public override void LeftButtonDrag(Pane pane, PointF location, PointF locationStart, float pixelSize, ref bool displayUpdateNeeded)
{
Debug.Assert(pane == Pane.Map);
currentLocation = location;
// Update the highlight.
courseObjectDrag = ((CourseObj)courseObjectStart.Clone());
courseObjectDrag.Offset(location.X - startDrag.X, location.Y - startDrag.Y);
// If we're dragging a control in a course (not all controls) then add additional highlights for the leg(s) to/from the control.
if (AreDraggingControlPoint() && courseObjectStart.courseControlId.IsNotNone)
{
ControlPoint control = eventDB.GetControl(courseObjectStart.controlId);
CourseView courseView = selectionMgr.ActiveCourseView;
// Find index of this course control in the course view.
int index;
for (index = 0; index < courseView.ControlViews.Count; ++index)
{
if (courseView.ControlViews[index].courseControlIds.Contains(courseObjectStart.courseControlId))
{
break;
}
}
if (index < courseView.ControlViews.Count)
{
// Get previous and next controls.
int prevIndex = courseView.GetPrevControl(index), nextIndex = courseView.GetNextControl(index);
Id <CourseControl> prevCourseControl = (prevIndex >= 0) ? courseView.ControlViews[prevIndex].courseControlIds[0] : Id <CourseControl> .None;
Id <CourseControl> nextCourseControl = (nextIndex >= 0) ? courseView.ControlViews[nextIndex].courseControlIds[0] : Id <CourseControl> .None;
// Get additional highlights to and from those controls.
additionalHighlights = AddControlMode.CreateLegHighlights(eventDB, ((PointCourseObj)courseObjectDrag).location, courseObjectDrag.controlId, control.kind, prevCourseControl, nextCourseControl,
courseView.CourseObjRatio(courseObjectStart.appearance), courseObjectStart.appearance);
// If we're dragging the start, update the angle of the start appropriately.
if ((control.kind == ControlPointKind.Start || control.kind == ControlPointKind.MapExchange || control.kind == ControlPointKind.MapIssue) &&
additionalHighlights.Length > 0 &&
(courseView.Kind == CourseView.CourseViewKind.Normal || courseView.Kind == CourseView.CourseViewKind.AllVariations))
{
SymPath pathFromStart = ((LineCourseObj)additionalHighlights[additionalHighlights.Length - 1]).path;
PointF[] pts = pathFromStart.FlattenedPoints;
double angleOut = Math.Atan2(pts[1].Y - pts[0].Y, pts[1].X - pts[0].X);
if (!double.IsNaN(angleOut))
{
float angleInDegrees = (float)Geometry.RadiansToDegrees(angleOut);
if (control.kind == ControlPointKind.MapIssue)
{
((MapIssueCourseObj)courseObjectDrag).orientation = angleInDegrees;
}
else
{
((StartCourseObj)courseObjectDrag).orientation = angleInDegrees;
}
}
}
}
}
displayUpdateNeeded = true;
}