/// <summary>
/// Maps the co-ordinates values to points.
/// </summary>
private void MapPixelToActualValue()
{
double x1Value, x2Value, y1Value, y2Value;
if (isSwapX)
{
x1Value = isAxis ? SfChart.PointToAnnotationValue(XAxis, isRotated ? new Point(0, x2) : new Point(x2, 0)) : x2;
x2Value = isAxis ? SfChart.PointToAnnotationValue(XAxis, isRotated ? new Point(0, x1) : new Point(x1, 0)) : x1;
}
else
{
x1Value = isAxis ? SfChart.PointToAnnotationValue(XAxis, isRotated ? new Point(0, x1) : new Point(x1, 0)) : x1;
x2Value = isAxis ? SfChart.PointToAnnotationValue(XAxis, isRotated ? new Point(0, x2) : new Point(x2, 0)) : x2;
}
if (isSwapY)
{
y2Value = isAxis ? SfChart.PointToAnnotationValue(YAxis, isRotated ? new Point(y1, 0) : new Point(0, y1)) : y1;
y1Value = isAxis ? SfChart.PointToAnnotationValue(YAxis, isRotated ? new Point(y2, 0) : new Point(0, y2)) : y2;
}
else
{
y2Value = isAxis ? SfChart.PointToAnnotationValue(YAxis, isRotated ? new Point(y2, 0) : new Point(0, y2)) : y2;
y1Value = isAxis ? SfChart.PointToAnnotationValue(YAxis, isRotated ? new Point(y1, 0) : new Point(0, y1)) : y1;
}
AnnotationManager annotationManager = chart.AnnotationManager;
ShapeAnnotation annotation = annotationManager.CurrentAnnotation as ShapeAnnotation;
AnnotationManager.SetPosition(
annotationManager.PreviousPoints,
annotation.X1,
annotation.X2,
annotation.Y1,
annotation.Y2);
AnnotationManager.SetPosition(annotationManager.CurrentPoints, x1Value, x2Value, y1Value, y2Value);
annotationManager.RaiseDragStarted(); // Raise the DragStarted event
annotationManager.RaiseDragDelta(); // Raise the DragDelta event
if (!annotationManager.DragDeltaArgs.Cancel)
{
ActualX1 = x1Value;
ActualY1 = y1Value;
ActualX2 = x2Value;
ActualY2 = y2Value;
}
}
private void OnNearThumbDragDelta(object sender, DragDeltaEventArgs e)
{
this.IsResizing = true;
annotationManager = Chart.AnnotationManager;
double x2 = 0, y2 = 0;
isRotated = (XAxis != null && XAxis.Orientation == Orientation.Vertical && IsAxis);
HorizontalChange = isRotated ? e.VerticalChange : e.HorizontalChange;
VerticalChange = isRotated ? e.HorizontalChange : e.VerticalChange;
ShapeAnnotation annotation = annotationManager.CurrentAnnotation as ShapeAnnotation;
AnnotationManager.SetPosition(
annotationManager.PreviousPoints,
annotation.X1,
annotation.X2,
annotation.Y1,
annotation.Y2);
if (!isRotated)
{
if (IsHorizontal)
{
x2 = IsAxis ? SfChart.PointToAnnotationValue(XAxis, new Point(ActualX2 + HorizontalChange, 0)) : ActualX2 + HorizontalChange;
AnnotationManager.SetPosition(
annotationManager.CurrentPoints,
annotation.X1,
x2,
annotation.Y1,
annotation.Y2);
}
if (IsVertical)
{
y2 = IsAxis ? SfChart.PointToAnnotationValue(YAxis, new Point(0, ActualY2 + VerticalChange)) : ActualY2 + VerticalChange;
AnnotationManager.SetPosition(
annotationManager.CurrentPoints,
annotation.X1,
annotation.X2,
annotation.Y1,
y2);
}
}
else
{
if (IsVertical)
{
x2 = IsAxis ? SfChart.PointToAnnotationValue(XAxis, new Point(0, ActualX2 + HorizontalChange)) : ActualX2 + HorizontalChange;
AnnotationManager.SetPosition(
annotationManager.CurrentPoints,
annotation.X1,
x2,
annotation.Y1,
annotation.Y2);
}
if (IsHorizontal)
{
y2 = IsAxis ? SfChart.PointToAnnotationValue(YAxis, new Point(ActualY2 + VerticalChange, 0)) : ActualY2 + VerticalChange;
AnnotationManager.SetPosition(
annotationManager.CurrentPoints,
annotation.X1,
annotation.X2,
annotation.Y1,
y2);
}
}
annotationManager.RaiseDragStarted(); // Raise the DragStarted event
annotationManager.RaiseDragDelta(); // Raise the DragDelta event
if (!annotationManager.DragDeltaArgs.Cancel)
{
if ((!isRotated && IsHorizontal) || (isRotated && IsVertical))
{
ActualX2 = x2;
}
if ((!isRotated && IsVertical) || (isRotated && IsHorizontal))
{
ActualY2 = y2;
}
}
}