/// <summary>
/// Draws the X Axis labels, returns the height required to fit all the labels.
/// </summary>
/// <param name="dc"></param>
/// <param name="scaleY"></param>
/// <param name="labels"></param>
/// <param name="offset"></param>
/// <returns></returns>
private double DrawXAxisLabels(DrawingContext dc, double scaleX, IEnumerable <GridLabel> labels, double offset)
{
// A list of areas on the label area on which we've already rendered text.
// If we go to render text on a area that's already used, then go to the next
// area and move out one width
List <List <Range <double> > > usedDrawingAreas = new List <List <Range <double> > >();
usedDrawingAreas.Add(new List <Range <double> >());
List <double> maxHeights = new List <double>();
maxHeights.Add(0);
// First of all work out all of the render positions on the y axis
List <LabelAndPos> labelAndPos = new List <LabelAndPos>();
foreach (var gridLabel in labels)
{
double xValue = gridLabel.IsFloating ? (MinPoint.X + MaxPoint.X) * 0.5 : gridLabel.Location;
if (!RangeX.Contains(xValue))
{
continue;
}
double xPos = (-xValue + MinPoint.X) * scaleX + this.ActualWidth;
int labelIndex = 0;
FormattedText formattedText = GetText(gridLabel.Text, gridLabel.Brush);
UnrestrictedSize labelArea;
if (gridLabel.Orientation == Orientation.Vertical)
{
labelArea = new UnrestrictedSize(formattedText.Height, formattedText.Width);
}
else
{
labelArea = new UnrestrictedSize(formattedText.Width, formattedText.Height);
}
Point textPoint = new Point(xPos - labelArea.Width * 0.5 - 1, offset);
textPoint.X = Math.Min(textPoint.X, this.ActualWidth - Math.Max(0, labelArea.Width * 0.5));
// Uncomment this line to stop any labels going below the bottom chart line
//textPoint.X = Math.Max(textPoint.X, 0);
Range <double> range = new Range <double>(textPoint.X, textPoint.X + labelArea.Width);
bool intersects;
do
{
intersects = false;
foreach (var usedRange in usedDrawingAreas[labelIndex])
{
if (range.Intersects(usedRange))
{
intersects = true;
labelIndex++;
if (usedDrawingAreas.Count <= labelIndex)
{
usedDrawingAreas.Add(new List <Range <double> >());
maxHeights.Add(0);
}
break;
}
}
} while(intersects);
usedDrawingAreas[labelIndex].Add(range);
maxHeights[labelIndex] = Math.Max(maxHeights[labelIndex], labelArea.Height);
labelAndPos.Add(new LabelAndPos(formattedText, textPoint, labelIndex, gridLabel.Orientation));
}
List <double> labelOffsets = new List <double>();
labelOffsets.Add(0);
double labelOffset = -2;
foreach (double height in maxHeights)
{
labelOffset += 2 + height;
labelOffsets.Add(labelOffset);
}
foreach (var gridLabel in labelAndPos)
{
FormattedText formattedText = gridLabel.Text;
Point textPoint = gridLabel.Location;
textPoint.X -= labelOffsets[gridLabel.Layer];
if (gridLabel.Orientation == Orientation.Vertical)
{
RotateTransform rotateTransform = new RotateTransform(-90);
dc.PushTransform(rotateTransform);
textPoint = rotateTransform.Inverse.Transform(textPoint);
dc.DrawText(formattedText, textPoint);
dc.Pop();
}
else
{
dc.DrawText(formattedText, textPoint);
}
}
double totalMaxHeight = -2;
foreach (var maxHeight in maxHeights)
{
totalMaxHeight += maxHeight + 2;
}
return(totalMaxHeight);
}
/// <summary>
/// Draws the X Axis labels, returns the height required to fit all the labels.
/// </summary>
/// <param name="dc"></param>
/// <param name="scaleY"></param>
/// <param name="labels"></param>
/// <param name="offset"></param>
/// <returns></returns>
private double DrawXAxisLabels(DrawingContext dc, double scaleX, IEnumerable<GridLabel> labels, double offset) {
// A list of areas on the label area on which we've already rendered text.
// If we go to render text on a area that's already used, then go to the next
// area and move out one width
List<List<Range<double>>> usedDrawingAreas = new List<List<Range<double>>>();
usedDrawingAreas.Add(new List<Range<double>>());
List<double> maxHeights = new List<double>();
maxHeights.Add(0);
// First of all work out all of the render positions on the y axis
List<LabelAndPos> labelAndPos = new List<LabelAndPos>();
foreach(var gridLabel in labels) {
double xValue = gridLabel.IsFloating ? (MinPoint.X + MaxPoint.X) * 0.5 : gridLabel.Location;
if(!RangeX.Contains(xValue)) {
continue;
}
double xPos = (-xValue + MinPoint.X) * scaleX + this.ActualWidth;
int labelIndex = 0;
FormattedText formattedText = GetText(gridLabel.Text, gridLabel.Brush);
UnrestrictedSize labelArea;
if(gridLabel.Orientation == Orientation.Vertical) {
labelArea = new UnrestrictedSize(formattedText.Height, formattedText.Width);
} else {
labelArea = new UnrestrictedSize(formattedText.Width, formattedText.Height);
}
Point textPoint = new Point(xPos - labelArea.Width * 0.5 - 1 , offset);
textPoint.X = Math.Min(textPoint.X, this.ActualWidth - Math.Max(0, labelArea.Width * 0.5));
// Uncomment this line to stop any labels going below the bottom chart line
//textPoint.X = Math.Max(textPoint.X, 0);
Range<double> range = new Range<double>(textPoint.X, textPoint.X + labelArea.Width);
bool intersects;
do {
intersects = false;
foreach(var usedRange in usedDrawingAreas[labelIndex]) {
if(range.Intersects(usedRange)) {
intersects = true;
labelIndex++;
if(usedDrawingAreas.Count <= labelIndex) {
usedDrawingAreas.Add(new List<Range<double>>());
maxHeights.Add(0);
}
break;
}
}
} while(intersects);
usedDrawingAreas[labelIndex].Add(range);
maxHeights[labelIndex] = Math.Max(maxHeights[labelIndex], labelArea.Height);
labelAndPos.Add(new LabelAndPos(formattedText, textPoint, labelIndex, gridLabel.Orientation));
}
List<double> labelOffsets = new List<double>();
labelOffsets.Add(0);
double labelOffset = -2;
foreach(double height in maxHeights) {
labelOffset += 2 + height;
labelOffsets.Add(labelOffset);
}
foreach(var gridLabel in labelAndPos) {
FormattedText formattedText = gridLabel.Text;
Point textPoint = gridLabel.Location;
textPoint.X -= labelOffsets[gridLabel.Layer];
if(gridLabel.Orientation == Orientation.Vertical) {
RotateTransform rotateTransform = new RotateTransform(-90);
dc.PushTransform(rotateTransform);
textPoint = rotateTransform.Inverse.Transform(textPoint);
dc.DrawText(formattedText, textPoint);
dc.Pop();
} else {
dc.DrawText(formattedText, textPoint);
}
}
double totalMaxHeight = -2;
foreach(var maxHeight in maxHeights) {
totalMaxHeight += maxHeight + 2;
}
return totalMaxHeight;
}