WinGetTitle Topic is solved

[rommmcek]

Possible WinGetTitle bug.

[andymbody]

See this post for possible explanation...

viewtopic.php?f=83&t=113308&p=542257#p542257

[theyakutoo]

Same error with WinGetPos...

Checking for previous posts about this issue... and found my own post quoted! Thanks for putting this in bug reports

[lexikos]

What makes you think it is a bug? If there is no foreground window (the system function GetForegroundWindow returns 0), or the foreground window cannot be "found" due to DetectHiddenWindows, there will be no target window. Hence the error. WinExist("A") should be 0 in these cases.

@andymbody It does not matter what the title is. There is no such thing as a window with no title, but sometimes the title is not visible, or has a length of 0.

[andymbody]

How do we avoid the exception/error that is thrown, other than try/catch?

[lexikos]

You don't avoid an exception that is thrown. You catch it, or you avoid the condition that causes the exception to be thrown, so that it isn't thrown.

As I said, WinExist("A") should return 0 in those cases.

[theyakutoo]

It seems like a bug because V1 did not behave this way.

I'll use a lib to handle the V2 window title oddities.

Code: Select all

#Requires AutoHotkey >2
#Singleinstance force

wX1:=0,wY1:=0,wXd:=0,wYd:=0
while 1 {
	wGetPos(&wX1, &wY1, &wXd, &wYd, "A")
	tooltip(wGetTitle("A") '`n' wX1 "," wY1 "`n" wXd "," wYd "`n" a_tickcount)
	sleep 100
}

esc::exitapp

;=============================================================================
; wGetTitle
;=============================================================================
wGetTitle(title) {		; ahk2 has issue with getting title for taskbar when switching apps.
	try	return WinGetTitle(title)
	catch
		return ""
}

;=============================================================================
; wGetPos
;=============================================================================
wGetPos(&pX1, &pY1, &pXd, &pYd, title) {
	try	return WinGetPos(&pX1, &pY1, &pXd, &pYd, title)
	catch {
		pX1:=0,pY1:=0,pXd:=0,pYd:=0
		return 0
	}
}

[lexikos]

What do you think is the point of changing the version number? Of course it behaves differently.

If there is no matching window, OutputVar is made blank.

A TargetError is thrown if the window could not be found.

This is part of overall changes to error handling. v1 has a tendency to ignore errors, return blank values or set ErrorLevel; it is inconsistent. v2 throws errors more consistently.