您可以使用以下代码自定义图表的颜色方案：
您可以使用以下代码自定义自己的颜色方案：
您可以使用以下代码通过颜色方案获取指定颜色的静态方法：
请注意，更改颜色方案不会更改当前系列或数据点的颜色。
它只在添加新系列或数据点时生效。
如果您希望立即生效，请使用以下代码重置系列或数据点的颜色：
function setSettings(spread) {
let sheet = spread.getActiveSheet();
let theme = sheet.currentTheme();
let builtInColorSchemesDom = document.getElementById('built-in-color-schemes');
let colorSchemes = GC.Spread.Sheets.Charts.ColorSchemes;
Object.keys(colorSchemes).forEach((key) => {
let colorScheme = colorSchemes[key];
let colorSchemeDom = document.createElement("div");
colorSchemeDom.className = "color-scheme";
colorSchemeDom.dataset.key = key;
for (let i = 0; i < 6; i++) {
let colorSchemeItemDom = document.createElement("div");
colorSchemeItemDom.className = "color-item";
colorSchemeItemDom.style.backgroundColor = theme.getColor(GC.Spread.Sheets.Charts.getColor(colorScheme, i, 6));
colorSchemeItemDom.dataset.key = key;
colorSchemeDom.appendChild(colorSchemeItemDom);
}
builtInColorSchemesDom.appendChild(colorSchemeDom);
});
}
window.onload = function () {
let spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'));
let sheet = spread.getActiveSheet();
sheet.setArray(0, 0, [[null,'a1','a2','a3','a4','a5','a6','a7','a8','a9'],
['b1',3,4,7,8,10,12,14,16,18],
['b2',1,9,2,5,5.5,6,6.5,7,7.5]]);
let chart = sheet.charts.add("chart2", GC.Spread.Sheets.Charts.ChartType.columnClustered, 100, 100, 300, 300, "A1:J3", GC.Spread.Sheets.Charts.RowCol.columns, GC.Spread.Sheets.Charts.ColorSchemes.colorfulPalette2);
chart.isSelected(true);
setSettings(spread);
bindEvents(spread);
};
function resetSeriesColor (chart, colorScheme) {
let series = chart.series().get();
for (let i = 0, len = series.length; i < len; i++) {
let seriesItem = series[i];
seriesItem.backColor = GC.Spread.Sheets.Charts.getColor(colorScheme, i, len);
chart.series().set(i, seriesItem);
}
}
function getActiveCharts (spread) {
let sheet = spread.getActiveSheet();
let charts = sheet.charts.all(), selectedCharts = [];
for (let i = 0, len = charts.length; i < len; i++) {
if (charts[i].isSelected()) {
selectedCharts.push(charts[i]);
}
}
return selectedCharts;
}
function getBuiltInColorScheme (key) {
return GC.Spread.Sheets.Charts.ColorSchemes[key];
}
function resetChartsColorScheme (selectedCharts, colorScheme) {
if (!colorScheme || selectedCharts.length === 0) {
return;
}
selectedCharts.forEach((selectedChart) => {
selectedChart.colorScheme(colorScheme);
resetSeriesColor(selectedChart, colorScheme);
});
}
function bindEvents(spread) {
document.getElementById("built-in-color-schemes").addEventListener('click', function (event) {
let key = event.target.dataset && event.target.dataset.key;
let colorScheme = getBuiltInColorScheme(key);
let selectedCharts = getActiveCharts(spread);
resetChartsColorScheme(selectedCharts, colorScheme);
});
}
<!doctype html>
<html style="height:100%;font-size:14px;">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="spreadjs culture" content="zh-cn" />
<link rel="stylesheet" type="text/css" href="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
<script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets/dist/gc.spread.sheets.all.min.js" type="text/javascript"></script>
<script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets-shapes/dist/gc.spread.sheets.shapes.min.js" type="text/javascript"></script>
<script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets-charts/dist/gc.spread.sheets.charts.min.js" type="text/javascript"></script>
<script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity-software/spread-sheets-resources-zh/dist/gc.spread.sheets.resources.zh.min.js" type="text/javascript"></script>
<script src="$DEMOROOT$/spread/source/js/license.js" type="text/javascript"></script>
<script src="app.js" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div class="sample-tutorial">
<div id="ss" class="sample-spreadsheets"></div>
<div class="options-container">
<p>Select a built in color scheme to reset the selected charts' color scheme.</p>
<div id="built-in-color-schemes">
</div>
</div>
</div>
</body>
</html>
.sample-tutorial {
position: relative;
height: 100%;
overflow: hidden;
}
.sample-spreadsheets {
width: calc(100% - 280px);
height: 100%;
overflow: hidden;
float: left;
}
.options-container {
float: right;
width: 280px;
padding: 12px;
height: 100%;
box-sizing: border-box;
background: #fbfbfb;
overflow: auto;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
label {
display: inline-block;
width: 80px;
}
.settings-row {
width: 100%;
height: 30px;
font-size: 13px;
}
#built-in-color-schemes {
height: 80%;
overflow-y: scroll;
overflow-x: clip;
border: black 1px solid;
}
#colors-list {
min-height: 40px;
margin-bottom: 10px;
border: black 1px solid;
}
.color-scheme {
width: 256px;
height: 40px;
}
.color-scheme:hover {
background-color: #CCCCCC;
}
.color-item {
width: 34px;
height: 34px;
margin: 2px;
display: inline-block;
}
