50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
define("dijit/Viewport", [
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"dojo/Evented",
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"dojo/on",
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"dojo/ready",
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"dojo/sniff",
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"dojo/_base/window", // global
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"dojo/window" // getBox()
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], function(Evented, on, ready, has, win, winUtils){
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// module:
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// dijit/Viewport
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/*=====
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return {
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// summary:
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// Utility singleton to watch for viewport resizes, avoiding duplicate notifications
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// which can lead to infinite loops.
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// description:
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// Usage: Viewport.on("resize", myCallback).
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//
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// myCallback() is called without arguments in case it's _WidgetBase.resize(),
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// which would interpret the argument as the size to make the widget.
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};
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=====*/
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var Viewport = new Evented();
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ready(200, function(){
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var oldBox = winUtils.getBox();
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Viewport._rlh = on(win.global, "resize", function(){
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var newBox = winUtils.getBox();
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if(oldBox.h == newBox.h && oldBox.w == newBox.w){ return; }
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oldBox = newBox;
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Viewport.emit("resize");
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});
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// Also catch zoom changes on IE8, since they don't naturally generate resize events
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if(has("ie") == 8){
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var deviceXDPI = screen.deviceXDPI;
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setInterval(function(){
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if(screen.deviceXDPI != deviceXDPI){
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deviceXDPI = screen.deviceXDPI;
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Viewport.emit("resize");
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}
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}, 500);
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}
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});
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return Viewport;
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});
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