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Ability to force a theme on Windows (#1666)

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Viktor Zoutman 2020-11-30 19:04:26 +01:00 • committed by GitHub
parent 5700359a61
commit 6ddee9a8ac
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9 changed files with 63 additions and 37 deletions
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21
src/platform_impl/windows/dark_mode.rs
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@ -14,6 +14,8 @@ use winapi::{
um::{libloaderapi, uxtheme, winuser},
};
use crate::window::Theme;
lazy_static! {
static ref WIN10_BUILD_VERSION: Option<DWORD> = {
// FIXME: RtlGetVersion is a documented windows API,
@ -70,11 +72,14 @@ lazy_static! {
static ref LIGHT_THEME_NAME: Vec<u16> = widestring("");
}
/// Attempt to set dark mode on a window, if necessary.
/// Returns true if dark mode was set, false if not.
pub fn try_dark_mode(hwnd: HWND) -> bool {
/// Attempt to set a theme on a window, if necessary.
/// Returns the theme that was picked
pub fn try_theme(hwnd: HWND, preferred_theme: Option<Theme>) -> Theme {
if *DARK_MODE_SUPPORTED {
let is_dark_mode = should_use_dark_mode();
let is_dark_mode = match preferred_theme {
Some(theme) => theme == Theme::Dark,
None => should_use_dark_mode(),
};
let theme_name = if is_dark_mode {
DARK_THEME_NAME.as_ptr()
@ -84,10 +89,12 @@ pub fn try_dark_mode(hwnd: HWND) -> bool {
let status = unsafe { uxtheme::SetWindowTheme(hwnd, theme_name as _, std::ptr::null()) };
status == S_OK && set_dark_mode_for_window(hwnd, is_dark_mode)
} else {
false
if status == S_OK && set_dark_mode_for_window(hwnd, is_dark_mode) {
return Theme::Dark;
}
}
Theme::Light
}
fn set_dark_mode_for_window(hwnd: HWND, is_dark_mode: bool) -> bool {