protected void RenderLogLabel(DrawingContext dc, double position, string text)
{
double val = Math.Log10(double.Parse(text));
var ft = new FormattedText(val.ToString(CultureInfo.CurrentCulture), CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
new Typeface(FontFamily, FontStyle, FontWeight, FontStretch), FontSize * 0.75,
Foreground);
var fpow = new FormattedText(@"10", CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
new Typeface(FontFamily, FontStyle, FontWeight, FontStretch), FontSize,
Foreground);
var wd = ft.Width + fpow.Width - 1;
var hg = ft.Height + fpow.Height - 7;
Rect rect;
var p = new Pen(Brushes.Black, 1);
var halfPenSize = p.Thickness / 2;
var pos = Math.Round(position, MidpointRounding.AwayFromZero);
dc.PushGuidelineSet(new GuidelineSet(new double[0], new[] { pos - halfPenSize }));
switch (AxisAlignment)
{
case HorizontalAlignment.Left:
rect = GetRectangleByAlignment(new Point(_tickSize + 2, pos),
new Size(wd, hg), TextAlignment);
dc.DrawLine(p, new Point(0, pos), new Point(_tickSize, pos));
break;
case HorizontalAlignment.Right:
rect = GetRectangleByAlignment(new Point(ActualWidth - (_tickSize + 2), pos),
new Size(wd, hg), TextAlignment);
dc.DrawLine(p, new Point(ActualWidth - _tickSize, pos), new Point(ActualWidth, pos));
break;
case HorizontalAlignment.Center:
case HorizontalAlignment.Stretch:
rect = GetRectangleByAlignment(new Point(ActualWidth / 2, pos),
new Size(wd, hg), TextAlignment);
dc.DrawLine(p, new Point(ActualWidth / 2 - _tickSize, pos), new Point(ActualWidth / 2 + _tickSize, pos));
break;
default:
throw new ArgumentOutOfRangeException();
}
dc.Pop();
if (!OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect)))
{
Point ftL = rect.TopRight;
ftL.X -= ft.Width;
Point fpowL = rect.BottomLeft;
fpowL.Y -= fpow.Height;
dc.DrawText(ft, ftL);
dc.DrawText(fpow, fpowL);
OccupiedLabelPlaces.Add(rect);
}
}
protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
if (Axis != null && Visibility == Visibility.Visible)
{
if (TrimSideLabels)
{
OccupiedLabelPlaces.Add(new Rect(0, 0, 1, ActualHeight));
OccupiedLabelPlaces.Add(new Rect(ActualWidth, 0, 1, ActualHeight));
}
else
{
OccupiedLabelPlaces.Clear();
}
var marks = MarkProvider.GetMarks(Axis).Select(m => new Tuple <double, FormattedText>(m.Item1,
new FormattedText(m.Item2, CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
new Typeface(FontFamily, FontStyle, FontWeight, FontStretch), FontSize,
Foreground))).ToList();
if (marks.Count > 0)
{
var maxWidth = marks.Max(m => m.Item2.Width) + LabelMargin;
foreach (var m in marks)
{
RenderLabel(drawingContext, m.Item1, m.Item2, maxWidth);
}
}
RenderAxis(drawingContext);
}
}
protected override void RenderLabel(DrawingContext dc, double position, FormattedText ft, double max)
{
var p = new Pen(Brushes.Black, 1);
Rect rect;
var halfPenSize = p.Thickness / 2;
var pos = Math.Round(position, MidpointRounding.AwayFromZero);
dc.PushGuidelineSet(new GuidelineSet(new double[0], new[] { pos - halfPenSize }));
bool drawLabel;
switch (AxisAlignment)
{
case HorizontalAlignment.Left:
rect = GetRectangleByAlignment(new Point(_tickSize + 2, pos),
new Size(ft.Width, max), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(0, pos), new Point(_tickSize, pos));
}
else
{
dc.DrawLine(p, new Point(0, pos), new Point(_tickSize / 2.0, pos));
}
break;
case HorizontalAlignment.Right:
rect = GetRectangleByAlignment(new Point(ActualWidth - (_tickSize + 2), pos),
new Size(ft.Width, max), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(ActualWidth - _tickSize, pos), new Point(ActualWidth, pos));
}
else
{
dc.DrawLine(p, new Point(ActualWidth - _tickSize / 2.0, pos), new Point(ActualWidth, pos));
}
break;
case HorizontalAlignment.Center:
case HorizontalAlignment.Stretch:
rect = GetRectangleByAlignment(new Point(ActualWidth / 2, position),
new Size(ft.Width, max), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(ActualWidth / 2 - _tickSize, pos), new Point(ActualWidth / 2 + _tickSize, pos));
}
else
{
dc.DrawLine(p, new Point(ActualWidth / 2 - _tickSize / 2.0, pos), new Point(ActualWidth / 2 + _tickSize / 2.0, pos));
}
break;
default:
throw new ArgumentOutOfRangeException();
}
dc.Pop();
if (drawLabel)
{
var hReal = ft.Height;
var hSpace = rect.Height;
double y;
if (TextAlignment == ContentAlignment.BottomLeft ||
TextAlignment == ContentAlignment.BottomCenter ||
TextAlignment == ContentAlignment.BottomRight)
{
y = rect.Y + (hReal - hSpace);
}
else if (TextAlignment == ContentAlignment.MiddleLeft ||
TextAlignment == ContentAlignment.MiddleCenter ||
TextAlignment == ContentAlignment.MiddleRight)
{
y = rect.Y + (hSpace - hReal) / 2.0;
}
else
{
y = rect.Y;
}
dc.DrawText(ft, new Point(rect.Location.X, y));
OccupiedLabelPlaces.Add(rect);
}
}
protected override void RenderLabel(DrawingContext dc, double position, FormattedText ft, double max)
{
var p = new Pen(Brushes.Black, 1);
Rect rect;
var halfPenSize = p.Thickness / 2;
var pos = Math.Round(position, MidpointRounding.AwayFromZero);
dc.PushGuidelineSet(new GuidelineSet(new[] { pos - halfPenSize }, new double[0]));
bool drawLabel;
switch (AxisAlignment)
{
case VerticalAlignment.Top:
rect = GetRectangleByAlignment(new Point(pos, _tickSize),
new Size(max, ft.Height), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(pos, 0), new Point(pos, _tickSize));
}
else
{
dc.DrawLine(p, new Point(pos, 0), new Point(pos, _tickSize / 2.0));
}
break;
case VerticalAlignment.Bottom:
rect = GetRectangleByAlignment(new Point(pos, ActualHeight - _tickSize),
new Size(max, ft.Height), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(pos, ActualHeight - _tickSize), new Point(pos, ActualHeight));
}
else
{
dc.DrawLine(p, new Point(pos, ActualHeight - _tickSize / 2.0), new Point(pos, ActualHeight));
}
break;
case VerticalAlignment.Center:
case VerticalAlignment.Stretch:
rect = GetRectangleByAlignment(new Point(pos, ActualHeight / 2),
new Size(max, ft.Height), TextAlignment);
drawLabel = !OccupiedLabelPlaces.Exists(r => r.IntersectsWith(rect));
if (drawLabel)
{
dc.DrawLine(p, new Point(pos, ActualHeight / 2 - _tickSize), new Point(pos, ActualHeight / 2 + _tickSize));
}
else
{
dc.DrawLine(p, new Point(pos, ActualHeight / 2 - _tickSize / 2.0), new Point(pos, ActualHeight / 2 + _tickSize / 2.0));
}
break;
default:
throw new ArgumentOutOfRangeException();
}
dc.Pop();
if (drawLabel)
{
var wReal = ft.Width;
var wSpace = rect.Width;
double x;
if (TextAlignment == ContentAlignment.BottomLeft ||
TextAlignment == ContentAlignment.MiddleLeft ||
TextAlignment == ContentAlignment.TopLeft)
{
x = rect.X;
}
else if (TextAlignment == ContentAlignment.BottomCenter ||
TextAlignment == ContentAlignment.MiddleCenter ||
TextAlignment == ContentAlignment.TopCenter)
{
x = rect.X + (wSpace - wReal) / 2.0;
}
else
{
x = rect.X + (wSpace - wReal);
}
dc.DrawText(ft, new Point(x, rect.Location.Y));
OccupiedLabelPlaces.Add(rect);
}
}