[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\viewportcontroldemo.aspx
(Click here on how to convert this code to code-behind style.)<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>
<script runat="server">
//
// Initialize the WebChartViewer when the page is first loaded
//
private void initViewer(WebChartViewer viewer)
{
// The full x-axis range is from Jan 1, 2007 to Jan 1, 2012
DateTime startDate = new DateTime(2010, 1, 1);
DateTime endDate = new DateTime(2015, 1, 1);
viewer.setFullRange("x", startDate, endDate);
// Initialize the view port to show the last 366 days (out of 1826 days)
viewer.ViewPortWidth = 366.0 / 1826;
viewer.ViewPortLeft = 1 - viewer.ViewPortWidth;
// Set the maximum zoom to 10 days (out of 1826 days)
viewer.ZoomInWidthLimit = 10.0 / 1826;
}
//
// Create a random table for demo purpose.
//
private RanTable getRandomTable()
{
RanTable r = new RanTable(127, 4, 1828);
r.setDateCol(0, new DateTime(2010, 1, 1), 86400);
r.setCol(1, 150, -10, 10);
r.setCol(2, 200, -10, 10);
r.setCol(3, 250, -8, 8);
return r;
}
//
// Draw the chart
//
private void drawChart(WebChartViewer viewer)
{
// Determine the visible x-axis range
DateTime viewPortStartDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft));
DateTime viewPortEndDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft +
viewer.ViewPortWidth));
// We need to get the data within the visible x-axis range. In real code, this can be by using a
// database query or some other means as specific to the application. In this demo, we just
// generate a random data table, and then select the data within the table.
RanTable r = getRandomTable();
// Select the data for the visible date range viewPortStartDate to viewPortEndDate. It is
// possible there is no data point at exactly viewPortStartDate or viewPortEndDate. In this
// case, we also need the data points that are just outside the visible date range to "overdraw"
// the line a little bit (the "overdrawn" part will be clipped to the plot area) In this demo,
// we do this by adding a one day margin to the date range when selecting the data.
r.selectDate(0, viewPortStartDate.AddDays(-1), viewPortEndDate.AddDays(1));
// The selected data from the random data table
DateTime[] timeStamps = Chart.NTime(r.getCol(0));
double[] dataSeriesA = r.getCol(1);
double[] dataSeriesB = r.getCol(2);
double[] dataSeriesC = r.getCol(3);
//
// Now we have obtained the data, we can plot the chart.
//
//================================================================================
// Configure overall chart appearance.
//================================================================================
// Create an XYChart object of size 640 x 400 pixels
XYChart c = new XYChart(640, 400);
// Set the plotarea at (55, 55) with width 80 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(55, 55, c.getWidth() - 80, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);
// As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping.
c.setClipping();
// Add a title box using dark grey (0x333333) 18pt Arial Bold font
c.addTitle(" Zooming and Scrolling with Viewport Control", "Arial Bold", 15, 0x333333);
if (viewer.IsAttachmentRequest()) {
LegendBox b = c.addLegend(55, 28, false, "Arial Bold", 10);
b.setBackground(Chart.Transparent, Chart.Transparent);
b.setLineStyleKey();
}
// Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
c.yAxis().setLabelStyle("Arial", 10);
// Add axis title using 10pt Arial Bold font
c.yAxis().setTitle("Ionic Temperature (C)", "Arial Bold", 10);
//================================================================================
// Add data to chart
//================================================================================
//
// In this example, we represent the data by lines. You may modify the code below to use other
// layer types (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 (0xff3333), green
// (0x008800) and blue (0x3333cc)
layer.setXData(timeStamps);
layer.addDataSet(dataSeriesA, 0xff3333, "Alpha");
layer.addDataSet(dataSeriesB, 0x008800, "Beta");
layer.addDataSet(dataSeriesC, 0x3333cc, "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());
// For the automatic y-axis labels, set the minimum spacing to 30 pixels.
c.yAxis().setTickDensity(30);
//
// In this demo, the time range can be from a few years to a few days. We demonstrate how to set
// up different date/time format based on the time range.
//
// If all ticks are yearly aligned, then we use "yyyy" as the label format.
c.xAxis().setFormatCondition("align", 360 * 86400);
c.xAxis().setLabelFormat("{value|yyyy}");
// If all ticks are monthly aligned, then we use "mmm yyyy" in bold font as the first label of a
// year, and "mmm" for other labels.
c.xAxis().setFormatCondition("align", 30 * 86400);
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "<*font=bold*>{value|mmm<*br*>yyyy}",
Chart.AllPassFilter(), "{value|mmm}");
// If all ticks are daily algined, then we use "mmm dd<*br*>yyyy" in bold font as the first
// label of a year, and "mmm dd" in bold font as the first label of a month, and "dd" for other
// labels.
c.xAxis().setFormatCondition("align", 86400);
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(),
"<*block,halign=left*><*font=bold*>{value|mmm dd<*br*>yyyy}", Chart.StartOfMonthFilter(),
"<*font=bold*>{value|mmm dd}");
c.xAxis().setMultiFormat2(Chart.AllPassFilter(), "{value|dd}");
// For all other cases (sub-daily ticks), use "hh:nn<*br*>mmm dd" for the first label of a day,
// and "hh:nn" for other labels.
c.xAxis().setFormatCondition("else");
c.xAxis().setMultiFormat(Chart.StartOfDayFilter(), "<*font=bold*>{value|hh:nn<*br*>mmm dd}",
Chart.AllPassFilter(), "{value|hh:nn}");
//================================================================================
// Step 5 - Output the chart
//================================================================================
if (viewer.IsAttachmentRequest()) {
// Output as PDF attachment
viewer.Image = c.makeWebImage(Chart.PDF);
} else {
// Output the chart
viewer.Image = c.makeWebImage(Chart.SVG);
// Output Javascript chart model to the browser to suppport tracking cursor
viewer.ChartModel = c.getJsChartModel();
}
}
private void drawFullChart(WebViewPortControl vp, WebChartViewer viewer)
{
// We need to draw a small thumbnail chart for the full data range. The simplest method is to
// simply get the full data to draw the chart. If the full data are very large (eg. millions of
// points), for such a small thumbnail chart, it is often acceptable to just retreive a small
// sample of the data.
//
// In this example, there are only around 5500 points for the 3 data series. This amount is not
// large to ChartDirector, so we simply pass all the data to ChartDirector.
RanTable r = getRandomTable();
// Get all the data from the random table
DateTime[] timeStamps = Chart.NTime(r.getCol(0));
double[] dataSeriesA = r.getCol(1);
double[] dataSeriesB = r.getCol(2);
double[] dataSeriesC = r.getCol(3);
// Create an XYChart object of size 640 x 60 pixels
XYChart c = new XYChart(640, 60);
// Set the plotarea with the same horizontal position as that in the main chart for alignment.
// The vertical position is set to equal to the chart height.
c.setPlotArea(55, 0, c.getWidth() - 80, c.getHeight() - 1, 0xc0d8ff, -1, 0x888888,
Chart.Transparent, 0xffffff);
// Set the x axis stem to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
// Put the x-axis labels inside the plot area by setting a negative label gap. Use
// setLabelAlignment to put the label at the right side of the tick.
c.xAxis().setLabelGap(-1);
c.xAxis().setLabelAlignment(1);
// Set the y axis stem and labels to transparent (that is, hide the labels)
c.yAxis().setColors(Chart.Transparent, Chart.Transparent);
// Add a line layer for the lines with fast line mode enabled
LineLayer layer = c.addLineLayer2();
layer.setFastLineMode();
// Now we add the 3 data series to a line layer, using the color red (0xff3333), green
// (0x008800) and blue (0x3333cc)
layer.setXData(timeStamps);
layer.addDataSet(dataSeriesA, 0xff3333);
layer.addDataSet(dataSeriesB, 0x008800);
layer.addDataSet(dataSeriesC, 0x3333cc);
// The x axis scales should reflect the full range of the view port
c.xAxis().setDateScale(viewer.getValueAtViewPort("x", 0), viewer.getValueAtViewPort("x", 1));
// For the automatic x-axis labels, set the minimum spacing to 75 pixels.
c.xAxis().setTickDensity(75);
// For the auto-scaled y-axis, as we hide the labels, we can disable axis rounding. This can
// make the axis scale fit the data tighter.
c.yAxis().setRounding(false, false);
// Output the chart
vp.Image = c.makeWebImage(Chart.SVG);
}
//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
//
// This script handles both the full page request, as well as the subsequent partial updates
// (AJAX chart updates). We need to determine the type of request first before we processing it.
//
if (WebChartViewer.IsPartialUpdateRequest(Page)) {
// Is a partial update request.
// The .NET platform will not restore the states of the controls before or during Page_Load,
// so we need to restore the state ourselves
WebChartViewer1.LoadViewerState();
// Draw the chart in partial update mode
drawChart(WebChartViewer1);
// Output the chart immediately and then terminate the page life cycle (PartialUpdateChart
// will cause Page_Load to terminate immediately without running the following code).
WebChartViewer1.PartialUpdateChart();
}
//
// If the code reaches here, it is a full page request.
//
// Initialize the WebChartViewer and draw the chart.
initViewer(WebChartViewer1);
drawChart(WebChartViewer1);
// Draw a thumbnail chart representing the full range in the WebViewPortControl
drawFullChart(WebViewPortControl1, WebChartViewer1);
}
</script>
<!DOCTYPE html>
<html>
<head>
<title>Zooming and Scrolling with Viewport Control</title>
<script type="text/javascript" src="cdjcv.js"></script>
<style type="text/css">
.chartButton { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px; cursor:pointer;}
.chartButtonSpacer { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px;}
.chartButton:hover { box-shadow:inset 0px 0px 0px 2px #444488; }
.chartButtonPressed { background-color: #CCFFCC; }
</style>
</head>
<body style="margin:0px;">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
// Update the chart when the view port has changed (eg. when the user zooms in using the mouse)
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
viewer.attachHandler("ViewPortChanged", viewer.partialUpdate);
// Initialize the navigation pad
JsViewPortControl.get('<%=WebViewPortControl1.ClientID%>').setViewer(viewer);
// Draw track cursor when mouse is moving over plotarea or if the chart updates
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "PostUpdate",
"Now", "ChartMove"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
});
//
// Draw track line with legend
//
function trackLineLegend(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// The chart and its plot area
var c = viewer.getChart();
var plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = c.getXCoor(xValue);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
for (var i = 0; i < c.getLayerCount(); ++i)
{
var layer = c.getLayerByZ(i);
// The data array index of the x-value
var xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (var j = 0; j < layer.getDataSetCount(); ++j)
{
var dataSet = layer.getDataSetByZ(j);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(10, 10, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(9, 9, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "mm/dd/yyyy") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"padding:0px 0px 3px 3px; font:bold 13px Arial; -webkit-text-size-adjust:100%;");
}
//
// This method is called when the user clicks on the Pointer, Zoom In or Zoom Out buttons
//
function setMouseMode(mode)
{
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
if (mode == viewer.getMouseUsage())
mode = JsChartViewer.Default;
// Set the button color based on the selected mouse mode
document.getElementById("scrollButton").className = "chartButton" +
((mode == JsChartViewer.Scroll) ? " chartButtonPressed" : "");
document.getElementById("zoomInButton").className = "chartButton" +
((mode == JsChartViewer.ZoomIn) ? " chartButtonPressed" : "");
document.getElementById("zoomOutButton").className = "chartButton" +
((mode == JsChartViewer.ZoomOut) ? " chartButtonPressed" : "");
// Set the mouse mode
viewer.setMouseUsage(mode);
}
//
// This method is called when the user clicks on the buttons that selects the last NN days
//
function setTimeRange(duration)
{
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
// Set the view port width to represent the required duration (as a ratio to the total x-range)
viewer.setViewPortWidth(Math.min(1,
duration / (viewer.getValueAtViewPort("x", 1) - viewer.getValueAtViewPort("x", 0))));
// Set the view port left so that the view port is moved to show the latest data
viewer.setViewPortLeft(1 - viewer.getViewPortWidth());
// Trigger a view port change event
viewer.raiseViewPortChangedEvent();
}
</script>
<form method="post" id="ZoomScrollTrack" runat="server">
<table cellspacing="0" cellpadding="0" style="border:black 1px solid;">
<tr>
<td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
<a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
Advanced Software Engineering
</a>
</td>
</tr>
<tr valign="top">
<td style="width:130px; background:#c0c0ff;">
<div style="width:130px">
<!-- The following table is to create 3 cells for 3 buttons to control the mouse usage mode. -->
<table style="width:100%; padding:0px; border:0px; border-spacing:0px;">
<tr>
<td class="chartButton" id="scrollButton" onclick="setMouseMode(JsChartViewer.Scroll)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="scrollew.gif" style="vertical-align:middle" alt="Drag" /> Drag to Scroll
</td>
</tr>
<tr>
<td class="chartButton" id="zoomInButton" onclick="setMouseMode(JsChartViewer.ZoomIn)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="zoomInIcon.gif" style="vertical-align:middle" alt="Zoom In" /> Zoom In
</td>
</tr>
<tr>
<td class="chartButton" id="zoomOutButton" onclick="setMouseMode(JsChartViewer.ZoomOut)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="zoomOutIcon.gif" style="vertical-align:middle" alt="Zoom Out" /> Zoom Out
</td>
</tr>
<tr>
<td class="chartButtonSpacer">
<div style="padding:2px"> </div>
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(30 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last 30 days" /> Last 30 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(90 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last 90 days" /> Last 90 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(366 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last Year" /> Last Year
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(1E15);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="All Time" /> All Time
</td>
</tr>
</table>
<br />
<br />
<br />
<br />
<div style="text-align:center;">
<input type="button" value="Download PDF" style="font:13px Arial; width:124px;"
onclick="JsChartViewer.get('<%=WebChartViewer1.ClientID%>').partialUpdateAsAttachment();" />
</div>
</div>
</td>
<td style="border-left:black 1px solid; padding:10px 5px 10px 5px;">
<!-- ****** Here is the chart image ****** -->
<chart:WebChartViewer id="WebChartViewer1" runat="server" /><br />
<!-- ****** Here is the view port control ****** -->
<chart:WebViewPortControl id="WebViewPortControl1" runat="server" />
</td>
</tr>
</table>
</form>
</body>
</html>
[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\viewportcontroldemo.aspx
(Click here on how to convert this code to code-behind style.)<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>
<script runat="server">
'
' Initialize the WebChartViewer when the page is first loaded
'
Private Sub initViewer(viewer As WebChartViewer)
' The full x-axis range is from Jan 1, 2007 to Jan 1, 2012
Dim startDate As Date = DateSerial(2010, 1, 1)
Dim endDate As Date = DateSerial(2015, 1, 1)
viewer.setFullRange("x", startDate, endDate)
' Initialize the view port to show the last 366 days (out of 1826 days)
viewer.ViewPortWidth = 366.0 / 1826
viewer.ViewPortLeft = 1 - viewer.ViewPortWidth
' Set the maximum zoom to 10 days (out of 1826 days)
viewer.ZoomInWidthLimit = 10.0 / 1826
End Sub
'
' Create a random table for demo purpose.
'
Private Function getRandomTable() As RanTable
Dim r As RanTable = New RanTable(127, 4, 1828)
r.setDateCol(0, DateSerial(2010, 1, 1), 86400)
r.setCol(1, 150, -10, 10)
r.setCol(2, 200, -10, 10)
r.setCol(3, 250, -8, 8)
Return r
End Function
'
' Draw the chart
'
Private Sub drawChart(viewer As WebChartViewer)
' Determine the visible x-axis range
Dim viewPortStartDate As Date = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft))
Dim viewPortEndDate As Date = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft + _
viewer.ViewPortWidth))
' We need to get the data within the visible x-axis range. In real code, this can be by using a
' database query or some other means as specific to the application. In this demo, we just
' generate a random data table, and then select the data within the table.
Dim r As RanTable = getRandomTable()
' Select the data for the visible date range viewPortStartDate to viewPortEndDate. It is
' possible there is no data point at exactly viewPortStartDate or viewPortEndDate. In this case,
' we also need the data points that are just outside the visible date range to "overdraw" the
' line a little bit (the "overdrawn" part will be clipped to the plot area) In this demo, we do
' this by adding a one day margin to the date range when selecting the data.
r.selectDate(0, viewPortStartDate.AddDays(-1), viewPortEndDate.AddDays(1))
' The selected data from the random data table
Dim timeStamps() As Date = Chart.NTime(r.getCol(0))
Dim dataSeriesA() As Double = r.getCol(1)
Dim dataSeriesB() As Double = r.getCol(2)
Dim dataSeriesC() As Double = r.getCol(3)
'
' Now we have obtained the data, we can plot the chart.
'
'================================================================================
' Configure overall chart appearance.
'================================================================================
' Create an XYChart object of size 640 x 400 pixels
Dim c As XYChart = New XYChart(640, 400)
' Set the plotarea at (55, 55) with width 80 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(55, 55, c.getWidth() - 80, c.getHeight() - 90, c.linearGradientColor(0, 55, 0, _
c.getHeight() - 35, &Hf0f6ff, &Ha0c0ff), -1, Chart.Transparent, &Hffffff, &Hffffff)
' As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping.
c.setClipping()
' Add a title box using dark grey (0x333333) 18pt Arial Bold font
c.addTitle(" Zooming and Scrolling with Viewport Control", "Arial Bold", 15, &H333333)
If viewer.IsAttachmentRequest() Then
Dim b As LegendBox = c.addLegend(55, 28, False, "Arial Bold", 10)
b.setBackground(Chart.Transparent, Chart.Transparent)
b.setLineStyleKey()
End If
' Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent)
c.yAxis().setColors(Chart.Transparent)
c.xAxis().setLabelStyle("Arial", 10)
c.yAxis().setLabelStyle("Arial", 10)
' Add axis title using 10pt Arial Bold font
c.yAxis().setTitle("Ionic Temperature (C)", "Arial Bold", 10)
'================================================================================
' Add data to chart
'================================================================================
'
' In this example, we represent the data by lines. You may modify the code below to use other
' layer types (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 (0xff3333), green (0x008800)
' and blue (0x3333cc)
layer.setXData(timeStamps)
layer.addDataSet(dataSeriesA, &Hff3333, "Alpha")
layer.addDataSet(dataSeriesB, &H008800, "Beta")
layer.addDataSet(dataSeriesC, &H3333cc, "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())
' For the automatic y-axis labels, set the minimum spacing to 30 pixels.
c.yAxis().setTickDensity(30)
'
' In this demo, the time range can be from a few years to a few days. We demonstrate how to set
' up different date/time format based on the time range.
'
' If all ticks are yearly aligned, then we use "yyyy" as the label format.
c.xAxis().setFormatCondition("align", 360 * 86400)
c.xAxis().setLabelFormat("{value|yyyy}")
' If all ticks are monthly aligned, then we use "mmm yyyy" in bold font as the first label of a
' year, and "mmm" for other labels.
c.xAxis().setFormatCondition("align", 30 * 86400)
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "<*font=bold*>{value|mmm<*br*>yyyy}", _
Chart.AllPassFilter(), "{value|mmm}")
' If all ticks are daily algined, then we use "mmm dd<*br*>yyyy" in bold font as the first label
' of a year, and "mmm dd" in bold font as the first label of a month, and "dd" for other labels.
c.xAxis().setFormatCondition("align", 86400)
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), _
"<*block,halign=left*><*font=bold*>{value|mmm dd<*br*>yyyy}", Chart.StartOfMonthFilter(), _
"<*font=bold*>{value|mmm dd}")
c.xAxis().setMultiFormat2(Chart.AllPassFilter(), "{value|dd}")
' For all other cases (sub-daily ticks), use "hh:nn<*br*>mmm dd" for the first label of a day,
' and "hh:nn" for other labels.
c.xAxis().setFormatCondition("else")
c.xAxis().setMultiFormat(Chart.StartOfDayFilter(), "<*font=bold*>{value|hh:nn<*br*>mmm dd}", _
Chart.AllPassFilter(), "{value|hh:nn}")
'================================================================================
' Step 5 - Output the chart
'================================================================================
If viewer.IsAttachmentRequest() Then
' Output as PDF attachment
viewer.Image = c.makeWebImage(Chart.PDF)
Else
' Output the chart
viewer.Image = c.makeWebImage(Chart.SVG)
' Output Javascript chart model to the browser to suppport tracking cursor
WebChartViewer1.ChartModel = c.getJsChartModel()
End If
End Sub
Private Sub drawFullChart(vp As WebViewPortControl, viewer As WebChartViewer)
' We need to draw a small thumbnail chart for the full data range. The simplest method is to
' simply get the full data to draw the chart. If the full data are very large (eg. millions of
' points), for such a small thumbnail chart, it is often acceptable to just retreive a small
' sample of the data.
'
' In this example, there are only around 5500 points for the 3 data series. This amount is not
' large to ChartDirector, so we simply pass all the data to ChartDirector.
Dim r As RanTable = getRandomTable()
' Get all the data from the random table
Dim timeStamps() As Date = Chart.NTime(r.getCol(0))
Dim dataSeriesA() As Double = r.getCol(1)
Dim dataSeriesB() As Double = r.getCol(2)
Dim dataSeriesC() As Double = r.getCol(3)
' Create an XYChart object of size 640 x 60 pixels
Dim c As XYChart = New XYChart(640, 60)
' Set the plotarea with the same horizontal position as that in the main chart for alignment.
' The vertical position is set to equal to the chart height.
c.setPlotArea(55, 0, c.getWidth() - 80, c.getHeight() - 1, &Hc0d8ff, -1, &H888888, _
Chart.Transparent, &Hffffff)
' Set the x axis stem to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent)
c.xAxis().setLabelStyle("Arial", 10)
' Put the x-axis labels inside the plot area by setting a negative label gap. Use
' setLabelAlignment to put the label at the right side of the tick.
c.xAxis().setLabelGap(-1)
c.xAxis().setLabelAlignment(1)
' Set the y axis stem and labels to transparent (that is, hide the labels)
c.yAxis().setColors(Chart.Transparent, Chart.Transparent)
' Add a line layer for the lines with fast line mode enabled
Dim layer As LineLayer = c.addLineLayer2()
layer.setFastLineMode()
' Now we add the 3 data series to a line layer, using the color red (0xff3333), green (0x008800)
' and blue (0x3333cc)
layer.setXData(timeStamps)
layer.addDataSet(dataSeriesA, &Hff3333)
layer.addDataSet(dataSeriesB, &H008800)
layer.addDataSet(dataSeriesC, &H3333cc)
' The x axis scales should reflect the full range of the view port
c.xAxis().setDateScale(viewer.getValueAtViewPort("x", 0), viewer.getValueAtViewPort("x", 1))
' For the automatic x-axis labels, set the minimum spacing to 75 pixels.
c.xAxis().setTickDensity(75)
' For the auto-scaled y-axis, as we hide the labels, we can disable axis rounding. This can make
' the axis scale fit the data tighter.
c.yAxis().setRounding(False, False)
' Output the chart
vp.Image = c.makeWebImage(Chart.SVG)
End Sub
'
' Page Load event handler
'
Private Sub Page_Load(sender As System.Object, e As System.EventArgs)
'
' This script handles both the full page request, as well as the subsequent partial updates
' (AJAX chart updates). We need to determine the type of request first before we processing it.
'
If WebChartViewer.IsPartialUpdateRequest(Page) Then
' Is a partial update request.
' The .NET platform will not restore the states of the controls before or during Page_Load,
' so we need to restore the state ourselves
WebChartViewer1.LoadViewerState()
' Draw the chart in partial update mode
drawChart(WebChartViewer1)
' Output the chart immediately and then terminate the page life cycle (PartialUpdateChart
' will cause Page_Load to terminate immediately without running the following code).
WebChartViewer1.PartialUpdateChart()
End If
'
' If the code reaches here, it is a full page request.
'
' Initialize the WebChartViewer and draw the chart.
initViewer(WebChartViewer1)
drawChart(WebChartViewer1)
' Draw a thumbnail chart representing the full range in the WebViewPortControl
drawFullChart(WebViewPortControl1, WebChartViewer1)
End Sub
</script>
<!DOCTYPE html>
<html>
<head>
<title>Zooming and Scrolling with Viewport Control</title>
<script type="text/javascript" src="cdjcv.js"></script>
<style type="text/css">
.chartButton { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px; cursor:pointer;}
.chartButtonSpacer { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px;}
.chartButton:hover { box-shadow:inset 0px 0px 0px 2px #444488; }
.chartButtonPressed { background-color: #CCFFCC; }
</style>
</head>
<body style="margin:0px;">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
// Update the chart when the view port has changed (eg. when the user zooms in using the mouse)
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
viewer.attachHandler("ViewPortChanged", viewer.partialUpdate);
// Initialize the navigation pad
JsViewPortControl.get('<%=WebViewPortControl1.ClientID%>').setViewer(viewer);
// Draw track cursor when mouse is moving over plotarea or if the chart updates
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "PostUpdate",
"Now", "ChartMove"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
});
//
// Draw track line with legend
//
function trackLineLegend(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// The chart and its plot area
var c = viewer.getChart();
var plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = c.getXCoor(xValue);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
for (var i = 0; i < c.getLayerCount(); ++i)
{
var layer = c.getLayerByZ(i);
// The data array index of the x-value
var xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (var j = 0; j < layer.getDataSetCount(); ++j)
{
var dataSet = layer.getDataSetByZ(j);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(10, 10, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(9, 9, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "mm/dd/yyyy") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"padding:0px 0px 3px 3px; font:bold 13px Arial; -webkit-text-size-adjust:100%;");
}
//
// This method is called when the user clicks on the Pointer, Zoom In or Zoom Out buttons
//
function setMouseMode(mode)
{
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
if (mode == viewer.getMouseUsage())
mode = JsChartViewer.Default;
// Set the button color based on the selected mouse mode
document.getElementById("scrollButton").className = "chartButton" +
((mode == JsChartViewer.Scroll) ? " chartButtonPressed" : "");
document.getElementById("zoomInButton").className = "chartButton" +
((mode == JsChartViewer.ZoomIn) ? " chartButtonPressed" : "");
document.getElementById("zoomOutButton").className = "chartButton" +
((mode == JsChartViewer.ZoomOut) ? " chartButtonPressed" : "");
// Set the mouse mode
viewer.setMouseUsage(mode);
}
//
// This method is called when the user clicks on the buttons that selects the last NN days
//
function setTimeRange(duration)
{
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
// Set the view port width to represent the required duration (as a ratio to the total x-range)
viewer.setViewPortWidth(Math.min(1,
duration / (viewer.getValueAtViewPort("x", 1) - viewer.getValueAtViewPort("x", 0))));
// Set the view port left so that the view port is moved to show the latest data
viewer.setViewPortLeft(1 - viewer.getViewPortWidth());
// Trigger a view port change event
viewer.raiseViewPortChangedEvent();
}
</script>
<form method="post" id="ZoomScrollTrack" runat="server">
<table cellspacing="0" cellpadding="0" style="border:black 1px solid;">
<tr>
<td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
<a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
Advanced Software Engineering
</a>
</td>
</tr>
<tr valign="top">
<td style="width:130px; background:#c0c0ff;">
<div style="width:130px">
<!-- The following table is to create 3 cells for 3 buttons to control the mouse usage mode. -->
<table style="width:100%; padding:0px; border:0px; border-spacing:0px;">
<tr>
<td class="chartButton" id="scrollButton" onclick="setMouseMode(JsChartViewer.Scroll)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="scrollew.gif" style="vertical-align:middle" alt="Drag" /> Drag to Scroll
</td>
</tr>
<tr>
<td class="chartButton" id="zoomInButton" onclick="setMouseMode(JsChartViewer.ZoomIn)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="zoomInIcon.gif" style="vertical-align:middle" alt="Zoom In" /> Zoom In
</td>
</tr>
<tr>
<td class="chartButton" id="zoomOutButton" onclick="setMouseMode(JsChartViewer.ZoomOut)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="zoomOutIcon.gif" style="vertical-align:middle" alt="Zoom Out" /> Zoom Out
</td>
</tr>
<tr>
<td class="chartButtonSpacer">
<div style="padding:2px"> </div>
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(30 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last 30 days" /> Last 30 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(90 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last 90 days" /> Last 90 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(366 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="Last Year" /> Last Year
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(1E15);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="goto.gif" style="vertical-align:middle" alt="All Time" /> All Time
</td>
</tr>
</table>
<br />
<br />
<br />
<br />
<div style="text-align:center;">
<input type="button" value="Download PDF" style="font:13px Arial; width:124px;"
onclick="JsChartViewer.get('<%=WebChartViewer1.ClientID%>').partialUpdateAsAttachment();" />
</div>
</div>
</td>
<td style="border-left:black 1px solid; padding:10px 5px 10px 5px;">
<!-- ****** Here is the chart image ****** -->
<chart:WebChartViewer id="WebChartViewer1" runat="server" /><br />
<!-- ****** Here is the view port control ****** -->
<chart:WebViewPortControl id="WebViewPortControl1" runat="server" />
</td>
</tr>
</table>
</form>
</body>
</html>
[ASP.NET MVC - Controller] NetMvcCharts\Controllers\ViewportcontroldemoController.cs
using System;
using System.Web.Mvc;
using ChartDirector;
namespace NetMvcCharts.Controllers
{
public class ViewportcontroldemoController : Controller
{
//
// Initialize the WebChartViewer when the page is first loaded
//
private void initViewer(RazorChartViewer viewer)
{
// The full x-axis range is from Jan 1, 2007 to Jan 1, 2012
DateTime startDate = new DateTime(2010, 1, 1);
DateTime endDate = new DateTime(2015, 1, 1);
viewer.setFullRange("x", startDate, endDate);
// Initialize the view port to show the last 366 days (out of 1826 days)
viewer.ViewPortWidth = 366.0 / 1826;
viewer.ViewPortLeft = 1 - viewer.ViewPortWidth;
// Set the maximum zoom to 10 days (out of 1826 days)
viewer.ZoomInWidthLimit = 10.0 / 1826;
}
//
// Create a random table for demo purpose.
//
private RanTable getRandomTable()
{
RanTable r = new RanTable(127, 4, 1828);
r.setDateCol(0, new DateTime(2010, 1, 1), 86400);
r.setCol(1, 150, -10, 10);
r.setCol(2, 200, -10, 10);
r.setCol(3, 250, -8, 8);
return r;
}
//
// Draw the chart
//
private void drawChart(RazorChartViewer viewer)
{
// Determine the visible x-axis range
DateTime viewPortStartDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft))
;
DateTime viewPortEndDate = Chart.NTime(viewer.getValueAtViewPort("x", viewer.ViewPortLeft +
viewer.ViewPortWidth));
// We need to get the data within the visible x-axis range. In real code, this can be by
// using a database query or some other means as specific to the application. In this demo,
// we just generate a random data table, and then select the data within the table.
RanTable r = getRandomTable();
// Select the data for the visible date range viewPortStartDate to viewPortEndDate. It is
// possible there is no data point at exactly viewPortStartDate or viewPortEndDate. In this
// case, we also need the data points that are just outside the visible date range to
// "overdraw" the line a little bit (the "overdrawn" part will be clipped to the plot area)
// In this demo, we do this by adding a one day margin to the date range when selecting the
// data.
r.selectDate(0, viewPortStartDate.AddDays(-1), viewPortEndDate.AddDays(1));
// The selected data from the random data table
DateTime[] timeStamps = Chart.NTime(r.getCol(0));
double[] dataSeriesA = r.getCol(1);
double[] dataSeriesB = r.getCol(2);
double[] dataSeriesC = r.getCol(3);
//
// Now we have obtained the data, we can plot the chart.
//
//================================================================================
// Configure overall chart appearance.
//================================================================================
// Create an XYChart object of size 640 x 400 pixels
XYChart c = new XYChart(640, 400);
// Set the plotarea at (55, 55) with width 80 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(55, 55, c.getWidth() - 80, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);
// As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping.
c.setClipping();
// Add a title box using dark grey (0x333333) 18pt Arial Bold font
c.addTitle(" Zooming and Scrolling with Viewport Control", "Arial Bold", 15, 0x333333);
if (viewer.IsAttachmentRequest()) {
LegendBox b = c.addLegend(55, 28, false, "Arial Bold", 10);
b.setBackground(Chart.Transparent, Chart.Transparent);
b.setLineStyleKey();
}
// Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
c.yAxis().setLabelStyle("Arial", 10);
// Add axis title using 10pt Arial Bold font
c.yAxis().setTitle("Ionic Temperature (C)", "Arial Bold", 10);
//================================================================================
// Add data to chart
//================================================================================
//
// In this example, we represent the data by lines. You may modify the code below to use
// other layer types (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 (0xff3333), green
// (0x008800) and blue (0x3333cc)
layer.setXData(timeStamps);
layer.addDataSet(dataSeriesA, 0xff3333, "Alpha");
layer.addDataSet(dataSeriesB, 0x008800, "Beta");
layer.addDataSet(dataSeriesC, 0x3333cc, "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());
// For the automatic y-axis labels, set the minimum spacing to 30 pixels.
c.yAxis().setTickDensity(30);
//
// In this demo, the time range can be from a few years to a few days. We demonstrate how to
// set up different date/time format based on the time range.
//
// If all ticks are yearly aligned, then we use "yyyy" as the label format.
c.xAxis().setFormatCondition("align", 360 * 86400);
c.xAxis().setLabelFormat("{value|yyyy}");
// If all ticks are monthly aligned, then we use "mmm yyyy" in bold font as the first label
// of a year, and "mmm" for other labels.
c.xAxis().setFormatCondition("align", 30 * 86400);
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "<*font=bold*>{value|mmm<*br*>yyyy}",
Chart.AllPassFilter(), "{value|mmm}");
// If all ticks are daily algined, then we use "mmm dd<*br*>yyyy" in bold font as the first
// label of a year, and "mmm dd" in bold font as the first label of a month, and "dd" for
// other labels.
c.xAxis().setFormatCondition("align", 86400);
c.xAxis().setMultiFormat(Chart.StartOfYearFilter(),
"<*block,halign=left*><*font=bold*>{value|mmm dd<*br*>yyyy}", Chart.StartOfMonthFilter(),
"<*font=bold*>{value|mmm dd}");
c.xAxis().setMultiFormat2(Chart.AllPassFilter(), "{value|dd}");
// For all other cases (sub-daily ticks), use "hh:nn<*br*>mmm dd" for the first label of a
// day, and "hh:nn" for other labels.
c.xAxis().setFormatCondition("else");
c.xAxis().setMultiFormat(Chart.StartOfDayFilter(), "<*font=bold*>{value|hh:nn<*br*>mmm dd}",
Chart.AllPassFilter(), "{value|hh:nn}");
//================================================================================
// Step 5 - Output the chart
//================================================================================
if (viewer.IsAttachmentRequest()) {
// Output as PDF attachment
viewer.Image = c.makeWebImage(Chart.PDF);
} else {
// Output the chart
viewer.Image = c.makeWebImage(Chart.SVG);
// Output Javascript chart model to the browser to suppport tracking cursor
viewer.ChartModel = c.getJsChartModel();
}
}
private void drawFullChart(RazorViewPortControl vp, RazorChartViewer viewer)
{
// We need to draw a small thumbnail chart for the full data range. The simplest method is to
// simply get the full data to draw the chart. If the full data are very large (eg. millions
// of points), for such a small thumbnail chart, it is often acceptable to just retreive a
// small sample of the data.
//
// In this example, there are only around 5500 points for the 3 data series. This amount is
// not large to ChartDirector, so we simply pass all the data to ChartDirector.
RanTable r = getRandomTable();
// Get all the data from the random table
DateTime[] timeStamps = Chart.NTime(r.getCol(0));
double[] dataSeriesA = r.getCol(1);
double[] dataSeriesB = r.getCol(2);
double[] dataSeriesC = r.getCol(3);
// Create an XYChart object of size 640 x 60 pixels
XYChart c = new XYChart(640, 60);
// Set the plotarea with the same horizontal position as that in the main chart for
// alignment. The vertical position is set to equal to the chart height.
c.setPlotArea(55, 0, c.getWidth() - 80, c.getHeight() - 1, 0xc0d8ff, -1, 0x888888,
Chart.Transparent, 0xffffff);
// Set the x axis stem to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
// Put the x-axis labels inside the plot area by setting a negative label gap. Use
// setLabelAlignment to put the label at the right side of the tick.
c.xAxis().setLabelGap(-1);
c.xAxis().setLabelAlignment(1);
// Set the y axis stem and labels to transparent (that is, hide the labels)
c.yAxis().setColors(Chart.Transparent, Chart.Transparent);
// Add a line layer for the lines with fast line mode enabled
LineLayer layer = c.addLineLayer2();
layer.setFastLineMode();
// Now we add the 3 data series to a line layer, using the color red (0xff3333), green
// (0x008800) and blue (0x3333cc)
layer.setXData(timeStamps);
layer.addDataSet(dataSeriesA, 0xff3333);
layer.addDataSet(dataSeriesB, 0x008800);
layer.addDataSet(dataSeriesC, 0x3333cc);
// The x axis scales should reflect the full range of the view port
c.xAxis().setDateScale(viewer.getValueAtViewPort("x", 0), viewer.getValueAtViewPort("x", 1));
// For the automatic x-axis labels, set the minimum spacing to 75 pixels.
c.xAxis().setTickDensity(75);
// For the auto-scaled y-axis, as we hide the labels, we can disable axis rounding. This can
// make the axis scale fit the data tighter.
c.yAxis().setRounding(false, false);
// Output the chart
vp.Image = c.makeWebImage(Chart.SVG);
}
public ActionResult Index()
{
RazorChartViewer viewer = ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1");
RazorViewPortControl viewPortCtrl = ViewBag.ViewPortControl = new RazorViewPortControl(HttpContext, "chart2");
//
// This script handles both the full page request, as well as the subsequent partial updates
// (AJAX chart updates). We need to determine the type of request first before we processing
// it.
//
if (RazorChartViewer.IsPartialUpdateRequest(Request)) {
// Is a partial update request.
drawChart(viewer);
if (viewer.IsAttachmentRequest()) {
return File(viewer.StreamChart(), Response.ContentType, "demochart.pdf");
} else {
return Content(viewer.PartialUpdateChart());
}
}
//
// If the code reaches here, it is a full page request.
//
// Initialize the WebChartViewer and draw the chart.
initViewer(viewer);
drawChart(viewer);
// Draw a thumbnail chart representing the full range in the WebViewPortControl
drawFullChart(viewPortCtrl, viewer);
return View();
}
}
}
[ASP.NET MVC - View] NetMvcCharts\Views\Viewportcontroldemo\Index.cshtml
@{ Layout = null; }
<!DOCTYPE html>
<html>
<head>
<title>Zooming and Scrolling with Viewport Control</title>
@Scripts.Render("~/Scripts/cdjcv.js")
<style type="text/css">
.chartButton { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px; cursor:pointer;}
.chartButtonSpacer { font:12px Verdana; border-bottom:#000000 1px solid; padding:5px;}
.chartButton:hover { box-shadow:inset 0px 0px 0px 2px #444488; }
.chartButtonPressed { background-color: #CCFFCC; }
</style>
</head>
<body style="margin:0px;">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
// Update the chart when the view port has changed (eg. when the user zooms in using the mouse)
var viewer = JsChartViewer.get('@ViewBag.Viewer.ID');
viewer.attachHandler("ViewPortChanged", viewer.partialUpdate);
// Initialize the navigation pad
JsViewPortControl.get('@ViewBag.ViewPortControl.ID').setViewer(viewer);
// Draw track cursor when mouse is moving over plotarea or if the chart updates
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "PostUpdate",
"Now", "ChartMove"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
});
//
// Draw track line with legend
//
function trackLineLegend(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// The chart and its plot area
var c = viewer.getChart();
var plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = c.getXCoor(xValue);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
for (var i = 0; i < c.getLayerCount(); ++i)
{
var layer = c.getLayerByZ(i);
// The data array index of the x-value
var xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (var j = 0; j < layer.getDataSetCount(); ++j)
{
var dataSet = layer.getDataSetByZ(j);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(10, 10, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(9, 9, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "mm/dd/yyyy") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"padding:0px 0px 3px 3px; font:bold 13px Arial; -webkit-text-size-adjust:100%;");
}
//
// This method is called when the user clicks on the Pointer, Zoom In or Zoom Out buttons
//
function setMouseMode(mode)
{
var viewer = JsChartViewer.get('@ViewBag.Viewer.ID');
if (mode == viewer.getMouseUsage())
mode = JsChartViewer.Default;
// Set the button color based on the selected mouse mode
document.getElementById("scrollButton").className = "chartButton" +
((mode == JsChartViewer.Scroll) ? " chartButtonPressed" : "");
document.getElementById("zoomInButton").className = "chartButton" +
((mode == JsChartViewer.ZoomIn) ? " chartButtonPressed" : "");
document.getElementById("zoomOutButton").className = "chartButton" +
((mode == JsChartViewer.ZoomOut) ? " chartButtonPressed" : "");
// Set the mouse mode
viewer.setMouseUsage(mode);
}
//
// This method is called when the user clicks on the buttons that selects the last NN days
//
function setTimeRange(duration)
{
var viewer = JsChartViewer.get('@ViewBag.Viewer.ID');
// Set the view port width to represent the required duration (as a ratio to the total x-range)
viewer.setViewPortWidth(Math.min(1,
duration / (viewer.getValueAtViewPort("x", 1) - viewer.getValueAtViewPort("x", 0))));
// Set the view port left so that the view port is moved to show the latest data
viewer.setViewPortLeft(1 - viewer.getViewPortWidth());
// Trigger a view port change event
viewer.raiseViewPortChangedEvent();
}
</script>
<form method="post" id="ZoomScrollTrack">
<table cellspacing="0" cellpadding="0" style="border:black 1px solid;">
<tr>
<td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
<a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
Advanced Software Engineering
</a>
</td>
</tr>
<tr valign="top">
<td style="width:130px; background:#c0c0ff;">
<div style="width:130px">
<!-- The following table is to create 3 cells for 3 buttons to control the mouse usage mode. -->
<table style="width:100%; padding:0px; border:0px; border-spacing:0px;">
<tr>
<td class="chartButton" id="scrollButton" onclick="setMouseMode(JsChartViewer.Scroll)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/scrollew.gif")" style="vertical-align:middle" alt="Drag" /> Drag to Scroll
</td>
</tr>
<tr>
<td class="chartButton" id="zoomInButton" onclick="setMouseMode(JsChartViewer.ZoomIn)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/zoomInIcon.gif")" style="vertical-align:middle" alt="Zoom In" /> Zoom In
</td>
</tr>
<tr>
<td class="chartButton" id="zoomOutButton" onclick="setMouseMode(JsChartViewer.ZoomOut)"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/zoomOutIcon.gif")" style="vertical-align:middle" alt="Zoom Out" /> Zoom Out
</td>
</tr>
<tr>
<td class="chartButtonSpacer">
<div style="padding:2px"> </div>
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(30 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/goto.gif")" style="vertical-align:middle" alt="Last 30 days" /> Last 30 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(90 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/goto.gif")" style="vertical-align:middle" alt="Last 90 days" /> Last 90 days
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(366 * 86400);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/goto.gif")" style="vertical-align:middle" alt="Last Year" /> Last Year
</td>
</tr>
<tr>
<td class="chartButton" onclick="setTimeRange(1E15);"
ontouchstart="this.onclick(event); event.preventDefault();">
<img src="@Url.Content("~/Content/goto.gif")" style="vertical-align:middle" alt="All Time" /> All Time
</td>
</tr>
</table>
<br />
<br />
<br />
<br />
<div style="text-align:center;">
<input type="button" value="Download PDF" style="font:13px Arial; width:124px;"
onclick="JsChartViewer.get('@ViewBag.Viewer.ID').partialUpdateAsAttachment();" />
</div>
</div>
</td>
<td style="border-left:black 1px solid; padding:10px 5px 10px 5px;">
<!-- ****** Here is the chart image ****** -->
@Html.Raw(ViewBag.Viewer.RenderHTML())<br />
<!-- ****** Here is the view port control ****** -->
@Html.Raw(ViewBag.ViewPortControl.RenderHTML())
</td>
</tr>
</table>
</form>
</body>
</html>
© 2023 Advanced Software Engineering Limited. All rights reserved.
