设置选择时,请确保所选对象的“列”参数引用DataTable中的正确列。
编辑:
如果酒吧是太小,无法显示选择的效果,你可以改用一个黑客这样http://jsfiddle.net/asgallant/5SX8w/来改变选择栏颜色。当你只有一系列数据时,这是最好的;如果您的系列数超过1个,则需要修改,并且可能无法正确显示,除非您使用堆叠酒吧。
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Value');
data.addRows([
['Foo', 94],
['Bar', 23],
['Baz', 80],
['Bat', 47],
['Cad', 32],
['Qud', 54]
]);
var chart = new google.visualization.ChartWrapper({
chartType: 'ColumnChart',
containerId: 'chart_div',
dataTable: data,
options: {
// setting the "isStacked" option to true fixes the spacing problem
isStacked: true,
height: 300,
width: 600,
series: {
1: {
// set the color to change to
color: '00A0D0',
// don't show this in the legend
visibleInLegend: false
}
}
}
});
google.visualization.events.addListener(chart, 'select', function() {
var selection = chart.getChart().getSelection();
if (selection.length > 0) {
var newSelection = [];
// if row is undefined, we selected the entire series
// otherwise, just a single element
if (typeof(selection[0].row) == 'undefined') {
newSelection.push({
column: 2
});
chart.setView({
columns: [0, {
type: 'number',
label: data.getColumnLabel(1),
calc: function() {
// this series is just a placeholder
return 0;
}
}, 1]
});
}
else {
var rows = [];
for (var i = 0; i < selection.length; i++) {
rows.push(selection[i].row);
// move the selected elements to column 2
newSelection.push({
row: selection[i].row,
column: 2
});
}
// set the view to remove the selected elements from the first series and add them to the second series
chart.setView({
columns: [0, {
type: 'number',
label: data.getColumnLabel(1),
calc: function (dt, row) {
return (rows.indexOf(row) >= 0) ? null : {v: dt.getValue(row, 1), f: dt.getFormattedValue(row, 1)};
}
}, {
type: 'number',
label: data.getColumnLabel(1),
calc: function (dt, row) {
return (rows.indexOf(row) >= 0) ? {v: dt.getValue(row, 1), f: dt.getFormattedValue(row, 1)} : null;
}
}]
});
}
// re-set the selection when the chart is done drawing
var runOnce = google.visualization.events.addListener(chart, 'ready', function() {
google.visualization.events.removeListener(runOnce);
chart.getChart().setSelection(newSelection);
});
}
else {
// if nothing is selected, clear the view to draw the base chart
chart.setView();
}
chart.draw();
});
chart.draw();
}
我不知道这是一个问题,图表上的条形图太多,取消setSelection函数?在我看来,它可以正常工作10-20条,但是当你像我们这样拥有大量数据时 - 数据条不会突出显示,请参阅jsfiddle - 你同意吗? – Paul
是的,在狭窄的条纹下,选择看起来没有任何视觉效果。 – asgallant
任何方法来破解你知道的东西?这并不理想 – Paul