private TopologyDropTargetCourseObj FindNearbyDropTarget(PointF location)
{
const float MAXDISTANCE = 9F;
const float MINDRAGDIST = 5F;
CourseLayout layout = selectionMgr.TopologyLayout;
TopologyDropTargetCourseObj nearest = null;
Id <CourseControl> courseControlDrag = courseObjectDrag.courseControlId;
float nearestDistance = float.MaxValue;
// Find nearest drop target that is within MAXDISTANCE of location, and not adjacent to the
// course control we are dragging.
foreach (CourseObj obj in layout)
{
TopologyDropTargetCourseObj dropTarget = obj as TopologyDropTargetCourseObj;
if (dropTarget != null &&
((dropTarget.courseControlId != courseControlDrag && dropTarget.courseControlId2 != courseControlDrag) ||
courseObjectStart.DistanceFromPoint(dropTarget.location) > MINDRAGDIST))
{
float distance = Geometry.DistanceF(location, dropTarget.location);
if (distance < nearestDistance && distance < MAXDISTANCE)
{
nearestDistance = distance;
nearest = dropTarget;
}
}
}
return(nearest);
}
private void CreateLegBetweenControls(CourseView.ControlView controlView1, ControlPosition controlPosition1, CourseView.ControlView controlView2, ControlPosition controlPosition2, int splitLegIndex, ForkPosition forkStart)
{
List <DropTarget> dropTargets;
SymPath path = PathBetweenControls(controlPosition1, controlPosition2, forkStart, out dropTargets);
CourseObj courseObj = new TopologyLegCourseObj(controlView1.controlId, controlView1.courseControlIds[splitLegIndex], controlView2.courseControlIds[0], courseObjRatio, appearance, path);
CourseLayer layer;
if (LegInSpecificVariation(controlView1.courseControlIds[splitLegIndex], controlView2.courseControlIds[0]))
{
layer = courseLayerSpecificVariation;
}
else
{
layer = courseLayerAllVariationsAndParts;
}
courseObj.layer = layer;
courseLayout.AddCourseObject(courseObj);
// No drop targets between map issue and start.
if (!(eventDB.GetControl(controlView1.controlId).kind == ControlPointKind.MapIssue &&
eventDB.GetControl(controlView2.controlId).kind == ControlPointKind.Start))
{
// Add the drop targets
foreach (DropTarget dropTarget in dropTargets)
{
courseObj = new TopologyDropTargetCourseObj(controlView1.controlId, controlView1.courseControlIds[splitLegIndex], controlView2.courseControlIds[0], courseObjRatio, appearance,
LocationFromAbstractPosition(dropTarget.abstractX, dropTarget.abstractY), dropTarget.insertionLoc);
// Along the selected leg, show the drop targets in light gray. Along other legs, drop targets are invisible.
if (controlView1.courseControlIds[splitLegIndex] == courseControlIdSelection1 && controlView2.courseControlIds.Contains(courseControlIdSelection2))
{
courseObj.layer = CourseLayer.AllVariations;
}
else
{
courseObj.layer = CourseLayer.InvisibleObjects;
}
courseLayout.AddCourseObject(courseObj);
}
}
if (forkStart != null && forkStart.variationCode != '\0')
{
// There is a variation fork.
courseObj = CreateVariationCode(controlView1, controlPosition1, splitLegIndex, forkStart);
courseLayout.AddCourseObject(courseObj);
}
}
public override void LeftButtonEndDrag(Pane pane, PointF location, PointF locationStart, float pixelSize, ref bool displayUpdateNeeded)
{
Debug.Assert(pane == Pane.Topology);
TopologyDropTargetCourseObj dropAt = FindNearbyDropTarget(location);
if (dropTargetHighlight != null)
{
Id <CourseControl> courseControlToMove = courseObjectStart.courseControlId;
Id <CourseControl> courseControlDest1 = dropAt.courseControlId;
Id <CourseControl> courseControlDest2 = dropAt.courseControlId2;
controller.RearrangeControl(courseControlToMove, courseControlDest1, courseControlDest2, dropAt.InsertionLoc);
}
dropTargetHighlight = null;
displayUpdateNeeded = true;
controller.DefaultCommandMode();
}
public void DropTargetOffset()
{
CourseObj courseobj = new TopologyDropTargetCourseObj(ControlId(0), CourseControlId(0), CourseControlId(0), 1.0F, defaultCourseAppearance, new PointF(0, 0));
SingleObjectOffset(courseobj, "droptarget_offset");
}
