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Implement grabbing of the mouse pointer for X11

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Contains new methods in the Window API that closely mirror the Xlib API. The
methods are left unimplemented for other platforms for now.
This commit is contained in:
Eduard Bopp 2015-01-25 12:06:50 +01:00
parent 63d2cd263e
commit 18f9bc44c9
5 changed files with 70 additions and 0 deletions
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15
src/x11/ffi.rs
View file

@ -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);
}
/*

27
src/x11/window/mod.rs
View file

@ -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
}