func sendMouseEvent(hwnd syscall.Handle, uMsg uint32, wParam, lParam uintptr) (lResult uintptr) {
e := mouse.Event{
X: float32(_GET_X_LPARAM(lParam)),
Y: float32(_GET_Y_LPARAM(lParam)),
Modifiers: keyModifiers(),
}
switch uMsg {
case _WM_MOUSEMOVE:
e.Direction = mouse.DirNone
case _WM_LBUTTONDOWN, _WM_MBUTTONDOWN, _WM_RBUTTONDOWN:
e.Direction = mouse.DirPress
case _WM_LBUTTONUP, _WM_MBUTTONUP, _WM_RBUTTONUP:
e.Direction = mouse.DirRelease
case _WM_MOUSEWHEEL:
// TODO: On a trackpad, a scroll can be a drawn-out affair with a
// distinct beginning and end. Should the intermediate events be
// DirNone?
e.Direction = mouse.DirStep
default:
panic("sendMouseEvent() called on non-mouse message")
}
switch uMsg {
case _WM_MOUSEMOVE:
// No-op.
case _WM_LBUTTONDOWN, _WM_LBUTTONUP:
e.Button = mouse.ButtonLeft
case _WM_MBUTTONDOWN, _WM_MBUTTONUP:
e.Button = mouse.ButtonMiddle
case _WM_RBUTTONDOWN, _WM_RBUTTONUP:
e.Button = mouse.ButtonRight
case _WM_MOUSEWHEEL:
// TODO: handle horizontal scrolling
delta := _GET_WHEEL_DELTA_WPARAM(wParam) / _WHEEL_DELTA
switch {
case delta > 0:
e.Button = mouse.ButtonWheelUp
case delta < 0:
e.Button = mouse.ButtonWheelDown
delta = -delta
default:
return
}
for delta > 0 {
MouseEvent(hwnd, e)
delta--
}
return
}
MouseEvent(hwnd, e)
return 0
}
func sendMouseEvent(hwnd HWND, uMsg uint32, wParam, lParam uintptr) (lResult uintptr) {
e := mouse.Event{
X: float32(_GET_X_LPARAM(lParam)),
Y: float32(_GET_Y_LPARAM(lParam)),
Modifiers: keyModifiers(),
}
switch uMsg {
case _WM_MOUSEMOVE, _WM_MOUSEWHEEL:
e.Direction = mouse.DirNone
case _WM_LBUTTONDOWN, _WM_MBUTTONDOWN, _WM_RBUTTONDOWN:
e.Direction = mouse.DirPress
case _WM_LBUTTONUP, _WM_MBUTTONUP, _WM_RBUTTONUP:
e.Direction = mouse.DirRelease
default:
panic("sendMouseEvent() called on non-mouse message")
}
switch uMsg {
case _WM_MOUSEMOVE:
switch {
case wParam&_MK_LBUTTON == _MK_LBUTTON:
e.Button = mouse.ButtonLeft
case wParam&_MK_MBUTTON == _MK_MBUTTON:
e.Button = mouse.ButtonMiddle
case wParam&_MK_RBUTTON == _MK_RBUTTON:
e.Button = mouse.ButtonRight
default:
// TODO: send move events when no buttons are held down?
return 0
}
case _WM_LBUTTONDOWN, _WM_LBUTTONUP:
e.Button = mouse.ButtonLeft
case _WM_MBUTTONDOWN, _WM_MBUTTONUP:
e.Button = mouse.ButtonMiddle
case _WM_RBUTTONDOWN, _WM_RBUTTONUP:
e.Button = mouse.ButtonRight
case _WM_MOUSEWHEEL:
delta := _GET_WHEEL_DELTA_WPARAM(wParam) / _WHEEL_DELTA
switch {
case delta > 0:
e.Button = mouse.ButtonWheelUp
case delta < 0:
e.Button = mouse.ButtonWheelDown
delta = -delta
default:
return
}
for delta > 0 {
MouseEvent(hwnd, e)
delta--
}
return
}
MouseEvent(hwnd, e)
return 0
}
