► |  | Myster X: Using Windows COM Objects in Racket

1 | Overview
2 | COM
3 | Active X and DHTML
4 | Version
| Index

▼ | 3 | Active X and DHTML

3.1 | Browsers
3.2 | Documents
3.3 | HTML Events
3.4 | HTML and Dynamic HTML

On this page:

mx-browser%
current-document
print-document
show
navigate
navigate/ status
go-back
go-forward
refresh
iconize
restore
current-url
register-event-handler
unregister-event-handler
handle-events
stop-handling-events
block-while-browsers

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#### 3.1`` Browsers

mx-browser% : class?
superclass: object%

> ( new mx-browser% | [ | [label label] |
> |  | [width width] |
> |  | [height height] |
> |  | [x x] |
> |  | [y y]] |
> |  | [style-options style-options]) |

> → ( is-a?/c mx-browser% )
> label : string? = "MysterX"

> | width |  | : |  | ( or/c exact-nonnegative-integer? ( one-of/c 'default))
> |  |  | = |  | 'default

> | height |  | : |  | ( or/c exact-nonnegative-integer? ( one-of/c 'default))
> |  |  | = |  | 'default

> x : ( or/c exact-integer? ( one-of/c 'default)) = 'default
> y : ( or/c exact-integer? ( one-of/c 'default)) = 'default

> style-options

> :

> ( listof (any-of/c 'iconize 'maximize 'no-system-menu
> 'no-thick-border 'scrollbars))

> Creates an instance of a MysterX browser. The label argument is a string for the document caption, with default . The width, height, x, and y give the size and placement of the browser window on the desktop, with defaults provided by Windows. When style-options includes 'scrollbars, the vertical scrollbar is disabled if scrolling is unnecessary, and the horizontal scrollbar disappears if scrolling is unnecessary.

> Although the browser window cannot be hidden initially, it can be iconized. The restore method can be used to restore an iconized browser to an ordinary window.

> ( send a-mx-browser current-document )
> → ( is-a?/c mx-document<%> )

> Returns the current document in the browser.

> ( send a-mx-browser print-document ) → void?

> Prints the document displayed by the browser to the default printer. As an unintentional side-effect, the browser window is minimized.

> ( send a-mx-browser show show?) → void?
> show? : any/c

> If show? is #f, the browser window is hidden. Otherwise, the window is shown.

> ( send a-mx-browser navigate url) → string?
> url : string?

> Navigates the browser to the URL given by url. Any DHTML changes to the page associated with the URL are not shown. Returns a string that is the actual URL navigated to.

> ( send a-mx-browser navigate/status url)
> → ( list/c string? ( or/c false/c integer? ( one-of/c 'no-status)))
> url : string?

> Navigates the browser to the URL given by url. Any DHTML changes to the page associated with the URL are not shown. Returns a list, whose first element string that is the actual URL navigated to, and whose second element is a status code, one of: #f, indicating no status could be obtained; a number, such as 200 or 404, indicating the http status; or 'no-status, indicating that url does not denote a URL with the “http” scheme.

> ( send a-mx-browser go-back ) → string?

> Navigates the browser back to a URL within its history list. Any DHTML changes to the page associated with the URL are not shown. Returns a string that is the actual URL navigated to.

> ( send a-mx-browser go-forward ) → string?

> Navigates the browser forward to a URL within its history list. Any DHTML changes to the page associated with the URL are not shown. Returns a string that is the actual URL navigated to.

> ( send a-mx-browser refresh ) → boolean?

> Refreshes the document in the browser. Returns #t if the refresh is successful, #f otherwise.

> ( send a-mx-browser iconize ) → void?

> Iconizes the browser window.

> ( send a-mx-browser restore ) → void?

> Restores the browser window, if it has been iconized.

> ( send a-mx-browser current-url ) → string?

> Returns a string indicating the currently displayed URL.

> ( send a-mx-browser register-event-handler |  | elem |  |  |  |
> |  | f) |  | → |  | void?

> elem : ( is-a?/c mx-element% )
> f : (( is-a?/c mx-event<%> ) . -> . any )

> Registers an event handler for the HTML element elem. The result of f is discarded.

> ( send a-mx-browser unregister-event-handler elem) → void?
> elem : ( is-a?/c mx-element% )

> Unregisters an event handler for an HTML element in the browser.

> ( send a-mx-browser handle-events ) → void?

> Creates a thread to handle events using the registered event handlers.

> ( send a-mx-browser stop-handling-events ) → void?

> Kills the thread currently handling events for the browser.

( block-while-browsers ) → void?

Blocks until all browser windows have been closed or hidden, using the show method of mx-browser%. This is useful when a MysterX program file is run as a script, to prevent mzscheme or mred from closing prematurely.
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