3.18 event%

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2 | Widget Gallery
3 | Windowing Classes
4 | Windowing Functions
5 | Editors
6 | Snip and Style Classes
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10 | Preferences
11 | Dynamic Loading
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13 | Init Libraries
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▼ | 3 | Windowing Classes

3.1 | area<%>
3.2 | area-container<%>
3.3 | area-container-window<%>
3.4 | button%
3.5 | canvas<%>
3.6 | canvas%
3.7 | check-box%
3.8 | checkable-menu-item%
3.9 | choice%
3.10 | clipboard-client%
3.11 | clipboard<%>
3.12 | combo-field%
3.13 | control<%>
3.14 | column-control-event%
3.15 | control-event%
3.16 | cursor%
3.17 | dialog%
3.18 | event%
3.19 | frame%
3.20 | gauge%
3.21 | group-box-panel%
3.22 | grow-box-spacer-pane%
3.23 | horizontal-pane%
3.24 | horizontal-panel%
3.25 | key-event%
3.26 | labelled-menu-item<%>
3.27 | list-box%
3.28 | list-control<%>
3.29 | menu%
3.30 | menu-bar%
3.31 | menu-item<%>
3.32 | menu-item%
3.33 | menu-item-container<%>
3.34 | message%
3.35 | mouse-event%
3.36 | pane%
3.37 | panel%
3.38 | popup-menu%
3.39 | printer-dc%
3.40 | radio-box%
3.41 | selectable-menu-item<%>
3.42 | separator-menu-item%
3.43 | scroll-event%
3.44 | slider%
3.45 | subarea<%>
3.46 | subwindow<%>
3.47 | tab-panel%
3.48 | text-field%
3.49 | timer%
3.50 | top-level-window<%>
3.51 | vertical-pane%
3.52 | vertical-panel%
3.53 | window<%>

On this page:

event%
new
get-time-stamp
set-time-stamp

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(require racket/gui/event) | package: gui-lib

The bindings documented in this section are also provided by the racket/gui/base library.

Changed in version 7.3.0.1 of package gui-lib: Added racket/gui/event that exports event% and subclasses.

class event% : class?
superclass: object%

An event% object contains information about a control, keyboard, mouse, or scroll event. See also control-event%, key-event%, mouse-event%, and scroll-event%.

> > constructor (new event% [[time-stamp time-stamp]]) → (is-a?/c event%)
> > time-stamp : exact-integer? = 0

> See get-time-stamp for information about time-stamp.

> > method (send an-event get-time-stamp) → exact-integer?

> Returns a time, in milliseconds, when the event occurred.

> This time is not necessarily compatible with times reported by Racket’s current-milliseconds procedure. It may be based on milliseconds since the system was rebooted. It may also “wrap around” (instead of always increasing) due to the system’s representation of time.

> > method (send an-event set-time-stamp time) → void?
> > time : exact-integer?

> Set a time, in milliseconds, when the event occurred. See also get-time-stamp.

> If the supplied value is outside the platform-specific range of time values, an exn:fail:contract exception is raised.

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