private ObjectMoveData _currentObject; // The object being moved currently
public MapObjectMover(IAppContext context, SymbologyPlugin plugin)
{
_context = context ?? throw new ArgumentNullException("context");
_plugin = plugin ?? throw new ArgumentNullException("plugin");
_map = context.Map;
_currentObject = new EmptyMoveData();
plugin.MouseDown += MapMouseDown;
plugin.MouseUp += MapMouseUp;
plugin.MouseMove += MapMouseMove;
}
/// <summary>
/// Start the dragging operation.
/// </summary>
private void MapMouseDown(IMuteMap map, MouseEventArgs e)
{
if (!Active)
{
return;
}
var data = FindMovableItem(e.X, e.Y);
if (data == null)
{
return;
}
_currentObject = data;
var fs = _map.GetFeatureSet(_currentObject.LayerHandle);
if (fs == null)
{
return;
}
IEnvelope env = null;
if (_currentObject.IsChart)
{
var chart = fs.Diagrams[_currentObject.ObjectIndex];
env = chart.ScreenExtents;
}
else
{
var label = fs.Labels.Items[_currentObject.ObjectIndex, _currentObject.PartIndex];
env = label.ScreenExtents;
}
_currentObject.Rect = env.ToRectangle();
DrawLabelRectangle(_currentObject.Rect);
}