protected virtual void CreateTextMarkerGroup(Canvas gauge, double gaugeR)
{
ChartModel model = Model;
Canvas gElem = new Canvas();
gauge.Children.Add(gElem);
LookAndFeel lf = CurrentLookAndFeel;
int majorMarkerCount = YMajorGridCount;
int minorMarkerCount = YMinorGridCount;
string majorMarkerXAML = lf.GetGauageMarkerMajorXAML(),
minorMarkerXAML = lf.GetGauageMarkerMinorXAML();
string textXAML = lf.GetGauageTextXAML();
TextBlock textElem;
Canvas markerContainerCanvas = gauge.FindName("markerContainer") as Canvas;
double markerContainerR = markerContainerCanvas.Width / 2;
double minValue = model.MinYValue, maxValue = model.MaxYValue;
double x, y, angle, textMargin = 0.0;
double theta = Math.PI / 6;
for (int i = 0;
i <= majorMarkerCount; ++i, theta += (5.0 * Math.PI / 3.0) / majorMarkerCount)
{
double adjustedTheta;
if (theta < Math.PI / 2)
{
adjustedTheta = theta + 3.0 * Math.PI / 2.0;
}
else
{
adjustedTheta = theta - Math.PI / 2.0;
}
x = gaugeR - markerContainerR * (Math.Cos(adjustedTheta));
y = gaugeR - markerContainerR * (Math.Sin(adjustedTheta));
angle = adjustedTheta * 180 / Math.PI;
Path marker = XamlReader.Load(majorMarkerXAML) as Path;
TransformGroup tg = new TransformGroup();
TranslateTransform tt = new TranslateTransform();
RotateTransform rt = new RotateTransform();
tt.X = x;
tt.Y = y;
rt.Angle = angle;
tg.Children.Add(rt);
tg.Children.Add(tt);
marker.RenderTransform = tg;
gElem.Children.Add(marker);
double value = minValue + i * (maxValue - minValue) / (majorMarkerCount);
textElem = XamlReader.Load(textXAML) as TextBlock;
textElem.Text = value.ToString(Format);
if (i == 0)
{
textMargin = textElem.ActualHeight / 2;
}
x = gaugeR - (markerContainerR - textMargin) * (Math.Cos(adjustedTheta));
y = gaugeR - (markerContainerR - textMargin) * (Math.Sin(adjustedTheta));
if (theta >= 5 * Math.PI / 6 && theta <= 7 * Math.PI / 6)
{
x -= textElem.ActualWidth / 2;
}
else
{
y -= textElem.ActualHeight / 2;
if (theta < Math.PI)
{
x += 2 * _TEXT_MARGIN;
}
else
{
x -= textElem.ActualWidth + 2 * _TEXT_MARGIN;
}
}
tt = new TranslateTransform();
tt.X = x;
tt.Y = y;
textElem.RenderTransform = tt;
gElem.Children.Add(textElem);
}
theta = Math.PI / 6 + (5 * Math.PI / 3) / (majorMarkerCount * minorMarkerCount);
for (int i = (minorMarkerCount + 1);
i <= (majorMarkerCount + 1) * minorMarkerCount;
++i, theta += (5 * Math.PI / 3) / (majorMarkerCount * minorMarkerCount))
{
if (i % minorMarkerCount == 0)
{
continue;
}
double adjustedTheta;
if (theta < Math.PI / 2)
{
adjustedTheta = theta + 3 * Math.PI / 2;
}
else
{
adjustedTheta = theta - Math.PI / 2;
}
x = gaugeR - markerContainerR * (Math.Cos(adjustedTheta));
y = gaugeR - markerContainerR * (Math.Sin(adjustedTheta));
angle = adjustedTheta * 180 / Math.PI;
Path marker = XamlReader.Load(minorMarkerXAML) as Path;
TransformGroup tg = new TransformGroup();
TranslateTransform tt = new TranslateTransform();
RotateTransform rt = new RotateTransform();
tt.X = x;
tt.Y = y;
rt.Angle = angle;
tg.Children.Add(rt);
tg.Children.Add(tt);
marker.RenderTransform = tg;
gElem.Children.Add(marker);
}
}
