SpreadJSでは、ウォーターフォールチャートをサポートします。チャートの種類を取得するには、GC.Spread.Sheets.Charts.ChartType.waterfallプロパティを使用します。ウォーターフォールチャートは数値の増加と減少する累積を表示します。 ウォーターフォールチャートを使用することで、初期値（例：純利益）が一連の正負の値によって、どのように増減しているかを把握できます。
SpreadJSでウォーターフォールチャートを追加したり、スタイルを変更したりするには、チャートAPIを使用します。
<template>
<div class="sample-tutorial">
<gc-spread-sheets class="sample-spreadsheets" @workbookInitialized="initSpread">
<gc-worksheet />
<gc-worksheet />
<gc-worksheet />
</gc-spread-sheets>
</div>
</template>
<script setup>
import "@mescius/spread-sheets-vue";
import GC from "@mescius/spread-sheets";
import {
ref
} from "vue";
import "@mescius/spread-sheets-shapes";
import '@mescius/spread-sheets-charts';
import '@mescius/spread-sheets-resources-ja';
GC.Spread.Common.CultureManager.culture("ja-jp");
const spreadRef = ref(null);
function initSpread(spread) {
let sheets = spread.sheets;
spread.suspendPaint();
spread.fromJSON(data);
let customWaterfallChart = sheets[0].charts.add("customWaterfallChart", GC.Spread.Sheets.Charts.ChartType.waterfall, 400, 0, 700, 450, "B2:C15");
let baseWaterfallChart = sheets[1].charts.add("baseWaterfallChart", GC.Spread.Sheets.Charts.ChartType.waterfall, 400, 0, 700, 450, "B2:C15");
setCustomStyle(customWaterfallChart);
setBaseStyle(baseWaterfallChart);
spread.resumePaint();
}
function setCustomStyle(chart) {
let chartArea = chart.chartArea();
chartArea.fontSize = 14;
chart.chartArea(chartArea);
let dataLabels = chart.dataLabels();
dataLabels.showValue = true;
dataLabels.color = 'rgb(64,60,61)';
dataLabels.position = GC.Spread.Sheets.Charts.DataLabelPosition.center;
chart.dataLabels(dataLabels);
let legend = chart.legend();
legend.position = GC.Spread.Sheets.Charts.LegendPosition.bottom;
chart.legend(legend)
let title = chart.title();
title.text = "Monthly Income";
title.fontSize = 16;
chart.title(title);
let series = chart.series().get(0);
series.showConnectorLines = true;
series.gapWidth = 0.2;
series.subtotals = [0, 13];
chart.series().set(0, series);
chart.formatOvers({
0: {
backColor: "rgb(61,198,147)",
},
1: {
backColor: "rgb(225,128,99)",
},
2: {
backColor: "rgb(91,188,214)",
}
});
}
function setBaseStyle(chart) {
let title = chart.title();
title.text = "Monthly Income";
title.fontSize = 16;
chart.title(title);
let series = chart.series().get(0);
series.showConnectorLines = true;
series.subtotals = [13];
chart.series().set(0, series);
}
</script>
<style scoped>
.sample-tutorial {
position: relative;
height: 100%;
overflow: hidden;
}
.sample-spreadsheets {
width: 100%;
height: 100%;
overflow: hidden;
float: left;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
#app {
height: 100%;
}
</style>
<!DOCTYPE html>
<html lang="en" style="height:100%;font-size:14px;">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>SpreadJS VUE</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" type="text/css"
href="$DEMOROOT$/ja/vue3/node_modules/@mescius/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
<script src="$DEMOROOT$/ja/vue3/node_modules/systemjs/dist/system.src.js"></script>
<script src="$DEMOROOT$/spread/source/data/waterfallData.js" type="text/javascript"></script>
<script src="./systemjs.config.js"></script>
<script src="./compiler.js" type="module"></script>
<script>
var System = SystemJS;
System.import("./src/app.js");
System.import('$DEMOROOT$/ja/lib/vue3/license.js');
</script>
</head>
<body>
<div id="app"></div>
</body>
</html>
(function (global) {
SystemJS.config({
transpiler: 'plugin-babel',
babelOptions: {
es2015: true
},
paths: {
// paths serve as alias
'npm:': 'node_modules/'
},
packageConfigPaths: [
'./node_modules/*/package.json',
"./node_modules/@mescius/*/package.json",
"./node_modules/@babel/*/package.json",
"./node_modules/@vue/*/package.json"
],
map: {
'vue': "npm:vue/dist/vue.esm-browser.js",
'tiny-emitter': 'npm:tiny-emitter/index.js',
'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js',
"systemjs-babel-build": "npm:systemjs-plugin-babel/systemjs-babel-browser.js",
'@mescius/spread-sheets': 'npm:@mescius/spread-sheets/index.js',
'@mescius/spread-sheets-resources-ja': 'npm:@mescius/spread-sheets-resources-ja/index.js',
'@mescius/spread-sheets-vue': 'npm:@mescius/spread-sheets-vue/index.js',
'@mescius/spread-sheets-shapes': 'npm:@mescius/spread-sheets-shapes/index.js',
'@mescius/spread-sheets-charts': 'npm:@mescius/spread-sheets-charts/index.js',
},
meta: {
'*.css': { loader: 'systemjs-plugin-css' },
'*.vue': { loader: "../plugin-vue/index.js" }
}
});
})(this);
