//
// Draw the track line with legend
//
private void crossHair(XYChart c, int mouseX, int mouseY)
{
//System.Threading.Thread.Sleep(500);
// 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();
// Draw a vertical line and a horizontal line as the cross hair
d.vline(plotArea.getTopY(), plotArea.getBottomY(), mouseX, d.dashLineColor(0x000000, 0x0101));
d.hline(plotArea.getLeftX(), plotArea.getRightX(), mouseY, d.dashLineColor(0x000000, 0x0101));
// Draw y-axis label
string label = "<*block,bgColor=FFFFDD,margin=3,edgeColor=000000*>" + c.formatValue(c.getYValue(
mouseY, c.yAxis()), "{value|P4}") + "<*/*>";
TTFText t = d.text(label, "Arial Bold", 8);
t.draw(plotArea.getLeftX() - 5, mouseY, 0x000000, Chart.Right);
// Draw x-axis label
label = "<*block,bgColor=FFFFDD,margin=3,edgeColor=000000*>" + c.formatValue(c.getXValue(mouseX),
"{value|P4}") + "<*/*>";
t = d.text(label, "Arial Bold", 8);
t.draw(mouseX, plotArea.getBottomY() + 5, 0x000000, Chart.Top);
}
//
// Draw track cursor when mouse is moving over plotarea
//
private void winChartViewer1_MouseMovePlotArea(object sender, MouseEventArgs e)
{
var viewer = (WinChartViewer)sender;
// Mouse can drag the track lines if it is in scroll mode
var mouseUsage = viewer.MouseUsage;
if (((mouseUsage != WinChartMouseUsage.ScrollOnDrag) && (mouseUsage != WinChartMouseUsage.Default)) ||
(trackLinePos.Count == 0))
{
return;
}
int mouseX = viewer.ChartMouseX;
// Check if mouse button is down
if ((MouseButtons & MouseButtons.Left) != 0)
{
// If mouse is near track line, then it is dragging the track line
if (nearestTrackLine >= 0)
{
XYChart c = (XYChart)viewer.Chart;
PlotArea p = c.getPlotArea();
// move the track line while ensuring the track line is in the plot area
trackLinePos[nearestTrackLine] =
Math.Min(p.getRightX(), Math.Max(p.getLeftX(), mouseX - nearestDistance));
// repaint the track lines
trackLineLabel(c);
viewer.updateDisplay();
}
}
else
{
// Check which track line is nearest to the mouse
nearestTrackLine = -1;
nearestDistance = 9;
for (int i = 0; i < trackLinePos.Count; ++i)
{
if (Math.Abs(mouseX - trackLinePos[i]) < Math.Abs(nearestDistance))
{
nearestTrackLine = i;
nearestDistance = mouseX - trackLinePos[i];
}
}
// If mouse is near the track line, it is used to drag the line, so disable drag to scroll.
viewer.MouseUsage = ((nearestTrackLine >= 0) ? WinChartMouseUsage.Default :
WinChartMouseUsage.ScrollOnDrag);
}
}
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);
}
}
}
}
}
