public TrackerFeature(IFeatureInteractor featureMutator, IGeometry geometry, int index, Bitmap bitmap)
{
FeatureInteractor = featureMutator;
Geometry = geometry;
Bitmap = bitmap;
Index = index;
}
public override void OnMouseDown(Coordinate worldPosition, MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
var oldSelectedTrackerIndicesCount = SelectedTrackersCount;
var oldTrackerFeatureCount = trackers.Count;
IsBusy = true;
ILayer selectedLayer;
mouseDownLocation = worldPosition;
// Check first if an object is already selected and if the mousedown has occured at this object.
var trackerFeature = GetTrackerAtCoordinate(worldPosition);
if (SelectedFeatureInteractors.Count > 1)
{
// hack: if multiple selection toggle/select complete feature
trackerFeature = null;
}
SetClickOnExistingSelection(false, null);
if (null != trackerFeature)
{
if (1 == SelectedFeatureInteractors.Count)
{
SetClickOnExistingSelection(true, worldPosition);
FocusTracker(trackerFeature);
MapControl.Refresh();
}
return;
}
// single selection. Find the nearest geometry and give
var limit = (float)MapHelper.ImageToWorld(Map, 4);
var nearest = FindNearestFeature(worldPosition, limit, out selectedLayer, ol => ol.Visible);
if (null != nearest)
{
// Create or add a new FeatureInteractor
if (SelectedFeatureInteractors.Count > 0)
{
IFeatureInteractor currentFeatureInteractor = GetActiveFeatureInteractor(nearest);
if (KeyExtendSelection) // Shift key
{
if (null == currentFeatureInteractor)
{
var selectedBranch = nearest as IBranch;
if (selectedBranch != null)
{
SelectBranchesAlongShortestPath(worldPosition, selectedLayer, nearest, selectedBranch);
}
else
{
// not in selection; add
AddSelection(selectedLayer, nearest);
targetNode = null;
}
} // else possibly set default focus tracker
}
else if (KeyToggleSelection) // CTRL key
{
if (null == currentFeatureInteractor)
{
// not in selection; add
AddSelection(selectedLayer, nearest);
SetTargetNodeIfBranch(worldPosition, nearest);
}
else
{
// in selection; remove
RemoveSelection(nearest);
targetNode = null;
}
}
else
{
// no special key processing; handle as a single select.
Clear(false);
if (!StartSelection(selectedLayer, nearest))
{
StartMultiSelect();
}
SetTargetNodeIfBranch(worldPosition, nearest);
}
}
else
{
if (!StartSelection(selectedLayer, nearest))
{
StartMultiSelect();
}
SetTargetNodeIfBranch(worldPosition, nearest);
}
}
else
{
// We didn't find an object at the position of the mouse button -> start a multiple select
if (!KeyExtendSelection)
{
// we are not extending the current selection
Clear(false);
}
if (e.Button == MouseButtons.Left)
{
StartMultiSelect();
}
}
if ((oldSelectedTrackerIndicesCount != SelectedTrackersCount ||
oldTrackerFeatureCount != trackers.Count) && trackingLayer.DataSource.Features.Count != 0)
{
MapControl.Refresh();
}
}
