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Use a faster scroll speed under X11

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Platforms may report scroll deltas either in
chunks/lines/rows or pixels, depending on the
platform API and device capabilities.

If the platform reports a line/chunk-based delta
then the application needs to convert the delta
into a suitable number of pixels.

This commit just hardcodes it to 57 as
a starting point which matches the value that
Firefox calculates as the max char height
for the root frame on my system.

Fixes #5660
This commit is contained in:
Robert Knight 2015-06-14 00:39:25 +01:00
parent 72ead882c0
commit 658df60477
3 changed files with 18 additions and 8 deletions
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2
components/servo/Cargo.lock generated
View file

@ -476,7 +476,7 @@ dependencies = [
[[package]]
name = "glutin"
version = "0.0.26"
source = "git+https://github.com/servo/glutin?branch=servo#3d39d1bb45a6f76be846ed92f946424e24109141"
source = "git+https://github.com/servo/glutin?branch=servo#abb5ba69eb6188d24567b47e7b5a289adc595f29"
dependencies = [
"android_glue 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
"cocoa 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",

2
ports/cef/Cargo.lock generated
View file

@ -468,7 +468,7 @@ dependencies = [
[[package]]
name = "glutin"
version = "0.0.26"
source = "git+https://github.com/servo/glutin?branch=servo#3d39d1bb45a6f76be846ed92f946424e24109141"
source = "git+https://github.com/servo/glutin?branch=servo#abb5ba69eb6188d24567b47e7b5a289adc595f29"
dependencies = [
"android_glue 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
"cocoa 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",

22
ports/glutin/window.rs
View file

@ -28,7 +28,7 @@ use compositing::windowing::{MouseWindowEvent, WindowNavigateMsg};
#[cfg(feature = "window")]
use euclid::point::Point2D;
#[cfg(feature = "window")]
use glutin::{Api, ElementState, Event, GlRequest, MouseButton, VirtualKeyCode};
use glutin::{Api, ElementState, Event, GlRequest, MouseButton, VirtualKeyCode, MouseScrollDelta};
#[cfg(feature = "window")]
use msg::constellation_msg::{KeyState, CONTROL, SHIFT, ALT};
#[cfg(feature = "window")]
@ -187,15 +187,25 @@ impl Window {
Event::MouseWheel(delta) => {
if self.ctrl_pressed() {
// Ctrl-Scrollwheel simulates a "pinch zoom" gesture.
if delta < 0 {
let dy = match delta {
MouseScrollDelta::LineDelta(_, dy) => dy,
MouseScrollDelta::PixelDelta(_, dy) => dy
};
if dy < 0.0 {
self.event_queue.borrow_mut().push(WindowEvent::PinchZoom(1.0/1.1));
} else if delta > 0 {
} else if dy > 0.0 {
self.event_queue.borrow_mut().push(WindowEvent::PinchZoom(1.1));
}
} else {
let dx = 0.0;
let dy = delta as f32;
self.scroll_window(dx, dy);
match delta {
MouseScrollDelta::LineDelta(dx, dy) => {
// this should use the actual line height
// of the frame under the mouse
let line_height = 57.0;
self.scroll_window(dx, dy * line_height);
}
MouseScrollDelta::PixelDelta(dx, dy) => self.scroll_window(dx, dy)
}
}
},
Event::Refresh => {