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-rw-r--r--src/android/mod.rs4
-rw-r--r--src/win32/mod.rs8
-rw-r--r--src/window.rs16
-rw-r--r--src/x11/ffi.rs15
-rw-r--r--src/x11/window/mod.rs27
5 files changed, 70 insertions, 0 deletions
diff --git a/src/android/mod.rs b/src/android/mod.rs
index 71dae54..653ae39 100644
--- a/src/android/mod.rs
+++ b/src/android/mod.rs
@@ -358,6 +358,10 @@ impl Window {
pub fn set_cursor(&self, _: MouseCursor) {
}
+ pub fn grab_cursor(&self) -> Result<(), String> { Ok(()) }
+
+ pub fn ungrab_cursor(&self) {}
+
pub fn hidpi_factor(&self) -> f32 {
1.0
}
diff --git a/src/win32/mod.rs b/src/win32/mod.rs
index 380342e..9daf0c3 100644
--- a/src/win32/mod.rs
+++ b/src/win32/mod.rs
@@ -255,6 +255,14 @@ impl Window {
unimplemented!()
}
+ pub fn grab_cursor(&self) -> Result<(), String> {
+ unimplemented!()
+ }
+
+ pub fn ungrab_cursor(&self) {
+ unimplemented!()
+ }
+
pub fn hidpi_factor(&self) -> f32 {
1.0
}
diff --git a/src/window.rs b/src/window.rs
index d670e04..22fd400 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -414,6 +414,22 @@ impl Window {
pub fn set_cursor_position(&self, x: i32, y: i32) -> Result<(), ()> {
self.window.set_cursor_position(x, y)
}
+
+ /// Grabs the mouse cursor. The cursor's motion will be confined to this
+ /// window and the window has exclusive access to further events regarding
+ /// the cursor.
+ /// Fails if it is not possible to grab the window for some reason, e.g.
+ /// when another window has already done so.
+ /// Has no effect on Android.
+ pub fn grab_cursor(&self) -> Result<(), String> {
+ self.window.grab_cursor()
+ }
+
+ /// Release a previously grabbed mouse cursor.
+ pub fn ungrab_cursor(&self) {
+ self.window.ungrab_cursor();
+ }
+
}
impl gl_common::GlFunctionsSource for Window {
diff --git a/src/x11/ffi.rs b/src/x11/ffi.rs
index 1d91cab..e33ea24 100644
--- a/src/x11/ffi.rs
+++ b/src/x11/ffi.rs
@@ -42,6 +42,17 @@ pub const Button5: libc::c_uint = 5;
pub const InputOutput: libc::c_uint = 1;
pub const InputOnly: libc::c_uint = 2;
+pub const CurrentTime: Time = 0;
+
+pub const GrabModeSync: libc::c_int = 0;
+pub const GrabModeAsync: libc::c_int = 1;
+
+pub const GrabSuccess: libc::c_int = 0;
+pub const AlreadyGrabbed: libc::c_int = 1;
+pub const GrabInvalidTime: libc::c_int = 2;
+pub const GrabNotViewable: libc::c_int = 3;
+pub const GrabFrozen: libc::c_int = 4;
+
pub const CWBackPixmap: libc::c_ulong = (1<<0);
pub const CWBackPixel: libc::c_ulong = (1<<1);
pub const CWBorderPixmap: libc::c_ulong = (1<<2);
@@ -1470,6 +1481,10 @@ extern "C" {
pub fn XcursorLibraryLoadCursor(dpy: *mut Display, name: *const libc::c_char) -> Cursor;
pub fn XDefineCursor(dby: *mut Display, w: Window, cursor: Cursor);
+ pub fn XGrabPointer(dpy: *mut Display, w: Window, owner_events: bool, event_mask: libc::c_long,
+ pointer_mode: libc::c_int, keyboard_mode: libc::c_int, confine_to: Window, cursor: Cursor,
+ time: Time) -> libc::c_int;
+ pub fn XUngrabPointer(dpy: *mut Display, time: Time);
}
/*
diff --git a/src/x11/window/mod.rs b/src/x11/window/mod.rs
index 385a913..d576150 100644
--- a/src/x11/window/mod.rs
+++ b/src/x11/window/mod.rs
@@ -782,6 +782,33 @@ impl Window {
}
}
+ pub fn grab_cursor(&self) -> Result<(), String> {
+ unsafe {
+ match ffi::XGrabPointer(
+ self.x.display, self.x.window, false,
+ ffi::ButtonPressMask | ffi::ButtonReleaseMask | ffi::EnterWindowMask |
+ ffi::LeaveWindowMask | ffi::PointerMotionMask | ffi::PointerMotionHintMask |
+ ffi::Button1MotionMask | ffi::Button2MotionMask | ffi::Button3MotionMask |
+ ffi::Button4MotionMask | ffi::Button5MotionMask | ffi::ButtonMotionMask |
+ ffi::KeymapStateMask,
+ ffi::GrabModeAsync, ffi::GrabModeAsync,
+ self.x.window, 0, ffi::CurrentTime
+ ) {
+ ffi::GrabSuccess => Ok(()),
+ ffi::AlreadyGrabbed | ffi::GrabInvalidTime |
+ ffi::GrabNotViewable | ffi::GrabFrozen
+ => Err("cursor could not be grabbed".to_string()),
+ _ => unreachable!(),
+ }
+ }
+ }
+
+ pub fn ungrab_cursor(&self) {
+ unsafe {
+ ffi::XUngrabPointer(self.x.display, ffi::CurrentTime);
+ }
+ }
+
pub fn hidpi_factor(&self) -> f32 {
1.0
}