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Respect wheel scrolling speed settings on Windows

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The default values are 3 lines. With this change, scrolling speed now seems
similar to other programs like cmd.exe. Before this change it feels too slow.
This commit is contained in:
Jun Wu 2020-01-20 13:55:18 -08:00 committed by Wez Furlong
parent ff6ff649af
commit 511fc55b10
3 changed files with 25 additions and 2 deletions
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1
Cargo.lock generated
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@ -3468,6 +3468,7 @@ dependencies = [
"thiserror",
"wayland-client",
"winapi 0.3.8",
"winreg",
"x11",
"xcb",
"xcb-util",

2
window/Cargo.toml
View File

@ -36,6 +36,7 @@ opengl = ["cgl", "glium", "gl_generator", "libloading"]
wayland = ["smithay-client-toolkit", "memmap", "wayland-client"]
[target."cfg(windows)".dependencies]
lazy_static = "1.4"
winapi = { version = "0.3", features = [
"dwmapi",
"handleapi",
@ -45,6 +46,7 @@ winapi = { version = "0.3", features = [
"winerror",
"winuser",
]}
winreg = "0.6"
clipboard-win = "2.2"
[target.'cfg(all(unix, not(target_os = "macos")))'.dependencies]

24
window/src/os/windows/window.rs
View File

@ -9,11 +9,12 @@ use crate::{
WindowOps, WindowOpsMut,
};
use anyhow::{bail, Context};
use lazy_static::lazy_static;
use promise::Future;
use std::any::Any;
use std::cell::RefCell;
use std::convert::TryInto;
use std::io::Error as IoError;
use std::io::{self, Error as IoError};
use std::os::windows::ffi::OsStringExt;
use std::ptr::{null, null_mut};
use std::rc::Rc;
@ -24,6 +25,7 @@ use winapi::um::imm::*;
use winapi::um::libloaderapi::GetModuleHandleW;
use winapi::um::wingdi::*;
use winapi::um::winuser::*;
use winreg::{enums::HKEY_CURRENT_USER, RegKey};
const GCS_RESULTSTR: DWORD = 0x800;
extern "system" {
@ -779,12 +781,30 @@ unsafe fn mouse_move(hwnd: HWND, _msg: UINT, wparam: WPARAM, lparam: LPARAM) ->
}
}
lazy_static! {
static ref WHEEL_SCROLL_LINES: i16 = read_scroll_speed("WheelScrollLines").unwrap_or(3);
static ref WHEEL_SCROLL_CHARS: i16 = read_scroll_speed("WheelScrollChars").unwrap_or(3);
}
fn read_scroll_speed(name: &str) -> io::Result<i16> {
let hkcu = RegKey::predef(HKEY_CURRENT_USER);
let desktop = hkcu.open_subkey("Control Panel\\Desktop")?;
desktop
.get_value::<String, _>(name)
.and_then(|v| v.parse().map_err(|_| io::ErrorKind::InvalidData.into()))
}
unsafe fn mouse_wheel(hwnd: HWND, msg: UINT, wparam: WPARAM, lparam: LPARAM) -> Option<LRESULT> {
if let Some(inner) = rc_from_hwnd(hwnd) {
let (modifiers, mouse_buttons) = mods_and_buttons(wparam);
let coords = mouse_coords(lparam);
let delta = GET_WHEEL_DELTA_WPARAM(wparam);
let mut position = delta / WHEEL_DELTA;
let scaled_delta = if msg == WM_MOUSEWHEEL {
delta * (*WHEEL_SCROLL_LINES)
} else {
delta * (*WHEEL_SCROLL_CHARS)
};
let mut position = scaled_delta / WHEEL_DELTA;
let remainder = delta % WHEEL_DELTA;
let event = MouseEvent {
kind: if msg == WM_MOUSEHWHEEL {