Canvas Developer Guide
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Subscribing to Parent Events
The following code example shows how to call the subscribe method so that a canvas app can subscribe to parent events. This example handles the onscroll event that fires when the user scrolls in the parent window.
1//Subscribe to the parent window onscroll event.
2Sfdc.canvas(function() {
3 sr = JSON.parse('<%=signedRequestJson%>');
4 // Capture the onScrolling event of the parent window
5 Sfdc.canvas.client.subscribe(sr.client,
6 {name : 'canvas.scroll', onData : function (event) {
7 console.log("Parent's contentHeight; " + event.heights.contentHeight);
8 console.log("Parent's pageHeight; " + event.heights.pageHeight);
9 console.log("Parent's scrollTop; " + event.heights.scrollTop);
10 console.log("Parent's contentWidth; " + event.widths.contentWidth);
11 console.log("Parent's pageWidth; " + event.widths.pageWidth);
12 console.log("Parent's scrollLeft; " + event.widths.scrollLeft);
13 }}
14 );
15});