public override void OnMouseDown(VisualGraph drawArea, MouseEventArgs e)
{
Point point = new Point(e.X, e.Y);
selectMode = SelectionMode.None;
int n = drawArea.ObjList.SelectionCount;
for (int i = n - 1; i >= 0; i--)
{
DrawObject o = drawArea.ObjList.GetSelectedObject(i);
int handleNumber = o.HitTest(point);
if (handleNumber > 0)
{
selectMode = SelectionMode.Size;
resizedObject = o;
resizedObjectHandle = handleNumber;
drawArea.ObjList.UnselectAll();
o.Selected = true;
break;
}
}
if (selectMode == SelectionMode.None)
{
int m = drawArea.ObjList.Count();
DrawObject o = null;
for (int i = m - 1; i >= 0; i--)
{
if (drawArea.ObjList[i].HitTest(point) == 0)
{
o = drawArea.ObjList[i];
break;
}
}
if (o != null)
{
selectMode = SelectionMode.Move;
o.Selected = true;
}
}
if (selectMode == SelectionMode.None)
{
selectMode = SelectionMode.NetSelection;
drawArea.DrawNetRectangle = true;
}
lastPoint.X = point.X;
lastPoint.Y = point.Y;
startPoint.X = point.X;
startPoint.Y = point.Y;
drawArea.Capture = true;
drawArea.NetRectangle = GetNormalizedRectangle(startPoint, lastPoint);
drawArea.Refresh();
}
public override void OnMouseUp(VisualGraph drawArea, MouseEventArgs e)
{
Point point = new Point(e.X, e.Y);
if (selectMode == SelectionMode.NetSelection)
{
drawArea.ObjList.SelectInRectangle(drawArea.NetRectangle);
selectMode = SelectionMode.None;
drawArea.DrawNetRectangle = false;
}
if (resizedObject != null)
{
resizedObject.Normalize();
resizedObject = null;
}
selectMode = SelectionMode.None;
drawArea.Refresh();
}
public override void OnMouseMove(VisualGraph drawArea, MouseEventArgs e)
{
Point point = new Point(e.X, e.Y);
if (e.Button == MouseButtons.None)
{
Cursor cursor = null;
for (int i = drawArea.ObjList.Count() - 1; i >= 0; i--)
{
int n = drawArea.ObjList[i].HitTest(point);
if (n > 0)
{
cursor = drawArea.ObjList[i].GetHandleCursor(n);
break;
}
}
if (cursor == null)
{
cursor = Cursors.Default;
}
drawArea.Cursor = cursor;
return;
}
if (e.Button != MouseButtons.Left)
{
return;
}
int dx = point.X - lastPoint.X;
int dy = point.Y - lastPoint.Y;
lastPoint.X = point.X;
lastPoint.Y = point.Y;
if (selectMode == SelectionMode.Size)
{
if (resizedObject != null)
{
resizedObject.MoveHandleTo(point, resizedObjectHandle);
drawArea.Refresh();
}
}
if (selectMode == SelectionMode.Move)
{
int n = drawArea.ObjList.SelectionCount;
for (int i = n - 1; i >= 0; i--)
{
drawArea.ObjList.GetSelectedObject(i).Move(dx, dy);
}
DrawObject l = (DrawObject)drawArea.ObjList.GetSelectedObject(point);
if (l != null)
{
drawArea.Cursor = Cursors.SizeAll;
}
drawArea.Refresh();
}
if (selectMode == SelectionMode.NetSelection)
{
drawArea.NetRectangle = GetNormalizedRectangle(startPoint, lastPoint);
drawArea.Refresh();
return;
}
}
