纯前端表格控件SpreadJS开发教程：如何设置Excel背景样式-控件新闻-慧都网

纯前端表格控件SpreadJS开发教程：如何设置Excel背景样式

转帖|使用教程|编辑：鲍佳佳|2021-02-22 13:05:54.817|阅读 320 次

概述：此示例显示如何自定义工作簿背景。

SpreadJS是一款基于 HTML5 的纯前端表格控件，兼容 450 种以上的 Excel 公式，具备“高性能、跨平台、与 Excel 高度兼容”的产品特性可为用户带来亲切、易用的使用体验，并满足 Web Excel组件开发、表格文档协同编辑、数据填报、类Excel报表设计等业务场景，可极大降低企业研发成本和项目交付风险。

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此示例显示如何自定义工作簿背景。

你可以设置 backColor 或者 backgroundImage 选项为每一个表单设置背景色或者背景图片。如果你同时设置背景色和背景图片, 那么背景图片将会优先显示。

    var spread = GC.Spread.Sheets.findControl(document.getElementById('ss'));      // set the worksheet's backcolor      spread.options.backColor = 'red';      // and set the surrounding area      spread.options.grayAreaBackColor = 'gray';

或者，您可以使用workbook的** backgroundImage **选项为工作表设置背景图像。请注意，设置背景图像会覆盖所有设置的背景颜色，因此必须将其删除才能使背景颜色生效。

    var spread = GC.Spread.Sheets.findControl(document.getElementById('ss'));      // Set a background image for the sheets      spread.options.backgroundImage = 'images/backImage.png';

SpreadJS 提供控制图片布局方式的能力, 你可以设置 backgroundImageLayout 选项来完成此目标。图片布局包含以下几种类型:

stretch: 改变图像尺寸使其充满整个区域,无视实际的长宽比。
center: 图片将显示在区域的正中央。
zoom: 改变图像的尺寸使其适合控件尺寸,图片实际的长宽比不变。
none: 在显示区域中使用图像实际的尺寸显示该图像,没有任何尺寸变化。

    spread.options.backgroundImageLayout = GC.Spread.Sheets.ImageLayout.stretch;      //spread.options.backgroundImageLayout = GC.Spread.Sheets.ImageLayout.center;      //spread.options.backgroundImageLayout = GC.Spread.Sheets.ImageLayout.zoom;      //spread.options.backgroundImageLayout = GC.Spread.Sheets.ImageLayout.none;

你也可以设置 grayAreaBackColor 选项来设置表单灰色区域的背景色。

spread.options.grayAreaBackColor = 'gray';

app.js:

window.onload =  function() {
	var spread = new GC.Spread.Sheets.Workbook(_getElementById('ss'), { sheetCount: 1 });
	initSpread(spread);
};

function initSpread(spread) {
	var spreadNS = GC.Spread.Sheets;
	var sheet = spread.getSheet(0);
	var pictureUrl = '';
	spread.suspendPaint();
	sheet.setRowCount(15);
	sheet.setColumnCount(20);
	spread.options.backColor = 'white';
	spread.options.grayAreaBackColor = 'gray';
	spread.options.backgroundImageLayout = spreadNS.ImageLayout.stretch;
	spread.options.backgroundImage = '$DEMOROOT$/spread/source/images/backImage.png';

	spread.resumePaint();

	_getElementById('layout').addEventListener('change',function() {
		var layout = parseInt(document.getElementById('layout').value);
		spread.options.backgroundImageLayout = layout;
	});

	_getElementById('setGrayAreaBackColor').addEventListener('click', function() {
		var color = document.getElementById('grayAreaBackColor').value;
		spread.options.grayAreaBackColor = color;
	});
	_getElementById('setSpreadBackColor').addEventListener('click', function() {
		var color = document.getElementById('spreadBackColor').value;
		spread.options.backColor = color;
	});
	_getElementById('file_input').addEventListener('change', function() {
        var file = this.files[0];
		if (!/image\/\w+/.test(file.type)) {
			alert('The file muse be image!');
			return false;
		}
		var reader = new FileReader();
		reader.readAsDataURL(file);
		reader.onload = function(e) {
			pictureUrl = this.result;
		};
	});
	_getElementById('setSpreadBackgroundImage').addEventListener('click', function() {
		spread.options.backgroundImage = pictureUrl;
	});
	_getElementById('delSpreadBackgroundImage').addEventListener('click', function() {
		spread.options.backgroundImage = '';
	});
}

function _getElementById(id){
    return document.getElementById(id);
}

index.html:

<!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/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
    <script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity/spread-sheets/dist/gc.spread.sheets.all.min.js" type="text/javascript"></script>
    <script src="$DEMOROOT$/zh/purejs/node_modules/@grapecity/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 >Enter a color name to set the color of the workbook gray area.</label>
            </div>
            <div class="option-row">
                <input type="text" id="grayAreaBackColor"/>
                <input type="button" id="setGrayAreaBackColor" value="Set Gray Area BackColor"/>
            </div>
            <div class="option-row">
                <label >Enter a color name to set the workbook background color.</label>
                <label class="note">Note: remove background image at the bottom to see this change.</label>
            </div>
            <div class="option-row">
                <input type="text" id="spreadBackColor"/>
                <input type="button" id="setSpreadBackColor" value="Set Workbook BackColor"/>
            </div>
            <div class="option-row">
                <label >Image:</label>
                <input type="file" name="image" id="file_input" />
                
            </div>
            <div class="option-row">
                <label >Workbook Background Image Layout:</label>
                <select id="layout" >
                    <option value="0" selected="selected">Stretch</option>
                    <option value="1">Center</option>
                    <option value="2">Zoom</option>
                    <option value="3">None</option>
                </select>
            </div>
            <div class="option-row">
                <input type="button" id="setSpreadBackgroundImage" value="Set" class="narrow-button" />
                <input type="button" id="delSpreadBackgroundImage" value="Del Background Image" />
            </div>
        </div>
    </div>
</body>
</html>

style.css:

input[type="button"] {
    width: 180px;
}

input[type="text"] {
    padding: 4px;
    margin-top: 4px;
    width: 100%;
    box-sizing: border-box;
}

label {
    display: inline-block;
    margin-bottom: 6px;
}
.note{
    margin-top: 0px;
}
.colorLabel {
    background-color: lavender;
}

.wide-label {
    width: 260px;
}

input.narrow-button, .narrow-label {
    width: 74px;
}
.sample-tutorial {
     position: relative;
     height: 100%;
     overflow: hidden;
}

.sample-spreadsheets {
    width: calc(100% - 300px);
    height: 100%;
    overflow: hidden;
    float: left;
}

.options-container {
    float: right;
    width: 300px;
    padding: 12px;
    height: 100%;
    box-sizing: border-box;
    background: #fbfbfb;
    overflow: auto;
}
.option-row:nth-child(1){
    padding-bottom: 0px;
}
.option-row:nth-child(2){
    margin-top: 0px;
    padding-top: 0px;
}
.option-row:nth-child(3){
    padding-bottom: 0px;
}

.option-row:nth-child(4){
    margin-top: 0px;
    padding-top: 0px;
}
.option-row {
    font-size: 14px;
    padding: 5px;
    margin-top: 10px;
}

input {
    padding: 4px 6px;
}

input[type=button] {
    margin-top: 6px;
    display: block;
}

hr {
    border-color: #fff;
    opacity: .2;
    margin-top: 20px;
}

    
body {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

本文转载自：葡萄城

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