private double staticAxisMargin = 1; // px
private void CreateCommonLabels(double[] screenTicksX)
{
Size renderSize = RenderSize;
commonLabelsCanvas.Children.Clear();
UIElement[] labels = this.labels.ToArray();
double minCoordUnsorted = ToScreen(range.Min);
double maxCoordUnsorted = ToScreen(range.Max);
double minCoord = Math.Min(minCoordUnsorted, maxCoordUnsorted);
double maxCoord = Math.Max(minCoordUnsorted, maxCoordUnsorted);
double maxCoordDiff = (maxCoord - minCoord) / labels.Length / 2.0;
double minCoordToAdd = minCoord - maxCoordDiff;
double maxCoordToAdd = maxCoord + maxCoordDiff;
for (int i = 0; i < ticks.Length; i++)
{
UIElement tickLabel = labels[i];
if (tickLabel == null)
{
continue;
}
// getting real size of label
tickLabel.Measure(renderSize);
Size tickLabelSize = tickLabel.DesiredSize;
double screenX = screenTicksX[i];
double coord = screenX - getSize(tickLabelSize) / 2;
if (isStaticAxis)
{
if (Math.Abs(screenX - minCoord) < maxCoordDiff)
{
coord = screenX + staticAxisMargin;
}
else if (Math.Abs(screenX - maxCoord) < maxCoordDiff)
{
coord = screenX - getSize(tickLabelSize) - staticAxisMargin;
}
}
if (coord < minCoordToAdd || coord > maxCoordToAdd)
{
continue;
}
if (coord.IsNaN())
{
continue;
}
StackCanvas.SetCoordinate(tickLabel, coord);
commonLabelsCanvas.Children.Add(tickLabel);
}
}
private void DoDrawMayorLabels()
{
additionalLabelsCanvas.Children.Clear();
ITicksProvider <T> mayorTicksProvider = ticksProvider.MayorProvider;
if (mayorTicksProvider != null && MayorLabelProvider != null)
{
Size renderSize = RenderSize;
var mayorTicks = mayorTicksProvider.GetTicks(range, DefaultTicksProvider.DefaultTicksCount);
double[] screenCoords = mayorTicks.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(mayorTicks.Ticks.GetPairs().ToArray()[0], range);
object info = mayorTicks.Info;
MayorLabelsInfo newInfo = new MayorLabelsInfo
{
Info = info,
MayorLabelsCount = (int)Math.Ceiling(rangesRatio)
};
var newMayorTicks = new TicksInfo <T>
{
Info = newInfo,
Ticks = mayorTicks.Ticks,
TickSizes = mayorTicks.TickSizes
};
UIElement[] additionalLabels = MayorLabelProvider.CreateLabels(newMayorTicks);
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);
}
}
}
private static void OnCoordinateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
UIElement reference = d as UIElement;
if (reference != null)
{
StackCanvas parent = VisualTreeHelper.GetParent(reference) as StackCanvas;
if (parent != null)
{
parent.InvalidateArrange();
}
}
}