Zoom operations
Ctrl + Mousewheel
Status bar zoom indicator
Double fingers operation, touchable only
Use API sheet.zoom(zoomFactor)
AllowUserZoom
We provide a spread option called allowUserZoom to control whether sheet viewport could be zoomed:
Get or set zoom factor through API
ViewZooming / ViewZoomed Events
In order to intervene in the zooming process on different worksheets / spreads instance, we provide two events:
GC.Spread.Sheets.Events.ViewZooming
The available arguments in its handler function:
sheet: The sheet that triggered the event.
sheetName: The sheet's name.
newZoomFactor: The new zoom factor, user could make some change to intervene the real zoom action.
oldZoomFactor: The old zoom factor.
cancel: A value that indicates whether the operation should be canceled.
GC.Spread.Sheets.Events.ViewZoomed
The available arguments in its handler function:
sheet: The sheet that triggered the event.
sheetName: The sheet's name.
newZoomFactor: The new zoom factor, user could make some change to intervene the real zoom action.
oldZoomFactor: The old zoom factor.
window.onload = function() {
var spread = new GC.Spread.Sheets.Workbook(document.getElementById("ss"));
initStatusBar(spread);
initSpread(spread);
initEvents(spread);
};
function initStatusBar(spread) {
var statusBarDOM = document.getElementById('statusBar');
var statusBar = new GC.Spread.Sheets.StatusBar.StatusBar(statusBarDOM);
statusBar.bind(spread);
}
function initSpread(spread) {
var sheet = spread.getActiveSheet();
}
function initEvents(spread) {
var zoomFactorDOM = document.getElementById('zoomFactor');
var limitSwitch = document.getElementById('useLimit');
var maxZoomDOM = document.getElementById('maxZoom');
var minZoomDOM = document.getElementById('minZoom');
zoomFactorDOM.addEventListener('input', function() {
var sheet = spread.getActiveSheet();
if (sheet) {
var zoomFactor = parseFloat(this.value);
var useLimit = limitSwitch.checked;
var maxZoomFactor = parseFloat(maxZoomDOM.value),
minZoomFactor = parseFloat(minZoomDOM.value);
if (useLimit) {
if (zoomFactor >= maxZoomFactor) {
zoomFactor = maxZoomFactor;
}
if (zoomFactor <= minZoomFactor) {
zoomFactor = minZoomFactor;
}
}
zoomFactorDOM.value = zoomFactor;
sheet.zoom(zoomFactor);
}
});
limitSwitch.addEventListener('change', syncDOM);
spread.bind(GC.Spread.Sheets.Events.ViewZooming, function (e, args) {
var useLimit = limitSwitch.checked;
var maxZoomFactor = parseFloat(maxZoomDOM.value),
minZoomFactor = parseFloat(minZoomDOM.value);
if (useLimit) {
if (args.newZoomFactor >= maxZoomFactor) {
args.newZoomFactor = maxZoomFactor;
}
if (args.newZoomFactor <= minZoomFactor) {
args.newZoomFactor = minZoomFactor;
}
}
zoomFactorDOM.value = args.newZoomFactor;
});
syncDOM();
}
function syncDOM() {
var limitSwitch = document.getElementById('useLimit');
var maxZoomDOM = document.getElementById('maxZoom');
var minZoomDOM = document.getElementById('minZoom');
var maxZoomParentDOM = maxZoomDOM.parentNode;
var minZoomParentDOM = minZoomDOM.parentNode;
var useLimit = limitSwitch.checked;
if (useLimit) {
maxZoomParentDOM.classList.remove('hide');
minZoomParentDOM.classList.remove('hide');
} else {
maxZoomParentDOM.classList.add('hide');
minZoomParentDOM.classList.add('hide');
}
}
<!doctype html>
<html style="height:100%;font-size:14px;">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" type="text/css" href="$DEMOROOT$/en/purejs/node_modules/@mescius/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
<script src="$DEMOROOT$/en/purejs/node_modules/@mescius/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="$DEMOROOT$/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="spread-container">
<div id="ss" class="sample-spreadsheets"></div>
<div id="statusBar"></div>
</div>
<div class="options-container">
<div class="option-row">
<label>Slide to zoom active sheet:</label>
<div class="input">
<label class="inline-label">0.25</label>
<input id="zoomFactor" type="range" name="points" min="0.25" max="4" value="1" step="0.01"/>
<label class="inline-label">4</label>
</div>
</div>
<div class="option-row">
<input id="useLimit" type="checkbox" />
<label for="useLimit" class="inline-label">Limit the zoom factor</label>
</div>
<div class="option-row">
<label for="maxZoom">The max zoom factor:</label>
<input id="maxZoom" type="number" min="0.25" max="4" value="4" step="0.1" />
</div>
<div class="option-row">
<label for="minZoom">The min zoom factor:</label>
<input id="minZoom" type="number" min="0.25" max="4" value="0.25" step="0.1" />
</div>
</div>
</div></body>
</html>
.sample-tutorial {
position: relative;
height: 100%;
overflow: hidden;
}
.spread-container {
width: calc(100% - 280px);
height: 100%;
overflow: hidden;
float: left;
}
.sample-spreadsheets {
width: 100%;
height: calc(100% - 30px);
}
#statusBar {
width: 100%;
height: 30px;
}
.inline-label {
display: inline-block;
}
.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[type=button] {
margin-top: 6px;
display: block;
padding: 4px 6px;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
.hide {
display: none !important;
}
.inputbox input {
display: inline-block;
}
