c# - 如何使图钉可在 bingmap wpf 中的 map 上拖动

Question

我正在研究 bingmap wpf。我在鼠标单击事件上创建了图钉。现在我需要使其可拖动并根据图钉位置跟踪坐标。任何人都知道如何使图钉可拖动以及我们需要在哪个函数中编写代码以在图钉发布时进行更新。

非常感谢您

Answer 1

Vector _mouseToMarker;
private bool _dragPin;
public Pushpin SelectedPushpin { get; set; }

void pin_MouseDown(object sender, MouseButtonEventArgs e)
{
  e.Handled = true;
  SelectedPushpin = sender as Pushpin;
  _dragPin = true;
  _mouseToMarker = Point.Subtract(
    map.LocationToViewportPoint(SelectedPushpin.Location), 
    e.GetPosition(map));
}

private void map_MouseMove(object sender, MouseEventArgs e)
{
  if (e.LeftButton == MouseButtonState.Pressed)
  {
    if (_dragPin && SelectedPushpin != null)
    {
      SelectedPushpin.Location = map.ViewportPointToLocation(
        Point.Add(e.GetPosition(map), _mouseToMarker));
      e.Handled = true;
    }
  }
}