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Add mouse support to Slider

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This commit is contained in:
Alexandre Bury 2017-10-13 10:52:26 -07:00
parent 5f3e4b1842
commit ef0909d41e
1 changed files with 43 additions and 2 deletions
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45
src/views/slider_view.rs
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@ -1,7 +1,7 @@
use {Cursive, Printer};
use With;
use direction::{Direction, Orientation};
use event::{Callback, Event, EventResult, Key};
use event::{Callback, Event, EventResult, Key, MouseButton, MouseEvent};
use std::rc::Rc;
use theme::ColorStyle;
use vec::Vec2;
@ -14,6 +14,7 @@ pub struct SliderView {
on_enter: Option<Rc<Fn(&mut Cursive, usize)>>,
value: usize,
max_value: usize,
dragging: bool,
}
impl SliderView {
@ -28,6 +29,7 @@ impl SliderView {
max_value: max_value,
on_change: None,
on_enter: None,
dragging: false,
}
}
@ -103,6 +105,10 @@ impl SliderView {
EventResult::Ignored
}
}
fn req_size(&self) -> Vec2 {
self.orientation.make_vec(self.max_value, 1)
}
}
impl View for SliderView {
@ -127,7 +133,7 @@ impl View for SliderView {
}
fn required_size(&mut self, _: Vec2) -> Vec2 {
self.orientation.make_vec(self.max_value, 1)
self.req_size()
}
fn on_event(&mut self, event: Event) -> EventResult {
@ -159,6 +165,41 @@ impl View for SliderView {
cb(s, value);
})
}
Event::Mouse {
event: MouseEvent::Hold(MouseButton::Left),
position,
offset,
} if self.dragging =>
{
let position = position.saturating_sub(offset);
let position = self.orientation.get(&position);
let position = ::std::cmp::min(
position,
self.max_value.saturating_sub(1),
);
self.value = position;
self.get_change_result()
}
Event::Mouse {
event: MouseEvent::Press(MouseButton::Left),
position,
offset,
} if position.fits_in_rect(offset, self.req_size()) =>
{
position.checked_sub(offset).map(|position| {
self.dragging = true;
self.value = self.orientation.get(&position);
});
self.get_change_result()
}
Event::Mouse {
event: MouseEvent::Release(MouseButton::Left),
position: _,
offset: _,
} => {
self.dragging = false;
EventResult::Ignored
}
_ => EventResult::Ignored,
}
}