// 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 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);
}
