▼ |  | Mr Lib: Extra GUI Libraries

1 | Aligned Pasteboard
2 | Bitmap Label
3 | Cache-image Snip
4 | Close Icon
5 | GIF and Animated GIF Writing
6 | Graphs
7 | Hierarchical List Control
8 | Include Bitmap
9 | Interactive Value Port
10 | Name Message
11 | Path Dialog
12 | Plot
13 | Switchable Button
14 | Image Core
15 | Matrix Snip
16 | Te X Table
17 | Acknowledgments
| Index

On this page:

set-interactive-display-handler
set-interactive-write-handler
set-interactive-print-handler

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### 9`` Interactive Value Port

(require mrlib/interactive-value-port)

> procedure (set-interactive-display-handler port) → void?
> port : output-port?

Sets port’s display handler (via port-display-handler) so that when it encounters these values:

- exact, real, non-integral numbers

- syntax objects

it uses write-special to send snips to the port, instead of those values. Otherwise, it behaves like the default handler.

To show values embedded in lists and other compound object, it uses pretty-print.

> procedure (set-interactive-write-handler port) → void?
> port : output-port?

Like set-interactive-display-handler, but sets the port-write-handler.

> procedure (set-interactive-print-handler port) → void?
> port : output-port?

Like set-interactive-display-handler, but sets the port-print-handler.
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