def _run(self):
if vision._isDebug():
log.debug("Starting NVDAHighlighter thread")
window = self.window = self.customWindowClass(self)
self.timer = winUser.WinTimer(window.handle, 0, self.refreshInterval,
None)
msg = MSG()
while winUser.getMessage(byref(msg), None, 0, 0):
winUser.user32.TranslateMessage(byref(msg))
winUser.user32.DispatchMessageW(byref(msg))
if vision._isDebug():
log.debug("Quit message received on NVDAHighlighter thread")
if self.timer:
self.timer.terminate()
self.timer = None
if self.window:
self.window.destroy()
self.window = None
def _run(self):
try:
if vision._isDebug():
log.debug("Starting NVDAHighlighter thread")
window = self._window = self.customWindowClass(self)
timer = winUser.WinTimer(window.handle, 0, self._refreshInterval, None)
self._highlighterRunningEvent.set() # notify main thread that initialisation was successful
msg = MSG()
# Python 3.8 note, Change this to use an Assignment expression to catch a return value of -1.
# See the remarks section of
# https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getmessage
while winUser.getMessage(byref(msg), None, 0, 0) > 0:
winUser.user32.TranslateMessage(byref(msg))
winUser.user32.DispatchMessageW(byref(msg))
if vision._isDebug():
log.debug("Quit message received on NVDAHighlighter thread")
timer.terminate()
window.destroy()
except Exception:
log.exception("Exception in NVDA Highlighter thread")
def __init__(self, highlighter):
if vision._isDebug():
log.debug("initializing NVDAHighlighter window")
super().__init__(windowName=self.windowName,
windowStyle=self.windowStyle,
extendedWindowStyle=self.extendedWindowStyle)
self.location = None
self.highlighterRef = weakref.ref(highlighter)
winUser.SetLayeredWindowAttributes(
self.handle, self.transparentColor, self.transparency,
winUser.LWA_ALPHA | winUser.LWA_COLORKEY)
self.updateLocationForDisplays()
if not winUser.user32.UpdateWindow(self.handle):
raise WinError()
def updateLocationForDisplays(self):
if vision._isDebug():
log.debug("Updating NVDAHighlighter window location for displays")
displays = [
wx.Display(i).GetGeometry() for i in range(wx.Display.GetCount())
]
screenWidth, screenHeight, minPos = getTotalWidthAndHeightAndMinimumPosition(
displays)
# Hack: Windows has a "feature" that will stop desktop shortcut hotkeys from working
# when a window is full screen.
# Removing one line of pixels from the bottom of the screen will fix this.
left = minPos.x
top = minPos.y
width = screenWidth
height = screenHeight - 1
self.location = RectLTWH(left, top, width, height)
winUser.user32.ShowWindow(self.handle, winUser.SW_HIDE)
if not winUser.user32.SetWindowPos(self.handle, winUser.HWND_TOPMOST,
left, top, width, height,
winUser.SWP_NOACTIVATE):
raise WinError()
winUser.user32.ShowWindow(self.handle, winUser.SW_SHOWNA)