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windows: Implement window_appearance()
and should_auto_hide_scrollbars()
(#12527)
Release Notes: - N/A
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da281d6d8f
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@ -416,6 +416,7 @@ features = [
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"Foundation_Numerics",
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"System",
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"System_Threading",
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"UI_ViewManagement",
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"Wdk_System_SystemServices",
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"Win32_Globalization",
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"Win32_Graphics_Direct2D",
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@ -27,6 +27,10 @@ use windows::{
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System::{Com::*, LibraryLoader::*, Ole::*, SystemInformation::*, Threading::*, Time::*},
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UI::{Input::KeyboardAndMouse::*, Shell::*, WindowsAndMessaging::*},
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},
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UI::{
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Color,
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ViewManagement::{UIColorType, UISettings},
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},
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};
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use crate::*;
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@ -300,9 +304,8 @@ impl Platform for WindowsPlatform {
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Ok(Box::new(window))
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}
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// todo(windows)
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fn window_appearance(&self) -> WindowAppearance {
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WindowAppearance::Dark
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system_appearance().log_err().unwrap_or_default()
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}
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fn open_url(&self, url: &str) {
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@ -498,9 +501,8 @@ impl Platform for WindowsPlatform {
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}
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}
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// todo(windows)
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fn should_auto_hide_scrollbars(&self) -> bool {
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false
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should_auto_hide_scrollbars().log_err().unwrap_or(false)
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}
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fn write_to_clipboard(&self, item: ClipboardItem) {
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@ -682,3 +684,28 @@ fn load_icon() -> Result<HICON> {
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};
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Ok(HICON(handle.0))
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}
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// https://learn.microsoft.com/en-us/windows/apps/desktop/modernize/apply-windows-themes
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#[inline]
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fn system_appearance() -> Result<WindowAppearance> {
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let ui_settings = UISettings::new()?;
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let foreground_color = ui_settings.GetColorValue(UIColorType::Foreground)?;
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// If the foreground is light, then is_color_light will evaluate to true,
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// meaning Dark mode is enabled.
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if is_color_light(&foreground_color) {
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Ok(WindowAppearance::Dark)
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} else {
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Ok(WindowAppearance::Light)
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}
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}
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#[inline(always)]
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fn is_color_light(color: &Color) -> bool {
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((5 * color.G as u32) + (2 * color.R as u32) + color.B as u32) > (8 * 128)
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}
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#[inline]
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fn should_auto_hide_scrollbars() -> Result<bool> {
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let ui_settings = UISettings::new()?;
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Ok(ui_settings.AutoHideScrollBars()?)
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}
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