Module popup

Popup widget and properties.

A popup is a temporary flyover inserted as a top-most layer using POPUP service. The service works as an extension of the LAYERS service that implements the concept of open and close and close requests. The Popup! widget is a styleable container that is a good popup root widget.

use zng::prelude::*;


let mut popup = None;
let is_closed = var(true);
Button! {
    layout::align = layout::Align::CENTER;
    child = Text!(is_closed.map(|&b| if b { "Open Popup" } else { "Close Popup" }.into()));
    on_click = hn!(|_| {
        if is_closed.get() {
            let p = POPUP.open(zng::popup::Popup! {
                child = Text!("Popup content!");
            });
            p.bind_map(&is_closed, |s| matches!(s, zng::popup::PopupState::Closed)).perm();
            popup = Some(p);
        } else if let Some(p) = popup.take() {
            POPUP.close(&p);
        }
    })
}

The example above declares a button that opens and closes a popup

Note that the toggle widget provides a combo style and the checked_popup property that implements a similar behavior.

Full API

See zng_wgt_layer::popup for the full widget API.

Structs

• DefaultStyle
  W Popup default style.
• POPUP
  Popup service.
• Popup
  W An overlay container.
• PopupCloseRequestedArgs
  Arguments for POPUP_CLOSE_REQUESTED_EVENT.

Enums

• ContextCapture
  Defines if a Popup! captures the build/instantiation context.
• PopupCloseMode
  Optional parameter for POPUP_CLOSE_CMD.
• PopupState
  Identifies the lifetime state of a popup managed by POPUP.

Statics

• POPUP_CLOSE_CMD
  Close the popup.
• POPUP_CLOSE_REQUESTED_EVENT
  Closing popup event.

Functions

• anchor_mode
  P Defines the popup placement and size for popups open by the widget or descendants.
• close_delay
  P Delay awaited before actually closing when popup close is requested.
• close_on_focus_leave
  P Popup behavior when it loses focus.
• context_capture
  P Defines if the popup captures the local context to load in the popup context.
• is_close_delaying
  P If close was requested for this layered widget and it is just awaiting for the close_delay.
• on_popup_close_requested
  P Closing popup event.
• on_pre_popup_close_requested
  P Preview on_popup_close_requested event.
• style_fn
  P Extends or replaces the widget style.