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Merge pull request #397 from hecrj/intuitive-pane-grid-resize

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Intuitive `PaneGrid` resize
This commit is contained in:
Héctor Ramón 2020-06-09 09:35:01 +02:00 committed by GitHub
commit c0a5dc980e
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3 changed files with 153 additions and 102 deletions
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2
examples/pane_grid/src/main.rs
View File

@ -103,7 +103,7 @@ impl Sandbox for Example {
.height(Length::Fill)
.spacing(10)
.on_drag(Message::Dragged)
.on_resize(Message::Resized)
.on_resize(10, Message::Resized)
.on_key_press(handle_hotkey);
Container::new(pane_grid)

231
native/src/widget/pane_grid.rs
View File

@ -26,7 +26,7 @@ pub use state::{Focus, State};
use crate::{
keyboard, layout, mouse, Clipboard, Element, Event, Hasher, Layout, Length,
Point, Size, Widget,
Point, Rectangle, Size, Widget,
};
/// A collection of panes distributed using either vertical or horizontal splits
@ -76,7 +76,7 @@ use crate::{
/// }.into()
/// })
/// .on_drag(Message::PaneDragged)
/// .on_resize(Message::PaneResized);
/// .on_resize(10, Message::PaneResized);
/// ```
///
/// [`PaneGrid`]: struct.PaneGrid.html
@ -91,7 +91,7 @@ pub struct PaneGrid<'a, Message, Renderer> {
spacing: u16,
modifier_keys: keyboard::ModifiersState,
on_drag: Option<Box<dyn Fn(DragEvent) -> Message + 'a>>,
on_resize: Option<Box<dyn Fn(ResizeEvent) -> Message + 'a>>,
on_resize: Option<(u16, Box<dyn Fn(ResizeEvent) -> Message + 'a>)>,
on_key_press: Option<Box<dyn Fn(KeyPressEvent) -> Option<Message> + 'a>>,
}
@ -177,8 +177,8 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
/// Sets the modifier keys of the [`PaneGrid`].
///
/// The modifier keys will need to be pressed to trigger dragging, resizing,
/// and key events.
/// The modifier keys will need to be pressed to trigger dragging, and key
/// events.
///
/// The default modifier key is `Ctrl`.
///
@ -208,14 +208,19 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
/// Enables the resize interactions of the [`PaneGrid`], which will
/// use the provided function to produce messages.
///
/// Panes can be resized using `Modifier keys + Right click`.
/// The `leeway` describes the amount of space around a split that can be
/// used to grab it.
///
/// The grabbable area of a split will have a length of `spacing + leeway`,
/// properly centered. In other words, a length of
/// `(spacing + leeway) / 2.0` on either side of the split line.
///
/// [`PaneGrid`]: struct.PaneGrid.html
pub fn on_resize<F>(mut self, f: F) -> Self
pub fn on_resize<F>(mut self, leeway: u16, f: F) -> Self
where
F: 'a + Fn(ResizeEvent) -> Message,
{
self.on_resize = Some(Box::new(f));
self.on_resize = Some((leeway, Box::new(f)));
self
}
@ -244,13 +249,42 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
self
}
fn click_pane(
&mut self,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
) {
let mut clicked_region =
self.elements.iter().zip(layout.children()).filter(
|(_, layout)| layout.bounds().contains(cursor_position),
);
if let Some(((pane, _), _)) = clicked_region.next() {
match &self.on_drag {
Some(on_drag)
if self.pressed_modifiers.matches(self.modifier_keys) =>
{
self.state.pick_pane(pane);
messages.push(on_drag(DragEvent::Picked { pane: *pane }));
}
_ => {
self.state.focus(pane);
}
}
} else {
self.state.unfocus();
}
}
fn trigger_resize(
&mut self,
layout: Layout<'_>,
cursor_position: Point,
messages: &mut Vec<Message>,
) {
if let Some(on_resize) = &self.on_resize {
if let Some((_, on_resize)) = &self.on_resize {
if let Some((split, _)) = self.state.picked_split() {
let bounds = layout.bounds();
@ -409,32 +443,45 @@ where
match event {
Event::Mouse(mouse_event) => match mouse_event {
mouse::Event::ButtonPressed(mouse::Button::Left) => {
let mut clicked_region =
self.elements.iter().zip(layout.children()).filter(
|(_, layout)| {
layout.bounds().contains(cursor_position)
},
let bounds = layout.bounds();
if bounds.contains(cursor_position) {
match self.on_resize {
Some((leeway, _)) => {
let relative_cursor = Point::new(
cursor_position.x - bounds.x,
cursor_position.y - bounds.y,
);
if let Some(((pane, _), _)) = clicked_region.next() {
match &self.on_drag {
Some(on_drag)
if self
.pressed_modifiers
.matches(self.modifier_keys) =>
{
self.state.pick_pane(pane);
let splits = self.state.splits(
f32::from(self.spacing),
Size::new(bounds.width, bounds.height),
);
messages.push(on_drag(DragEvent::Picked {
pane: *pane,
}));
}
_ => {
self.state.focus(pane);
}
}
let clicked_split = hovered_split(
splits.iter(),
f32::from(self.spacing + leeway),
relative_cursor,
);
if let Some((split, axis)) = clicked_split {
self.state.pick_split(&split, axis);
} else {
self.state.unfocus();
self.click_pane(
layout,
cursor_position,
messages,
);
}
}
None => {
self.click_pane(
layout,
cursor_position,
messages,
);
}
}
}
}
mouse::Event::ButtonReleased(mouse::Button::Left) => {
@ -462,78 +509,10 @@ where
messages.push(on_drag(event));
}
}
}
mouse::Event::ButtonPressed(mouse::Button::Right)
if self.on_resize.is_some()
&& self.state.picked_pane().is_none()
&& self
.pressed_modifiers
.matches(self.modifier_keys) =>
{
let bounds = layout.bounds();
if bounds.contains(cursor_position) {
let relative_cursor = Point::new(
cursor_position.x - bounds.x,
cursor_position.y - bounds.y,
);
let splits = self.state.splits(
f32::from(self.spacing),
Size::new(bounds.width, bounds.height),
);
let mut sorted_splits: Vec<_> = splits
.iter()
.filter(|(_, (axis, rectangle, _))| match axis {
Axis::Horizontal => {
relative_cursor.x > rectangle.x
&& relative_cursor.x
< rectangle.x + rectangle.width
}
Axis::Vertical => {
relative_cursor.y > rectangle.y
&& relative_cursor.y
< rectangle.y + rectangle.height
}
})
.collect();
sorted_splits.sort_by_key(
|(_, (axis, rectangle, ratio))| {
let distance = match axis {
Axis::Horizontal => (relative_cursor.y
- (rectangle.y
+ rectangle.height * ratio))
.abs(),
Axis::Vertical => (relative_cursor.x
- (rectangle.x
+ rectangle.width * ratio))
.abs(),
};
distance.round() as u32
},
);
if let Some((split, (axis, _, _))) =
sorted_splits.first()
{
self.state.pick_split(split, *axis);
self.trigger_resize(
layout,
cursor_position,
messages,
);
}
}
}
mouse::Event::ButtonReleased(mouse::Button::Right)
if self.state.picked_split().is_some() =>
{
} else if self.state.picked_split().is_some() {
self.state.drop_split();
}
}
mouse::Event::CursorMoved { .. } => {
self.trigger_resize(layout, cursor_position, messages);
}
@ -597,11 +576,37 @@ where
layout: Layout<'_>,
cursor_position: Point,
) -> Renderer::Output {
let picked_split = self
.state
.picked_split()
.or_else(|| match self.on_resize {
Some((leeway, _)) => {
let bounds = layout.bounds();
let relative_cursor = Point::new(
cursor_position.x - bounds.x,
cursor_position.y - bounds.y,
);
let splits = self
.state
.splits(f32::from(self.spacing), bounds.size());
hovered_split(
splits.iter(),
f32::from(self.spacing + leeway),
relative_cursor,
)
}
None => None,
})
.map(|(_, axis)| axis);
renderer.draw(
defaults,
&self.elements,
self.state.picked_pane(),
self.state.picked_split().map(|(_, axis)| axis),
picked_split,
layout,
cursor_position,
)
@ -665,3 +670,25 @@ where
Element::new(pane_grid)
}
}
/*
* Helpers
*/
fn hovered_split<'a>(
splits: impl Iterator<Item = (&'a Split, &'a (Axis, Rectangle, f32))>,
spacing: f32,
cursor_position: Point,
) -> Option<(Split, Axis)> {
splits
.filter_map(|(split, (axis, region, ratio))| {
let bounds =
axis.split_line_bounds(*region, *ratio, f32::from(spacing));
if bounds.contains(cursor_position) {
Some((*split, *axis))
} else {
None
}
})
.next()
}

24
native/src/widget/pane_grid/axis.rs
View File

@ -53,6 +53,30 @@ impl Axis {
}
}
}
pub(super) fn split_line_bounds(
&self,
rectangle: Rectangle,
ratio: f32,
spacing: f32,
) -> Rectangle {
match self {
Axis::Horizontal => Rectangle {
x: rectangle.x,
y: (rectangle.y + rectangle.height * ratio - spacing / 2.0)
.round(),
width: rectangle.width,
height: spacing,
},
Axis::Vertical => Rectangle {
x: (rectangle.x + rectangle.width * ratio - spacing / 2.0)
.round(),
y: rectangle.y,
width: spacing,
height: rectangle.height,
},
}
}
}
#[cfg(test)]