// draw track line with data labels
private void trackLineLabel(XYChart c, int mouseX)
{
DrawArea d = c.initDynamicLayer();
PlotArea plotArea = c.getPlotArea();
double xValue = c.getNearestXValue(mouseX);
int xCoor = c.getXCoor(xValue);
d.vline(plotArea.getTopY(), plotArea.getBottomY(), xCoor, d.dashLineColor(0x000000, 0x0101));
// container to hold the legned entries
ArrayList legendEntries = new ArrayList();
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
int xIndex = layer.getXIndexOf(xValue);
// iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
// we are only interested in visibale sets with names
string dataName = dataSet.getDataName();
int color = dataSet.getDataColor();
if ((!string.IsNullOrEmpty(dataName)) && (color != Chart.Transparent))
{
// Build the legend entry, consist of the legend icon, name and data value.
double dataValue = dataSet.getValue(xIndex);
legendEntries.Add("<*block*>" + dataSet.getLegendIcon() + " " + dataName + ": " + ((
dataValue == Chart.NoValue) ? "N/A" : c.formatValue(dataValue, "{value|P4}")) +
"<*/*>");
// Draw a track dot for data points within the plot area
int yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
d.circle(xCoor, yCoor, 4, 4, color, color);
}
}
}
}
// Create the legend by joining the legend entries
legendEntries.Reverse();
string legendText = "<*block,maxWidth=" + plotArea.getWidth() + "*><*block*><*font=Arial Bold*>["
+ c.xAxis().getFormattedLabel(xValue, "{value|P4") + "]<*/*> " + String.Join(
" ", (string[])legendEntries.ToArray(typeof(string))) + "<*/*>";
// Display the legend on the top of the plot area
TTFText t = d.text(legendText, "Arial", 8);
t.draw(plotArea.getLeftX() + 5, plotArea.getTopY() - 3, 0x000000, Chart.BottomLeft);
}
void drawTrackLine(XYChart c, int lineX, Dictionary <string, double> log)
{
// The drawarea and plotarea objects
DrawArea d = c.getDrawArea();
PlotArea plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
double xValue = c.getNearestXValue(lineX);
int xCoor = c.getXCoor(xValue);
// Draw empty track line if it is ahead of the data
if ((currentIndex <= 0) || ((xCoor < lineX) && (xValue >= chartTimeLimit)))
{
d.vline(plotArea.getTopY(), plotArea.getBottomY(), lineX, 0x888888);
return;
}
// Draw a vertical track line at the x-position
d.vline(plotArea.getTopY(), plotArea.getBottomY(), xCoor, 0x888888);
// Draw a label on the x-axis to show the track line position.
string xlabel = "<*font,bgColor=000000*> " + c.xAxis().getFormattedLabel(xValue, "nn:ss.ff") +
" <*/font*>";
TTFText t = d.text(xlabel, "Arial Bold", 10);
log["x"] = xValue;
// Restrict the x-pixel position of the label to make sure it stays inside the chart image.
int xLabelPos = Math.Max(0, Math.Min(xCoor - t.getWidth() / 2, c.getWidth() - t.getWidth()));
t.draw(xLabelPos, plotArea.getBottomY() + 6, 0xffffff);
// Iterate through all layers to draw the data labels
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
// Get the color and position of the data label
int color = dataSet.getDataColor();
int yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
// Draw a track dot with a label next to it for visible data points in the plot area
if ((yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) && (color !=
Chart.Transparent) && (!string.IsNullOrEmpty(dataSet.getDataName())))
{
d.circle(xCoor, yCoor, 4, 4, color, color);
string label = "<*font,bgColor=" + color.ToString("x") + "*> " + c.formatValue(
dataSet.getValue(xIndex), "{value|P4}") + " <*/font*>";
t = d.text(label, "Arial Bold", 10);
log[dataSet.getDataName()] = dataSet.getValue(xIndex);
// Draw the label on the right side of the dot if the mouse is on the left side the
// chart, and vice versa. This ensures the label will not go outside the chart image.
if (xCoor <= (plotArea.getLeftX() + plotArea.getRightX()) / 2)
{
t.draw(xCoor + 5, yCoor, 0xffffff, Chart.Left);
}
else
{
t.draw(xCoor - 5, yCoor, 0xffffff, Chart.Right);
}
}
}
}
}
//
// Draw track line with data labels
//
private void trackLineLabel(XYChart c, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
DrawArea d = c.initDynamicLayer();
// The plot area object
PlotArea plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
double xValue = c.getNearestXValue(mouseX);
int xCoor = c.getXCoor(xValue);
// Draw a vertical track line at the x-position
d.vline(plotArea.getTopY(), plotArea.getBottomY(), xCoor, d.dashLineColor(0x000000, 0x0101));
// Draw a label on the x-axis to show the track line position.
string xlabel = "<*font,bgColor=000000*> " + c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy") +
" <*/font*>";
TTFText t = d.text(xlabel, "Arial Bold", 8);
// Restrict the x-pixel position of the label to make sure it stays inside the chart image.
int xLabelPos = Math.Max(0, Math.Min(xCoor - t.getWidth() / 2, c.getWidth() - t.getWidth()));
t.draw(xLabelPos, plotArea.getBottomY() + 6, 0xffffff);
// Iterate through all layers to draw the data labels
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
// Get the color and position of the data label
int color = dataSet.getDataColor();
int yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
// Draw a track dot with a label next to it for visible data points in the plot area
if ((yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) && (color !=
Chart.Transparent))
{
d.circle(xCoor, yCoor, 4, 4, color, color);
string label = "<*font,bgColor=" + color.ToString("x") + "*> " + c.formatValue(
dataSet.getValue(xIndex), "{value|P4}") + " <*/font*>";
t = d.text(label, "Arial Bold", 8);
// Draw the label on the right side of the dot if the mouse is on the left side the
// chart, and vice versa. This ensures the label will not go outside the chart image.
if (xCoor <= (plotArea.getLeftX() + plotArea.getRightX()) / 2)
{
t.draw(xCoor + 5, yCoor, 0xffffff, Chart.Left);
}
else
{
t.draw(xCoor - 5, yCoor, 0xffffff, Chart.Right);
}
}
}
}
}
//
// Draw the track line with legend
//
private void trackLineLegend(XYChart c, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
DrawArea d = c.initDynamicLayer();
// The plot area object
PlotArea plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
double xValue = c.getNearestXValue(mouseX);
int xCoor = c.getXCoor(xValue);
// Draw a vertical track line at the x-position
d.vline(plotArea.getTopY(), plotArea.getBottomY(), xCoor, 0xaaaaaa);
// Container to hold the legend entries
var legendEntries = new List <string>();
// Iterate through all layers to build the legend array
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
// We are only interested in visible data sets with names
string dataName = dataSet.getDataName();
int color = dataSet.getDataColor();
if ((!string.IsNullOrEmpty(dataName)) && (color != Chart.Transparent))
{
// Build the legend entry, consist of the legend icon, name and data value.
double dataValue = dataSet.getValue(xIndex);
legendEntries.Add("<*block*>" + dataSet.getLegendIcon() + " " + dataName + ": " + ((
dataValue == Chart.NoValue) ? "N/A" : c.formatValue(dataValue, "{value|P4}")) +
"<*/*>");
// Draw a track dot for data points within the plot area
int yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
d.circle(xCoor, yCoor, 4, 4, color, color);
}
}
}
}
// Create the legend by joining the legend entries
legendEntries.Reverse();
string legendText = "<*block,maxWidth=" + plotArea.getWidth() + "*><*block*><*font=Arial Bold*>["
+ c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy") + "]<*/*> " + String.Join(
" ", legendEntries) + "<*/*>";
// Display the legend on the top of the plot area
TTFText t = d.text(legendText, "Arial Bold", 10);
t.draw(plotArea.getLeftX() + 5, plotArea.getTopY() - 3, 0x000000, Chart.BottomLeft);
}
//
// Draw track line with axis labels
//
private void trackLineAxis(XYChart c, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
DrawArea d = c.initDynamicLayer();
// The plot area object
PlotArea plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
double xValue = c.getNearestXValue(mouseX);
int xCoor = c.getXCoor(xValue);
// The vertical track line is drawn up to the highest data point (the point with smallest
// y-coordinate). We need to iterate all datasets in all layers to determine where it is.
int minY = plotArea.getBottomY();
// Iterate through all layers to find the highest data point
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
double dataPoint = dataSet.getPosition(xIndex);
if ((dataPoint != Chart.NoValue) && (dataSet.getDataColor() != Chart.Transparent))
{
minY = Math.Min(minY, c.getYCoor(dataPoint, dataSet.getUseYAxis()));
}
}
}
// Draw a vertical track line at the x-position up to the highest data point.
d.vline(Math.Max(minY, plotArea.getTopY()), plotArea.getBottomY() + 6, xCoor, d.dashLineColor(
0x000000, 0x0101));
// Draw a label on the x-axis to show the track line position
d.text("<*font,bgColor=000000*> " + c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy") +
" <*/font*>", "Arial Bold", 8).draw(xCoor, plotArea.getBottomY() + 6, 0xffffff, Chart.Top);
// Iterate through all layers to build the legend array
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// The data array index of the x-value
int xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(j);
// The positional value, axis binding, pixel coordinate and color of the data point.
double dataPoint = dataSet.getPosition(xIndex);
Axis yAxis = dataSet.getUseYAxis();
int yCoor = c.getYCoor(dataPoint, yAxis);
int color = dataSet.getDataColor();
// Draw the axis label only for visible data points of named data sets
if ((dataPoint != Chart.NoValue) && (color != Chart.Transparent) && (yCoor >=
plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
// The axis label consists of 3 parts - a track dot for the data point, an axis label,
// and a line joining the track dot to the axis label.
// Draw the line first. The end point of the line at the axis label side depends on
// whether the label is at the left or right side of the axis (that is, on whether the
// axis is on the left or right side of the plot area).
int xPos = yAxis.getX() + ((yAxis.getAlignment() == Chart.Left) ? -4 : 4);
d.hline(xCoor, xPos, yCoor, d.dashLineColor(color, 0x0101));
// Draw the track dot
d.circle(xCoor, yCoor, 4, 4, color, color);
// Draw the axis label. If the axis is on the left side of the plot area, the labels
// should right aligned to the axis, and vice versa.
d.text("<*font,bgColor=" + color.ToString("x") + "*> " + c.formatValue(dataPoint,
"{value|P4}") + " <*/font*>", "Arial Bold", 8).draw(xPos, yCoor, 0xffffff, ((
yAxis.getAlignment() == Chart.Left) ? Chart.Right : Chart.Left));
}
}
}
}
