在你通过 API 或行为改变 Spread 之后, 控件需要处理这些改变, 然后进行重绘。
大多数时候, 在你改变 Spread 之后, 控件会自动刷新以达到重绘和更新状态的目的。 可是, 如果你一次做出大量的改变, 并且不希望每次改变都去重新绘制 Spread , 那么你可以调用 suspendPaint 暂停重绘， 完成改变之后，你可以调用resumePaint 重新激活Spread重绘，例如:
如果你的代码逻辑对控件进行修改，但控件未进行自刷新，那么你可以调用repaint方法强制刷新。
window.onload = function() {
var spread = new GC.Spread.Sheets.Workbook(_getElementById('ss'), { sheetCount: 1 });
initSpread(spread);
};
function initSpread(spread) {
spread.suspendPaint();
spread.getSheet(0);
var sheet = spread.getActiveSheet();
spread.resumePaint();
_getElementById('btnAddSheet').addEventListener('click', function() {
spread.addSheet(0);
});
_getElementById('suspendPaint').addEventListener('click', function() {
spread.suspendPaint();
});
_getElementById('resumePaint').addEventListener('click', function() {
spread.resumePaint();
});
}
function _getElementById(id){
return document.getElementById(id);
}
<!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="$DEMOROOT$/spread/source/data/data.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">
<div class="option-row">
<label>Click buttons to suspend and resume painting the Spread component, and see how actions are
affected by that state.</label>
</div>
1. Click 'Suspend Paint' <input type="button" id="suspendPaint" value="Suspend Paint" />
<br />
2. Add various sheets <input type="button" id="btnAddSheet" value="Add Sheet" />
<br />
3. Click 'Resume Paint' <input type="button" id="resumePaint" value="Resume Paint" />
<div class="option-row">
<label>The rendering performance improves when using suspendPaint/ResumePaint functionality. </label>
</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;
margin-top: 10px;
}
label {
display: block;
margin-bottom: 6px;
}
input {
padding: 4px 6px;
}
input[type=button] {
margin-top: 16px;
display: block;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
