373 lines
12 KiB
Rust
373 lines
12 KiB
Rust
// Copyright 2022 System76 <info@system76.com>
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// SPDX-License-Identifier: MPL-2.0
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use crate::{ext::CollectionWidget, widget, Element};
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use apply::Apply;
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use derive_setters::Setters;
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use iced::{window, Length};
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use iced_core::{widget::tree, Widget};
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use std::borrow::Cow;
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#[must_use]
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pub fn header_bar<'a, Message>() -> HeaderBar<'a, Message> {
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HeaderBar {
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title: Cow::Borrowed(""),
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on_close: None,
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on_drag: None,
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on_maximize: None,
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on_minimize: None,
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on_right_click: None,
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start: Vec::new(),
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center: Vec::new(),
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end: Vec::new(),
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focused: false,
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}
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}
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#[derive(Setters)]
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pub struct HeaderBar<'a, Message> {
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/// Defines the title of the window
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#[setters(skip)]
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title: Cow<'a, str>,
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/// A message emitted when the close button is pressed.
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#[setters(strip_option)]
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on_close: Option<Message>,
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/// A message emitted when dragged.
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#[setters(strip_option)]
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on_drag: Option<Message>,
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/// A message emitted when the maximize button is pressed.
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#[setters(strip_option)]
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on_maximize: Option<Message>,
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/// A message emitted when the minimize button is pressed.
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#[setters(strip_option)]
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on_minimize: Option<Message>,
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/// A message emitted when the header is right clicked.
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#[setters(strip_option)]
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on_right_click: Option<Message>,
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/// Focused state of the window
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focused: bool,
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/// Elements packed at the start of the headerbar.
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#[setters(skip)]
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start: Vec<Element<'a, Message>>,
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/// Elements packed in the center of the headerbar.
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#[setters(skip)]
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center: Vec<Element<'a, Message>>,
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/// Elements packed at the end of the headerbar.
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#[setters(skip)]
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end: Vec<Element<'a, Message>>,
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}
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impl<'a, Message: Clone + 'static> HeaderBar<'a, Message> {
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/// Defines the title of the window
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#[must_use]
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pub fn title(mut self, title: impl Into<Cow<'a, str>> + 'a) -> Self {
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self.title = title.into();
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self
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}
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/// Pushes an element to the start region.
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#[must_use]
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pub fn start(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
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self.start.push(widget.into());
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self
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}
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/// Pushes an element to the center region.
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#[must_use]
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pub fn center(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
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self.center.push(widget.into());
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self
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}
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/// Pushes an element to the end region.
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#[must_use]
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pub fn end(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
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self.end.push(widget.into());
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self
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}
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/// Build the widget
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#[must_use]
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pub fn build(self) -> HeaderBarWidget<'a, Message> {
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HeaderBarWidget {
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header_bar_inner: self.into_element(),
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}
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}
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}
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pub struct HeaderBarWidget<'a, Message> {
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header_bar_inner: Element<'a, Message>,
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}
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impl<'a, Message: Clone + 'static> Widget<Message, crate::Theme, crate::Renderer>
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for HeaderBarWidget<'a, Message>
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{
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fn diff(&mut self, tree: &mut tree::Tree) {
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tree.diff_children(&mut [&mut self.header_bar_inner]);
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}
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fn children(&self) -> Vec<tree::Tree> {
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vec![tree::Tree::new(&self.header_bar_inner)]
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}
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fn size(&self) -> iced_core::Size<Length> {
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self.header_bar_inner.as_widget().size()
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}
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fn layout(
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&self,
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tree: &mut tree::Tree,
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renderer: &crate::Renderer,
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limits: &iced_core::layout::Limits,
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) -> iced_core::layout::Node {
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let child_tree = &mut tree.children[0];
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let child = self
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.header_bar_inner
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.as_widget()
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.layout(child_tree, renderer, limits);
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iced_core::layout::Node::with_children(child.size(), vec![child])
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}
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fn draw(
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&self,
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tree: &tree::Tree,
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renderer: &mut crate::Renderer,
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theme: &crate::Theme,
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style: &iced_core::renderer::Style,
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layout: iced_core::Layout<'_>,
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cursor: iced_core::mouse::Cursor,
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viewport: &iced_core::Rectangle,
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) {
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let layout_children = layout.children().next().unwrap();
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let state_children = &tree.children[0];
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self.header_bar_inner.as_widget().draw(
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state_children,
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renderer,
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theme,
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style,
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layout_children,
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cursor,
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viewport,
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);
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}
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fn on_event(
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&mut self,
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state: &mut tree::Tree,
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event: iced_core::Event,
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layout: iced_core::Layout<'_>,
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cursor: iced_core::mouse::Cursor,
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renderer: &crate::Renderer,
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clipboard: &mut dyn iced_core::Clipboard,
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shell: &mut iced_core::Shell<'_, Message>,
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viewport: &iced_core::Rectangle,
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) -> iced_core::event::Status {
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let child_state = &mut state.children[0];
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let child_layout = layout.children().next().unwrap();
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self.header_bar_inner.as_widget_mut().on_event(
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child_state,
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event,
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child_layout,
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cursor,
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renderer,
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clipboard,
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shell,
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viewport,
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)
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}
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fn mouse_interaction(
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&self,
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state: &tree::Tree,
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layout: iced_core::Layout<'_>,
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cursor: iced_core::mouse::Cursor,
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viewport: &iced_core::Rectangle,
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renderer: &crate::Renderer,
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) -> iced_core::mouse::Interaction {
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let child_tree = &state.children[0];
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let child_layout = layout.children().next().unwrap();
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self.header_bar_inner.as_widget().mouse_interaction(
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child_tree,
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child_layout,
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cursor,
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viewport,
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renderer,
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)
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}
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fn operate(
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&self,
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state: &mut tree::Tree,
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layout: iced_core::Layout<'_>,
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renderer: &crate::Renderer,
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operation: &mut dyn iced_core::widget::Operation<
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iced_core::widget::OperationOutputWrapper<Message>,
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>,
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) {
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let child_tree = &mut state.children[0];
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let child_layout = layout.children().next().unwrap();
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self.header_bar_inner
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.as_widget()
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.operate(child_tree, child_layout, renderer, operation);
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}
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fn overlay<'b>(
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&'b mut self,
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state: &'b mut tree::Tree,
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layout: iced_core::Layout<'_>,
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renderer: &crate::Renderer,
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) -> Option<iced_core::overlay::Element<'b, Message, crate::Theme, crate::Renderer>> {
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let child_tree = &mut state.children[0];
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let child_layout = layout.children().next().unwrap();
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self.header_bar_inner
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.as_widget_mut()
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.overlay(child_tree, child_layout, renderer)
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}
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}
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impl<'a, Message: Clone + 'static> HeaderBar<'a, Message> {
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/// Converts the headerbar builder into an Iced element.
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pub fn into_element(mut self) -> Element<'a, Message> {
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// Take ownership of the regions to be packed.
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let start = std::mem::take(&mut self.start);
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let center = std::mem::take(&mut self.center);
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let mut end = std::mem::take(&mut self.end);
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// Also packs the window controls at the very end.
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end.push(widget::horizontal_space(Length::Fixed(12.0)).into());
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end.push(self.window_controls());
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// Creates the headerbar widget.
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let mut widget = widget::row::with_capacity(4)
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// If elements exist in the start region, append them here.
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.push(
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widget::row::with_children(start)
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.align_items(iced::Alignment::Center)
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.apply(widget::container)
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.align_x(iced::alignment::Horizontal::Left)
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.width(Length::Shrink),
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)
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// If elements exist in the center region, use them here.
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// This will otherwise use the title as a widget if a title was defined.
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.push(if !center.is_empty() {
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widget::row::with_children(center)
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.align_items(iced::Alignment::Center)
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.apply(widget::container)
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.align_x(iced::alignment::Horizontal::Center)
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.width(Length::Fill)
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.into()
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} else if self.title.is_empty() {
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widget::horizontal_space(Length::Fill).into()
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} else {
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self.title_widget()
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})
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.push(
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widget::row::with_children(end)
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.align_items(iced::Alignment::Center)
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.apply(widget::container)
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.align_x(iced::alignment::Horizontal::Right)
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.width(Length::Shrink),
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)
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.align_items(iced::Alignment::Center)
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.height(Length::Fixed(50.0))
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.padding(8)
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.spacing(8)
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.apply(widget::container)
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.style(crate::theme::Container::HeaderBar)
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.center_y()
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.apply(widget::mouse_area);
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// Assigns a message to emit when the headerbar is dragged.
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if let Some(message) = self.on_drag.clone() {
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widget = widget.on_drag(message);
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}
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// Assigns a message to emit when the headerbar is double-clicked.
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if let Some(message) = self.on_maximize.clone() {
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widget = widget.on_release(message);
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}
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if let Some(message) = self.on_right_click.clone() {
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widget = widget.on_right_press(message);
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}
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widget.into()
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}
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fn title_widget(&mut self) -> Element<'a, Message> {
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let mut title = Cow::default();
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std::mem::swap(&mut title, &mut self.title);
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widget::text(title)
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.size(16)
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.font(crate::font::FONT_SEMIBOLD)
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.apply(widget::container)
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.center_x()
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.center_y()
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.width(Length::Fill)
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.height(Length::Fill)
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.into()
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}
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/// Creates the widget for window controls.
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fn window_controls(&mut self) -> Element<'a, Message> {
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let icon = |icon_bytes, size, on_press| {
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widget::icon::from_svg_bytes(icon_bytes)
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.symbolic(true)
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.apply(widget::button::icon)
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.style(crate::theme::Button::HeaderBar)
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.selected(self.focused)
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.icon_size(size)
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.on_press(on_press)
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};
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widget::row::with_capacity(3)
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.push_maybe(self.on_minimize.take().map(|m| {
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icon(
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&include_bytes!("../../res/icons/window-minimize-symbolic.svg")[..],
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16,
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m,
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)
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}))
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.push_maybe(self.on_maximize.take().map(|m| {
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icon(
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&include_bytes!("../../res/icons/window-maximize-symbolic.svg")[..],
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16,
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m,
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)
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}))
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.push_maybe(self.on_close.take().map(|m| {
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icon(
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&include_bytes!("../../res/icons/window-close-symbolic.svg")[..],
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16,
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m,
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)
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}))
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.spacing(8)
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.apply(widget::container)
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.height(Length::Fill)
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.center_y()
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.into()
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}
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}
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impl<'a, Message: Clone + 'static> From<HeaderBar<'a, Message>> for Element<'a, Message> {
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fn from(headerbar: HeaderBar<'a, Message>) -> Self {
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Element::new(headerbar.build())
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}
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}
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impl<'a, Message: Clone + 'static> From<HeaderBarWidget<'a, Message>> for Element<'a, Message> {
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fn from(headerbar: HeaderBarWidget<'a, Message>) -> Self {
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Element::new(headerbar)
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}
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}
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