private void UpdateRectCache(AnnotationBase annoToUpdate)
{
var anno = _rectCache.First(a => a.annotation == annoToUpdate);
anno.BoundingRectangle = Helpers.GetRect(Chart, anno.annotation);
}
private void OnMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button != MouseButtons.Left)
{
return;
}
if (AllowMove && SelectedAnnotation != null && _isDragging && _flexChart.PlotRect.Contains(e.Location))
{
Cursor.Current = Cursors.SizeAll;
_newPoint = e.Location;
var diff = new PointF
{
X = _newPoint.X - _oldPoint.X,
Y = _newPoint.Y - _oldPoint.Y
};
if (SelectedAnnotation is Line)
{
var line = SelectedAnnotation as Line;
var start = Helpers.AnnoPointToCoords(_flexChart, line, line.Start);
var end = Helpers.AnnoPointToCoords(_flexChart, line, line.End);
start = start.OffSet(diff);
end = end.OffSet(diff);
line.Start = Helpers.CoordsToAnnoPoint(_flexChart, line, start);
line.End = Helpers.CoordsToAnnoPoint(_flexChart, line, end);
}
else if (SelectedAnnotation is Polygon)
{
var polygon = SelectedAnnotation as Polygon;
for (int i = 0; i < polygon.Points.Count; i++)
{
var pt = Helpers.AnnoPointToCoords(_flexChart, polygon, polygon.Points[i]);
pt = pt.OffSet(diff);
polygon.Points[i] = Helpers.CoordsToAnnoPoint(_flexChart, polygon, pt);
}
}
else
{
var location = Helpers.AnnoPointToCoords(_flexChart, SelectedAnnotation, SelectedAnnotation.Location);
location = location.OffSet(diff);
SelectedAnnotation.Location = Helpers.CoordsToAnnoPoint(_flexChart, SelectedAnnotation, location);
}
_oldPoint = _newPoint;
return;
}
if (this.AllowAdd && this._start != PointF.Empty)
{
if (_drawing)
{
this.UpdateAnnotaion(e.Location);
}
else
{
SizeF sz = new SizeF
{
Height = Math.Abs(this._start.Y - (float)e.Location.Y),
Width = Math.Abs(this._start.X - (float)e.Location.X)
};
Size threshold = SystemInformation.DragSize;
if (sz.Width > (float)threshold.Width && sz.Height > (float)threshold.Height)
{
this.AddAnnotation(this._start);
}
}
}
}