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Desktop: Trackpad pinch to zoom (#3271) 

* prototype pinch gesture

* pinch to zoom

* fix
This commit is contained in:
Timon 2025-10-15 00:27:27 +02:00 committed by GitHub
parent 34d0b76333
commit 717defb2bb
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2 changed files with 17 additions and 1 deletions
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2
desktop/src/cef/consts.rs
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@ -8,5 +8,7 @@ pub(crate) const SCROLL_LINE_WIDTH: usize = 40;
pub(crate) const SCROLL_SPEED_X: f32 = 3.0;
pub(crate) const SCROLL_SPEED_Y: f32 = 3.0;
pub(crate) const PINCH_ZOOM_SPEED: f64 = 300.0;
pub(crate) const MULTICLICK_TIMEOUT: Duration = Duration::from_millis(500);
pub(crate) const MULTICLICK_ALLOWED_TRAVEL: usize = 4;

16
desktop/src/cef/input.rs
View File

@ -7,7 +7,7 @@ use winit::event::{ButtonSource, ElementState, MouseButton, MouseScrollDelta, Wi
mod keymap;
use keymap::{ToNativeKeycode, ToVKBits};
use super::consts::{MULTICLICK_ALLOWED_TRAVEL, MULTICLICK_TIMEOUT, SCROLL_LINE_HEIGHT, SCROLL_LINE_WIDTH, SCROLL_SPEED_X, SCROLL_SPEED_Y};
use super::consts::{MULTICLICK_ALLOWED_TRAVEL, MULTICLICK_TIMEOUT, PINCH_ZOOM_SPEED, SCROLL_LINE_HEIGHT, SCROLL_LINE_WIDTH, SCROLL_SPEED_X, SCROLL_SPEED_Y};
pub(crate) fn handle_window_event(browser: &Browser, input_state: &mut InputState, event: &WindowEvent) {
match event {
@ -129,6 +129,20 @@ pub(crate) fn handle_window_event(browser: &Browser, input_state: &mut InputStat
}
}
}
WindowEvent::PinchGesture { delta, .. } => {
if !delta.is_normal() {
return;
}
let Some(host) = browser.host() else { return };
let mut mouse_event: MouseEvent = input_state.into();
mouse_event.modifiers |= cef_event_flags_t::EVENTFLAG_CONTROL_DOWN as u32;
mouse_event.modifiers |= cef_event_flags_t::EVENTFLAG_PRECISION_SCROLLING_DELTA as u32;
let delta = (delta * PINCH_ZOOM_SPEED).round() as i32;
host.send_mouse_wheel_event(Some(&mouse_event), 0, delta);
}
_ => {}
}
}