X11: Add support for window closing and quitting.

CHANGELOG.md

@@ -54,7 +54,7 @@ While some features like the clipboard, menus or file dialogs are not yet availa
 ### Fixed
 
 - GTK: Use the system locale. ([#798] by [@finnerale])
-- GTK: Actually close windows ([#797] by [@finnerale])
+- GTK: Actually close windows. ([#797] by [@finnerale])
 - Windows: Respect the minimum window size. ([#727] by [@teddemunnik])
 - Windows: Respect resizability. ([#712] by [@teddemunnik])
 - `Event::HotChanged(false)` will be emitted when the cursor leaves the window. ([#821] by [@teddemunnik])
@@ -68,7 +68,9 @@ While some features like the clipboard, menus or file dialogs are not yet availa
 - Windows: Termiate app when all windows have closed. ([#763] by [@xStrom])
 - macOS: `Application::quit` now quits the run loop instead of killing the process. ([#763] by [@xStrom])
 - macOS/GTK/web: `MouseButton::X1` and `MouseButton::X2` clicks are now recognized. ([#843] by [@xStrom])
-- GTK: Support disabled menu items ([#897] by [@jneem])
+- GTK: Support disabled menu items. ([#897] by [@jneem])
+- X11: Support individual window closing. ([#900] by [@xStrom])
+- X11: Support `Application::quit`. ([#900] by [@xStrom])
 
 ### Visual
 
@@ -144,6 +146,7 @@ While some features like the clipboard, menus or file dialogs are not yet availa
 [#894]: https://github.com/xi-editor/druid/pull/894
 [#897]: https://github.com/xi-editor/druid/pull/897
 [#898]: https://github.com/xi-editor/druid/pull/898
+[#900]: https://github.com/xi-editor/druid/pull/900
 
 ## [0.5.0] - 2020-04-01
 

druid-shell/src/platform/x11/error.rs

@@ -31,7 +31,7 @@ impl fmt::Display for Error {
         match self {
             Error::Generic(msg) => write!(f, "Error: {}", msg),
             Error::ConnectionError(err) => write!(f, "Connection error: {}", err),
-            Error::BorrowError(msg) => write!(f, "Borrow error: {}", msg),
+            Error::BorrowError(msg) => write!(f, "Failed to borrow: {}", msg),
         }
     }
 }

druid-shell/src/platform/x11/util.rs

@@ -14,10 +14,10 @@
 
 //! Miscellaneous utility functions for working with X11.
 
-use xcb::Window;
+use xcb::{Connection, Screen, Visualtype, Window};
 
 // See: https://github.com/rtbo/rust-xcb/blob/master/examples/randr_screen_modes.rs
-pub fn refresh_rate(conn: &xcb::Connection, window_id: Window) -> Option<f64> {
+pub fn refresh_rate(conn: &Connection, window_id: Window) -> Option<f64> {
     let cookie = xcb::randr::get_screen_resources(conn, window_id);
     let reply = cookie.get_reply().unwrap();
     let mut modes = reply.modes();
@@ -48,3 +48,15 @@ pub fn refresh_rate(conn: &xcb::Connection, window_id: Window) -> Option<f64> {
 
     Some(refresh_rate)
 }
+
+// Apparently you have to get the visualtype this way :|
+pub fn get_visual_from_screen(screen: &Screen<'_>) -> Option<Visualtype> {
+    for depth in screen.allowed_depths() {
+        for visual in depth.visuals() {
+            if visual.visual_id() == screen.root_visual() {
+                return Some(visual);
+            }
+        }
+    }
+    None
+}