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Added mouse capture/release to windows backend (#81)

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* Added mouse capture/release to windows backend

* Mouse capture now automatic only

Removed manual ability to trigger mouse capture and release.

* Added refcount for mouse button event

Added refcount to prevent the mouse capture from releasing before all mouse buttons have been released.

* Removed unnecessary function from window
This commit is contained in:
George Atkinson 2020-12-19 23:41:40 +00:00 committed by GitHub
parent c64b2257f5
commit 9fdb75155d
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 0 deletions
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16
src/win/window.rs
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@ -13,6 +13,7 @@ use winapi::um::winuser::{
WM_SYSKEYDOWN, WM_KEYUP, WM_SYSKEYUP, WM_INPUTLANGCHANGE,
GET_XBUTTON_WPARAM, WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONDOWN, WM_MBUTTONUP,
WM_RBUTTONDOWN, WM_RBUTTONUP, WM_XBUTTONDOWN, WM_XBUTTONUP, XBUTTON1, XBUTTON2,
SetCapture, GetCapture, ReleaseCapture, IsWindow
};
use std::cell::RefCell;
@ -68,6 +69,8 @@ unsafe extern "system" fn wnd_proc(
let mut window = Window { hwnd };
let mut window = crate::Window(&mut window);
let mut mouse_button_counter = window_state.borrow().mouse_button_counter;
match msg {
WM_MOUSEMOVE => {
let x = (lparam & 0xFFFF) as i32;
@ -104,9 +107,18 @@ unsafe extern "system" fn wnd_proc(
if let Some(button) = button {
let event = match msg {
WM_LBUTTONDOWN | WM_MBUTTONDOWN | WM_RBUTTONDOWN | WM_XBUTTONDOWN => {
// Capture the mouse cursor on button down
mouse_button_counter = mouse_button_counter.saturating_add(1);
SetCapture(hwnd);
MouseEvent::ButtonPressed(button)
}
WM_LBUTTONUP | WM_MBUTTONUP | WM_RBUTTONUP | WM_XBUTTONUP => {
// Release the mouse cursor capture when all buttons are released
mouse_button_counter = mouse_button_counter.saturating_sub(1);
if mouse_button_counter == 0 {
ReleaseCapture();
}
MouseEvent::ButtonReleased(button)
}
_ => {
@ -156,6 +168,8 @@ unsafe extern "system" fn wnd_proc(
}
_ => {}
}
window_state.borrow_mut().mouse_button_counter = mouse_button_counter;
}
return DefWindowProcW(hwnd, msg, wparam, lparam);
@ -193,6 +207,7 @@ struct WindowState {
window_class: ATOM,
window_info: WindowInfo,
keyboard_state: KeyboardState,
mouse_button_counter: usize,
handler: Box<dyn WindowHandler>,
}
@ -301,6 +316,7 @@ impl Window {
window_class,
window_info,
keyboard_state: KeyboardState::new(),
mouse_button_counter: 0,
handler,
}));