Tooltip

You can display an item's label and value on hovering the mouse over that item by simply setting the showTooltip option to true. You can even display an image in the tooltip by using wijtreemap's tooltipOptions option.

This topic displays the area covered by each country (in square kms) when you hover the mouse over a country.

In Source View

Complete the following steps:

Navigate to the Solution Explorer, expand the Shared folder inside the Views folder, and double-click _Layout to open the file.

Add the following script between the <head></head> tags to initialize the widget. Set the showTooltip option to true and set the tooltipOptions option to display an image in the tooltip.

<script id="scriptInit" type="text/javascript">
        $(document).ready(function () {          
            $("#treemap").wijtreemap({          
                showTooltip: true, 
                //set tooltip option to customize tooltip
                tooltipOptions: {
                                  content: function (data) {
                                      if (data.label === "Others") {
                                          //add image to the tooltip
                                          return "<img src='../images/Others.png' alt='Others' style='width:150px;height:150px;' />";
                                    } else
                                          //add text to the tooltip
                                          return data.label + "<br/>" + "Area" + ":" + data.value + " sq. km.";
                                  }
                },
                maxColor: "#FF3300",
                minColor: "#FFFF66",
                midColor: "#99FF33",
                maxColorValue: 45000000,
                minColorValue: 950000,
                midColorValue: 4000000,
           
                data: [{
                    label: "Asia",
                    value: 44579000,
                    minColor: "#B2E0FF",
                    maxColor: "#0099FF",
                    midColor: "#66C2FF",
                    items: [{
                        label: "Central Asia",
                        value: 4003451
                    }, {
                        label: "Eastern Asia",
                        value: 11839074,
                        items: [{
                            label: "China",
                            value: 9596961
                        }, {
                            label: "Japan",
                            value: 377944
                        }, {
                            label: "Others",
                            value: 1864169
                        }]
                    }, {
                        label: "South-East Asia",
                        value: 4500000
                    }, {
                        label: "Western Asia",
                        value: 6255160
                    }, {
                        label: "Southern Asia",
                        value: 17981315,
                        items: [{
                            label: "India",
                            value: 3287590
                        }, {
                            label: "Others",
                            value: 14693725
                        }]
                    }]
                }, {
                    label: "Africa",
                    value: 30221532,
                    minColor: "#FFFFC2",
                    maxColor: "#CCCC52",
                    midColor: "#FFFF75",
                    items: [{
                        label: "Northern Africa",
                        value: 8935659,
                        items: [{
                            label: "Egypt",
                            value: 1002450
                        }, {
                            label: "Morocco",
                            value: 33250000
                        }]
                    }, {
                        label: "Central Africa",
                        value: 6612667,
                    }, {
                        label: "Western Africa",
                        value: 5112903,
                    }, {
                        label: "Southern Africa",
                        value: 1221037
                    }, {
                        label: "Eastern Africa",
                        value: 8339266
                    }]
                }, {
                    label: "Americas",
                    value: 42549000,
                    minColor: "    #C2FFC2",
                    maxColor: "    #52CC52",
                    midColor: "    #94FF94",
                    items: [{
                        label: "South America",
                        value: 17840000,
                        items: [{
                            label: "Brazil",
                            value: 8515767
                        }, {
                            label: "Argentina",
                            value: 2780400
                        }, {
                            label: "Peru",
                            value: 1285216
                        }, {
                            label: "Colombia",
                            value: 1141748
                        }, {
                            label: "Others",
                            value: 4116869
                        }]
                    }, {
                        label: "North America",
                        value: 24709000,
                        items: [{
                            label: "Canada",
                            value: 9984670
                        }, {
                            label: "United States",
                            value: 9629091
                        }, {
                            label: "Greenland",
                            value: 2166086
                        }, {
                            label: "Mexico",
                            value: 1972550
                        }, {
                            label: "Others",
                            value: 956603
                        }]
                    }]
                }, {
                    label: "Europe",
                    value: 10180000,
                    minColor: "#FFCC99",
                    maxColor: "#E68A2E",
                    midColor: "#FFAD5C",
                    items: [{
                        label: "Ukraine",
                        value: 603628
                    }, {
                        label: "Spain",
                        value: 504645
                    }, {
                        label: "France",
                        value: 640679
                    }, {
                        label: "Sweden",
                        value: 449964
                    }, {
                        label: "Others",
                        value: 7981084
                    }]
                }, {
                    label: "Oceania",
                    value: 8525989,
                    minColor: "#00FFFF",
                    maxColor: "#4DFFFF",
                    midColor: "#33FFFF",
                    items: [{
                        label: "Australia",
                        value: 7692024
                    }, {
                        label: "NewZealand",
                        value: 268021
                    }, {
                        label: "others",
                        value: 565944
                    }]
                }, {
                    label: "Antarctica",
                    value: 14000000
                }],
            })
        });
</script>

Add the following markup within the <body></body> tags of the page, just after @RenderBody() to create the widget.
```
<div id="treemap" style="width:800px;height:400px;"></div>
```
Press F5 to run the project.

What You've Accomplished

The wijtreemap appears as shown in the image below. The label and value appear in the tooltip on mouse hover.

An image appears in the tooltip when the mouse is hovered over an item whose label is 'Others'.