/// <summary>
/// Remove object by index.
/// Used for Undo.
/// </summary>
public void RemoveAt(int index)
{
DrawObject o = graphicsList[index];
o.Clear();
if (ehObjectChanged != null)
{
ehObjectChanged(o, OBJ_OPERATE.remove);
}
graphicsList.RemoveAt(index);
}
/// <summary>
/// Insert object to specified place.
/// Used for Undo.
/// </summary>
public void Insert(int index, DrawObject o)
{
if (index >= 0 && o != null)
{
o.Show();
graphicsList.Insert(index, o);
if (ehObjectChanged != null)
{
ehObjectChanged(o, OBJ_OPERATE.insert);
}
}
}
// 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);
}
}
}
// Create this command with DrawObject instance added to the list
public CommandAdd(DrawObject drawObject) : base()
{
// Keep copy of added object
this.drawObject = drawObject.Clone();
}
/// <summary>
/// Add new object to draw DrawArea.Control.
/// Function is called when user left-clicks draw area,
/// and one of ToolObject-derived tools is active.
/// </summary>
/// <param name="control"></param>
/// <param name="o"></param>
protected void AddNewObject(MapControl control, DrawObject o)
{
control.Objects.UnselectAll();
control.Add(o);
control.SetDirty();
}
public void Add(DrawObject obj)
{
// insert to the top of z-order
Insert(0, obj);
}
/// <summary>
/// Left mouse button is pressed
/// </summary>
/// <param name="control"></param>
/// <param name="e"></param>
public override void OnMouseDown(MapControl control, MouseEventArgs e, int zoom)
{
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 control.Objects.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
control.Objects.UnselectAll();
o.Selected = true;
commandChangeState = new CommandChangeState(control.Objects);
break;
}
}
// Test for move (cursor is on the object)
if (selectMode == SelectionMode.None)
{
int n1 = control.Objects.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (control.Objects[i].HitTest(point) == 0)
{
o = control.Objects[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)
{
control.Objects.UnselectAll();
}
// Select clicked object
o.Selected = true;
commandChangeState = new CommandChangeState(control.Objects);
control.Cursor = Cursors.Hand;
}
}
// Net selection
if (selectMode == SelectionMode.None)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
control.Objects.UnselectAll();
}
selectMode = SelectionMode.NetSelection;
control.Selected = true;
}
lastPoint.X = e.X;
lastPoint.Y = e.Y;
startPoint.X = e.X;
startPoint.Y = e.Y;
control.Refresh();
if (selectMode == SelectionMode.NetSelection)
{
// Draw selection rectangle in initial position
ControlPaint.DrawReversibleFrame(
control.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint)),
Color.Black,
FrameStyle.Dashed);
}
}
