/// <summary>
/// 鼠标-调整新多边形的大小
/// </summary>
public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
{
drawArea.Cursor = Cursor;
if (e.Button != MouseButtons.Left)
{
return;
}
if (_newPolygon == null)
{
return; // precaution
}
var point = new Point(e.X, e.Y);
int distance = (e.X - _lastX) * (e.X - _lastX) + (e.Y - _lastY) * (e.Y - _lastY);
try
{
if (distance < MinDistance)
{
//最后两点之间的距离小于最小值-
//移动最后一个点
_newPolygon.MoveHandleTo(point, _newPolygon.HandleCount);
}
else
{
// 添加新点
_newPolygon.AddPoint(point);
_lastX = e.X;
_lastY = e.Y;
}
drawArea.Refresh();
}
catch (Exception ex)
{
SVGErr.Log("ToolPolygon", "OnMouse", ex.ToString(), SVGErr._LogPriority.Info);
}
}
