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How to set Delphi WebBrowser Base directory different that HTML location

Answer 1

A:

If the HTML file is stored in the same folder as the JPGs, then there is no need to set a base path.

An HTML file's base path is the path from which it is loaded, or a path specified in the HTML itself via a <base href="..."> tag. You can set a new base path, which is accessible via the IHTMLDocument2.all.tags('base') collection, but it is not accessible until after the HTML file has been loaded and parsed first, which is a catch-22 for you. You cannot set a base path without having a document loaded beforehand.

Remy Lebeau - TeamB 2010-04-21 23:08:04

Answer 2

A:

Since TWebBrowser is just a wrapper around the Internet Explorer engine, there is an alternative you can try if you allow client-side scripting to be enabled in your browser.

Create an Automation object in your app that implements the IDispatch interface, and give it a string property that returns the app's current running path.
Create an Automation object that implements the IDocHostUIHandler interface, and override its GetExternal() method to return a pointer to your object from #1.
Retreive the browser's ICustomDoc interface, and pass your IDocHostUIHandler object to its SetUIHandler() method.

Refer to MSDN for more details:

http://msdn.microsoft.com/en-us/library/aa770041.aspx

This way, your HTML can contain scripting that can use the window.external object to retreive the app's path and update its JPG references dynamically, such as in the OnLoad event, ie:

<script language="JScript">
function UpdateJPGs()
{
  var path = window.external.ExePath;
  document.images.item("jpg1").src = path + "1.jpg";
  document.images.item("jpg2").src = path + "2.jpg";
  // etc...
}
</script>

<body onLoad="UpdateJPGs">

Remy Lebeau - TeamB 2010-04-21 23:22:21

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How to set Delphi WebBrowser Base directory different that HTML location

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