有一种方法可以获取所选节点的当前数据级别。
例如在这种情况下：https://jsfiddle.net/yojtv1fq/
['Shakespeare', null, 0],
['Tragedies', 'Shakespeare', null],
['The Tragedy Of Othello', 'Tragedies', null],
['Othello', 'The Tragedy Of Othello', 274],
点击它们如何获得关卡？
答案 0 :(得分：0)
使用'select'事件来了解何时单击/选择树。
然后计算我们找到所选值的父级的次数。
要找到父行，请使用数据表方法-> getFilteredRows
例如
选择时，获取所选行的父级值。
var title = data.getValue(selection[0].row, 1);
找到父行。
rows = data.getFilteredRows([{
column: 0,
value: title
}]);
获取该行的父级值。
if (rows.length > 0) {
title = data.getValue(rows[0], 1);
level++;
}
重复查找父行，直到找不到父行为止。
请参阅以下工作片段...
google.charts.load('current', {
packages: ['treemap']
}).then(function () {
var data = google.visualization.arrayToDataTable([
['Shakespeare', null, 0],
['Comedies', 'Shakespeare', null],
['Tragedies', 'Shakespeare', null],
['Histories', 'Shakespeare', null],
['As You Like It', 'Comedies', null],
['Adam', 'As You Like It', 10],
['Amiens', 'As You Like It', 10],
['Audrey', 'As You Like It', 12],
['Celia', 'As You Like It', 108],
['Charles', 'As You Like It', 8],
['Corin', 'As You Like It', 24],
['Dennis', 'As You Like It', 2],
['Duke', 'As You Like It', 32],
['Frederick', 'As You Like It', 20],
['Hymen', 'As You Like It', 1],
['Jaques (lord)', 'As You Like It', 57],
['Jaques (son)', 'As You Like It', 2],
['Le Beau', 'As You Like It', 14],
['Oliver', 'As You Like It', 37],
['Orlando', 'As You Like It', 120],
['Phebe', 'As You Like It', 23],
['Rosalind', 'As You Like It', 201],
['Silvius', 'As You Like It', 24],
['Sir Oliver Martext', 'As You Like It', 3],
['Touchstone', 'As You Like It', 74],
['William', 'As You Like It', 11],
['Comedy Of Errors', 'Comedies', null],
['Adriana', 'Comedy Of Errors', 79],
['Aegeon', 'Comedy Of Errors', 17],
['Aemilia', 'Comedy Of Errors', 16],
['Angelo', 'Comedy Of Errors', 31],
['Antipholus of Ephesus', 'Comedy Of Errors', 76],
['Antipholus of Syracuse', 'Comedy Of Errors', 103],
['Balthazar', 'Comedy Of Errors', 5],
['Courtezan', 'Comedy Of Errors', 11],
['Dromio of Ephesus', 'Comedy Of Errors', 63],
['Dromio of Syracuse', 'Comedy Of Errors', 99],
['Luce', 'Comedy Of Errors', 7],
['Luciana', 'Comedy Of Errors', 43],
['Pinch', 'Comedy Of Errors', 6],
['Solinus', 'Comedy Of Errors', 22],
['Merchant Of Venice', 'Comedies', null],
['Antonio', 'Merchant Of Venice', 47],
['Balthasar', 'Merchant Of Venice', 1],
['Bassanio', 'Merchant Of Venice', 73],
['Duke (of Venice)', 'Merchant Of Venice', 18],
['Gratiano', 'Merchant Of Venice', 48],
['Jessica', 'Merchant Of Venice', 26],
['Launcelot Gobbo', 'Merchant Of Venice', 44],
['Leonardo', 'Merchant Of Venice', 2],
['Lorenzo', 'Merchant Of Venice', 47],
['Nerissa', 'Merchant Of Venice', 36],
['Old Gobbo', 'Merchant Of Venice', 19],
['Portia', 'Merchant Of Venice', 117],
['Prince of Arragon', 'Merchant Of Venice', 4],
['Prince of Morocco', 'Merchant Of Venice', 7],
['Salanio', 'Merchant Of Venice', 18],
['Salarino', 'Merchant Of Venice', 27],
['Salerio', 'Merchant Of Venice', 6],
['Shylock', 'Merchant Of Venice', 79],
['Stephano', 'Merchant Of Venice', 3],
['Tubal', 'Merchant Of Venice', 8],
['Midsummer Night\'s Dream', 'Comedies', null],
['Bottom', 'Midsummer Night\'s Dream', 59],
['Cobweb', 'Midsummer Night\'s Dream', 4],
['Demetrius', 'Midsummer Night\'s Dream', 48],
['Egeus', 'Midsummer Night\'s Dream', 7],
['Fairy', 'Midsummer Night\'s Dream', 4],
['Flute', 'Midsummer Night\'s Dream', 18],
['Helena', 'Midsummer Night\'s Dream', 36],
['Hermia', 'Midsummer Night\'s Dream', 48],
['Hippolyta', 'Midsummer Night\'s Dream', 14],
['Lysander', 'Midsummer Night\'s Dream', 50],
['Moth', 'Midsummer Night\'s Dream', 2],
['Mustardseed', 'Midsummer Night\'s Dream', 5],
['Oberon', 'Midsummer Night\'s Dream', 29],
['Peaseblossom', 'Midsummer Night\'s Dream', 4],
['Philostrate', 'Midsummer Night\'s Dream', 6],
['Puck', 'Midsummer Night\'s Dream', 33],
['Quince', 'Midsummer Night\'s Dream', 40],
['Snout', 'Midsummer Night\'s Dream', 9],
['Snug', 'Midsummer Night\'s Dream', 4],
['Starveling', 'Midsummer Night\'s Dream', 7],
['Theseus', 'Midsummer Night\'s Dream', 48],
['Titania', 'Midsummer Night\'s Dream', 23],
['Taming Of The Shrew', 'Comedies', null],
['Baptista Minola', 'Taming Of The Shrew', 68],
['Bianca', 'Taming Of The Shrew', 29],
['Biondello', 'Taming Of The Shrew', 39],
['Christopher Sly', 'Taming Of The Shrew', 24],
['Curtis', 'Taming Of The Shrew', 20],
['Gremio', 'Taming Of The Shrew', 58],
['Grumio', 'Taming Of The Shrew', 63],
['Haberdasher', 'Taming Of The Shrew', 1],
['Hortensio', 'Taming Of The Shrew', 70],
['Joseph', 'Taming Of The Shrew', 1],
['Katherina', 'Taming Of The Shrew', 82],
['Lucentio', 'Taming Of The Shrew', 61],
['Nathaniel', 'Taming Of The Shrew', 4],
['Nicholas', 'Taming Of The Shrew', 1],
['Peter', 'Taming Of The Shrew', 2],
['Petruchio', 'Taming Of The Shrew', 158],
['Philip', 'Taming Of The Shrew', 1],
['Tranio', 'Taming Of The Shrew', 90],
['Vincentio', 'Taming Of The Shrew', 23],
['The Tempest', 'Comedies', null],
['Adrian', 'The Tempest', 9],
['Alonso', 'The Tempest', 40],
['Antonio, duke of Milan', 'The Tempest', 57],
['Ariel', 'The Tempest', 45],
['Caliban', 'The Tempest', 50],
['Ceres', 'The Tempest', 4],
['Ferdinand', 'The Tempest', 31],
['Francisco', 'The Tempest', 2],
['Gonzalo', 'The Tempest', 52],
['Iris', 'The Tempest', 4],
['Juno', 'The Tempest', 2],
['Master', 'The Tempest', 2],
['Miranda', 'The Tempest', 50],
['Nymphs', 'The Tempest', 0],
['Prospero', 'The Tempest', 114],
['Reapers', 'The Tempest', 0],
['Sebastian', 'The Tempest', 67],
['Stephano (Servant to Portia)', 'The Tempest', 60],
['Trinculo', 'The Tempest', 39],
['Henry VIII', 'Histories', null],
['Anne Bullen', 'Henry VIII', 18],
['Archbishop Cranmer', 'Henry VIII', 21],
['Bishop Lincoln', 'Henry VIII', 2],
['Brandon', 'Henry VIII', 6],
['Capucius', 'Henry VIII', 5],
['Cardinal Campeius', 'Henry VIII', 14],
['Cardinal Wolsey', 'Henry VIII', 79],
['Cromwell', 'Henry VIII', 21],
['Doctor Butts', 'Henry VIII', 4],
['Duke of Buckingham', 'Henry VIII', 26],
['Duke of Norfolk', 'Henry VIII', 48],
['Duke of Suffolk', 'Henry VIII', 30],
['Earl of Surrey', 'Henry VIII', 24],
['First Secretary to Wolsey', 'Henry VIII', 2],
['Gardiner', 'Henry VIII', 22],
['Garter', 'Henry VIII', 1],
['Griffith', 'Henry VIII', 13],
['King Henry VIII', 'Henry VIII', 81],
['Lord Abergavenny', 'Henry VIII', 5],
['Lord Chamberlain', 'Henry VIII', 38],
['Lord Chancellor', 'Henry VIII', 7],
['Lord Sands', 'Henry VIII', 17],
['Old Lady', 'Henry VIII', 14],
['Patience', 'Henry VIII', 3],
['Porter (door-keeper of the Council-chamber)', 'Henry VIII', 10],
['Queen Katharine', 'Henry VIII', 50],
['Sir Anthony Denny', 'Henry VIII', 3],
['Sir Henry Guildford', 'Henry VIII', 1],
['Sir Nicholas Vaux', 'Henry VIII', 1],
['Sir Thomas Lovell', 'Henry VIII', 21],
['Surveyor to the Duke of Buckingham', 'Henry VIII', 9],
['History Of King John', 'Histories', null],
['Arthur Duke of Bretagne', 'History Of King John', 23],
['Blanch', 'History Of King John', 9],
['Cardinal Pandulph', 'History Of King John', 23],
['Chatillon', 'History Of King John', 5],
['Constance', 'History Of King John', 36],
['Essex', 'History Of King John', 1],
['Faulconbridge', 'History Of King John', 4],
['Hubert de Burgh', 'History Of King John', 52],
['James Gurney', 'History Of King John', 1],
['King John', 'History Of King John', 95],
['King Phillip', 'History Of King John', 43],
['Lady Faulconbridge', 'History Of King John', 5],
['Lewis the Dauphin', 'History Of King John', 29],
['Lord Bigot', 'History Of King John', 6],
['Lymoges duke of Austria', 'History Of King John', 16],
['Melun', 'History Of King John', 3],
['Pembroke earl of Pembroke', 'History Of King John', 20],
['Peter of Pomfret', 'History Of King John', 1],
['Philip the Bastard', 'History Of King John', 89],
['Prince Henry', 'History Of King John', 8],
['Queen Elinor', 'History Of King John', 22],
['Salisbury earl of Salisbury', 'History Of King John', 36],
['Antony And Cleopatra', 'Tragedies', null],
['Agrippa', 'Antony And Cleopatra', 28],
['Alexas', 'Antony And Cleopatra', 15],
['Antony', 'Antony And Cleopatra', 202],
['Canidius', 'Antony And Cleopatra', 10],
['Captain', 'Antony And Cleopatra', 1],
['Charmian', 'Antony And Cleopatra', 63],
['Cleopatra', 'Antony And Cleopatra', 204],
['Demetrius (Friend to Antony)', 'Antony And Cleopatra', 2],
['Dercetas', 'Antony And Cleopatra', 5],
['Diomedes', 'Antony And Cleopatra', 7],
['Dolabella', 'Antony And Cleopatra', 23],
['Domitius Enobarus', 'Antony And Cleopatra', 113],
['Egyptian', 'Antony And Cleopatra', 2],
['Eros', 'Antony And Cleopatra', 27],
['Euphronius', 'Antony And Cleopatra', 5],
['Gallus', 'Antony And Cleopatra', 1],
['Iras', 'Antony And Cleopatra', 18],
['Lepidus', 'Antony And Cleopatra', 30],
['Mardian', 'Antony And Cleopatra', 7],
['Mecaenas', 'Antony And Cleopatra', 16],
['Menas', 'Antony And Cleopatra', 35],
['Menecrates', 'Antony And Cleopatra', 2],
['Octavia', 'Antony And Cleopatra', 13],
['Octavius', 'Antony And Cleopatra', 98],
['Philo', 'Antony And Cleopatra', 2],
['Pompey', 'Antony And Cleopatra', 41],
['Proculeius', 'Antony And Cleopatra', 10],
['Scarus', 'Antony And Cleopatra', 12],
['Seleucus', 'Antony And Cleopatra', 3],
['Silius', 'Antony And Cleopatra', 3],
['Taurus', 'Antony And Cleopatra', 1],
['Thyreus', 'Antony And Cleopatra', 12],
['Varrius', 'Antony And Cleopatra', 1],
['Ventidius', 'Antony And Cleopatra', 4],
['Coriolanus', 'Tragedies', null],
['Aedile', 'Coriolanus', 10],
['Cominius', 'Coriolanus', 67],
['Coriolanus (Caius Marcius Coriolanus)', 'Coriolanus', 189],
['Junius Brutus', 'Coriolanus', 91],
['Lieutenant', 'Coriolanus', 4],
['Menenius Agrippa', 'Coriolanus', 162],
['Patrician', 'Coriolanus', 3],
['Roman', 'Coriolanus', 10],
['Sicinius Velutus', 'Coriolanus', 117],
['Titus Lartius', 'Coriolanus', 23],
['Tullus Aufidius', 'Coriolanus', 45],
['Valeria', 'Coriolanus', 14],
['Virgilia', 'Coriolanus', 26],
['Volsce', 'Coriolanus', 9],
['Volumnia', 'Coriolanus', 57],
['Young Coriolanus', 'Coriolanus', 1],
['Cymbeline', 'Tragedies', null],
['Arviragus', 'Cymbeline', 46],
['Belarius', 'Cymbeline', 58],
['Caius Lucius', 'Cymbeline', 25],
['Cloten', 'Cymbeline', 77],
['Cornelius (physician)', 'Cymbeline', 13],
['Cymbeline, King of Britain', 'Cymbeline', 81],
['Guiderius', 'Cymbeline', 62],
['Helen', 'Cymbeline', 0],
['Iachimo', 'Cymbeline', 77],
['Imogen', 'Cymbeline', 118],
['Jupiter', 'Cymbeline', 1],
['Philario', 'Cymbeline', 14],
['Pisanio', 'Cymbeline', 58],
['Posthumus Leonatus', 'Cymbeline', 77],
['Queen', 'Cymbeline', 27],
['Roman Captain', 'Cymbeline', 4],
['Sicilius Leonatus', 'Cymbeline', 7],
['The Tragedy of Hamlet, Prince of Denmark', 'Tragedies', null],
['Bernardo', 'The Tragedy of Hamlet, Prince of Denmark', 19],
['Claudius, King of Denmark', 'The Tragedy of Hamlet, Prince of Denmark', 102],
['Cornelius', 'The Tragedy of Hamlet, Prince of Denmark', 1],
['Father\'s Ghost', 'The Tragedy of Hamlet, Prince of Denmark', 15],
['Fortinbras', 'The Tragedy of Hamlet, Prince of Denmark', 6],
['Francisco ', 'The Tragedy of Hamlet, Prince of Denmark', 8],
['Gertrude', 'The Tragedy of Hamlet, Prince of Denmark', 69],
['Guildenstern', 'The Tragedy of Hamlet, Prince of Denmark', 29],
['Hamlet', 'The Tragedy of Hamlet, Prince of Denmark', 358],
['Horatio', 'The Tragedy of Hamlet, Prince of Denmark', 109],
['Laertes', 'The Tragedy of Hamlet, Prince of Denmark', 62],
['Lucianus', 'The Tragedy of Hamlet, Prince of Denmark', 0],
['Marcellus', 'The Tragedy of Hamlet, Prince of Denmark', 37],
['Ophelia', 'The Tragedy of Hamlet, Prince of Denmark', 58],
['Osric', 'The Tragedy of Hamlet, Prince of Denmark', 25],
['Polonius', 'The Tragedy of Hamlet, Prince of Denmark', 86],
['Reynaldo', 'The Tragedy of Hamlet, Prince of Denmark', 13],
['Rosencrantz', 'The Tragedy of Hamlet, Prince of Denmark', 48],
['Voltemand', 'The Tragedy of Hamlet, Prince of Denmark', 1],
['Julius Caesar', 'Tragedies', null],
['Antony (Marcus Antonius)', 'Julius Caesar', 51],
['Artemidorus of Cnidos', 'Julius Caesar', 4],
['Brutus (Marcus Brutus)', 'Julius Caesar', 194],
['Caesar (Julius Caesar)', 'Julius Caesar', 42],
['Calpurnia', 'Julius Caesar', 6],
['Casca', 'Julius Caesar', 39],
['Cassius', 'Julius Caesar', 140],
['Cicero', 'Julius Caesar', 4],
['Cinna', 'Julius Caesar', 11],
['Cinna the Poet', 'Julius Caesar', 8],
['Claudius', 'Julius Caesar', 2],
['Clitus', 'Julius Caesar', 8],
['Dardanius', 'Julius Caesar', 3],
['Decius Brutus', 'Julius Caesar', 12],
['Flavius', 'Julius Caesar', 5],
['Lepidus (Marcus Antonius Lepidus)', 'Julius Caesar', 3],
['Ligarius', 'Julius Caesar', 5],
['Lucilius', 'Julius Caesar', 10],
['Lucius', 'Julius Caesar', 24],
['Marullus', 'Julius Caesar', 6],
['Messala', 'Julius Caesar', 20],
['Metellus Cimber', 'Julius Caesar', 5],
['Octavius (Octavius Caesar)', 'Julius Caesar', 19],
['Pindarus', 'Julius Caesar', 5],
['Popilius (Popilius Lena)', 'Julius Caesar', 2],
['Portia (wife of Brutus)', 'Julius Caesar', 16],
['Publius', 'Julius Caesar', 2],
['Strato', 'Julius Caesar', 4],
['Tintinius', 'Julius Caesar', 10],
['Trebonius', 'Julius Caesar', 4],
['Varro', 'Julius Caesar', 6],
['Volumnius', 'Julius Caesar', 3],
['Young Cato', 'Julius Caesar', 3],
['King Lear', 'Tragedies', null],
['Cordelia', 'King Lear', 31],
['Curan', 'King Lear', 4],
['Duke of Albany', 'King Lear', 58],
['Duke of Burgundy', 'King Lear', 5],
['Duke of Cornwall', 'King Lear', 53],
['Earl of Gloucester', 'King Lear', 118],
['Earl of Kent', 'King Lear', 127],
['Edgar', 'King Lear', 98],
['Edmund', 'King Lear', 79],
['Goneril', 'King Lear', 53],
['King of France', 'King Lear', 5],
['Lear', 'King Lear', 188],
['Oswald', 'King Lear', 38],
['Regan', 'King Lear', 73],
['The Tragedy Of Macbeth', 'Tragedies', null],
['Angus', 'The Tragedy Of Macbeth', 4],
['Banquo', 'The Tragedy Of Macbeth', 33],
['Caithness', 'The Tragedy Of Macbeth', 3],
['Donalbain', 'The Tragedy Of Macbeth', 3],
['Duncan', 'The Tragedy Of Macbeth', 18],
['Fleance', 'The Tragedy Of Macbeth', 2],
['Hecate', 'The Tragedy Of Macbeth', 2],
['Lady Macbeth', 'The Tragedy Of Macbeth', 59],
['Lady Macduff', 'The Tragedy Of Macbeth', 19],
['Lennox', 'The Tragedy Of Macbeth', 21],
['Macbeth', 'The Tragedy Of Macbeth', 146],
['Macduff', 'The Tragedy Of Macbeth', 59],
['Malcolm', 'The Tragedy Of Macbeth', 40],
['Menteith', 'The Tragedy Of Macbeth', 5],
['Porter', 'The Tragedy Of Macbeth', 4],
['Ross', 'The Tragedy Of Macbeth', 39],
['Seyton', 'The Tragedy Of Macbeth', 5],
['Siward', 'The Tragedy Of Macbeth', 11],
['Son (Macduff\'s son)', 'The Tragedy Of Macbeth', 14],
['Young Siward', 'The Tragedy Of Macbeth', 4],
['The Tragedy Of Othello', 'Tragedies', null],
['Bianca (Mistress to Cassio)', 'The Tragedy Of Othello', 15],
['Brabantio', 'The Tragedy Of Othello', 30],
['Cassio', 'The Tragedy Of Othello', 110],
['Desdemona', 'The Tragedy Of Othello', 165],
['Duke of Venice', 'The Tragedy Of Othello', 25],
['Emilia', 'The Tragedy Of Othello', 103],
['Gratiano (Brother to Brabantio)', 'The Tragedy Of Othello', 20],
['Iago', 'The Tragedy Of Othello', 272],
['Lodovico', 'The Tragedy Of Othello', 33],
['Montano', 'The Tragedy Of Othello', 24],
['Othello', 'The Tragedy Of Othello', 274],
['Roderigo', 'The Tragedy Of Othello', 59],
['Romeo And Juliet', 'Tragedies', null],
['Abraham', 'Romeo And Juliet', 5],
['Balthasar (Servant to Romeo)', 'Romeo And Juliet', 12],
['Benvolio', 'Romeo And Juliet', 64],
['Capulet', 'Romeo And Juliet', 51],
['Friar John', 'Romeo And Juliet', 4],
['Friar Laurence', 'Romeo And Juliet', 55],
['Gregory', 'Romeo And Juliet', 15],
['Juliet', 'Romeo And Juliet', 118],
['Lady Capulet', 'Romeo And Juliet', 45],
['Lady Montague', 'Romeo And Juliet', 2],
['Mercutio', 'Romeo And Juliet', 62],
['Montague', 'Romeo And Juliet', 10],
['Paris', 'Romeo And Juliet', 23],
['Peter (Servant to Juliet\'s Nurse)', 'Romeo And Juliet', 13],
['Prince Escalus', 'Romeo And Juliet', 16],
['Romeo', 'Romeo And Juliet', 163],
['Sampson', 'Romeo And Juliet', 20],
['Tybalt', 'Romeo And Juliet', 17]
], true);
var tree = new google.visualization.TreeMap(document.getElementById('chart_div'));
google.visualization.events.addListener(tree, 'select', function () {
var selection = tree.getSelection();
if (selection.length > 0) {
var rows;
var title = data.getValue(selection[0].row, 1);
var level = 0;
do {
rows = data.getFilteredRows([{
column: 0,
value: title
}]);
if (rows.length > 0) {
title = data.getValue(rows[0], 1);
level++;
}
} while (rows.length > 0);
console.log(level);
}
});
tree.draw(data, {
highlightOnMouseOver: true,
maxDepth: 1,
maxPostDepth: 2,
minHighlightColor: '#8c6bb1',
midHighlightColor: '#9ebcda',
maxHighlightColor: '#edf8fb',
minColor: '#009688',
midColor: '#f7f7f7',
maxColor: '#ee8100',
headerHeight: 15,
showScale: true,
height: 500,
useWeightedAverageForAggregation: true
});
});<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>