当scrollByPixel为true时，SpreadJS将启用按像素的精确滚动。
此外，您还可以定义当scrollByPixel为true时一次滚动的像素数。
最终的滚动像素是滚动增量乘以scrollPixel的结果。
例如，滚动增量为3，scrollPixel为5，最终滚动像素为15。
Worksheet类型提供了scroll方法，用来滚动指定的像素位置。
这个scroll方法包含两个参数，vPixels 和 hPixels.
vPixels：表示竖直方向滚动的像素距离。
hPixels：表示水平方向滚动的像素距离。
当vPixels参数为正值时，表单会向下滚动，反之则向上滚动。
当hPixels参数为正值时，表单将向右滚动，反之则向左滚动。
当Workbook的scrollByPixel为true时，表单将滚动到对应行列的偏移位置，反之，当scrollByPixel为false时，那么将直接滚动到所在行列的准确位置，而不会产生任何偏移。
当Excel中的ScrollByPixel选项被设置为False时，工作表会滚动到新的顶部行/左侧列的索引位置，并且新的顶部行/左侧列的偏移量将始终为0。
在 TopRowChanged / LeftColumnChanged 事件中，您可以使用 offset 属性来获取单元格中当前位置的信息。
如果你想使用 oldOffset/newOffset 属性，你可以这样做
window.onload = function() {
var spread = new GC.Spread.Sheets.Workbook(_getElementById('ss'), { sheetCount: 1 });
initSpread(spread);
};
function initSpread(spread) {
/* Binding settings */
var scrollByPixel = _getElementById("scrollByPixel");
scrollByPixel.addEventListener("change", function () {
spread.options.scrollByPixel = scrollByPixel.checked;
});
var scrollPixel = _getElementById("scrollPixel");
_getElementById("setScrollPixel").addEventListener("click", function () {
spread.options.scrollPixel = parseInt(scrollPixel.value);
});
_getElementById("scroll").addEventListener("click", function () {
var vPixels = parseFloat(_getElementById("vPixels").value);
var hPixels = parseFloat(_getElementById("hPixels").value);
var sheet = spread.getActiveSheet();
sheet.scroll(vPixels, hPixels);
});
var intervalID;
_getElementById("autoScroll").addEventListener("click", function () {
if (intervalID) {
window.clearInterval(intervalID);
intervalID = null;
}
var vPixels = parseFloat(_getElementById("vPixels").value);
var hPixels = parseFloat(_getElementById("hPixels").value);
var interval = parseInt(_getElementById("interval").value);
intervalID = setInterval(function () {
var sheet = spread.getActiveSheet();
sheet.scroll(vPixels, hPixels);
}, interval);
});
_getElementById("stopScroll").addEventListener("click", function () {
if (intervalID) {
window.clearInterval(intervalID);
intervalID = null;
}
});
spread.suspendPaint();
spread.options.scrollByPixel = true;
var sheet = spread.getActiveSheet();
//change cells dimensions
sheet.setColumnWidth(0, 150);
sheet.setColumnWidth(4, 100);
sheet.setColumnWidth(5, 430);
sheet.setRowHeight(0, 50);
sheet.setRowHeight(3, 10);
sheet.setRowHeight(10, 100);
sheet.setRowHeight(12, 475);
sheet.resumePaint();
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="$DEMOROOT$/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/data/data.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">
<p>Scroll the spreadsheet to view the pixel scrolling feature. </p>
<p>You can also change the number of pixels scrolled below by entering the number and press Set Scroll
Pixel.</p>
<p>To disable this feature, uncheck the option.</p>
<input type="checkbox" id="scrollByPixel" checked="checked" />
<label for="scrollByPixel">Scroll By Pixel</label>
</div>
<div class="option-row">
<input type="number" id="scrollPixel" value="5" />
<input type="button" id="setScrollPixel" value="Set Scroll Pixel" />
</div>
<div class="option-row">
<p>You can also scroll the sheet by specified pixels.</p>
<label>
<input type="number" id="vPixels" value="1">
vPixels
</label>
<label>
<input type="number" id="hPixels" value="0">
hPixels
</label>
<input type="button" id="scroll" value="Scroll">
</div>
<div class="option-row">
<p>If you invoke the scroll method in a timer, the sheet can be scrolled automatically.</p>
<label>
<input type="number" id="interval" value="20">
interval(ms)
</label>
<input type="button" id="autoScroll" value="Automatically Scroll">
<input type="button" id="stopScroll" value="Stop Scroll">
</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 {
margin-bottom: 6px;
}
input {
padding: 3px;
margin: 3px;
}
input[type=number] {
width: 40px;
}
hr {
border-color: #fff;
opacity: .2;
margin-top: 20px;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
