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|
//! Let your users split regions of your application and organize layout dynamically.
//!
//! [](https://gfycat.com/mixedflatjellyfish)
//!
//! # Example
//! The [`pane_grid` example] showcases how to use a [`PaneGrid`] with resizing,
//! drag and drop, and hotkey support.
//!
//! [`pane_grid` example]: https://github.com/hecrj/iced/tree/0.1/examples/pane_grid
//! [`PaneGrid`]: type.PaneGrid.html
use crate::{Backend, Primitive, Renderer};
use iced_native::mouse;
use iced_native::pane_grid;
use iced_native::{Element, Layout, Point, Rectangle, Vector};
pub use iced_native::pane_grid::{
Axis, Configuration, Content, Direction, DragEvent, Focus, KeyPressEvent,
Pane, ResizeEvent, Split, State, TitleBar,
};
/// A collection of panes distributed using either vertical or horizontal splits
/// to completely fill the space available.
///
/// [](https://gfycat.com/mixedflatjellyfish)
///
/// This is an alias of an `iced_native` pane grid with an `iced_wgpu::Renderer`.
pub type PaneGrid<'a, Message, Backend> =
iced_native::PaneGrid<'a, Message, Renderer<Backend>>;
impl<B> pane_grid::Renderer for Renderer<B>
where
B: Backend,
{
fn draw<Message>(
&mut self,
defaults: &Self::Defaults,
content: &[(Pane, Content<'_, Message, Self>)],
dragging: Option<Pane>,
resizing: Option<Axis>,
layout: Layout<'_>,
cursor_position: Point,
) -> Self::Output {
let pane_cursor_position = if dragging.is_some() {
// TODO: Remove once cursor availability is encoded in the type
// system
Point::new(-1.0, -1.0)
} else {
cursor_position
};
let mut mouse_interaction = mouse::Interaction::default();
let mut dragged_pane = None;
let mut panes: Vec<_> = content
.iter()
.zip(layout.children())
.enumerate()
.map(|(i, ((id, pane), layout))| {
let (primitive, new_mouse_interaction) =
pane.draw(self, defaults, layout, pane_cursor_position);
if new_mouse_interaction > mouse_interaction {
mouse_interaction = new_mouse_interaction;
}
if Some(*id) == dragging {
dragged_pane = Some((i, layout));
}
primitive
})
.collect();
let primitives = if let Some((index, layout)) = dragged_pane {
let pane = panes.remove(index);
let bounds = layout.bounds();
// TODO: Fix once proper layering is implemented.
// This is a pretty hacky way to achieve layering.
let clip = Primitive::Clip {
bounds: Rectangle {
x: cursor_position.x - bounds.width / 2.0,
y: cursor_position.y - bounds.height / 2.0,
width: bounds.width + 0.5,
height: bounds.height + 0.5,
},
offset: Vector::new(0, 0),
content: Box::new(Primitive::Translate {
translation: Vector::new(
cursor_position.x - bounds.x - bounds.width / 2.0,
cursor_position.y - bounds.y - bounds.height / 2.0,
),
content: Box::new(pane),
}),
};
panes.push(clip);
panes
} else {
panes
};
(
Primitive::Group { primitives },
if dragging.is_some() {
mouse::Interaction::Grabbing
} else if let Some(axis) = resizing {
match axis {
Axis::Horizontal => mouse::Interaction::ResizingVertically,
Axis::Vertical => mouse::Interaction::ResizingHorizontally,
}
} else {
mouse_interaction
},
)
}
fn draw_pane<Message>(
&mut self,
defaults: &Self::Defaults,
title_bar: Option<(&TitleBar<'_, Message, Self>, Layout<'_>)>,
body: (&Element<'_, Message, Self>, Layout<'_>),
cursor_position: Point,
) -> Self::Output {
let (body, body_layout) = body;
let (body_primitive, body_interaction) =
body.draw(self, defaults, body_layout, cursor_position);
if let Some((title_bar, title_bar_layout)) = title_bar {
let (title_bar_primitive, title_bar_interaction) = title_bar.draw(
self,
defaults,
title_bar_layout,
cursor_position,
);
(
Primitive::Group {
primitives: vec![title_bar_primitive, body_primitive],
},
if title_bar_interaction > body_interaction {
title_bar_interaction
} else {
body_interaction
},
)
} else {
(body_primitive, body_interaction)
}
}
fn draw_title_bar<Message>(
&mut self,
defaults: &Self::Defaults,
style: &<Self as iced_native::container::Renderer>::Style,
title: (&Element<'_, Message, Self>, Layout<'_>),
controls: Option<(&Element<'_, Message, Self>, Layout<'_>)>,
cursor_position: Point,
) -> Self::Output {
let (title, title_layout) = title;
let (title_primitive, _) =
title.draw(self, defaults, title_layout, cursor_position);
if let Some((controls, controls_layout)) = controls {
let (controls_primitive, controls_interaction) =
controls.draw(self, defaults, controls_layout, cursor_position);
(
Primitive::Group {
primitives: vec![title_primitive, controls_primitive],
},
controls_interaction,
)
} else {
(title_primitive, mouse::Interaction::default())
}
}
}
|
