// 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);
}
}
}
/// <summary>
/// Add new object to draw area. Function is called when user left-clicks draw area, and one of ToolObject-derived tools is active.
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="o"> </param>
protected void AddNewObject(TransparentCanvas drawArea, DrawObject o)
{
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
drawArea.GraphicsList.Add(o);
drawArea.Capture = true;
drawArea.Refresh();
drawArea.SetDirty();
}
/// <summary>
/// Add new object to draw area. Function is called when user left-clicks draw area, and one of ToolObject-derived tools is active.
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="o"> </param>
protected void AddNewObject(TransparentCanvas drawArea, DrawObject o)
{
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
drawArea.GraphicsList.Add(o);
drawArea.Capture = true;
drawArea.Refresh();
drawArea.SetDirty();
}
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 Draw(Graphics g)
{
int n = _graphicsList.Count;
// Enumerate list in reverse order to get first
// object on the top of Z-order.
for (int i = n - 1; i >= 0; i--)
{
DrawObject o = _graphicsList[i];
o.Draw(g);
if (o.Selected)
{
o.DrawTracker(g);
}
}
}
/// <summary>
/// Left mouse button is pressed
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseDown(TransparentCanvas drawArea, MouseEventArgs e)
{
_commandChangeState = null;
_wasMove = false;
_selectMode = SelectionMode.None;
Point point = new Point(e.X, e.Y);
// Test for resizing (only if control is selected, cursor is on the handle)
foreach (DrawObject o in drawArea.GraphicsList.Selection)
{
int handleNumber = o.HitTest(point);
if (handleNumber > 0)
{
_selectMode = SelectionMode.Size;
// keep resized object in class member
_resizedObject = o;
_resizedObjectHandle = handleNumber;
// Since we want to resize only one object, unselect all other objects
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
break;
}
}
// Test for move (cursor is on the object)
if (_selectMode == SelectionMode.None)
{
int n1 = drawArea.GraphicsList.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (drawArea.GraphicsList[i].HitTest(point) == 0)
{
o = drawArea.GraphicsList[i];
break;
}
}
if (o != null)
{
_selectMode = SelectionMode.Move;
// Unselect all if Ctrl is not pressed and clicked object is not selected yet
if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
{
drawArea.GraphicsList.UnselectAll();
}
// Select clicked object
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
drawArea.Cursor = Cursors.SizeAll;
}
}
// Net selection
if (_selectMode == SelectionMode.None)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
drawArea.GraphicsList.UnselectAll();
}
_selectMode = SelectionMode.NetSelection;
}
_lastPoint.X = e.X;
_lastPoint.Y = e.Y;
_startPoint.X = e.X;
_startPoint.Y = e.Y;
drawArea.Capture = true;
drawArea.Refresh();
if (_selectMode == SelectionMode.NetSelection)
{
// Draw selection rectangle in initial position
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint)),
Color.Black,
FrameStyle.Dashed);
}
}
/// <summary>
/// Right mouse button is released
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseUp(TransparentCanvas drawArea, MouseEventArgs e)
{
if (_selectMode == SelectionMode.NetSelection)
{
// Remove old selection rectangle
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint)),
Color.Black,
FrameStyle.Dashed);
// Make group selection
drawArea.GraphicsList.SelectInRectangle(
DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint));
_selectMode = SelectionMode.None;
}
if (_resizedObject != null)
{
// after resizing
_resizedObject.Normalize();
_resizedObject = null;
}
drawArea.Capture = false;
drawArea.Refresh();
if (_commandChangeState != null && _wasMove)
{
// Keep state after moving/resizing and add command to history
_commandChangeState.NewState(drawArea.GraphicsList);
drawArea.AddCommandToHistory(_commandChangeState);
_commandChangeState = null;
}
}
/// <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]);
// }
}
};
}
/// <summary>
/// Left mouse button is pressed
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseDown(TransparentCanvas drawArea, MouseEventArgs e)
{
_commandChangeState = null;
_wasMove = false;
_selectMode = SelectionMode.None;
Point point = new Point(e.X, e.Y);
// Test for resizing (only if control is selected, cursor is on the handle)
foreach (DrawObject o in drawArea.GraphicsList.Selection)
{
int handleNumber = o.HitTest(point);
if (handleNumber > 0)
{
_selectMode = SelectionMode.Size;
// keep resized object in class member
_resizedObject = o;
_resizedObjectHandle = handleNumber;
// Since we want to resize only one object, unselect all other objects
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
break;
}
}
// Test for move (cursor is on the object)
if (_selectMode == SelectionMode.None)
{
int n1 = drawArea.GraphicsList.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (drawArea.GraphicsList[i].HitTest(point) == 0)
{
o = drawArea.GraphicsList[i];
break;
}
}
if (o != null)
{
_selectMode = SelectionMode.Move;
// Unselect all if Ctrl is not pressed and clicked object is not selected yet
if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
{
drawArea.GraphicsList.UnselectAll();
}
// Select clicked object
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
drawArea.Cursor = Cursors.SizeAll;
}
}
// Net selection
if (_selectMode == SelectionMode.None)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
drawArea.GraphicsList.UnselectAll();
}
_selectMode = SelectionMode.NetSelection;
}
_lastPoint.X = e.X;
_lastPoint.Y = e.Y;
_startPoint.X = e.X;
_startPoint.Y = e.Y;
drawArea.Capture = true;
drawArea.Refresh();
if (_selectMode == SelectionMode.NetSelection)
{
// Draw selection rectangle in initial position
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint)),
Color.Black,
FrameStyle.Dashed);
}
}
/// <summary>
/// Replace object in specified place. Used for Undo.
/// </summary>
public void Replace(int index, DrawObject obj)
{
if (index >= 0 && index < _graphicsList.Count)
{
_graphicsList.RemoveAt(index);
_graphicsList.Insert(index, obj);
}
}
/// <summary>
/// Insert object to specified place. Used for Undo.
/// </summary>
public void Insert(int index, DrawObject obj)
{
if (index >= 0 && index < _graphicsList.Count)
{
_graphicsList.Insert(index, obj);
}
}
public void Add(DrawObject obj)
{
// insert to the top of z-order
_graphicsList.Insert(0, obj);
}
/// <summary>
/// Copy fields from this instance to cloned instance drawObject. Called from Clone functions of derived classes.
/// </summary>
protected void FillDrawObjectFields(DrawObject drawObject)
{
drawObject._selected = _selected;
drawObject._color = _color;
drawObject._penWidth = _penWidth;
drawObject.ID = ID;
}
public void Add(DrawObject obj)
{
// insert to the top of z-order
_graphicsList.Insert(0, obj);
}
