private Rectangle GetNodePosition(RectNodePosition position)
{
switch (position)
{
case RectNodePosition.BottomCenter:
return new Rectangle(_rectangle.X + _rectangle.Width/2-_sizeOfNode/2, _rectangle.Y + _rectangle.Height-_sizeOfNode/2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.BottomLeft:
return new Rectangle(_rectangle.X - _sizeOfNode/2, _rectangle.Y + _rectangle.Height-_sizeOfNode/2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.BottomRight:
return new Rectangle(_rectangle.X + _rectangle.Width - _sizeOfNode / 2, _rectangle.Y + _rectangle.Height - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.MiddleLeft:
return new Rectangle(_rectangle.X - _sizeOfNode / 2, _rectangle.Y + _rectangle.Height / 2 - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.MiddleRight:
return new Rectangle(_rectangle.X + _rectangle.Width - _sizeOfNode / 2, _rectangle.Y + _rectangle.Height / 2 - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.TopCenter:
return new Rectangle(_rectangle.X + _rectangle.Width / 2 - _sizeOfNode / 2, _rectangle.Y - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.TopLeft:
return new Rectangle(_rectangle.X - _sizeOfNode / 2, _rectangle.Y - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
case RectNodePosition.TopRight:
return new Rectangle(_rectangle.X + _rectangle.Width - _sizeOfNode / 2, _rectangle.Y - _sizeOfNode / 2, _sizeOfNode, _sizeOfNode);
}
return new Rectangle();
}
private void PictureBoxOnMouseDown(object sender, MouseEventArgs mouseEventArgs)
{
if (!IsSelected)
return;
_holdMouseFlag = true;
_selectedNode = GetNodeFromPoint(mouseEventArgs.Location);
if (_rectangle.Contains(new Point(mouseEventArgs.X, mouseEventArgs.Y)))
{
_movingFlag = true;
}
_oldLocationX = mouseEventArgs.X;
_oldLocationY = mouseEventArgs.Y;
_oldRectangle = _rectangle;
_pictureBox.Refresh();
}
private Cursor GetCursor(RectNodePosition nodePosition)
{
switch (nodePosition)
{
case RectNodePosition.BottomCenter:
case RectNodePosition.TopCenter:
return Cursors.SizeNS;
case RectNodePosition.BottomRight:
case RectNodePosition.TopLeft:
return Cursors.SizeNWSE;
case RectNodePosition.BottomLeft:
case RectNodePosition.TopRight:
return Cursors.SizeNESW;
case RectNodePosition.MiddleLeft:
case RectNodePosition.MiddleRight:
return Cursors.SizeWE;
default:
return Cursors.Default;
}
}
