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Why no ControlGetStyle() function?

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Hi,

I've got about two weeks experience with AutoIt now, and I have to say it is an amazing macro system. Good job, everyone!

Everything has been going fine with my current project, but I've come across one curious thing; I would have expected to find a ControlGetStyle() function to get the style info that shows up for controls in the AutoIt Window Info app, but there doesn't appear to be such a function in the documentation. Am I missing something obvious?

I've found a workaround for the moment, but if I could directly read the $ES_READONLY state of a control I'd have cleaner code...

Thanks,

Ed

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Hi, wellcome to forum!

There is ControlCommand() function, that you can use to check some states - but for checking if control is read only it's not usefull :)


 

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Hi, wellcome to forum!

There is ControlCommand() function, that you can use to check some states - but for checking if control is read only it's not usefull :)

Ah well, at least I still have my workaround.

And perhaps more importantly, I haven't gone batty and missed something obvious.

Thanks for the reply,

Ed

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You can get styles from controls. The problem appears to be that the constants required are peculiar to the class of control, so you get a different function for each class. For example, this is the _GUICtrlListViewGetExtendedListViewStyle() function from GuiListView.au3:

;===============================================================================
;
; Description:          _GUICtrlListViewGetExtendedListViewStyle
; Parameter(s):     $h_listview - controlID
; Requirement:          None
; Return Value(s):  Returns a DWORD that represents the styles currently in use for a given list-view control.
;                           This value can be a combination of Extended List-View Styles
; User CallTip:     _GUICtrlListViewGetExtendedListViewStyle($h_listview) Retrieves the extended styles that are currently in use for a given list-view control (required: <GuiListView.au3>)
; Author(s):            Gary Frost (custompcs at charter dot net)
; Note(s):              :
;
;===============================================================================
Func _GUICtrlListViewGetExtendedListViewStyle($h_listview)
    If Not _IsClassName ($h_listview, "SysListView32") Then Return SetError($LV_ERR, $LV_ERR, $LV_ERR)
    If IsHWnd($h_listview) Then
        Return _SendMessage($h_listview, $LVM_GETEXTENDEDLISTVIEWSTYLE)
    Else
        Return GUICtrlSendMsg($h_listview, $LVM_GETEXTENDEDLISTVIEWSTYLE, 0, 0)
    EndIf
EndFunc   ;==>_GUICtrlListViewGetExtendedListViewStyle

:)


Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law

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You can get styles from controls. The problem appears to be that the constants required are peculiar to the class of control, so you get a different function for each class. For example, this is the _GUICtrlListViewGetExtendedListViewStyle() function from GuiListView.au3:

[...]

I see that there are functions to get extended styles from ListView and tab controls, but $ES_READONLY is a non-extended style property of an edit field. I don't see any _GUI...GetStyle() functions for any controls at all. Besides, would it not make sense to have an API function that gets the style bit field for any valid control and then leaves it up to the user to determine what the various bits mean? Maybe it should be called something like... ControlGetStyle()? The AutoIt Window Info app makes me think it should be possible, but I could be wrong.

Anyway, thanks for the pointer PsaltyDS.

Ed

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#7 ·  Posted (edited)

That will set the value of that one Style attribute. But the original question was about reading ("Get") the Style. There is this: LVM_GETEXTENDEDLISTVIEWSTYLE Message for listview, but doesn't appear to be any equivalent for Edit controls, and as was pointed out, that appears to read only extended Style, with no command message fro regular Styles.

Seems kind of arbitrary that some do and some don't.

:)

Edited by PsaltyDS

Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law

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That will set the value of that one Style attribute. But the original question was about reading ("Get") the Style. There is this: LVM_GETEXTENDEDLISTVIEWSTYLE Message for listview, but doesn't appear to be any equivalent for Edit controls.

Seems kind of arbitrary that some do and some don't.

:)

Yeah, on both accounts. I have limited knowledge and just thought that it may help. I tried a few things, but I don't really understand how many things work. I just want to lend any information that might help.

It doesn't make much sense on how come there isn't a command for GET. Maybe I should look through the source code for the SETStyle... do you know if that's a good idea to start there?


A decision is a powerful thing

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Yeah, on both accounts. I have limited knowledge and just thought that it may help. I tried a few things, but I don't really understand how many things work. I just want to lend any information that might help.

It doesn't make much sense on how come there isn't a command for GET. Maybe I should look through the source code for the SETStyle... do you know if that's a good idea to start there?

Don't be too hard on yourself... that page you referred to had this nice bit: "To determine whether an edit control has the ES_READONLY style, use the GetWindowLong function with the GWL_STYLE flag."

So it seems it is possible. I'm not that much of a Windows programmer myself, so I think I'll stick with my workaround (I'm trying to figure out which control is which on a pre-existing GUI, and since 'get style' is hard, I'm using position information instead). But this definitely looks like the right direction otherwise.

Thanks,

Ed

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Thanks for the encouragement. I'm very slowly catching on to the WinAPI stuff.

Have you tried out ANYGui ?

http://www.autoitscript.com/forum/index.ph...7&hl=AnyGui

No, but it looks like _TargetStyle() might do the trick! Thanks! I guess I should look at some other stuff in the Example Scripts forum, I've only used Auto3Lib so far.

OK, that's not quite true... I tried to use LibCsv but had performance issues so I wrote my own CSV parser. I really should post it - it only reads CSV files but it is mighty quick.

Thanks again,

Ed

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Oh, wooooooOOOOOOW! :)

How did I miss that? When you call quaizywabbit's _TargetStyle() with no parameters, it returns a 2-element array with both Style, and ExStyle. That is achieved basically by this:

Local $ostyle = DllCall("user32.dll", "long", "GetWindowLong", "hwnd", $TargethWnd, "int", -16);get existing Style
    Local $oexstyle = DllCall("user32.dll", "long", "GetWindowLong", "hwnd", $TargethWnd, "int", -20);get existing ExStyle

I'm going to try some testing demos to make sure I didn't just misunderstand in a whole new way here...

:P


Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law

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Demo done. This brings up a GUI with an edit control that has $ES_READONLY set for a style. The buttons display either the Style or ExStyle of the Edit control, and bit out the number so you can look up the values in the help file.

#include <guiconstants.au3>
#include <A3LConstants.au3>
#include <A3LWinAPI.au3>

Opt("GuiOnEventMode", 1)

; Create GUI
$hGUI = GUICreate("Edit Styles Test", 600, 420)
GUISetOnEvent($GUI_EVENT_CLOSE, "_Quit")

; Add controls
GUICtrlCreateEdit("", 10, 10, 580, 290, $ES_READONLY)
$hEdit = GUICtrlGetHandle(-1)
$Button_Style = GUICtrlCreateButton("Get Style", 120, 310, 120, 40)
GUICtrlSetOnEvent(-1, "_ButtonHit")
$Button_ExStyle = GUICtrlCreateButton("Get ExStyle", 360, 310, 120, 40)
GUICtrlSetOnEvent(-1, "_ButtonHit")
$Label_1 = GUICtrlCreateLabel("", 10, 360, 580, 50, $SS_CENTER)
GUISetState()

While 1
    Sleep(20)
WEnd

Func _ButtonHit()
    Local $StyleWord
    Switch @GUI_CtrlId
        Case $Button_Style
            $StyleWord = _API_GetWindowLong ($hEdit, $GWL_STYLE)
            GUICtrlSetData($Label_1, "Current Style Of Edit Control:  0x" & Hex($StyleWord, 8) & @CRLF & "Bit breakdown:  " & _BitItOut($StyleWord))
        Case $Button_ExStyle
            $StyleWord = _API_GetWindowLong ($hEdit, $GWL_EXSTYLE)
            GUICtrlSetData($Label_1, "Extended Style Of Edit Control:  0x" & Hex($StyleWord, 8) & @CRLF & "Bit breakdown:  " & _BitItOut($StyleWord))
    EndSwitch
EndFunc   ;==>_ButtonHit

Func _BitItOut($i)
    Local $RET = "", $b, $n
    For $b = 0 To 31
        $n = 2 ^ $b
        If BitAND($i, $n) Then
            $RET &= $n & " = 0x" & Hex($n, 8) & ", "
            $i -= $n
        EndIf
    Next
    If StringRight($RET, 2) = ", " Then $RET = StringTrimRight($RET, 2)
    Return $RET
EndFunc   ;==>_BitItOut

Func _Quit()
    Exit
EndFunc   ;==>_Quit

It's amazing the things I didn't know!

:)


Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law

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First of all, PsaltyDS of course you rock! I couldn't get API_GetWindowLong or the _TargetStyle to work for me. I did some testing but obviously I was missing things. I didn't know $GWL_STYLE was already defined! Thanks for posting this it was good to explore this with you guys. Good questioning!!! Not sure why this isn't a standard function in the standard UDFs.

Secondly, ed0 I would REALLY like to see your CSV parser! I think you should post it in the example files.


A decision is a powerful thing

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