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7.8

Trying to create element borders on mouseOver similar to the Developer ToolBar's "Select Element by Click"

Asked by minermadison in Internet Explorer Web Browser, Dynamic HTML (DHTML), JavaScript

Tags: Microsoft, Internet Explorer, 5.5+, Create an effect similar to the Developer Toolbar's "Select Element By Click:, C# BHO, Internet Explorer 5.5+

Hi, I'm creating a Browser Helper Object in C# and I have it installed and working. I'm trying to create a feature that will outline elements (give them visible borders) just like the Developer ToolBar for IE does when you use the "Select Element By Click" function.

First I tried to attach an onmouseenter event handler in the BHO for every function but that lead to terrible performance and made IE completely unusable...

So then I tried using style sheets. I added some styles to the page:
            mshtml.IHTMLStyleSheet sheet = IDoc.createStyleSheet("", -1);
      sheet.addRule(".applyBorder", "border:1px blue", 0);
      sheet.addRule(".removeBorder", "border:none", 1);

And added this to every elements tag:
                     onmouseover="this.className='applyBorder'"
                     onmouseout="this.className='removeBorder'"

This kinda worked but the borders just pile up. When you enter a child element the parent element still retains the border.... In fact it looks like the borders never disappear....

So, if anyone has some suggestions on how to programatically (through the BHO) or using CSS/JavaScript create this type of effect (where the one single element the mouse is hovering over has a border around it, exactly like the  Developer ToolBar's "Select Element By Click") that would be awesome!!!

Thanks in advance!
Related Solutions: CSS for TR/TBODY border/outline
[+][-]01/08/08 12:12 PM, ID: 20612229Accepted Solution

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About this solution

Zones: Internet Explorer Web Browser, Dynamic HTML (DHTML), JavaScript
Tags: Microsoft, Internet Explorer, 5.5+, Create an effect similar to the Developer Toolbar's "Select Element By Click:, C# BHO, Internet Explorer 5.5+
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Solution Provided By: mplungjan
Participating Experts: 1
Solution Grade: A
 
[+][-]01/07/08 11:31 PM, ID: 20606627Expert Comment

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[+][-]01/08/08 10:41 AM, ID: 20611309Author Comment

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[+][-]01/08/08 02:23 PM, ID: 20613616Author Comment

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[+][-]01/08/08 11:46 PM, ID: 20616199Expert Comment

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