList.Selection.Select(o => o.Clone()).ToList();
}
public void NewState(GraphicsList graphicsList)
{
// Keep objects state after operation.
FillList(graphicsList, ref _listAfter);
}
/// <summary>
/// This command is used to make Redo operation.
/// It makes original command again.
/// </summary>
/// <param name="list">Graphics list</param>
public void Redo(GraphicsList list)
{
// Replace all objects in the list with objects from listAfter
ReplaceObjects(list, _listAfter);
}
public UndoManager(GraphicsList graphicsList)
{
_graphicsList = graphicsList;
ClearHistory();
}
/// <summary>
/// This command is used to make Redo operation.
/// It makes original command again.
/// </summary>
/// <param name="list">Graphics list</param>
public void Redo(GraphicsList list)
{
// Replace all objects in the list with objects from listAfter
ReplaceObjects(list, _listAfter);
}
