jQWidgets jqxTreeMap legendScaleCallback Property
jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful, optimized, platform-independent, and widely supported framework. The jqxTreeMap is used for showing the hierarchical data set of nested rectangles. Here each and every branch of the tree is represented as a rectangle, which is then tiled with smaller rectangles that represent sub-branches. Here the rectangle of the leaf node has an area proportional to a specified dimension on the data.
The legendScaleCallback property is used to set or return a callback function in order to style the values shown in the legend of the displayed jqxTreeMap. It is of type Object and its default value is “null”.
Syntax:
- Set the legendScaleCallback property:
$("#jqxTreeMap").jqxTreeMap({ legendScaleCallback: null });
- Return the legendScaleCallback property:
var legendScaleCallback = $('#jqxTreeMap').jqxTreeMap('legendScaleCallback');
Linked Files: Download jQWidgets from the given link. In the HTML file, locate the script files in the downloaded folder.
<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtooltip.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxtreemap.js”></script>
Example 1: The below example illustrates the jQWidgets jqxTreeMap legendScaleCallback property.
HTML
<!DOCTYPE html> < html lang = "en" > < head > < link rel = "stylesheet" href = "jqwidgets/styles/jqx.base.css" type = "text/css" /> < script type = "text/javascript" src = "scripts/jquery.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxcore.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxtooltip.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxtreemap.js" > </ script > < script type = "text/javascript" src = "scripts/jqx-all.js" > </ script > </ head > < body > < center > < h1 style = "color:green;" > w3wiki </ h1 > < h3 > jQWidgets jqxTreeMap legendScaleCallback property </ h3 > < div id = "Tree_Map" ></ div > < script type = "text/javascript" > $(document).ready(function () { var d = [{ label: 'w3wiki', id: "1", value: 70, color: '#ff0300' }, { label: 'is a', id: "2", value: 10, parent: 'w3wiki', color: '#ff5400' }, { label: 'Computer Science', id: "3", value: 30, parent: 'w3wiki', color: '#008000' }, { label: 'Portal.', id: "4", value: 15, parent: 'w3wiki', color: '#7fbf00' } ]; var src = { datatype: "json", datafields: [ { name: 'id' }, { name: 'parent' }, { name: 'label' }, { name: 'value' } ], id: 'id', localdata: d }; var da = new $.jqx.dataAdapter(src); $('#Tree_Map').jqxTreeMap({ width: 390, height: 200, source: d, colorMode: 'rangeColors', legendScaleCallback: function (lsc) { lsc = lsc.toFixed(2); return lsc; }, }); }); </ script > </ center > </ body > </ html > |
Output:
Example 2: The following is another example of jQWidgets jqxTreeMap legendScaleCallback property.
HTML
<!DOCTYPE html> < html lang = "en" > < head > < link rel = "stylesheet" href = "jqwidgets/styles/jqx.base.css" type = "text/css" /> < script type = "text/javascript" src = "scripts/jquery.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxcore.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxtooltip.js" > </ script > < script type = "text/javascript" src = "jqwidgets/jqxtreemap.js" > </ script > < script type = "text/javascript" src = "scripts/jqx-all.js" > </ script > </ head > < body > < center > < h1 style = "color: green;" > w3wiki </ h1 > < h3 > jQWidgets jqxTreeMap legendScaleCallback property </ h3 > < div id = "Tree_Map" ></ div > < input type = "button" style = "margin: 28px;" id = "btn" value = "click here" /> < div id = "log" ></ div > < script type = "text/javascript" > $(document).ready(function () { var d = [{ label: 'w3wiki', id: "1", value: 70, color: '#ff0300' }, { label: 'is a', id: "2", value: 10, parent: 'w3wiki', color: '#ff5400' }, { label: 'Computer Science', id: "3", value: 30, parent: 'w3wiki', color: '#008000' }, { label: 'Portal.', id: "4", value: 15, parent: 'w3wiki', color: '#7fbf00' } ]; var src = { datatype: "json", datafields: [ { name: 'id' }, { name: 'parent' }, { name: 'label' }, { name: 'value' } ], id: 'id', localdata: d }; var da = new $.jqx.dataAdapter(src); $('#Tree_Map').jqxTreeMap({ width: 390, height: 200, source: d, colorMode: 'rangeColors', legendScaleCallback: null }); $("#btn").jqxButton({ width: 300 }); $("#btn").click( function () { var lsc = $('#Tree_Map') .jqxTreeMap('legendScaleCallback'); $("#log").text(lsc); }); }); </ script > </ center > </ body > </ html > |
Output:
Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxtreemap/jquery-treemap-api.htm?search=
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