// 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);
}
//
// Draw the differences between the track lines
//
void drawTrackDiff(XYChart c, Dictionary <string, double> log0, Dictionary <string, double> log1)
{
double x0, x1;
if (!((null != log0) && log0.TryGetValue("x", out x0) && (null != log1) && log1.TryGetValue("x", out x1)))
{
return;
}
// Two columns in the table
var leftCol = new System.Text.StringBuilder();
var rightCol = new System.Text.StringBuilder();
leftCol.Append("Change in x: ");
rightCol.Append(c.formatValue(x1 - x0, "{value|2}"));
// Iterate through all layers to draw the data labels
for (int i = 0; i < c.getLayerCount(); ++i)
{
Layer layer = c.getLayerByZ(i);
// Iterate through all the data sets in the layer
for (int j = 0; j < layer.getDataSetCount(); ++j)
{
var dataSetName = layer.getDataSet(j).getDataName();
double v0, v1;
if (!(log0.TryGetValue(dataSetName, out v0) && log1.TryGetValue(dataSetName, out v1)))
{
continue;
}
leftCol.Append("\nChange in ").Append(dataSetName).Append(": ");
rightCol.Append("\n").Append(c.formatValue(v1 - v0, "{value|2}"));
}
}
string table = "<*block,bgColor=80ffffff,margin=4*><*block*>" + leftCol.ToString() +
"<*/*><*block,halign=right*>" + rightCol.ToString() + "<*/*><*/*>";
TTFText t = c.getDrawArea().text(table, "Arial", 10);
t.draw(c.getPlotArea().getRightX() - t.getWidth(), c.getPlotArea().getTopY(), 0x000000);
}
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 box with legend
//
private void trackBoxLegend(XYChart c, int mouseX, int mouseY)
{
// 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
double xValue = c.getNearestXValue(mouseX);
// Compute the position of the box. This example assumes a label based x-axis, in which the
// labeling spacing is one x-axis unit. So the left and right sides of the box is 0.5 unit from
// the central x-value.
int boxLeft = c.getXCoor(xValue - 0.5);
int boxRight = c.getXCoor(xValue + 0.5);
int boxTop = plotArea.getTopY();
int boxBottom = plotArea.getBottomY();
// Draw the track box
d.rect(boxLeft, boxTop, boxRight, boxBottom, 0x000000, Chart.Transparent);
// Container to hold the legend entries
ArrayList legendEntries = new ArrayList();
// 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);
// Build the legend entry, consist of the legend icon, the name and the data value.
double dataValue = dataSet.getValue(xIndex);
if ((dataValue != Chart.NoValue) && (dataSet.getDataColor() != Chart.Transparent))
{
legendEntries.Add(dataSet.getLegendIcon() + " " + dataSet.getDataName() + ": " +
c.formatValue(dataValue, "{value|P4}"));
}
}
}
// Create the legend by joining the legend entries
if (legendEntries.Count > 0)
{
legendEntries.Reverse();
string legend = "<*block,bgColor=FFFFCC,edgeColor=000000,margin=5*><*font,underline=1*>" +
c.xAxis().getFormattedLabel(xValue) + "<*/font*><*br*>" + String.Join("<*br*>", (string[])
legendEntries.ToArray(typeof(string))) + "<*/*>";
// Display the legend at the bottom-right side of the mouse cursor, and make sure the legend
// will not go outside the chart image.
TTFText t = d.text(legend, "Arial Bold", 8);
t.draw(Math.Min(mouseX + 12, c.getWidth() - t.getWidth()), Math.Min(mouseY + 18, c.getHeight()
- t.getHeight()), 0x000000, Chart.TopLeft);
}
}
//
// 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));
}
}
}
}
//
// Draw finance chart track line with legend
//
private void trackFinance(MultiChart m, int mouseX)
{
// Clear the current dynamic layer and get the DrawArea object to draw on it.
DrawArea d = m.initDynamicLayer();
// It is possible for a FinanceChart to be empty, so we need to check for it.
if (m.getChartCount() == 0)
{
return;
}
// Get the data x-value that is nearest to the mouse
int xValue = (int)(((XYChart)m.getChart(0)).getNearestXValue(mouseX));
// Iterate the XY charts (main price chart and indicator charts) in the FinanceChart
XYChart c = null;
for (int i = 0; i < m.getChartCount(); ++i)
{
c = (XYChart)m.getChart(i);
// Variables to hold the legend entries
string ohlcLegend = "";
ArrayList legendEntries = new ArrayList();
// Iterate through all layers to find the highest data point
for (int j = 0; j < c.getLayerCount(); ++j)
{
Layer layer = c.getLayerByZ(j);
int xIndex = layer.getXIndexOf(xValue);
int dataSetCount = layer.getDataSetCount();
// In a FinanceChart, only layers showing OHLC data can have 4 data sets
if (dataSetCount == 4)
{
double highValue = layer.getDataSet(0).getValue(xIndex);
double lowValue = layer.getDataSet(1).getValue(xIndex);
double openValue = layer.getDataSet(2).getValue(xIndex);
double closeValue = layer.getDataSet(3).getValue(xIndex);
if (closeValue != Chart.NoValue)
{
// Build the OHLC legend
ohlcLegend = "Open: " + c.formatValue(openValue, "{value|P4}") + ", High: " +
c.formatValue(highValue, "{value|P4}") + ", Low: " + c.formatValue(lowValue,
"{value|P4}") + ", Close: " + c.formatValue(closeValue, "{value|P4}");
// We also draw an upward or downward triangle for up and down days and the %
// change
double lastCloseValue = layer.getDataSet(3).getValue(xIndex - 1);
if (lastCloseValue != Chart.NoValue)
{
double change = closeValue - lastCloseValue;
double percent = change * 100 / closeValue;
string symbol = ((change >= 0) ?
"<*font,color=008800*><*img=@triangle,width=8,color=008800*>" :
"<*font,color=CC0000*><*img=@invertedtriangle,width=8,color=CC0000*>");
ohlcLegend = ohlcLegend + " " + symbol + " " + c.formatValue(change,
"{value|P4}") + " (" + c.formatValue(percent, "{value|2}") + "%)<*/font*>"
;
}
// Use a <*block*> to make sure the line does not wrap within the legend entry
ohlcLegend = "<*block*>" + ohlcLegend + " <*/*>";
}
}
else
{
// Iterate through all the data sets in the layer
for (int k = 0; k < layer.getDataSetCount(); ++k)
{
ChartDirector.DataSet dataSet = layer.getDataSetByZ(k);
string name = dataSet.getDataName();
double value = dataSet.getValue(xIndex);
if ((!string.IsNullOrEmpty(name)) && (value != Chart.NoValue))
{
// In a FinanceChart, the data set name consists of the indicator name and its
// latest value. It is like "Vol: 123M" or "RSI (14): 55.34". As we are
// generating the values dynamically, we need to extract the indictor name
// out, and also the volume unit (if any).
// The unit character, if any, is the last character and must not be a digit.
string unitChar = name.Substring(name.Length - 1);
if (unitChar.CompareTo("0") >= 0 && unitChar.CompareTo("9") <= 0)
{
unitChar = "";
}
// The indicator name is the part of the name up to the colon character.
int delimiterPosition = name.IndexOf(":");
if (delimiterPosition != -1)
{
name = name.Substring(0, delimiterPosition);
}
// In a FinanceChart, if there are two data sets, it must be representing a
// range.
if (dataSetCount == 2)
{
// We show both values in the range in a single legend entry
value = layer.getDataSet(0).getValue(xIndex);
double value2 = layer.getDataSet(1).getValue(xIndex);
name = name + ": " + c.formatValue(Math.Min(value, value2), "{value|P3}")
+ " - " + c.formatValue(Math.Max(value, value2), "{value|P3}");
}
else
{
// In a FinanceChart, only the layer for volume bars has 3 data sets for
// up/down/flat days
if (dataSetCount == 3)
{
// The actual volume is the sum of the 3 data sets.
value = layer.getDataSet(0).getValue(xIndex) + layer.getDataSet(1
).getValue(xIndex) + layer.getDataSet(2).getValue(xIndex);
}
// Create the legend entry
name = name + ": " + c.formatValue(value, "{value|P3}") + unitChar;
}
// Build the legend entry, consist of a colored square box and the name (with
// the data value in it).
legendEntries.Add("<*block*><*img=@square,width=8,edgeColor=000000,color=" +
dataSet.getDataColor().ToString("x") + "*> " + name + "<*/*>");
}
}
}
}
// Get the plot area position relative to the entire FinanceChart
PlotArea plotArea = c.getPlotArea();
int plotAreaLeftX = plotArea.getLeftX() + c.getAbsOffsetX();
int plotAreaTopY = plotArea.getTopY() + c.getAbsOffsetY();
// The legend is formed by concatenating the legend entries.
legendEntries.Reverse();
string legendText = String.Join(" ", (string[])legendEntries.ToArray(typeof(string)));
// Add the date and the ohlcLegend (if any) at the beginning of the legend
legendText = "<*block,valign=top,maxWidth=" + (plotArea.getWidth() - 5) +
"*><*font=Arial Bold*>[" + c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy") +
"]<*/font*> " + ohlcLegend + legendText;
// Draw a vertical track line at the x-position
d.vline(plotAreaTopY, plotAreaTopY + plotArea.getHeight(), c.getXCoor(xValue) +
c.getAbsOffsetX(), d.dashLineColor(0x000000, 0x0101));
// Display the legend on the top of the plot area
TTFText t = d.text(legendText, "Arial", 8);
t.draw(plotAreaLeftX + 5, plotAreaTopY + 3, 0x000000, Chart.TopLeft);
}
}
