public override void RecalcLayout()
{
if (NeedRecalcLayout == true)
{
base.RecalcLayout();
_LabelPoint = null;
if (String.IsNullOrEmpty(_Text) == false)
{
if (Scale is GaugeCircularScale)
CalcCircularLabelPoint(Scale as GaugeCircularScale);
else if (Scale is GaugeLinearScale)
CalcLinearLabelPoint(Scale as GaugeLinearScale);
}
}
}
private bool CanDisplayLabel(LabelPoint labelPoint)
{
if (labelPoint.Visible == false)
return (false);
if (Scale.HasCustomLabels == true)
{
foreach (GaugeCustomLabel label in Scale.CustomLabels)
{
if (label.Visible == true)
{
if (label.Layout.Placement == Layout.Placement)
{
if (label.Value == Scale.MinValue + labelPoint.Interval)
return (false);
}
}
}
}
return (true);
}
private Color GetLabelColor(LabelPoint lp)
{
Color labelColor = Scale.GetRangeLabelColor(lp.Interval);
if (labelColor.IsEmpty == true)
labelColor = Scale.GetSectionLabelColor(lp.Interval);
if (labelColor.IsEmpty == true)
labelColor = Layout.ForeColor;
return (labelColor);
}
private SolidBrush GetLabelBrush(SolidBrush br, LabelPoint lp)
{
Color color = GetLabelColor(lp);
if (br == null || br.Color != color)
{
if (br != null)
br.Dispose();
br = new SolidBrush(color);
}
return (br);
}
private string GetLabelText(LabelPoint labelPoint)
{
double n = Scale.GetIntervalValue(labelPoint.Interval);
if (String.IsNullOrEmpty(_FormatString) == false)
{
try
{
switch (_FormatString[0])
{
case 'X':
case 'x':
return (String.Format("{0:" + _FormatString + "}", (int) n));
default:
return (String.Format("{0:" + _FormatString + "}", n));
}
}
catch
{
}
}
return (n.ToString());
}
private void CalcVerticalLabelPoints(GaugeLinearScale scale,
int n, double dpt, double labelInterval, double labelIntervalOffset)
{
double interval = (_ShowMinLabel == true ?
0 : labelIntervalOffset > 0 ? labelIntervalOffset : labelInterval);
int x = scale.ScaleBounds.X + Offset;
_LabelPoints = new LabelPoint[n];
for (int i = 0; i < n; i++)
{
_LabelPoints[i] = new LabelPoint();
if (interval + Scale.MinValue > Scale.MaxValue)
interval = Scale.MaxValue - Scale.MinValue;
int y = (scale.Reversed == true)
? (int)(Scale.Bounds.Top + dpt * interval)
: (int)(Scale.Bounds.Bottom - dpt * interval);
_LabelPoints[i].Point = new Point(x, y);
_LabelPoints[i].Interval = interval;
if (interval >= labelIntervalOffset)
interval += labelInterval;
else
interval = labelIntervalOffset;
}
}
private void CalcCircularLabelPoints(GaugeCircularScale scale)
{
double labelInterval = (_Interval.Equals(double.NaN) ?
scale.MajorTickMarks.Interval : _Interval);
double labelIntervalOffset = (_IntervalOffset.Equals(double.NaN) ?
scale.MajorTickMarks.IntervalOffset : _IntervalOffset);
double spread = scale.MaxValue - scale.MinValue;
double dpt = scale.SweepAngle / spread;
int n = GetPointCount(spread, labelInterval, labelIntervalOffset);
if (n > 0)
{
double startAngle = scale.StartAngle;
double interval = (_ShowMinLabel == true ? 0 : labelIntervalOffset > 0 ? labelIntervalOffset : labelInterval);
int dir = (scale.Reversed ? -1 : 1);
if (scale.Reversed == true)
startAngle += scale.SweepAngle;
_LabelPoints = new LabelPoint[n];
for (int i = 0; i < n; i++)
{
_LabelPoints[i] = new LabelPoint();
if (interval + scale.MinValue > scale.MaxValue)
interval = scale.MaxValue - scale.MinValue;
_LabelPoints[i].Angle = (float)(startAngle + (interval * dpt) * dir);
_LabelPoints[i].Point = scale.GetPoint(Radius, _LabelPoints[i].Angle);
_LabelPoints[i].Interval = interval;
if (interval >= labelIntervalOffset)
interval += labelInterval;
else
interval = labelIntervalOffset;
}
}
else
{
_LabelPoints = null;
}
}
private void CalcCircularLabelPoint(GaugeCircularScale scale)
{
if (Radius > 0)
{
_LabelPoint = new LabelPoint();
_LabelPoint.Angle = _GaugePin.Angle;
_LabelPoint.Point = scale.GetPoint(Radius, _LabelPoint.Angle);
}
}
internal void PaintAdaptiveLabel(Graphics g,
string text, Brush br, LabelPoint lp, Font font)
{
SizeF tw = g.MeasureString(text, font);
if (Layout.Placement == DisplayPlacement.Near)
tw.Width += text.Length;
float c = (float)(Math.PI * _Radius * 2);
if (c > 0)
{
float radians = (float)GetRadians(lp.Angle);
float radOffset = (float)GetRadians((180 * tw.Width) / c);
float radCenter = radians;
radians -= radOffset;
bool flip = false;
if (_Layout.AutoOrientLabel == true)
{
flip = ((GetDegrees(radCenter) % 360) < 180);
if (flip == true)
radians += (radOffset * 2);
}
int n = (int)Math.Ceiling((double)text.Length / 32);
for (int i = 0; i < n; i++)
{
int len = Math.Min(text.Length - (i * 32), 32);
radians = PaintAdaptiveText(g,
text.Substring(i * 32, len), br, font, radians, flip);
}
}
}
private void CalcLinearLabelPoint(GaugeLinearScale scale)
{
_LabelPoint = new LabelPoint();
if (scale.Orientation == Orientation.Horizontal)
{
_LabelPoint.Point = new Point(
_GaugePin.Bounds.X + _GaugePin.Bounds.Width / 2,
scale.ScaleBounds.Y + Offset);
}
else
{
_LabelPoint.Point = new Point(
scale.ScaleBounds.X + Offset,
_GaugePin.Bounds.Y + _GaugePin.Bounds.Height / 2);
}
}
internal void PaintNonRotatedLabel(Graphics g,
string text, Brush br, LabelPoint lp, Font font)
{
SizeF sz = g.MeasureString(text, font);
Size size = sz.ToSize();
float fontAngle = 360 - ((lp.Angle + Layout.Angle + 90) % 360);
g.TranslateTransform(lp.Point.X, lp.Point.Y);
g.RotateTransform((lp.Angle + 90) % 360);
g.TranslateTransform(0, GetRadiusDelta(size.Width, size.Height, fontAngle));
g.RotateTransform(fontAngle % 360);
g.DrawString(text, font, br,
new Point(-size.Width / 2, -size.Height / 2));
g.ResetTransform();
}
private void PaintLinearRotatedLabel(Graphics g, string text,
Brush br, LabelPoint lp, Font font, GaugeLinearScale scale)
{
SizeF sz = g.MeasureString(text, font);
Size size = sz.ToSize();
float fontAngle = Layout.Angle;
g.TranslateTransform(lp.Point.X, lp.Point.Y);
if (scale.Orientation == Orientation.Horizontal)
g.TranslateTransform(0, -GetRadiusDelta(size.Width, size.Height, fontAngle));
else
g.TranslateTransform(-GetRadiusDelta(size.Height, size.Width, fontAngle), 0);
g.RotateTransform(fontAngle % 360);
g.DrawString(text, font, br,
new Point(-size.Width / 2, -size.Height / 2));
g.ResetTransform();
}
private void PaintCircularRotatedLabel(
Graphics g, string text, Brush br, LabelPoint lp, Font font)
{
SizeF sz = g.MeasureString(text, font);
Size size = sz.ToSize();
float fontAngle = Layout.Angle;
if (Layout.AutoOrientLabel == true)
{
if (((fontAngle + lp.Angle) % 360) < 180)
fontAngle += 180;
}
g.TranslateTransform(lp.Point.X, lp.Point.Y);
g.RotateTransform((lp.Angle + 90) % 360);
g.TranslateTransform(0, GetRadiusDelta(size.Width, size.Height, fontAngle));
g.RotateTransform(fontAngle % 360);
g.DrawString(text, font, br,
new Point(-size.Width / 2, -size.Height / 2));
g.ResetTransform();
}
internal void PaintRotatedLabel(Graphics g,
string text, Brush br, LabelPoint lp, Font font)
{
if (Scale is GaugeCircularScale)
PaintCircularRotatedLabel(g, text, br, lp, font);
else if (Scale is GaugeLinearScale)
PaintLinearRotatedLabel(g, text, br, lp, font, Scale as GaugeLinearScale);
}
internal void PaintLabel(Graphics g,
string text, Brush br, LabelPoint lp, Font font)
{
if (Scale.Style == GaugeScaleStyle.Circular)
{
if (Layout.AdaptiveLabel == true)
{
PaintAdaptiveLabel(g, text, br, lp, font);
}
else
{
if (Layout.RotateLabel == true)
PaintRotatedLabel(g, text, br, lp, font);
else
PaintNonRotatedLabel(g, text, br, lp, font);
}
}
else
{
PaintRotatedLabel(g, text, br, lp, font);
}
}