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E R j e c t e d

Ignorant WebView tags html anchor

I use a WebView in my application of waterfalls to view help for the application. Many of the pages have hyperlinks to topics about other help pages, but WebView not scrolls at anchor on the other page.

I tested my help html in Chrome is WebKit based too and makes the same as display Web help. I discovered that Chrome seems to apply HTML5 and so has removed in favour of the , because the "name" attribute is deprecated in HTML5. This solved the problem in Chrome, which also was not scrolling to the anchor on the page target, but it has no effect in the Web mode. It will not even go down until in the right place even when the anchor tags using id rather than by name.

Has anyone else experienced this and more importanly, nobody knows how to get the anchor tags to work properly in a WebView? Some of my help topics are quite long, and used reading all the way until you find a subject from another page is not very friendly.

Thank you.

OK, I came up with my own solution to this. I can't understand why the WebView does not respect the hash of the anchor on the URL, but for now, it works like a charm.

I had the idea of trying to run JavaScript in the WebView force it to scroll when I wanted to. The general consensus among developers JS, is that all you have to do is this:

location.hash = 'anchorID';

.. who can work very well for good browsers, but everything he says WebView do a reload the page with the hash plated anchor on the end, even once, what he does, but of course he simply ignores the anchor again. After some research, I found an another guru that suggests something completely different. So different in fact that readers of the forum was laughing that it wouldn't work, and anyway it was too complicated compared to the idea of location.hash . As soon as I saw him, but I knew it was probably solve my problem. The simple JavaScript snippet that he provided looked something like this:

element = document.getElementById('" + anchorID + "');
element.scrollIntoView();

I've expanded this nugget of kernel in this:

WebView {
   onLoadingChanged: {
      var token;
      if (loadRequest.status == WebLoadStatus.Succeeded) {
         var tempStr = url.toString();
         var hashIndex = tempStr.lastIndexOf("#");
         if (hashIndex > -1) {
            // ---There is an anchor hash on the end of the URL. Force WebView to use it.
            var tempStr = tempStr.substring(hashIndex + 1);
            token = evaluateJavaScript("element = document.getElementById('" + tempStr + "');element.scrollIntoView();");
         }
      }
   }
}

Basically what this does that get a # character at the end of the URL, and if there are any characters after it are passed to JavaScript which seeks the element and then scrolls to it. Note that, because this script using getElementById() you must set your anchor points with the id = "" attribute. " If you want to use the old style that should work too, but I have not tried. Something like that...

evaluateJavaScript("element = document.getElementsByName('" + tempStr + "')[0];element.scrollIntoView();");

This example assumes that you have only one element on the page with this name. If this isn't the case, you will need to change appropriately array index.

Hope this helps someone.

UPDATE: Just tested the alternative version using getElementsByName() and it works perfectly also. Just be sure to have only one of the items on each page with the name of the anchor. Unlike identifiers, names must be unique.

Tags: BlackBerry Developers

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< s="" t="" y="" l="" e="">

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