Module press 

Press primitive: long-press detection + double-click recognizer.

Both signals are derived from existing low-level state:

• Long-press = entity carrying Pressed continuously for more than long_press_threshold (default 500 ms). Fires LongPressEvent once per press cycle. The marker PressStartedAt is auto-attached on Pressed insertion and removed on Pressed removal so a fresh press always starts a fresh timer.
• Double-click = two consecutive ClickEvents on the same entity within double_click_threshold (default 300 ms). Tracked in the LastClick resource.

Apps consume LongPressEvent / DoubleClickEvent just like any other Message - MessageReader<LongPressEvent> / MessageReader<DoubleClickEvent>.

Structs

LastClick

Last accepted click - drives the double-click detector.

PressConfig

Tunables. Re-read every frame so apps can mutate at runtime.

PressPlugin

Plugin: registers press-recognizer systems.

PressStartedAt

Auto-attached to every entity the moment it acquires Pressed. Carries the Instant the press began. Removed once the entity releases. Also marks whether a LongPressEvent has already fired for this press cycle so we don’t spam.

Constants

DEFAULT_DOUBLE_CLICK_MS

Default double-click window. Matches GTK / Windows defaults (~300ms).

DEFAULT_LONG_PRESS_MS

Default long-press threshold. Matches the W3C touch UI guideline.

DOUBLE_CLICK_RADIUS_PX

Maximum pointer travel between two clicks for them to still count as a double-click. Matches the GTK / Qt double-click slop (~5px): two clicks at opposite corners of one large entity are two singles, not a double.

Functions

attach_press_timer

Maintain PressStartedAt: attach on first frame an entity carries Pressed without a timer, remove when Pressed disappears.

detect_double_click

Detect double-click by tracking the last-seen ClickEvent target + time. Two clicks on the same entity within cfg.double_click fire a DoubleClickEvent; the cache resets so a third click within the window is a new first click.

detect_long_press

Emit LongPressEvent for entities pressed past the threshold. Once per press cycle (gated by PressStartedAt::long_fired).