private void AnnotationDrag(double xTranslate, double yTranslate)
{
ShapeAnnotation selectedAnnotation = (SelectedAnnotation as ShapeAnnotation);
var lineAnnotation = selectedAnnotation as LineAnnotation;
bool isDraggable = (selectedAnnotation.CanResize && AnnotationResizer != null) ?
!AnnotationResizer.IsResizing :
(lineAnnotation != null) ?
!lineAnnotation.IsResizing :
true;
object x1, x2, y1, y2;
if (selectedAnnotation.CanDrag && isDraggable)
{
selectedAnnotation.IsDragging = true;
bool isXAxis = selectedAnnotation.DraggingMode == AxisMode.Horizontal;
bool isYAxis = selectedAnnotation.DraggingMode == AxisMode.Vertical;
bool isAll = selectedAnnotation.DraggingMode == AxisMode.All;
if (selectedAnnotation.CoordinateUnit == CoordinateUnit.Pixel)
{
x1 = (isAll || isXAxis) ? Convert.ToDouble(selectedAnnotation.X1) + xTranslate : selectedAnnotation.X1;
x2 = (isAll || isXAxis) ? Convert.ToDouble(selectedAnnotation.X2) + xTranslate : selectedAnnotation.X2;
y1 = (isAll || isYAxis) ? Convert.ToDouble(selectedAnnotation.Y1) + yTranslate : selectedAnnotation.Y1;
y2 = (isAll || isYAxis) ? Convert.ToDouble(selectedAnnotation.Y2) + yTranslate : selectedAnnotation.Y2;
}
else
{
xTranslate = selectedAnnotation.XAxis.IsInversed ? -xTranslate : xTranslate;
yTranslate = selectedAnnotation.YAxis.IsInversed ? -yTranslate : yTranslate;
double xAxisChange = selectedAnnotation.XAxis.PixelToCoefficientValue(xTranslate);
double yAxisChange = selectedAnnotation.YAxis.PixelToCoefficientValue(yTranslate);
x2 = (isAll || isXAxis) ? Annotation.ConvertToObject(CalculatePointValue(selectedAnnotation.X2, xAxisChange, true, false), selectedAnnotation.XAxis) : selectedAnnotation.X2;
x1 = (isAll || isXAxis) ? Annotation.ConvertToObject(CalculatePointValue(selectedAnnotation.X1, xAxisChange, true, false), selectedAnnotation.XAxis) : selectedAnnotation.X1;
y2 = (isAll || isYAxis) ? Annotation.ConvertToObject(CalculatePointValue(selectedAnnotation.Y2, yAxisChange, false, false), selectedAnnotation.YAxis) : selectedAnnotation.Y2;
y1 = (isAll || isYAxis) ? Annotation.ConvertToObject(CalculatePointValue(selectedAnnotation.Y1, yAxisChange, false, false), selectedAnnotation.YAxis) : selectedAnnotation.Y1;
}
AnnotationManager.SetPosition(
PreviousPoints,
selectedAnnotation.X1,
selectedAnnotation.X2,
selectedAnnotation.Y1,
selectedAnnotation.Y2);
AnnotationManager.SetPosition(CurrentPoints, x1, x2, y1, y2);
RaiseDragStarted(); // Raise DragStarted event
RaiseDragDelta(); // Raise the DragDelta event
if (!DragDeltaArgs.Cancel)
{
if (AnnotationResizer != null && !AnnotationResizer.IsResizing)
{
selectedAnnotation.X1 = AnnotationResizer.X1 = x1;
selectedAnnotation.X2 = AnnotationResizer.X2 = x2;
selectedAnnotation.Y1 = AnnotationResizer.Y1 = y1;
selectedAnnotation.Y2 = AnnotationResizer.Y2 = y2;
}
else
{
selectedAnnotation.X1 = x1;
selectedAnnotation.X2 = x2;
selectedAnnotation.Y1 = y1;
selectedAnnotation.Y2 = y2;
}
var axisMarker = selectedAnnotation as AxisMarker;
if (axisMarker != null)
{
if (axisMarker.ParentAnnotation is VerticalLineAnnotation)
{
if (axisMarker.ParentAnnotation.XAxis.Orientation == Orientation.Horizontal)
{
axisMarker.ParentAnnotation.X1 = selectedAnnotation.X1;
}
else
{
axisMarker.ParentAnnotation.Y1 = selectedAnnotation.Y1;
}
}
else
{
if (axisMarker.ParentAnnotation.XAxis.Orientation == Orientation.Vertical)
{
axisMarker.ParentAnnotation.X1 = selectedAnnotation.X1;
}
else
{
axisMarker.ParentAnnotation.Y1 = selectedAnnotation.Y1;
}
}
}
if (AnnotationResizer != null)
{
AnnotationResizer.MapActualValueToPixels();
}
}
selectedAnnotation.IsDragging = false;
}
}