图例支持如下属性的自定义：
Visible: 图例的可见性.
Position: 上, 右, 左, 下, 右上.
Background: 颜色, 透明度.
Text: 字体，字号，字色.
Border: 颜色, 透明度，宽度，线形宽度.
Overlapping: 图例是否覆盖图表区域.
Layout: x, y, 宽，高.
你可以通过如下方式来获取或者设置一个chart的图例：
var spread;
window.onload = function () {
spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"), { sheetCount: 2 });
initSpread(spread);
initEvent(spread);
//readSetting(new GC.Spread.Sheets.CellTypes.CheckBoxList());
}
function initSpread(spread) {
var sheet = spread.getSheet(0);
sheet.suspendPaint();
var dataArray = [
["", 'Chrome', 'Firefox', 'IE', 'Safari', 'Edge', 'Opera', 'Other'],
["2014", 0.4966, 0.1801, 0.2455, 0.0470, 0.0, 0.0150, 0.0158],
["2015", 0.5689, 0.1560, 0.1652, 0.0529, 0.0158, 0.0220, 0.0192],
["2016", 0.6230, 0.1531, 0.1073, 0.0464, 0.0311, 0.0166, 0.0225],
["2017", 0.6360, 0.1304, 0.0834, 0.0589, 0.0443, 0.0223, 0.0246]
];
sheet.setArray(0, 0, dataArray);
var chart = sheet.charts.add('Chart1', GC.Spread.Sheets.Charts.ChartType.lineMarkers, 30, 120, 480, 270, "A1:D5", GC.Spread.Sheets.Charts.RowCol.columns);
chart.title({text: "Chart Legend"});
var legend = chart.legend();
legend.borderStyle.color = "green";
legend.borderStyle.width = 3;
legend.fontSize = 9;
legend.backColor = "orange";
legend.backColorTransparency = 0.8;
chart.legend(legend);
sheet.resumePaint();
}
function initEvent(spread) {
spread.bind(GC.Spread.Sheets.Events.FloatingElementSelected, function () {
var sheet = spread.getActiveSheet();
var chart = getActiveChart(sheet);
if (chart) {
readSetting(chart);
}
});
_getElementById("apply").addEventListener('click', function () {
applySetting();
});
}
function readSetting(chart) {
var legend = chart.legend();
_getElementById("visible").checked = legend.visible;
_getElementById("position").value = legend.position;
_getElementById("backColor").value = legend.backColor;
_getElementById("backColorTransparency").value = legend.backColorTransparency;
_getElementById("color").value = legend.color;
_getElementById("fontFamily").value = legend.fontFamily;
_getElementById("fontSize").value = legend.fontSize;
_getElementById("border-color").value = legend.borderStyle.color;
_getElementById("border-width").value = legend.borderStyle.width;
_getElementById("border-transparency").value = legend.borderStyle.transparency;
_getElementById("showLegendWithoutOverlapping").checked = legend.showLegendWithoutOverlapping !== false;
if (legend.layout && legend.layout.x) {
_getElementById("layoutX").value = legend.layout.x;
}
if (legend.layout && legend.layout.y) {
_getElementById("layoutY").value = legend.layout.y;
}
if (legend.layout && legend.layout.width) {
_getElementById("layoutWidth").value = legend.layout.width;
}
if (legend.layout && legend.layout.height) {
_getElementById("layoutHeight").value = legend.layout.height;
}
}
function applySetting() {
var sheet = spread.getActiveSheet();
var chart = getActiveChart(sheet);
if (!chart) {
return;
}
var legend = {
visible: _geBoolean("visible"),
position: _getValue("position"),
showLegendWithoutOverlapping: _geBoolean("showLegendWithoutOverlapping"),
backColor: _getText("backColor"),
backColorTransparency: _getFloat("backColorTransparency"),
color: _getText("color"),
fontFamily: _getText("fontFamily"),
fontSize: _getValue("fontSize"),
borderStyle:{
color: _getText("border-color"),
width: _getValue("border-width"),
transparency: _getFloat("border-transparency")
},
layout: {
x: _getFloat("layoutX"),
y: _getFloat("layoutY"),
width: _getFloat("layoutWidth"),
height: _getFloat("layoutHeight")
}
}
chart.legend(legend);
}
function getActiveChart(sheet) {
var activeChart = null;
sheet.charts.all().forEach(function (chart) {
if (chart.isSelected()) {
activeChart = chart;
}
});
return activeChart;
}
function _getElementById(id) {
return document.getElementById(id);
}
function _geBoolean(id) {
return _getElementById(id).checked;
}
function _getFloat(id) {
return isNaN(parseFloat(_getElementById(id).value)) ? undefined : parseFloat(_getElementById(id).value);
}
function _getValue(id) {
return parseInt(_getElementById(id).value);
}
function _getText(id) {
return _getElementById(id).value;
}
<!doctype html>
<html style="height:100%;font-size:14px;">
<head>
<meta name="spreadjs culture" content="zh-cn" />
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<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="$DEMOROOT$/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 class="sample-tutorial">
<div id="ss" class="sample-spreadsheets"></div>
<div class="options-container">
<p>Change the properties below then press the Set button to apply these changes.</p>
<div class="option-row">
<label for="visible">Visible</label>
<input type="checkbox" id="visible" checked />
</div>
<div class="option-row" id="">
<label for="position">Position</label>
<select id="position">
<option value="1">top</option>
<option value="2">right</option>
<option value="3">left</option>
<option value="4" selected="selected">bottom</option>
<option value="5">topRight</option>
</select>
</div>
<div class="option-row">
<input type="checkbox" id="showLegendWithoutOverlapping" checked />
<label style="display:inline" for="showLegendWithoutOverlapping">Show the legend without overlapping
the chart</label>
</div>
<div class="option-row" id="">
<label for="backColor">Back Color</label>
<input type="text" id="backColor" value="#FF0000" />
</div>
<div class="option-row" id="">
<label for="backColorTransparency">Back Color Transparency</label>
<input type="number" id="backColorTransparency" step="0.1" min="0" max="1" value="0.7" />
</div>
<hr>
<div class="option-row">
<label for="layoutX">Legend X(% of Chart)</label>
<input type="number" id="layoutX" step="0.01" min="0" max="1" />
</div>
<div class="option-row">
<label for="layoutY">Legend Y(% of Chart)</label>
<input type="number" id="layoutY" step="0.01" min="0" max="1" />
</div>
<div class="option-row">
<label for="layoutWidth">Legend Width(% of Chart)</label>
<input type="number" id="layoutWidth" step="0.01" min="0" max="1" />
</div>
<div class="option-row">
<label for="layoutHeight">Legend Height(% of Chart)</label>
<input type="number" id="layoutHeight" step="0.01" min="0" max="1" />
</div>
<hr>
<div class="option-row" id="">
<label for="color">Font Color:</label>
<input type="text" id="color" value="#00FF00" />
</div>
<div class="option-row" id="">
<label for="fontFamily">Font Family:</label>
<input type="text" id="fontFamily" value="Calibri" />
</div>
<div class="option-row" id="">
<label for="fontSize">Font Size:</label>
<input type="number" id="fontSize" step="1" min="0" max="100" value="1" />
</div>
<hr>
<div class="option-row" id="">
<label for="border-color">Border Color:</label>
<input type="text" id="border-color" value="#00FF00" />
</div>
<div class="option-row" id="">
<label for="border-width">Border Width:</label>
<input type="number" id="border-width" step="1" min="0" max="100" value="1" />
</div>
<div class="option-row" id="">
<label for="border-transparency">Border Transparency:</label>
<input type="number" id="border-transparency" step="0.1" min="0" max="1" value="1" />
</div>
<div class="option-row">
<input type="button" id="apply" value="Set" />
</div>
</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;
}
.option-row {
font-size: 14px;
padding: 5px;
}
.option-row {
padding-bottom: 5px;
}
label {
display:inline-block;
}
input{
padding: 1px 8px;
box-sizing: border-box;
width: 100%;
}
select{
width: 100%;
}
input[type=checkbox] {
display: inline-block;
width: auto;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
