[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\frmtracklabel.cs
using System;
using System.Collections;
using System.Windows.Forms;
using ChartDirector;
namespace CSharpChartExplorer
{
public partial class FrmTrackLabel : Form
{
public FrmTrackLabel()
{
InitializeComponent();
}
private void FrmTrackLabel_Load(object sender, EventArgs e)
{
// Data for the chart as 3 random data series
RanSeries r = new RanSeries(127);
double[] data0 = r.getSeries(100, 100, -15, 15);
double[] data1 = r.getSeries(100, 150, -15, 15);
double[] data2 = r.getSeries(100, 200, -15, 15);
DateTime[] timeStamps = r.getDateSeries(100, new DateTime(2011, 1, 1), 86400);
// Create a XYChart object of size 640 x 400 pixels
XYChart c = new XYChart(640, 400);
// Add a title to the chart using 18pt Times New Roman Bold Italic font
c.addTitle(" Product Line Global Revenue", "Times New Roman Bold Italic", 18);
// Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels
// less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff)
// as background. Set border to transparent and grid lines to white (ffffff).
c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);
// Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
// background and border color to Transparent.
c.addLegend(50, 25, false, "Arial Bold", 10).setBackground(Chart.Transparent);
// Set axis label style to 8pt Arial Bold
c.xAxis().setLabelStyle("Arial Bold", 8);
c.yAxis().setLabelStyle("Arial Bold", 8);
// Set the axis stem to transparent
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
// Configure x-axis label format
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ", Chart.StartOfMonthFilter(
), "{value|mm}");
// Add axis title using 10pt Arial Bold Italic font
c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10);
// Add a line layer to the chart using a line width of 2 pixels.
LineLayer layer = c.addLineLayer2();
layer.setLineWidth(2);
// Add 3 data series to the line layer
layer.setXData(timeStamps);
layer.addDataSet(data0, 0xff3333, "Alpha");
layer.addDataSet(data1, 0x008800, "Beta");
layer.addDataSet(data2, 0x3333cc, "Gamma");
// Assign the chart to the WinChartViewer
winChartViewer1.Chart = c;
}
//
// Draw track cursor when mouse is moving over plotarea
//
private void winChartViewer1_MouseMovePlotArea(object sender, MouseEventArgs e)
{
WinChartViewer viewer = (WinChartViewer)sender;
trackLineLabel((XYChart)viewer.Chart, viewer.PlotAreaMouseX);
viewer.updateDisplay();
// Hide the track cursor when the mouse leaves the plot area
viewer.removeDynamicLayer("MouseLeavePlotArea");
}
//
// 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);
}
}
}
}
}
}
}
[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\frmtracklabel.vb
Imports ChartDirector
Imports System.Collections
Public Class FrmTrackLabel
Private Sub FrmTrackLabel_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Data for the chart as 3 random data series
Dim r As RanSeries = New RanSeries(127)
Dim data0() As Double = r.getSeries(100, 100, -15, 15)
Dim data1() As Double = r.getSeries(100, 150, -15, 15)
Dim data2() As Double = r.getSeries(100, 200, -15, 15)
Dim timeStamps() As Date = r.getDateSeries(100, DateSerial(2011, 1, 1), 86400)
' Create a XYChart object of size 640 x 400 pixels
Dim c As XYChart = New XYChart(640, 400)
' Add a title to the chart using 18pt Times New Roman Bold Italic font
c.addTitle(" Product Line Global Revenue", "Times New Roman Bold Italic", 18)
' Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels less
' than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff) as
' background. Set border to transparent and grid lines to white (ffffff).
c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0, _
c.getHeight() - 35, &Hf0f6ff, &Ha0c0ff), -1, Chart.Transparent, &Hffffff, &Hffffff)
' Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
' background and border color to Transparent.
c.addLegend(50, 25, False, "Arial Bold", 10).setBackground(Chart.Transparent)
' Set axis label style to 8pt Arial Bold
c.xAxis().setLabelStyle("Arial Bold", 8)
c.yAxis().setLabelStyle("Arial Bold", 8)
' Set the axis stem to transparent
c.xAxis().setColors(Chart.Transparent)
c.yAxis().setColors(Chart.Transparent)
' Configure x-axis label format
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ", Chart.StartOfMonthFilter(), _
"{value|mm}")
' Add axis title using 10pt Arial Bold Italic font
c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10)
' Add a line layer to the chart using a line width of 2 pixels.
Dim layer As LineLayer = c.addLineLayer2()
layer.setLineWidth(2)
' Add 3 data series to the line layer
layer.setXData(timeStamps)
layer.addDataSet(data0, &Hff3333, "Alpha")
layer.addDataSet(data1, &H008800, "Beta")
layer.addDataSet(data2, &H3333cc, "Gamma")
' Assign the chart to the WinChartViewer
winChartViewer1.Chart = c
End Sub
'
' Draw track cursor when mouse is moving over plotarea
'
Private Sub winChartViewer1_MouseMovePlotArea(ByVal sender As Object, _
ByVal e As System.Windows.Forms.MouseEventArgs) Handles winChartViewer1.MouseMovePlotArea
Dim viewer As WinChartViewer = sender
trackLineLabel(viewer.Chart, viewer.PlotAreaMouseX)
viewer.updateDisplay()
' Hide the track cursor when the mouse leaves the plot area
viewer.removeDynamicLayer("MouseLeavePlotArea")
End Sub
'
' Draw track line with data labels
'
Private Sub trackLineLabel(c As XYChart, mouseX As Integer)
' Clear the current dynamic layer and get the DrawArea object to draw on it.
Dim d As DrawArea = c.initDynamicLayer()
' The plot area object
Dim plotArea As PlotArea = c.getPlotArea()
' Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
Dim xValue As Double = c.getNearestXValue(mouseX)
Dim xCoor As Integer = c.getXCoor(xValue)
' Draw a vertical track line at the x-position
d.vline(plotArea.getTopY(), plotArea.getBottomY(), xCoor, d.dashLineColor(&H000000, &H0101))
' Draw a label on the x-axis to show the track line position.
Dim xlabel As String = "<*font,bgColor=000000*> " & c.xAxis().getFormattedLabel(xValue, _
"mmm dd, yyyy") & " <*/font*>"
Dim t As TTFText = d.text(xlabel, "Arial Bold", 8)
' Restrict the x-pixel position of the label to make sure it stays inside the chart image.
Dim xLabelPos As Integer = Math.Max(0, Math.Min(xCoor - t.getWidth() / 2, c.getWidth() - t.getWidth( _
)))
t.draw(xLabelPos, plotArea.getBottomY() + 6, &Hffffff)
' Iterate through all layers to draw the data labels
For i As Integer = 0 To c.getLayerCount() - 1
Dim layer As Layer = c.getLayerByZ(i)
' The data array index of the x-value
Dim xIndex As Integer = layer.getXIndexOf(xValue)
' Iterate through all the data sets in the layer
For j As Integer = 0 To layer.getDataSetCount() - 1
Dim dataSet As ChartDirector.DataSet = layer.getDataSetByZ(j)
' Get the color and position of the data label
Dim color As Integer = dataSet.getDataColor()
Dim yCoor As Integer = 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()) AndAlso (yCoor <= plotArea.getBottomY()) AndAlso (color <> _
Chart.Transparent) Then
d.circle(xCoor, yCoor, 4, 4, color, color)
Dim label As String = "<*font,bgColor=" & Hex(color) & "*> " & 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 Then
t.draw(xCoor + 5, yCoor, &Hffffff, Chart.Left)
Else
t.draw(xCoor - 5, yCoor, &Hffffff, Chart.Right)
End If
End If
Next
Next
End Sub
End Class
[WPF - XAML] NetWPFCharts\CSharpWPFCharts\TrackLabelWindow.xaml
<Window x:Class="CSharpWPFCharts.TrackLabelWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:CSharpWPFCharts"
mc:Ignorable="d"
xmlns:ChartDirector="clr-namespace:ChartDirector;assembly=netchartdir" UseLayoutRounding="True"
Title="Track Line with Data Labels" SizeToContent="WidthAndHeight" ResizeMode="NoResize" Loaded="Window_Loaded">
<Grid>
<ChartDirector:WPFChartViewer x:Name="WPFChartViewer1" Margin="5" MouseMovePlotArea="WPFChartViewer1_MouseMovePlotArea" />
</Grid>
</Window>
[WPF - C#] NetWPFCharts\CSharpWPFCharts\TrackLabelWindow.xaml.cs
using System;
using System.Collections;
using System.Windows;
using System.Windows.Input;
using ChartDirector;
namespace CSharpWPFCharts
{
public partial class TrackLabelWindow : Window
{
public TrackLabelWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
// Data for the chart as 3 random data series
RanSeries r = new RanSeries(127);
double[] data0 = r.getSeries(100, 100, -15, 15);
double[] data1 = r.getSeries(100, 150, -15, 15);
double[] data2 = r.getSeries(100, 200, -15, 15);
DateTime[] timeStamps = r.getDateSeries(100, new DateTime(2011, 1, 1), 86400);
// Create a XYChart object of size 640 x 400 pixels
XYChart c = new XYChart(640, 400);
// Add a title to the chart using 18pt Times New Roman Bold Italic font
c.addTitle(" Product Line Global Revenue", "Times New Roman Bold Italic", 18);
// Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels
// less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff)
// as background. Set border to transparent and grid lines to white (ffffff).
c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);
// Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
// background and border color to Transparent.
c.addLegend(50, 25, false, "Arial Bold", 10).setBackground(Chart.Transparent);
// Set axis label style to 8pt Arial Bold
c.xAxis().setLabelStyle("Arial Bold", 8);
c.yAxis().setLabelStyle("Arial Bold", 8);
// Set the axis stem to transparent
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
// Configure x-axis label format
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ", Chart.StartOfMonthFilter(
), "{value|mm}");
// Add axis title using 10pt Arial Bold Italic font
c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10);
// Add a line layer to the chart using a line width of 2 pixels.
LineLayer layer = c.addLineLayer2();
layer.setLineWidth(2);
// Add 3 data series to the line layer
layer.setXData(timeStamps);
layer.addDataSet(data0, 0xff3333, "Alpha");
layer.addDataSet(data1, 0x008800, "Beta");
layer.addDataSet(data2, 0x3333cc, "Gamma");
// Assign the chart to the WPFChartViewer
WPFChartViewer1.Chart = c;
}
//
// Draw track cursor when mouse is moving over plotarea
//
private void WPFChartViewer1_MouseMovePlotArea(object sender, MouseEventArgs e)
{
WPFChartViewer viewer = (WPFChartViewer)sender;
trackLineLabel((XYChart)viewer.Chart, viewer.PlotAreaMouseX);
viewer.updateDisplay();
// Hide the track cursor when the mouse leaves the plot area
viewer.removeDynamicLayer("MouseLeavePlotArea");
}
//
// 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);
}
}
}
}
}
}
}
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