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|
//! Display a widget over another.
use crate::widget::Tree;
use crate::{Element, Widget};
use iced_native::event::{self, Event};
use iced_native::layout;
use iced_native::mouse;
use iced_native::overlay;
use iced_native::renderer;
use iced_native::text;
use iced_native::widget::container;
use iced_native::widget::tooltip;
use iced_native::widget::{self, Text};
use iced_native::{Clipboard, Layout, Length, Point, Rectangle, Shell};
pub use iced_style::container::{Appearance, StyleSheet};
pub use tooltip::Position;
/// An element to display a widget over another.
#[allow(missing_debug_implementations)]
pub struct Tooltip<'a, Message, Renderer: text::Renderer>
where
Renderer: text::Renderer,
Renderer::Theme: container::StyleSheet + widget::text::StyleSheet,
{
content: Element<'a, Message, Renderer>,
tooltip: Text<Renderer>,
position: Position,
gap: u16,
padding: u16,
style: <Renderer::Theme as container::StyleSheet>::Style,
}
impl<'a, Message, Renderer> Tooltip<'a, Message, Renderer>
where
Renderer: text::Renderer,
Renderer::Theme: container::StyleSheet + widget::text::StyleSheet,
{
/// The default padding of a [`Tooltip`] drawn by this renderer.
const DEFAULT_PADDING: u16 = 5;
/// Creates a new [`Tooltip`].
///
/// [`Tooltip`]: struct.Tooltip.html
pub fn new(
content: impl Into<Element<'a, Message, Renderer>>,
tooltip: impl ToString,
position: Position,
) -> Self {
Tooltip {
content: content.into(),
tooltip: Text::new(tooltip.to_string()),
position,
gap: 0,
padding: Self::DEFAULT_PADDING,
style: Default::default(),
}
}
/// Sets the size of the text of the [`Tooltip`].
pub fn size(mut self, size: u16) -> Self {
self.tooltip = self.tooltip.size(size);
self
}
/// Sets the font of the [`Tooltip`].
///
/// [`Font`]: Renderer::Font
pub fn font(mut self, font: impl Into<Renderer::Font>) -> Self {
self.tooltip = self.tooltip.font(font);
self
}
/// Sets the gap between the content and its [`Tooltip`].
pub fn gap(mut self, gap: u16) -> Self {
self.gap = gap;
self
}
/// Sets the padding of the [`Tooltip`].
pub fn padding(mut self, padding: u16) -> Self {
self.padding = padding;
self
}
/// Sets the style of the [`Tooltip`].
pub fn style(
mut self,
style: impl Into<<Renderer::Theme as container::StyleSheet>::Style>,
) -> Self {
self.style = style.into();
self
}
}
impl<'a, Message, Renderer> Widget<Message, Renderer>
for Tooltip<'a, Message, Renderer>
where
Renderer: text::Renderer,
Renderer::Theme: container::StyleSheet + widget::text::StyleSheet,
{
fn children(&self) -> Vec<Tree> {
vec![Tree::new(&self.content)]
}
fn diff(&self, tree: &mut Tree) {
tree.diff_children(std::slice::from_ref(&self.content))
}
fn width(&self) -> Length {
self.content.as_widget().width()
}
fn height(&self) -> Length {
self.content.as_widget().height()
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
self.content.as_widget().layout(renderer, limits)
}
fn on_event(
&mut self,
tree: &mut Tree,
event: Event,
layout: Layout<'_>,
cursor_position: Point,
renderer: &Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Message>,
) -> event::Status {
self.content.as_widget_mut().on_event(
&mut tree.children[0],
event,
layout,
cursor_position,
renderer,
clipboard,
shell,
)
}
fn mouse_interaction(
&self,
tree: &Tree,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
renderer: &Renderer,
) -> mouse::Interaction {
self.content.as_widget().mouse_interaction(
&tree.children[0],
layout.children().next().unwrap(),
cursor_position,
viewport,
renderer,
)
}
fn draw(
&self,
tree: &Tree,
renderer: &mut Renderer,
theme: &Renderer::Theme,
inherited_style: &renderer::Style,
layout: Layout<'_>,
cursor_position: Point,
viewport: &Rectangle,
) {
self.content.as_widget().draw(
&tree.children[0],
renderer,
theme,
inherited_style,
layout,
cursor_position,
viewport,
);
let tooltip = &self.tooltip;
tooltip::draw(
renderer,
theme,
inherited_style,
layout,
cursor_position,
viewport,
self.position,
self.gap,
self.padding,
self.style,
|renderer, limits| {
Widget::<(), Renderer>::layout(tooltip, renderer, limits)
},
|renderer, defaults, layout, cursor_position, viewport| {
Widget::<(), Renderer>::draw(
tooltip,
&Tree::empty(),
renderer,
theme,
defaults,
layout,
cursor_position,
viewport,
);
},
);
}
fn overlay<'b>(
&'b self,
tree: &'b mut Tree,
layout: Layout<'_>,
renderer: &Renderer,
) -> Option<overlay::Element<'b, Message, Renderer>> {
self.content.as_widget().overlay(
&mut tree.children[0],
layout,
renderer,
)
}
}
impl<'a, Message, Renderer> From<Tooltip<'a, Message, Renderer>>
for Element<'a, Message, Renderer>
where
Message: 'a,
Renderer: 'a + text::Renderer,
Renderer::Theme: container::StyleSheet + widget::text::StyleSheet,
{
fn from(
tooltip: Tooltip<'a, Message, Renderer>,
) -> Element<'a, Message, Renderer> {
Element::new(tooltip)
}
}
|
