ChartDirector 7.1 (.NET Edition)

Simple Zooming and Scrolling (Windows)




NOTE: This section describes Simple Zooming and Scrolling for Windows applications only. For web applications, please refer to Simple Zooming and Scrolling (Web).

NOTE: For conciseness, some of the following descriptions only mention WinChartViewer. Those descriptions apply to WPFChartViewer as well.

This sample program demonstrates simple zoomable and scrollable chart with tooltips, using mouse click and drag to control zooming and scrolling.

The main source code listing of this sample program is included at the end of this section. The code consists of the following main parts:

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\frmsimplezoomscroll.cs
using System; using System.Collections; using System.Windows.Forms; using ChartDirector; namespace CSharpChartExplorer { public partial class FrmSimpleZoomScroll : Form { // Data arrays private DateTime[] timeStamps; private double[] dataSeriesA; private double[] dataSeriesB; private double[] dataSeriesC; public FrmSimpleZoomScroll() { InitializeComponent(); } private void FrmSimpleZoomScroll_Load(object sender, EventArgs e) { // Load the data loadData(); // Initialize the WinChartViewer initChartViewer(winChartViewer1); // Trigger the ViewPortChanged event to draw the chart winChartViewer1.updateViewPort(true, true); } // // Load the data // private void loadData() { // In this example, we just use random numbers as data. RanSeries r = new RanSeries(127); timeStamps = r.getDateSeries(1827, new DateTime(2015, 1, 1), 86400); dataSeriesA = r.getSeries2(1827, 150, -10, 10); dataSeriesB = r.getSeries2(1827, 200, -10, 10); dataSeriesC = r.getSeries2(1827, 250, -8, 8); } // // Initialize the WinChartViewer // private void initChartViewer(WinChartViewer viewer) { // Set the full x range to be the duration of the data viewer.setFullRange("x", timeStamps[0], timeStamps[timeStamps.Length - 1]); // Initialize the view port to show the latest 20% of the time range viewer.ViewPortWidth = 0.2; viewer.ViewPortLeft = 1 - viewer.ViewPortWidth; // Set the maximum zoom to 10 points viewer.ZoomInWidthLimit = 10.0 / timeStamps.Length; // Initially set the mouse usage to "Pointer" mode (Drag to Scroll mode) pointerPB.Checked = true; } // // The ViewPortChanged event handler. This event occurs if the user scrolls or zooms in // or out the chart by dragging or clicking on the chart. It can also be triggered by // calling WinChartViewer.updateViewPort. // private void winChartViewer1_ViewPortChanged(object sender, WinViewPortEventArgs e) { if (e.NeedUpdateChart) drawChart(winChartViewer1); if (e.NeedUpdateImageMap) updateImageMap(winChartViewer1); } // // Draw the chart. // private void drawChart(WinChartViewer viewer) { // Get the start date and end date that are visible on the chart. DateTime viewPortStartDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft)); DateTime viewPortEndDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortRight)); // Get the array indexes that corresponds to the visible start and end dates int startIndex = (int)Math.Floor(Chart.bSearch(timeStamps, viewPortStartDate)); int endIndex = (int)Math.Ceiling(Chart.bSearch(timeStamps, viewPortEndDate)); int noOfPoints = endIndex - startIndex + 1; // Extract the part of the data array that are visible. DateTime[] viewPortTimeStamps = Chart.arraySlice(timeStamps, startIndex, noOfPoints); double[] viewPortDataSeriesA = Chart.arraySlice(dataSeriesA, startIndex, noOfPoints); double[] viewPortDataSeriesB = Chart.arraySlice(dataSeriesB, startIndex, noOfPoints); double[] viewPortDataSeriesC = Chart.arraySlice(dataSeriesC, startIndex, noOfPoints); // // At this stage, we have extracted the visible data. We can use those data to plot the chart. // //================================================================================ // Configure overall chart appearance. //================================================================================ // Create an XYChart object 600 x 300 pixels in size, with pale blue (0xf0f0ff) background, // black (000000) rounded border, 1 pixel raised effect. XYChart c = new XYChart(600, 300, 0xf0f0ff, 0, 1); c.setRoundedFrame(Chart.CColor(BackColor)); // Set the plotarea at (52, 60) and of size 520 x 205 pixels. Use white (ffffff) background. // Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set // clipping mode to clip the data lines to the plot area. c.setPlotArea(52, 60, 520, 205, 0xffffff, -1, -1, 0xcccccc, 0xcccccc); // As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping. c.setClipping(); // Add a top title to the chart using 15 pts Times New Roman Bold Italic font, with a light blue // (ccccff) background, black (000000) border, and a glass like raised effect. c.addTitle("Simple Zooming and Scrolling", "Times New Roman Bold Italic", 15 ).setBackground(0xccccff, 0x0, Chart.glassEffect()); // Add a legend box at the top of the plot area with 9pts Arial Bold font with flow layout. c.addLegend(50, 33, false, "Arial Bold", 9).setBackground(Chart.Transparent, Chart.Transparent); // Set axes width to 2 pixels c.yAxis().setWidth(2); c.xAxis().setWidth(2); // Add a title to the y-axis c.yAxis().setTitle("Price (USD)", "Arial Bold", 9); //================================================================================ // Add data to chart //================================================================================ // // In this example, we represent the data by lines. You may modify the code below to use other // representations (areas, scatter plot, etc). // // Add a line layer for the lines, using a line width of 2 pixels LineLayer layer = c.addLineLayer2(); layer.setLineWidth(2); // In this demo, we do not have too many data points. In real code, the chart may contain a lot // of data points when fully zoomed out - much more than the number of horizontal pixels in this // plot area. So it is a good idea to use fast line mode. layer.setFastLineMode(); // Now we add the 3 data series to a line layer, using the color red (ff0000), green (00cc00) // and blue (0000ff) layer.setXData(viewPortTimeStamps); layer.addDataSet(viewPortDataSeriesA, 0xff0000, "Product Alpha"); layer.addDataSet(viewPortDataSeriesB, 0x00cc00, "Product Beta"); layer.addDataSet(viewPortDataSeriesC, 0x0000ff, "Product Gamma"); //================================================================================ // Configure axis scale and labelling //================================================================================ // Set the x-axis as a date/time axis with the scale according to the view port x range. viewer.syncDateAxisWithViewPort("x", c.xAxis()); // In this demo, we rely on ChartDirector to auto-label the axis. We ask ChartDirector to ensure // the x-axis labels are at least 75 pixels apart to avoid too many labels. c.xAxis().setTickDensity(75); //================================================================================ // Output the chart //================================================================================ viewer.Chart = c; } // // Update the image map // private void updateImageMap(WinChartViewer viewer) { // Include tool tip for the chart if (winChartViewer1.ImageMap == null) { winChartViewer1.ImageMap = winChartViewer1.Chart.getHTMLImageMap("", "", "title='[{dataSetName}] {x|mmm dd, yyyy}: USD {value|2}'"); } } // // Pointer (Drag to Scroll) button event handler // private void pointerPB_CheckedChanged(object sender, EventArgs e) { if (((RadioButton)sender).Checked) winChartViewer1.MouseUsage = WinChartMouseUsage.ScrollOnDrag; } // // Zoom In button event handler // private void zoomInPB_CheckedChanged(object sender, EventArgs e) { if (((RadioButton)sender).Checked) winChartViewer1.MouseUsage = WinChartMouseUsage.ZoomIn; } // // Zoom Out button event handler // private void zoomOutPB_CheckedChanged(object sender, EventArgs e) { if (((RadioButton)sender).Checked) winChartViewer1.MouseUsage = WinChartMouseUsage.ZoomOut; } } }

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\frmsimplezoomscroll.vb
Imports ChartDirector Public Class FrmSimpleZoomScroll ' Data arrays Dim timeStamps As DateTime() Dim dataSeriesA As Double() Dim dataSeriesB As Double() Dim dataSeriesC As Double() Private Sub FrmSimpleZoomScroll_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load ' Load the data loadData() ' Initialize the WinChartViewer initChartViewer(winChartViewer1) ' Trigger the ViewPortChanged event to draw the chart winChartViewer1.updateViewPort(True, True) End Sub ' ' Load the data ' Private Sub loadData() ' In this example, we just use random numbers as data. Dim r As RanSeries = New RanSeries(127) timeStamps = r.getDateSeries(1827, New DateTime(2015, 1, 1), 86400) dataSeriesA = r.getSeries2(1827, 150, -10, 10) dataSeriesB = r.getSeries2(1827, 200, -10, 10) dataSeriesC = r.getSeries2(1827, 250, -8, 8) End Sub ' ' Initialize the WinChartViewer ' Private Sub initChartViewer(ByVal viewer As WinChartViewer) ' Set the full x range to be the duration of the data viewer.setFullRange("x", timeStamps(0), timeStamps(timeStamps.Length - 1)) ' Initialize the view port to show the latest 20% of the time range viewer.ViewPortWidth = 0.2 viewer.ViewPortLeft = 1 - viewer.ViewPortWidth ' Set the maximum zoom to 10 points viewer.ZoomInWidthLimit = 10.0 / timeStamps.Length '/ Initially set the mouse usage to "Pointer" mode (Drag to Scroll mode) pointerPB.Checked = True End Sub ' ' The ViewPortChanged event handler. This event occurs if the user scrolls or zooms in ' or out the chart by dragging or clicking on the chart. It can also be triggered by ' calling WinChartViewer.updateViewPort. ' Private Sub winChartViewer1_ViewPortChanged(ByVal sender As Object, ByVal e As WinViewPortEventArgs) _ Handles winChartViewer1.ViewPortChanged If e.NeedUpdateChart Then drawChart(winChartViewer1) End If If e.NeedUpdateImageMap Then updateImageMap(winChartViewer1) End If End Sub ' ' Draw the chart. ' Private Sub drawChart(ByVal viewer As WinChartViewer) ' Get the start date and end date that are visible on the chart. Dim viewPortStartDate As DateTime = Chart.NTime(viewer.GetValueAtViewPort("x", viewer.ViewPortLeft)) Dim viewPortEndDate As DateTime = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortRight)) ' Get the array indexes that corresponds to the visible start and end dates Dim startIndex As Integer = Math.Floor(Chart.bSearch(timeStamps, viewPortStartDate)) Dim endIndex As Integer = Math.Ceiling(Chart.bSearch(timeStamps, viewPortEndDate)) Dim noOfPoints As Integer = endIndex - startIndex + 1 ' Extract the part of the data array that are visible. Dim viewPortTimeStamps As DateTime() = Chart.arraySlice(timeStamps, startIndex, noOfPoints) Dim viewPortDataSeriesA As Double() = Chart.arraySlice(dataSeriesA, startIndex, noOfPoints) Dim viewPortDataSeriesB As Double() = Chart.arraySlice(dataSeriesB, startIndex, noOfPoints) Dim viewPortDataSeriesC As Double() = Chart.arraySlice(dataSeriesC, startIndex, noOfPoints) ' ' At this stage, we have extracted the visible data. We can use those data to plot the chart. ' '================================================================================ ' Configure overall chart appearance. '================================================================================ ' Create an XYChart object 600 x 300 pixels in size, with pale blue (f0f0ff) ' background, black (000000) border, 1 pixel raised effect, and with a rounded frame. Dim c As XYChart = New XYChart(600, 300, &HF0F0FF, 0, 1) c.setRoundedFrame(Chart.CColor(BackColor)) ' Set the plotarea at (52, 60) and of size 520 x 205 pixels. Use white (ffffff) background. ' Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set ' clipping mode to clip the data lines to the plot area. c.setPlotArea(52, 60, 520, 205, &HFFFFFF, -1, -1, &HCCCCCC, &HCCCCCC) ' As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping. c.setClipping() ' Add a top title to the chart using 15 pts Times New Roman Bold Italic font, with a light blue ' (ccccff) background, black (000000) border, and a glass like raised effect. c.addTitle("Simple Zooming and Scrolling", "Times New Roman Bold Italic", 15 _ ).setBackground(&HCCCCFF, &H0, Chart.glassEffect()) ' Add a legend box at the top of the plot area with 9pts Arial Bold font with flow layout. c.addLegend(50, 33, False, "Arial Bold", 9).setBackground(Chart.Transparent, Chart.Transparent) ' Set axes width to 2 pixels c.yAxis().setWidth(2) c.xAxis().setWidth(2) ' Add a title to the y-axis c.yAxis().setTitle("Price (USD)", "Arial Bold", 9) '================================================================================ ' Add data to chart '================================================================================ ' ' In this example, we represent the data by lines. You may modify the code below to use other ' representations (areas, scatter plot, etc). ' ' Add a line layer for the lines, using a line width of 2 pixels Dim layer As LineLayer = c.addLineLayer2() layer.setLineWidth(2) ' In this demo, we do not have too many data points. In real code, the chart may contain a lot ' of data points when fully zoomed out - much more than the number of horizontal pixels in this ' plot area. So it is a good idea to use fast line mode. layer.setFastLineMode() ' Now we add the 3 data series to a line layer, using the color red (ff0000), green (00cc00) ' and blue (0000ff) layer.setXData(viewPortTimeStamps) layer.addDataSet(viewPortDataSeriesA, &Hff0000, "Product Alpha") layer.addDataSet(viewPortDataSeriesB, &H00cc00, "Product Beta") layer.addDataSet(viewPortDataSeriesC, &H0000ff, "Product Gamma") '================================================================================ ' Configure axis scale and labelling '================================================================================ ' Set the x-axis as a date/time axis with the scale according to the view port x range. viewer.syncDateAxisWithViewPort("x", c.xAxis()) ' In this demo, we rely on ChartDirector to auto-label the axis. We ask ChartDirector to ensure ' the x-axis labels are at least 75 pixels apart to avoid too many labels. c.xAxis().setTickDensity(75) '================================================================================ ' Output the chart '================================================================================ viewer.Chart = c End Sub ' ' Update the image map ' Private Sub updateImageMap(ByVal viewer As WinChartViewer) ' Include tool tip for the chart If IsNothing(winChartViewer1.ImageMap) Then winChartViewer1.ImageMap = winChartViewer1.Chart.getHTMLImageMap("", "", _ "title='[{dataSetName}] {x|mmm dd, yyyy}: USD {value|2}'") End If End Sub ' ' Pointer (Drag to Scroll) button event handler ' Private Sub pointerPB_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs) _ Handles pointerPB.CheckedChanged If sender.Checked Then winChartViewer1.MouseUsage = WinChartMouseUsage.ScrollOnDrag End If End Sub ' ' Zoom In button event handler ' Private Sub zoomInPB_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs) _ Handles zoomInPB.CheckedChanged If sender.Checked Then winChartViewer1.MouseUsage = WinChartMouseUsage.ZoomIn End If End Sub ' ' Zoom Out button event handler ' Private Sub zoomOutPB_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs) _ Handles zoomOutPB.CheckedChanged If sender.Checked Then winChartViewer1.MouseUsage = WinChartMouseUsage.ZoomOut End If End Sub End Class

[WPF - XAML] NetWPFCharts\CSharpWPFCharts\SimpleZoomScrollWindow.xaml
<Window x:Class="CSharpWPFCharts.SimpleZoomScrollWindow" 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="Simple Zooming and Scrolling" SizeToContent="WidthAndHeight" ResizeMode="NoResize" Loaded="Window_Loaded"> <DockPanel> <Label Content="Advanced Software Engineering" DockPanel.Dock="Top" FontFamily="Arial" FontStyle="Italic" FontWeight="Bold" FontSize="13" Background="#FF02098D" Foreground="#FFF4FF04" HorizontalContentAlignment="Right" /> <StackPanel DockPanel.Dock="Left" Width="120" Background="#FFF0F0F0"> <RadioButton x:Name="pointerPB" Style="{StaticResource {x:Type ToggleButton}}" HorizontalContentAlignment="Left" Checked="pointerPB_Checked" > <StackPanel Orientation="Horizontal" Margin="5"> <Image Source="/icons/scroll_icon.png" Height="16" /> <TextBlock Text="Scroll" Margin="6,0,0,0" /> </StackPanel> </RadioButton> <RadioButton x:Name="zoomInPB" Style="{StaticResource {x:Type ToggleButton}}" HorizontalContentAlignment="Left" Checked="zoomInPB_Checked" > <StackPanel Orientation="Horizontal" Margin="5" > <Image Source="/icons/zoomin_icon.png" Height="16" /> <TextBlock Text="Zoom In" Margin="6,0,0,0" /> </StackPanel> </RadioButton> <RadioButton x:Name="zoomOutPB" Style="{StaticResource {x:Type ToggleButton}}" HorizontalContentAlignment="Left" Checked="zoomOutPB_Checked"> <StackPanel Orientation="Horizontal" Margin="5" > <Image Source="/icons/zoomout_icon.png" Height="16" /> <TextBlock Text="Zoom Out" Margin="6,0,0,0" /> </StackPanel> </RadioButton> </StackPanel> <ChartDirector:WPFChartViewer x:Name="WPFChartViewer1" Width="600" Height="300" Margin="5" ViewPortChanged="WPFChartViewer1_ViewPortChanged" /> </DockPanel> </Window>

[WPF - C#] NetWPFCharts\CSharpWPFCharts\SimpleZoomScrollWindow.xaml.cs
using System; using System.Windows; using ChartDirector; namespace CSharpWPFCharts { public partial class SimpleZoomScrollWindow : Window { // Data arrays private DateTime[] timeStamps; private double[] dataSeriesA; private double[] dataSeriesB; private double[] dataSeriesC; public SimpleZoomScrollWindow() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { // Load the data loadData(); // Initialize the WinChartViewer initChartViewer(WPFChartViewer1); // Trigger the ViewPortChanged event to draw the chart WPFChartViewer1.updateViewPort(true, true); } // // Load the data // private void loadData() { // In this example, we just use random numbers as data. RanSeries r = new RanSeries(127); timeStamps = r.getDateSeries(1827, new DateTime(2015, 1, 1), 86400); dataSeriesA = r.getSeries2(1827, 150, -10, 10); dataSeriesB = r.getSeries2(1827, 200, -10, 10); dataSeriesC = r.getSeries2(1827, 250, -8, 8); } // // Initialize the WinChartViewer // private void initChartViewer(WPFChartViewer viewer) { // Set the full x range to be the duration of the data viewer.setFullRange("x", timeStamps[0], timeStamps[timeStamps.Length - 1]); // Initialize the view port to show the latest 20% of the time range viewer.ViewPortWidth = 0.2; viewer.ViewPortLeft = 1 - viewer.ViewPortWidth; // Set the maximum zoom to 10 points viewer.ZoomInWidthLimit = 10.0 / timeStamps.Length; // Enable mouse wheel zooming by setting the zoom ratio to 1.1 per wheel event viewer.MouseWheelZoomRatio = 1.1; // Initially set the mouse usage to "Pointer" mode (Drag to Scroll mode) pointerPB.IsChecked = true; } // // The ViewPortChanged event handler. This event occurs if the user scrolls or zooms in // or out the chart by dragging or clicking on the chart. It can also be triggered by // calling WinChartViewer.updateViewPort. // private void WPFChartViewer1_ViewPortChanged(object sender, WPFViewPortEventArgs e) { var viewer = sender as WPFChartViewer; if (e.NeedUpdateChart) drawChart(viewer); if (e.NeedUpdateImageMap) updateImageMap(viewer); } // // Update the image map // private void updateImageMap(WPFChartViewer viewer) { // Include tool tip for the chart if (viewer.ImageMap == null) { viewer.ImageMap = viewer.Chart.getHTMLImageMap("", "", "title='[{dataSetName}] {x|mmm dd, yyyy}: USD {value|2}'"); } } // // Draw the chart. // private void drawChart(WPFChartViewer viewer) { // Get the start date and end date that are visible on the chart. DateTime viewPortStartDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft)); DateTime viewPortEndDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortRight)); // Get the array indexes that corresponds to the visible start and end dates int startIndex = (int)Math.Floor(Chart.bSearch(timeStamps, viewPortStartDate)); int endIndex = (int)Math.Ceiling(Chart.bSearch(timeStamps, viewPortEndDate)); int noOfPoints = endIndex - startIndex + 1; // Extract the part of the data array that are visible. DateTime[] viewPortTimeStamps = Chart.arraySlice(timeStamps, startIndex, noOfPoints); double[] viewPortDataSeriesA = Chart.arraySlice(dataSeriesA, startIndex, noOfPoints); double[] viewPortDataSeriesB = Chart.arraySlice(dataSeriesB, startIndex, noOfPoints); double[] viewPortDataSeriesC = Chart.arraySlice(dataSeriesC, startIndex, noOfPoints); // // At this stage, we have extracted the visible data. We can use those data to plot the chart. // //================================================================================ // Configure overall chart appearance. //================================================================================ // Create an XYChart object 600 x 300 pixels in size, with pale blue (0xf0f0ff) background, // black (000000) rounded border, 1 pixel raised effect. XYChart c = new XYChart(600, 300, 0xf0f0ff, 0, 1); c.setRoundedFrame(0xffffff); // Set the plotarea at (52, 60) and of size 520 x 205 pixels. Use white (ffffff) background. // Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set // clipping mode to clip the data lines to the plot area. c.setPlotArea(52, 60, 520, 205, 0xffffff, -1, -1, 0xcccccc, 0xcccccc); // As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping. c.setClipping(); // Add a top title to the chart using 15 pts Times New Roman Bold Italic font, with a light blue // (ccccff) background, black (000000) border, and a glass like raised effect. c.addTitle("Simple Zooming and Scrolling", "Times New Roman Bold Italic", 15 ).setBackground(0xccccff, 0x0, Chart.glassEffect()); // Add a legend box at the top of the plot area with 9pts Arial Bold font with flow layout. c.addLegend(50, 33, false, "Arial Bold", 9).setBackground(Chart.Transparent, Chart.Transparent); // Set axes width to 2 pixels c.yAxis().setWidth(2); c.xAxis().setWidth(2); // Add a title to the y-axis c.yAxis().setTitle("Price (USD)", "Arial Bold", 9); //================================================================================ // Add data to chart //================================================================================ // // In this example, we represent the data by lines. You may modify the code below to use other // representations (areas, scatter plot, etc). // // Add a line layer for the lines, using a line width of 2 pixels LineLayer layer = c.addLineLayer2(); layer.setLineWidth(2); // In this demo, we do not have too many data points. In real code, the chart may contain a lot // of data points when fully zoomed out - much more than the number of horizontal pixels in this // plot area. So it is a good idea to use fast line mode. layer.setFastLineMode(); // Now we add the 3 data series to a line layer, using the color red (ff0000), green (00cc00) // and blue (0000ff) layer.setXData(viewPortTimeStamps); layer.addDataSet(viewPortDataSeriesA, 0xff0000, "Product Alpha"); layer.addDataSet(viewPortDataSeriesB, 0x00cc00, "Product Beta"); layer.addDataSet(viewPortDataSeriesC, 0x0000ff, "Product Gamma"); //================================================================================ // Configure axis scale and labelling //================================================================================ // Set the x-axis as a date/time axis with the scale according to the view port x range. viewer.syncDateAxisWithViewPort("x", c.xAxis()); // In this demo, we rely on ChartDirector to auto-label the axis. We ask ChartDirector to ensure // the x-axis labels are at least 75 pixels apart to avoid too many labels. c.xAxis().setTickDensity(75); //================================================================================ // Output the chart //================================================================================ viewer.Chart = c; } // // Pointer (Drag to Scroll) button event handler // private void pointerPB_Checked(object sender, RoutedEventArgs e) { WPFChartViewer1.MouseUsage = WinChartMouseUsage.ScrollOnDrag; } // // Zoom In button event handler // private void zoomInPB_Checked(object sender, RoutedEventArgs e) { WPFChartViewer1.MouseUsage = WinChartMouseUsage.ZoomIn; } // // Zoom Out button event handler // private void zoomOutPB_Checked(object sender, RoutedEventArgs e) { WPFChartViewer1.MouseUsage = WinChartMouseUsage.ZoomOut; } } }