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Show animated loading icon if page renders slow

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Artur Adib 2012-01-31 16:20:09 -05:00
parent 2047fba8cb
commit 47f24cd27b
3 changed files with 41 additions and 12 deletions
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39
web/viewer.js
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@ -790,6 +790,10 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
div.appendChild(canvas);
this.canvas = canvas;
var loadingIconDiv = document.createElement('div');
loadingIconDiv.className = 'loadingIcon';
div.appendChild(loadingIconDiv);
var textLayerDiv = null;
if (!PDFJS.disableTextLayer) {
textLayerDiv = document.createElement('div');
@ -809,19 +813,30 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
ctx.restore();
ctx.translate(-this.x * scale, -this.y * scale);
stats.begin = Date.now();
this.content.startRendering(ctx,
(function pageViewDrawCallback(error) {
if (error)
PDFView.error('An error occurred while rendering the page.', error);
this.updateStats();
if (this.onAfterDraw)
this.onAfterDraw();
// Rendering area
cache.push(this);
callback();
}).bind(this), textLayer
);
var self = this;
// Display loading icon if page hasn't finished rendering after XXXX ms
var loadingTimer = setTimeout(function loadingTimerCallback() {
loadingIconDiv.classList.add('show');
}, 1000);
stats.begin = Date.now();
this.content.startRendering(ctx, function pageViewDrawCallback(error) {
clearTimeout(loadingTimer);
loadingIconDiv.classList.remove('show');
if (error)
PDFView.error('An error occurred while rendering the page.', error);
self.updateStats();
if (self.onAfterDraw)
self.onAfterDraw();
cache.push(self);
callback();
}, textLayer);
setupAnnotations(this.content, this.scale);
div.setAttribute('data-loaded', true);