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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License in the LICENSE-APACHE file or at:
// https://www.apache.org/licenses/LICENSE-2.0
//! Dialog boxes
//!
//! KAS dialog boxes are pre-configured windows, usually allowing some
//! customisation.
//!
//! # Design status
//!
//! At the current time, only a minimal selection of dialog boxes are provided
//! and their design is likely to change.
use crate::{adapt::AdaptWidgetAny, Button, EditBox, Filler, Label};
use kas::event::{Command, Key};
use kas::prelude::*;
use kas::text::format::FormattableText;
#[derive(Copy, Clone, Debug)]
struct MessageBoxOk;
impl_scope! {
/// A simple message box.
#[widget{
layout = column! [self.label, self.button];
}]
pub struct MessageBox<T: FormattableText + 'static> {
core: widget_core!(),
#[widget]
label: Label<T>,
#[widget]
button: Button<Label<&'static str>>,
}
impl Self {
/// Construct
pub fn new(message: T) -> Self {
MessageBox {
core: Default::default(),
label: Label::new(message),
button: Button::new_msg(Label::new("Ok"), MessageBoxOk).with_access_key(Key::Enter),
}
}
/// Build a [`Window`]
pub fn into_window<A: 'static>(self, title: impl ToString) -> Window<A> {
Window::new(self.map_any(), title)
.with_restrictions(true, true)
}
}
impl Events for Self {
type Data = ();
fn handle_messages(&mut self, cx: &mut EventCx, _: &Self::Data) {
if let Some(MessageBoxOk) = cx.try_pop() {
cx.send_action(Action::CLOSE);
}
}
fn configure(&mut self, cx: &mut ConfigCx) {
cx.enable_alt_bypass(self.id_ref(), true);
}
}
}
/// Message sent by [`TextEdit`] on closure.
#[derive(Debug)]
pub enum TextEditResult {
Cancel,
Ok(String),
}
#[derive(Clone, Debug)]
struct MsgClose(bool);
impl_scope! {
#[widget{
layout = grid! {
(0..3, 0) => self.edit,
(0, 1) => Filler::maximize(),
(1, 1) => Button::label_msg("&Cancel", MsgClose(false)),
(2, 1) => Button::label_msg("&Save", MsgClose(true)),
};
}]
/// An editor over a `String`
///
/// Emits a [`TextEditResult`] message when the "Ok" or "Cancel" button is
/// pressed. When used as a pop-up, it is up to the caller to close on this
/// message.
pub struct TextEdit {
core: widget_core!(),
#[widget]
edit: EditBox,
}
impl Self {
/// Construct
pub fn new(text: impl ToString, multi_line: bool) -> Self {
TextEdit {
core: Default::default(),
edit: EditBox::text(text).with_multi_line(multi_line),
}
}
/// Set text
pub fn set_text(&mut self, text: impl ToString) -> Action {
self.edit.set_string(text.to_string())
}
/// Build a [`Window`]
pub fn into_window<A: 'static>(self, title: impl ToString) -> Window<A> {
Window::new(self.map_any(), title)
}
fn close(&mut self, cx: &mut EventCx, commit: bool) -> IsUsed {
cx.push(if commit {
TextEditResult::Ok(self.edit.get_string())
} else {
TextEditResult::Cancel
});
Used
}
}
impl Events for Self {
type Data = ();
/* NOTE: this makes sense for a window but not an embedded editor.
fn configure(&mut self, cx: &mut ConfigCx) {
cx.register_nav_fallback(self.id());
// Focus first item initially:
if cx.nav_focus().is_none() {
cx.next_nav_focus(self.id(), false, FocusSource::Synthetic);
}
}*/
fn handle_event(&mut self, cx: &mut EventCx, _: &Self::Data, event: Event) -> IsUsed {
match event {
Event::Command(Command::Escape, _) => self.close(cx, false),
Event::Command(Command::Enter, _) => self.close(cx, true),
_ => Unused,
}
}
fn handle_messages(&mut self, cx: &mut EventCx, _: &Self::Data) {
if let Some(MsgClose(commit)) = cx.try_pop() {
let _ = self.close(cx, commit);
}
}
}
}