Sometimes chart elements are self-descriptive, like Pie chart slices with labels, or a Line chart with one line series. Some of the legend features include: The legend can be positioned anywhere around the chart area by setting the legend.position property. Events on ng2-chart. Custom-Events. Padding around the title. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. The chart legend displays data about the datasets that are appearing on the chart. See https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash, // For box border. In the Select Data Source dialog box, in the Legend Entries (Series) box, select the legend … legend.position JSON Configuration Detailed inforation on how to use the legend.position options.. Similarly, any series legend entry can be removed from the legend by setting its legendEntry_visible to false. Arguments: A callback that is called when a 'mousemove' event is registered outside of a previously hovered label item. See https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset, // For box border. Now when you click the legend in this chart, the visibility of the first two datasets will be linked together. Of course, the beauty of Chart.js is that your charts can easily by dynamic and update/respond to data received from a backend or from user input. legend: (boolean = false) – if true show legend below the chart, otherwise not be shown . The legend title configuration is nested below the legend configuration using the title key. Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor. The legend entry icon is fully customizable. Legend in JQuery Chart widget Location. Custom entries can be used to populate the legend with any data or information. The most important parts are: onClick function call for each legend label. By default, when the legend template includes '%name' or '%value', it refers to these properties rather than '%name' and '%value' of the actual target item. Generates legend items for each thing in the legend. See, Filters legend items out of the legend. Event listener in javascript. If specified as a number, it applies evenly to all sides. An item marker identifies the series color. Defaults to 'center' for unrecognized values. The currently active points and labels are returned as part of the emitted event’s data. Arguments: [event, legendItem, legend]. This can be easily achieved using a callback in the config object. Arbitrary token values can also be used in the template and custom text for those tokens can be specified for each legend entry like so: By default, each series gets an entry in the legend. Both the xand y locations can be customized in the location property. Custom legend entries can be added to the legend through the legend.customEntries property. Receives 3 parameters, two, If specified, this style of point is used for the legend. On the Design tab, in the Data group, click Select Data. Legend template property defines columns for a legend that apply to all entries. Steps: Here the button is created in html, but is made active thanks to javascript. The location property is used for customizing the position of the chart legend. Other times, user might need some visual clues to make sense of the information. Each series is represented by an item on a Legend. The global options for the chart legend is defined in Chart.defaults.plugins.legend. Some of the legend features include: Flexible and automated positioning Items passed to the legend onClick function are the ones returned from labels.generateLabels.These items must implement the following interface. The JSCharting legend is a powerful and fully customizable data grid that allows customizing columns with data attributes and calculations through the use of expressions. AxisMarkers entries are added to the legend by default as well. Only used if. After the event is triggered, the event related data is passed as a parameter to the assigned event handler. plotOptions.series.events.legendItemClick. Tokens used with custom entries are evaluated using the series collection token list which refers to series on the chart. javascript - Click events on Pie Charts in Chart.js - Stack Overflow ... On legend click working fine with this code onClick: function(e, legendItem) ... After that on click function -> legantItem you can read the custom attribute value. Custom entries can be used to populate the legend with any data or information. Plugin. The legendEntry value and name properties can contain tokens and expressions as well. chart-options (default: {}): Chart.js options; chart-click (optional): onclick event handler; chart-hover (optional): onmousemove event handler; chart-colors (default to global colors): colors for the chart; chart-dataset-override (optional): override datasets individually if (chart.data.datasets[i].label) { legendHtml.push('' + chart.data.datasets[i].label + ''); } and function. We could change the click handler accordingly. Plugin that allows you to add extra events, like double / right click on each chart element, for Highcharts. The legend is a box containing a symbol and name for each series item or point item in the chart. With custom legend entry icons, legend entries can even be used as clickable buttons similar to uiItems. In chart js library legends defaultly have four postions (top,right,bottom,left). There are two charts on the page: A visits per day, and visits per hour (by individual day). This tutorial describes how the legend can be manipulated. However when a series has a palette property set, a legend entry for each point of the series is added in place of the series legend entry. javascript $ Point entry click event action can differ between chart types. The legend.header property can be used to specify labels for each column defined in legend.template property. It is highly customizable, but configuring all of its options remains a challenge for some people. The header property must contain the same number of items as the template. But I'm also trying to add an onClick event to the individual bars of the chart, and it's not finding the method I want it to call. Label will be rendered with a strike-through effect, // For box border. For NPM users: ... legend; datalabels; flags; crosshairs; Demo. good-looking charts shouldn't be difficult Download v0.5.1 or use cdnjs ... you should see the following chart on your page: What Next? However, legend entries can also show points, axis marker, and custom entries. In the bellow example we add a new data points for the month of May: Default implementation returns the text + styling for the color box. onHover: function: A callback that is called when a 'mousemove' event is registered on top of a label item. Plotly graphs emit events prefixed with plotly_ (i.e. Chart with legendNames: Sets custom legend names. Chartjs V2 Add Custom Legend and Show/Hide Chart Data through Click To add interactive feature for Chartjs version such as select/unselect group of data, you can use chart.metadata.hidden attribute. Chart.js is a popular open source library that helps us to plot data in web applications. If the smartPalette options define color ranges, the legend will display these ranges instead. Arguments: A callback that is called when a 'mousemove' event is registered on top of a label item. However, with absolute or relative positioning, this setting should be specified with the legend.layout property: The legend.template property can be populated with a space or comma delimited string of expressions and tokens that define the data shown for each column. Arguments: Legend will show datasets in reverse order. By default, legend entries are interactive and when clicked they provide a useful action depending on what the entry represents. Lets say we wanted instead to link the display of the first two datasets. Recharts - Re-designed charting library built with React and D3. This is a list of 10 working graphs (bar chart, pie chart, line chart, etc.) chartClick: fires when click on a chart has occurred, returns information regarding active points and labels; chartHover: fires when mousemove (hover) on a chart has occurred, returns information regarding active points and labels Legend Item Interface. The legend label configuration is nested below the legend configuration using the labels key. Updating Datasets Dynamically. It can be common to want to trigger different behaviour when clicking an item in the legend. One parameter, event, is passed to the function. When using a position name such as 'topLeft' the legend entries are automatically laid out either vertically or horizontally depending on the position. For example, a pie chart where entries represent slices can highlight or explode the pie slice. // If true, this item represents a hidden dataset. Marks that this box should take the full width of the canvas (pushing down other boxes). Version: 2.0.15. so lets start the code...Let's try this code.... exporting), add