private void XySegmentDraggingBase_OnDragStart(object sender, ChartDragStartEventArgs e)
{
e.Cancel = !(ReferenceEquals(e.BaseXValue, "2013") ||
ReferenceEquals(e.BaseXValue, "2014") ||
ReferenceEquals(e.BaseXValue, "2015") ||
ReferenceEquals(e.BaseXValue, "2016"));
}
protected void RaiseDragStart(ChartDragStartEventArgs args)
{
if (DragStart != null)
{
DragStart(this, args);
}
}
private void XySegmentDraggingBase_OnDragStart(object sender, ChartDragStartEventArgs e)
{
if (AnalyticsInfo.VersionInfo.DeviceFamily != "Windows.Mobile")
{
e.Cancel = !(ReferenceEquals(e.BaseXValue, "2009") || ReferenceEquals(e.BaseXValue, "2010") ||
ReferenceEquals(e.BaseXValue, "2011") || ReferenceEquals(e.BaseXValue, "2012"));
}
else
{
e.Cancel = !(ReferenceEquals(e.BaseXValue, "2011") || ReferenceEquals(e.BaseXValue, "2012"));
}
}
internal override void ActivateDragging(Point mousePos, object element)
{
#if NETFX_CORE
Focus(FocusState.Keyboard);
#endif
KeyDown += CoreWindow_KeyDown;
double x, y, stackedValue;
FindNearestChartPoint(mousePos, out x, out y, out stackedValue);
delta = 0;
SegmentIndex = (int)(IsIndexed || ActualXValues is IList <string>?x : ((IList <double>)ActualXValues).IndexOf(x));
if (SegmentIndex < 0)
{
return;
}
var dragEventArgs = new ChartDragStartEventArgs {
BaseXValue = GetActualXValue(SegmentIndex)
};
if (EmptyPointIndexes != null)
{
var emptyPointIndex = EmptyPointIndexes[0];
for (var i = 0; i < emptyPointIndex.Count; i++)
{
if (SegmentIndex == emptyPointIndex[i])
{
dragEventArgs.EmptyPoint = true;
break;
}
}
}
RaiseDragStart(dragEventArgs);
if (dragEventArgs.Cancel)
{
ResetDraggingElements("Cancel", true);
SegmentIndex = -1;
return;
}
var eumerator = Area.Behaviors.OfType <ChartZoomPanBehavior>();
foreach (var behavior in eumerator)
{
behavior.InternalEnablePanning = false;
behavior.InternalEnableSelectionZooming = false;
}
}
private void ActivateDragging(Point mousePos, object element)
{
try
{
if (previewRect != null)
{
return;
}
var rectangle = element as Rectangle;
if (rectangle == null || !EnableSegmentDragging)
{
return;
}
var rangeColumnSegment = rectangle.Tag as RangeColumnSegment;
if (rangeColumnSegment == null)
{
return;
}
initialHeight = Canvas.GetTop(rectangle);
var brush = rectangle.Fill as SolidColorBrush;
previewRect = new Rectangle
{
Fill = brush != null
? new SolidColorBrush(
Color.FromArgb(
brush.Color.A,
(byte)(brush.Color.R * 0.6),
(byte)(brush.Color.G * 0.6),
(byte)(brush.Color.B * 0.6)))
: rectangle.Fill,
Opacity = 0.5,
Stroke = rectangle.Stroke,
StrokeThickness = rectangle.StrokeThickness
};
previewRect.SetValue(Canvas.LeftProperty, Canvas.GetLeft(rectangle));
previewRect.SetValue(Canvas.TopProperty, initialHeight);
previewRect.Height = rectangle.ActualHeight;
previewRect.Width = rectangle.ActualWidth;
SeriesPanel.Children.Add(previewRect);
SegmentIndex = Segments.IndexOf(rectangle.Tag as ChartSegment);
draggingMode = GetSegmentMousePosition(rangeColumnSegment, mousePos);
selectedSegment = rangeColumnSegment;
initialHeight = IsActualTransposed ? mousePos.X : mousePos.Y;
initialValue = Area.PointToValue(ActualYAxis, mousePos);
var dragEventArgs = new ChartDragStartEventArgs
{
BaseXValue = GetActualXValue(SegmentIndex)
};
RaiseDragStart(dragEventArgs);
if (dragEventArgs.Cancel)
{
ResetDraggingElements("Cancel", true);
}
#if NETFX_CORE
Focus(FocusState.Keyboard);
#endif
UnHoldPanning(false);
}
catch
{
ResetDraggingElements("Exception", true);
}
}
