private void DoDrawMajorLabels()
{
ITicksProvider <T> majorTicksProvider = ticksProvider.MajorProvider;
additionalLabelsCanvas.Children.Clear();
if (majorTicksProvider != null && majorLabelProvider != null)
{
additionalLabelsCanvas.Visibility = Visibility.Visible;
Size renderSize = RenderSize;
var majorTicks = majorTicksProvider.GetTicks(range, DefaultTicksProvider.DefaultTicksCount);
double[] screenCoords = majorTicks.Ticks.Select(tick => createDataPoint(convertToDouble(tick))).
Select(p => p.DataToScreen(transform)).Select(p => getCoordinate(p)).ToArray();
// todo this is not the best decision - when displaying, for example,
// milliseconds, it causes to create hundreds and thousands of textBlocks.
double rangesRatio = GetRangesRatio(majorTicks.Ticks.GetPairs().ToArray()[0], range);
object info = majorTicks.Info;
MajorLabelsInfo newInfo = new MajorLabelsInfo
{
Info = info,
MajorLabelsCount = (int)Math.Ceiling(rangesRatio)
};
var newMajorTicks = new TicksInfo <T>
{
Info = newInfo,
Ticks = majorTicks.Ticks,
TickSizes = majorTicks.TickSizes
};
UIElement[] additionalLabels = MajorLabelProvider.CreateLabels(newMajorTicks);
for (int i = 0; i < additionalLabels.Length; i++)
{
if (screenCoords[i].IsNaN())
{
continue;
}
UIElement tickLabel = additionalLabels[i];
tickLabel.Measure(renderSize);
StackCanvas.SetCoordinate(tickLabel, screenCoords[i]);
StackCanvas.SetEndCoordinate(tickLabel, screenCoords[i + 1]);
if (tickLabel is FrameworkElement)
{
((FrameworkElement)tickLabel).LayoutTransform = additionalLabelTransform;
}
additionalLabelsCanvas.Children.Add(tickLabel);
}
}
else
{
additionalLabelsCanvas.Visibility = Visibility.Collapsed;
}
}
private double staticAxisMargin = 1; // px
private void DoDrawCommonLabels(MajorTickInfo <double>[] screenTicksX)
{
Size renderSize = RenderSize;
commonLabelsCanvas.Children.Clear();
#if DEBUG
if (labels != null)
{
foreach (FrameworkElement item in labels)
{
if (item != null)
{
Debug.Assert(item.Parent == null);
}
}
}
#endif
double minCoordUnsorted = ToScreen(range.Min);
double maxCoordUnsorted = ToScreen(range.Max);
double minCoord = Math.Min(minCoordUnsorted, maxCoordUnsorted) - 1.5;
double maxCoord = Math.Max(minCoordUnsorted, maxCoordUnsorted) + 1.5;
double maxCoordDiff = (maxCoord - minCoord) / labels.Length / 2.0;
double minCoordToAdd = minCoord - maxCoordDiff;
double maxCoordToAdd = maxCoord + maxCoordDiff;
for (int i = 0; i < ticks.Length; i++)
{
FrameworkElement tickLabel = (FrameworkElement)labels[i];
if (tickLabel == null)
{
continue;
}
Debug.Assert(((FrameworkElement)tickLabel).Parent == null);
tickLabel.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
double screenX = screenTicksX[i].Value;
double coord = screenX;
tickLabel.HorizontalAlignment = HorizontalAlignment.Center;
tickLabel.VerticalAlignment = VerticalAlignment.Center;
if (isStaticAxis)
{
// getting real size of label
tickLabel.Measure(renderSize);
Size tickLabelSize = tickLabel.DesiredSize;
if (Math.Abs(screenX - minCoord) < maxCoordDiff)
{
coord = minCoord + staticAxisMargin;
if (placement.IsBottomOrTop())
{
tickLabel.HorizontalAlignment = HorizontalAlignment.Left;
}
else
{
tickLabel.VerticalAlignment = VerticalAlignment.Top;
}
}
else if (Math.Abs(screenX - maxCoord) < maxCoordDiff)
{
coord = maxCoord - getSize(tickLabelSize) / 2 - staticAxisMargin;
if (!placement.IsBottomOrTop())
{
tickLabel.VerticalAlignment = VerticalAlignment.Bottom;
coord = maxCoord - staticAxisMargin;
}
}
}
// label is out of visible area
if (coord < minCoord || coord > maxCoord)
{
continue;
}
if (coord.IsNaN())
{
continue;
}
StackCanvas.SetCoordinate(tickLabel, coord);
commonLabelsCanvas.Children.Add(tickLabel);
}
}