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Remove internal scrolling from list_view

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This commit is contained in:
Alexandre Bury 2018-07-24 19:06:07 -07:00
parent 46181fabcc
commit 49e1d1d15e
3 changed files with 20 additions and 98 deletions
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3
examples/list_view.rs
View File

@ -74,7 +74,8 @@ fn main() {
EditView::new(),
);
}
}),
})
.scrollable(),
),
);

4
src/printer.rs
View File

@ -168,7 +168,7 @@ impl<'a, 'b> Printer<'a, 'b> {
// Here again, we can abort if we're trying to print too far right or
// too low.
if !start.fits_in(self.output_size + self.content_offset) {
if !(start < (self.output_size + self.content_offset)) {
return;
}
@ -212,7 +212,7 @@ impl<'a, 'b> Printer<'a, 'b> {
let start = start.into();
// Nothing to be done if the start if too far to the bottom/right
if !start.fits_in(self.output_size + self.content_offset) {
if !(start < (self.output_size + self.content_offset)) {
return;
}

103
src/views/list_view.rs
View File

@ -1,12 +1,10 @@
use direction;
use event::{
AnyCb, Callback, Event, EventResult, Key, MouseButton, MouseEvent,
};
use event::{AnyCb, Callback, Event, EventResult, Key};
use rect::Rect;
use std::rc::Rc;
use unicode_width::UnicodeWidthStr;
use vec::Vec2;
use view::{ScrollBase, Selector, View};
use view::{Selector, View};
use Cursive;
use Printer;
use With;
@ -37,10 +35,9 @@ impl ListChild {
}
}
/// Displays a scrollable list of elements.
/// Displays a list of elements.
pub struct ListView {
children: Vec<ListChild>,
scrollbase: ScrollBase,
focus: usize,
// This callback is called when the selection is changed.
on_select: Option<Rc<Fn(&mut Cursive, &String)>>,
@ -54,7 +51,6 @@ impl ListView {
pub fn new() -> Self {
ListView {
children: Vec::new(),
scrollbase: ScrollBase::new(),
focus: 0,
on_select: None,
last_size: Vec2::zero(),
@ -192,7 +188,6 @@ impl ListView {
return EventResult::Ignored;
};
self.focus = i;
self.scrollbase.scroll_to(self.focus);
EventResult::Consumed(self.on_select.clone().map(|cb| {
let i = self.focus();
@ -226,14 +221,10 @@ impl ListView {
Some(pos) => pos,
};
if position.y > self.scrollbase.view_height {
return;
}
// eprintln!("Rel pos: {:?}", position);
// Now that we have a relative position, checks for buttons?
let focus = position.y + self.scrollbase.start_line;
let focus = position.y;
if focus >= self.children.len() {
return;
}
@ -269,16 +260,17 @@ impl View for ListView {
let offset = self.labels_width() + 1;
debug!("Offset: {}", offset);
self.scrollbase
.draw(printer, |printer, i| match self.children[i] {
for (i, child) in self.children.iter().enumerate() {
match child {
ListChild::Row(ref label, ref view) => {
printer.print((0, 0), label);
printer.print((0, i), label);
view.draw(
&printer.offset((offset, 0)).focused(i == self.focus),
&printer.offset((offset, i)).focused(i == self.focus),
);
}
ListChild::Delimiter => (),
});
}
}
}
fn required_size(&mut self, req: Vec2) -> Vec2 {
@ -299,17 +291,11 @@ impl View for ListView {
.max()
.unwrap_or(0);
if self.children.len() > req.y {
// Include a scroll bar
Vec2::new(label_width + 1 + view_size + 2, req.y)
} else {
Vec2::new(label_width + 1 + view_size, self.children.len())
}
}
fn layout(&mut self, size: Vec2) {
self.last_size = size;
self.scrollbase.set_heights(size.y, self.children.len());
// We'll show 2 columns: the labels, and the views.
let label_width = self
@ -321,11 +307,8 @@ impl View for ListView {
.unwrap_or(0);
let spacing = 1;
let scrollbar_width = if self.children.len() > size.y { 2 } else { 0 };
let available = size
.x
.saturating_sub(label_width + spacing + scrollbar_width);
let available = size.x.saturating_sub(label_width + spacing);
debug!("Available: {}", available);
@ -339,46 +322,6 @@ impl View for ListView {
return EventResult::Ignored;
}
// First: some events can directly affect the ListView
match event {
Event::Mouse {
event: MouseEvent::Press(MouseButton::Left),
position,
offset,
}
if position
.checked_sub(offset)
.map(|position| {
self.scrollbase.start_drag(position, self.last_size.x)
})
.unwrap_or(false) =>
{
return EventResult::Consumed(None);
}
Event::Mouse {
event: MouseEvent::Hold(MouseButton::Left),
position,
offset,
}
if self.scrollbase.is_dragging() =>
{
let position = position.saturating_sub(offset);
self.scrollbase.drag(position);
return EventResult::Consumed(None);
}
Event::Mouse {
event: MouseEvent::Release(MouseButton::Left),
..
}
if self.scrollbase.is_dragging() =>
{
self.scrollbase.release_grab();
return EventResult::Consumed(None);
}
_ => (),
}
// Then: some events can move the focus around.
self.check_focus_grab(&event);
// Send the event to the focused child.
@ -386,15 +329,12 @@ impl View for ListView {
if let ListChild::Row(_, ref mut view) = self.children[self.focus] {
// If self.focus < self.scrollbase.start_line, it means the focus is not
// in view. Something's fishy, so don't send the event.
if let Some(y) = self.focus.checked_sub(self.scrollbase.start_line)
{
let offset = (labels_width + 1, y);
let offset = (labels_width + 1, self.focus);
let result = view.on_event(event.relativized(offset));
if result.is_consumed() {
return result;
}
}
}
// If the child ignored this event, change the focus.
match event {
@ -420,24 +360,6 @@ impl View for ListView {
Event::Shift(Key::Tab) => {
self.move_focus(1, direction::Direction::back())
}
Event::Mouse {
event: MouseEvent::WheelDown,
..
}
if self.scrollbase.can_scroll_down() =>
{
self.scrollbase.scroll_down(5);
EventResult::Consumed(None)
}
Event::Mouse {
event: MouseEvent::WheelUp,
..
}
if self.scrollbase.can_scroll_up() =>
{
self.scrollbase.scroll_up(5);
EventResult::Consumed(None)
}
_ => EventResult::Ignored,
}
}
@ -455,7 +377,6 @@ impl View for ListView {
return false;
};
self.focus = i;
self.scrollbase.scroll_to(self.focus);
true
}