User Interactions

Tooltip

Enable tooltip for data point

Tooltip for the data points can be enabled by using the visible option of the tooltip in the series.

  • javascript
  • /// <reference path="tsfiles/jquery.d.ts" />
    /// <reference path="tsfiles/ej.web.all.d.ts" />
    
    module ChartComponent {
        $(function () {
            var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...           
                series: [{
                      
                      //...
                      //Enable tooltip for the series
                      tooltip: {visible: true}	
                  }],
               // ...
               
            });
        });
    }

    Point Tooltip

    Format the tooltip

    Tooltip displays data specified by the format option of the tooltip. The default value of the format option is * #point.x# : #point.y# *. Here, * #point.x# * is the placeholder for x value of the point and * #point.y# * is the placeholder for y value of the point.

    You can also use * **#series.#** * as placeholder to display the value of an option in corresponding series and use * **#point.#** * as place holder to display the value of an option in the corresponding point.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...
                series: [{
                     tooltip: {
                           //Displaying tooltip in a format
                           format: "#series.name# <br/> #point.x# : #point.y#  (g/kWh)"	
                           // ...
                     } 
                  }],
                // ...
            });

    Tooltip Format

    Tooltip Template

    HTML elements can be displayed in the tooltip by using the template option of the tooltip. The template option takes the value of the id attribute of the HTML element. You can use the * #point.x# * and * #point.y# * as place holders in the HTML element to display the x and y values of the corresponding data point.

    You can also use * **#series.#** * as place holder to display the value of an option in corresponding series of the tooltip and use * **#point.#** * as place holder to display the value of an option in the corresponding point for which the tooltip is displayed.

  • html
  • <body>
       <div id="chartContainer"></div>
        <!-- Create Tooltip template here -->
        <div id="Tooltip" style="display: none;">
                  <div id="icon"> <div id="eficon"> </div>  </div>
            <div id="value">
                <div>
                   <label id="efpercentage">&nbsp;#point.y#% </label>
                   <label id="ef">Efficiency </label>
                </div>
            </div>
        </div>
    <script>
       var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
         	// ...             
    	    series: [{
                  tooltip: {
                     //Set template id to tooltip template
                     template: 'Tooltip',	
                     // ...
                    }
              }],
    	    // ...             
        });
        
       </script>
    </body>

    Tooltip Format

    Tooltip template animation

    You can enable animation by setting the enableAnimation to true. Tooltip animates when the mouse moves from one data point to another point. The duration property in tooltip specifies the time taken to animate the tooltip. the duration is set to “500ms”, by default.

    NOTE

    Tooltip is animated only if the template is specified for tooltip.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                
                // ...
                series: [{
                      tooltip: {
                        //Enable tooltip template animation and set duration time
                        enableAnimation: true, duration: "1000ms",                                      
                        // ...
                     }
                 }],
                 
                // ...
            });

    Customize the appearance of tooltip

    The fill and border options are used to customize the background color and border of the tooltip respectively. The font option in the tooltip is used to customize the font of the tooltip text.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...
                series: [{
                     tooltip: {
                           //Change tooltip color and border
                           fill: '#FF9933',
                           border: { width: 1, color: "#993300" }	
                           // ...
                     } 
                  }],
                // ...
            });

    Tooltip Customization

    Tooltip with rounded corners

    The options rx and ry are used to customize the corner radius of the tooltip rectangle.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	        // ...             
    	        series: [{
                     tooltip: {
                        //Customize the corner radius of the tooltip rectangle.
                        rx: "50", ry: "50"                            
                        // ...
                     }
                  }],
    	       // ... 
            });

    Rounded Tooltip

    Zooming and Panning

    Enable Zooming

    There are two ways you can zoom the chart,

    • When the zooming.enable option is set to true, you can zoom the chart by using the rubber band selection.

    • When the zooming.enableMouseWheel option is set to true, you can zoom the chart on mouse wheel scrolling.

    • When zooming.enablePinching option is set to true, you can zoom the chart through pinch gesture.

    NOTE

    Pinch zooming is supported only in browsers that support multi-touch gestures. Currently IE10, IE11, Chrome and Opera browsers support multi-touch in desktop devices.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                 //  ...             
    	         //Enable zooming in chart
                 zooming: {enable: true}
                 // ...
            });

    Zooming

    After zooming the chart, a zooming toolbar will appear with options to zoom, pan and reset. Selecting the Pan option will allow to pan the chart and selecting the Reset option will reset the zoomed chart.

    Zooming Toolbar

    Types of zooming

    The type option in zooming specifies whether the chart is allowed to scale along the horizontal axis or vertical axis or along both axis. The default value of the type is “xy” (both axis).

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                 //  ...             
    	         zooming: {
                        enable: true,
                        //Enable horizontal zooming
                        type: 'x'
                    } 
                 // ...
            });

    Customizing zooming toolbar

    You can choose the items displayed in the zooming toolbar by specifying the property toolBarItems.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                 //  ...             
    	         //Customizing zooming toolbar
    	         zooming:{	
    			   enable: true,
                   toolbarItems: ["reset", "zoomIn", "zoomOut"]
    			},
                 // ...
        });

    Toolbar Customization

    Enable ScrollBar

    EjChart provides scrollbar support to view the other portions of chart area which is not shown in the view port when zoomed, by setting true to enableScrollbar option in zooming.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                 //  ...             
    	         //Enable zooming scrollbar  in chart
                 zooming: {enable:true, enableScrollbar: true}
                 // ...
         });

    Enable Scrollbar

    Crosshair

    Crosshair is used to view the value of an axis at mouse position or touch contact point.

    Enable crosshair and crosshair label

    Crosshair can be enabled by using the visible option in the crosshair. Crosshair label for an axis can be enabled by using the visible option of crosshairLabel in the corresponding axis.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...             
                primaryXAxis:{
                    //Enable crosshairLabel to X-Axis
                    crosshairLabel: { visible: true },
                },
    
                primaryYAxis:{
                    //Enable crosshairLabel to Y-Axis
                    crosshairLabel: { visible: true },
                },
               
               //Initializing Crosshair
                crosshair:{
                    visible: true
                },
                // ...             
    
            });

    Crosshair Label

    Customize the crosshair line and crosshair label

    The fill and border options of the crosshairLabel is used to customize the background color and border of the crosshair label respectively. Color and width of the crosshair line can be customized by using the line option in the crosshair.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                 // ...             
                 primaryXAxis: {
                         //...
                         crosshairLabel: {
                              visible: true,
                              //Customizing the crosshair label background color and border
                              fill: "red", 
                              border: { color: "green", width: 2 }
                          }
                  },
                   
                  crosshair: {
                       visible: true,
                       //Customizing the crosshair line
                       line: { color: 'gray', width: 2 },
                  } 
                // ...
            });

    Crosshair Label and Line

    Trackball

    Trackball is used to track a data point close to the mouse position or touch contact point. Trackball marker indicates the closest point and trackball tooltip displays the information about the point.

    Enable Trackball

    Trackball can be enabled by setting the visible option of the crosshair to true and then set the type as “trackball”. The default value of type is “crosshair”.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                 crosshair: {
                       visible: true,
                       //Change crosshair type to trackball
                       type: 'trackball',
                      } 
               //......
               });

    Trackball Visibility

    Customize trackball marker and trackball line

    Shape and size of the trackball marker can be customized by using the shape and size options of the crosshair marker. Color and width of the trackball line can be customized by using the line option in the crosshair.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                 // ...
                 crosshair: {
                      visible: true,
    
                      //Customize the trackball line color and width
                      line: { color: '#800000', width: 2 },
    
                      //Customize the trackball marker shape size and visibility
                      marker: {
                           shape: 'pentagon',
                           size: {
                                height: 9, width: 9
                             },
                           //Enable/disable trackball marker
                           visible: true
                        }     
                    } 
                  // ...
               });

    Trackball Line and Marker

    Format Trackball tooltip

    X and Y values displayed in the trackball tooltip are formatted based on its axis labelFormat.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  primaryXAxis: {
                       labelFormat: 'MMM, yyyy',
                       //...
                   },
                  
                  primaryYAxis: {
                        labelFormat: '{value}K',
                        //...
                   },
                   
                   crosshair: {
                        visible: true,
                        type: 'trackball',                           
                    }
                      // ...
               });

    Trackball Tooltip Format

    You can able to show the trackball tooltip in two modes, using trackballTooltipSettings.

                1.	Grouping.
                2.	Float. 
    
  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                    // ... 
                        crosshair: {
                            visible: true,
                            type: 'trackball',
                            //Customize the trackball tooltip
                            trackballTooltipSettings: {
                                //Trackball mode
                                mode: 'grouping',
                                //Customize the trackball border, fill, rx and ry               
                                    border:{ 
                                        width:1,
                                        color: 'Grey'
                                    },
                                rx: 3,
                                ry: 3,
                                fill: 'whitesmoke'
                            }
                         }
             // ... });

    Trackball Tooltip Customization

    Trackball tooltip template:

    Trackball tooltip template is used to display the tooltip in customized template format. You can define the desired template in css style. You can enable the toolTipTemplate by using the following code snippet.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                    // ... 
                        crosshair: {
                            visible: true,
                            type: 'trackball',
                            //Customize the trackball tooltip
                            trackballTooltipSettings: {
                                //Trackball mode
                                mode: 'float',
                                toolTipTemplate: 'template'
                            }
                         }
             // ... });

    Trackball Tooltip Template

    Highlight

    EjChart provides highlighting support for the series and data points on mouse hover. To enable the highlighting option, set the enable property to true in the highlightSettings of the series.

    NOTE

    When hovering mouse on the data points, the corresponding series legend also will be highlighted.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            
                             // enable the highlight settings
                             enable: true,
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Highlight Mode

    You can set three different highlight mode for the highlighting data point and series by using the mode property of the highlightSettings.

    • Series
    • Points
    • Cluster

    Series mode

    To highlight all the data points of the specified series, you can set the “series” value to the mode option in the highlightSettings.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            enable: true, 
                            
                            //Change highlight mode
                            mode: 'series'
    
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Series Highlight

    Point mode

    To highlight a single point, you can set the “point” value to the mode option.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            enable: true, 
                            
                            //Change highlight mode
                            mode: 'point'
    
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Point Highlight

    Cluster mode

    To highlight the points that corresponds to the same index in all the series, set the “cluster” value to the mode option.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            enable: true, 
                            
                            //Change highlight mode
                            mode: 'cluster'
    
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Cluster Highlight

    Customize the highlight styles

    To customize the highlighted series, use the color, border and opacity options in the highlightSettings.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), { 
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            enable: true, 
                            
                            //Customizing 
                            border: { width: '1.5', color: "red" },
                            opacity: 0.5, color: "green"
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Highlight Customization

    Patterns to highlight

    EjChart provides pattern support for highlighting the data by setting the value to the pattern property of the highlightSettings. The different types of highlight patterns are as follows.

    1. chessboard
    2. crosshatch
    3. dots
    4. pacman
    5. grid
    6. turquoise
    7. star
    8. triangle
    9. circle
    10. tile
    11. horizontalDash
    12. verticalDash
    13. rectangle
    14. box
    15. verticalStripe
    16. horizontalStripe
    17. bubble
    18. diagonalBackward
    19. diagonalForward
  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                  // ...
                  series:[{
                      
                        highlightSettings: {
                            enable: true, 
                            
                            //Change highlighting pattern
                             pattern: "chessboard",
    
                         },
                        // ... 
                   }]       
                        
                   // ...
               });

    Highlight Pattern

    Custom pattern

    To create a custom pattern for the highlighting data points, set the pattern type as “custom” and add the custom pattern id in the customPattern option of the highlightSettings.

  • html
  • <body>
        <div id="container"></div>
                <svg>
                    <pattern id="dots_a" patternUnits="userSpaceOnUse" width="6" height="6">
                        <rect x="0" y="0" width="6" height="6" transform="translate(0,0)" fill="black" opacity="1"></rect>
                        <path d='M 3 -3 L -3 3 M 0 6 L 6 0 M 9 3 L 3 9'stroke-width="1" stroke="white"></path>
                    </pattern>
                </svg>
    <script type="text/javascript">
    
       var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...
                series:[{
                    highlightSettings: [{
                        enable: true,
                        //Add custom pattern for highlighting data
                        pattern: "custom",
                        customPattern: 'dots_a',
                        // ...
                    }],
                    // ...       
         });
    
            </script>
    </body>

    Selection

    EjChart provides selection support for the series and data points on mouse click. To enable the selection option, set the enable property to true in the selectionSettings of the series.

    NOTE

    When mouse is clicked on the data points, the corresponding series legend also will be selected.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             // enable the selection settings
                             enable: true, 
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Selection Mode

    You can set four different selection mode for highlighting the data point and series by using the mode property of the selectionSettings.

    • Series
    • Points
    • Cluster
    • Range

    Series mode

    To select all the data points of the specified series, you can set the “series” value to the mode option in the selectionSettings.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             enable: true, 
                             
                            //Change selection mode
                             mode: 'series',
                             pattern: 'chessboard'
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Series Selection

    Point mode

    To highlight a single point, you can set the “point” value to the mode option.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             enable: true, 
                             
                            //Change selection mode
                             mode: 'point',
                             // ...
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Point Selection

    Cluster mode

    To select the points that corresponds to the same index in all the series, set the “cluster” value to the mode option.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             enable: true, 
                             
                            //Change selection mode
                             mode: 'cluster',
                             // ...
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Cluster Selection

    Range mode

    To fetch the selected area data points value, you can set the selectionSettings mode as range in the chart series. The selection rectangle can be drawn as horizontally, vertically or in both direction by using rangeType property and the selected data’s are returned as an array collection in the rangeSelected event.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                        // ...
                        series:[{
                      
                            selectionSettings: {
                                enable: true, 
                             
                                //Change selection mode
                                mode: 'range',
    
                                //Enable both axis selection
                                rangeType:'xy'
    
                                // ...
                            }, 
    
                            // ... 
                        }],
                     //Subscribe the rangeSelected event. 
                     rangeSelected: "rangeSelection"  
                     // ...
               });
    
             //event to fetch the selected data point values
             rangeSelection:function (sender){
                var selectedData = sender.data.selectedDataCollection;
                //...
             }

    Range Selection

    Selection Type

    You can set two different selection type for selecting the data point and series on mouse click by using the type property of the selectionSettings.

    • Single
    • Multiple

    Single Type

    To select a data point or a series on mouse click based on the selectionSettings.mode, set selectionSettings.type as “single” in the series.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {  
    	
                  // ...
                  commonSeriesOptions:{
                      			    
    			    selectionSettings: {
    			        enable: true,
                        //Selection mode is series or point ,cluster
    			        mode: 'series',
                        //Selection type is single
    			        type: 'single'
    			    },
    			}
     
                   // ...
           });

    Single Selection

    Multiple Type

    For selecting multiple data points or series on mouse click, set selectionSettings.type as “multiple” in the series.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), { 
    	
                  // ...
                  commonSeriesOptions:{
                      			    
    			    selectionSettings: {
    			        enable: true,
                        //Selection mode is series or point ,cluster
    			        mode: 'series',
                        //Selection type is multiple
    			        type: 'multiple'
    			    },
    			}
     
                   // ...
           });

    Multiple Selection

    Customizing selection styles

    To customize the selection styles, use the color, border and opacity options in the selectionSettings.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             enable: true, 
                             
                            //Customizing selection rectangle styles
                             border: { width: '1.5', color: "red" },
                             opacity: 0.5, color: "red"
                             // ...
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Selection Customization

    Patterns for selection

    EjChart provides pattern support for the data selection by setting the value to the pattern property of the selectionSettings. The different types of selection patterns are as follows.

    1. chessboard
    2. crosshatch
    3. dots
    4. pacman
    5. grid
    6. turquoise
    7. star
    8. triangle
    9. circle
    10. tile
    11. horizontalDash
    12. verticalDash
    13. rectangle
    14. box
    15. verticalStripe
    16. horizontalStripe
    17. bubble
    18. diagonalBackward
    19. diagonalForward
  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), { 
    	
                  // ...
                  series:[{
                      
                       selectionSettings: {
                             enable: true, 
                             
                            //Change selection pattern
                             pattern: "diagonalForward",
                             // ...
                          },
                        // ... 
                   }]       
                        
                   // ...
               });

    Selection Pattern

    Custom pattern

    To create a custom pattern for selecting the data points, set the pattern type as “custom” and add the custom pattern id in the customPattern option of the selectionSettings.

  • html
  • <body>
        <div id="container"></div>
                <svg>
                    <pattern id="dots_a" patternUnits="userSpaceOnUse" width="6" height="6">
                        <rect x="0" y="0" width="6" height="6" transform="translate(0,0)" fill="black" opacity="1"></rect>
                        <path d='M 3 -3 L -3 3 M 0 6 L 6 0 M 9 3 L 3 9'stroke-width="1" stroke="white"></path>
                    </pattern>
                </svg>
    <script type="text/javascript">
    
       var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
                // ...
                series:[{
                    selectionSettings: [{
                        enable: true,
                        //Add custom pattern for selection data
                        pattern: "custom",
                        customPattern: 'dots_a',
                        // ...
                    }],
                    // ...       
         });
    
            </script>
    </body>

    Custom Selection Pattern

    Handling Series Selection

    To get the series information when selecting the specific series, subscribe to the seriesRegionClick event and set the selectionSettings.mode as “series”.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
    	
                 // ... 
                  series:[{
                    selectionSettings: [{
                        enable: true,
                        //Change selection mode
                        mode: "series",
                        // ...
                    }],
               
               //Subscribe series selection event
               seriesRegionClick: "seriesSelection",
                // ... 
            });
    
            function seriesSelection(sender) {
                //Get Series information on series selection
                var seriesData = sender.series;
            }

    Selection on Load

    We can able to select the point/series programmatically on chart load, by setting series and point index in the selectedDataPointIndexes property.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), { 
    	
                 // ... 
               
               //Added selected data point indexes
    
               selectedDataPointIndexes: [
                   { seriesIndex:0 , pointIndex:2 },
                   { seriesIndex:1 , pointIndex:4 }
               ],
                
                // ...
    
            });

    Selected Point Indexes

    Data Editing

    EjChart provides support to change the location of the rendered points. This can be done by dragging the point and dropping it on another location in chart. To enable the data editing, set the enable property to true in the dragSettings of the series.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {	  
          //Initializing Series
          series:[{     
                  dragSettings:{     
    		        enable: true
    		}
               }]   
         });

    Point Dragging

    Customize Dragging direction

    To drag the point along x and y axes, you can specify type as xy in dragSettings. And to drag along x axis alone, specify the type as x and to drag along y axis, specify type as y.

  • javascript
  • var chartSample = new ej.datavisualization.Chart($("#chartContainer"), {
      {	  
          //Initializing Series
          series:[{     
                  dragSettings:{     
    		        type: 'y'
    		}
               }]   
         });

    Dragging Direction