protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (!_enableGuides)
return;
if (e.Button != MouseButtons.Left)
return;
if (_parent.Document == null)
return;
FlowChart doc = _parent.Document;
// Record undo operation
_command = null;
if (doc.UndoManager.UndoEnabled)
{
_command = new CompositeCmd(doc, "Align");
foreach (ChartObject obj in doc.Objects)
_command.AddSubCmd(new ModifyItemCmd(obj));
}
// Begin align action
Capture = true;
_aligning = true;
_alignedNodes.Clear();
_ptInitial = doc.ClientToDoc(new Point(e.X, e.Y));
_ptCurrent = _ptInitial;
_align = AlignStart.Undetermined;
}
private bool pasteSelection(FlowChart doc, ItemsAndGroups data,
CompositeCmd cmd, float dx, float dy)
{
if (data.items.Count == 0) return false;
doc.Selection.Clear();
// add nodes
foreach (ChartObject item in data.items)
{
if (item is Node)
{
doc.Add(item);
doc.Selection.AddObject(item);
}
}
Hashtable arrowPoints = null;
if (dx != 0 || dy != 0)
arrowPoints = new Hashtable();
foreach (ChartObject item in data.items)
{
if (item is Arrow)
{
Arrow arrow = item as Arrow;
doc.Add(arrow);
doc.Selection.AddObject(arrow);
if (arrowPoints != null)
arrowPoints.Add(arrow, arrow.ControlPoints.Clone());
}
}
// add groups
foreach (Group group in data.groups)
doc.Add(group);
if (dx != 0 || dy != 0)
{
// offset nodes
foreach (ChartObject item in data.items)
{
if (item is Node && item.MasterGroup == null)
{
ModifyItemCmd mc = (cmd == null) ? null : new ModifyItemCmd(item);
Node node = item as Node;
RectangleF rect = node.BoundingRect;
rect.Offset(dx, dy);
node.BoundingRect = rect;
if (mc != null)
{
mc.Execute(true);
cmd.AddSubCmd(mc);
}
}
}
// offset arrows
foreach (ChartObject item in data.items)
{
if (item is Arrow)
{
ModifyItemCmd mc = (cmd == null) ? null : new ModifyItemCmd(item);
Arrow arrow = item as Arrow;
arrow.Points = arrowPoints[arrow] as PointCollection;
for (int i = 0; i < arrow.ControlPoints.Count; ++i)
{
PointF pt = arrow.ControlPoints[i];
arrow.ControlPoints[i] = new PointF(pt.X + dx, pt.Y + dy);
}
arrow.UpdateFromPoints();
if (mc != null)
{
mc.Execute(true);
cmd.AddSubCmd(mc);
}
}
}
}
return true;
}
// save positions of all items on layout
internal void onStartLayout(string title)
{
if (!undoEnabled) return;
currLayoutCmd = new CompositeCmd(document, title);
foreach (ChartObject item in document.Objects)
currLayoutCmd.AddSubCmd(new ModifyItemCmd(item));
}