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XML is an HTML-like language which is used to define the primary graphical user interface (also known as "GUI_Controls") of the game. When a window pops up, the XML language was used to define that window, and the buttons, icons, and checkboxes upon it. Each of those buttons or other objects is a separate node, of the archetype GUIControl. Just like other nodes, they have classes and fields, with data in those fields. Scripts can also be attached to these nodes that trigger on GUI Events (such as a KeyPress or MouseClick). So when a user clicks on a button, that button can then call a script which will affect other things in the game, change the window's appearance, or even create other windows.

Creating a GUIXML File

Just as scripts have a .hsl extension and are placed in a repository's HeroScript folder, GUIXML files have a .xml extension, and are placed in a repository's GUIXML folder. Ways of adding new GUIXML are as follows:

It is also possible to use HSL to create a node based on an existing GUIXML prototype, and then modify its various properties in the script. For example, creating a button from a button prototype, and then changing the color that it turns when the mouse hovers over it, from its default color, to red.

The Structure of a GUIXML File

GUIXML files are comprised of a primary building block: The building of control elements. An element might be a button, checkbox, text input box, radio button, panel with several buttons, or even an entire window which has several of the other elements upon it.

Many of the core elements have already been defined in GUIXML.xml files, and new files can be created as needed. All of the Clean Engine .xml files are listed in _HEGUIXML.lst (which can be viewed via the Script Editor in the GUIXML category). Game-specific GUIXML files should be listed in the GUIXML.lst file.

There are several predefined classes which can be used. For more information on the classes and fields, please see the GUI Controls page.

Examining a GUIXML File

To look at the GUIXML of a current prototype, use the script editor. For example:

Be careful not to make any changes!

The core elements of the GUIXML file start with a < tag, and end with a /> tag. For example:

  <size x='100' y='29'/>

Sometimes there will be subfields that need to be set, in which case the first line opens the structure, and the last line closes it. For example:

  <label name='text' dockMode='FILL' text="Button A">
    <textFormat center='true' vcenter='true' wordBreak='false' singleLine='true'/>

In most cases though, you will not need to modify the GUIXML directly unless there is a problem. Simply use the GUIEditor, and let it handle the GUIXML changes.

Quotes can be either single-quote (') or double-quote ("), as long as both opening and closing quotes match.

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