How to know if there is an image in the pic?

[Belini]

From time to time need to check for image in Pic, need to know if is empty or not.

GUICtrlSetImage ($pic_amostra, "image address"); exists precise image of this information

or

GUICtrlSetImage ($pic_amostra, ""); There is no precise image of this information

$PicState = ; Função para saber se há imagem?

msgbox(4096, "result", $PicState)

GUICtrlSetImage ($ pic_amostra, "image address"); need exists image of this information
GUICtrlSetImage ($ pic_amostra, ""); There is the need to image of this information

$ PicState =; Function to know if there is picture?

msgbox (4096, "result", $ PicState)

Edited February 14, 2014 by Belini

[Melba23]

Belini,

If this is in your own script, just use a flag to indicate if an image has been loaded.

M23

[Belini]

It is in my script but more the image is changed several times and in different parts of code and sometimes need to be blank, if I can verify directly the PIC would be better.

[BrewManNH]

Set $PicState to 1 when you set an image to the control, set $PicState to 0 when you remove it.

[Belini]

@ BrewManNH if there is no other way to check for this without changing the code I will use as you and @ Melba23 suggested.

[Belini]

The friend @joelson0007 passed me a code that does what I need, thanks to all those who helped.

#include <GUIConstantsEx.au3>
#include <ButtonConstants.au3>
#include <GuiImageList.au3>
#include <GuiButton.au3>
Example()

Func Example()
    Local $msg
    GUICreate("My GUI") ; will create a dialog box that when displayed is centered
    $b = GUICtrlCreateButton("my picture button", 10, 20, 40, 40, $BS_ICON)
    GUISetState()
    MsgBox(4096, "", "o controle tem um image?" & @CRLF & CtrlHasPic($b))
    Sleep(500)
    GUICtrlSetImage($b, "shell32.dll", 22)
    MsgBox(4096, "", "o controle tem um image?" & @CRLF & CtrlHasPic($b))

    While 1
        $msg = GUIGetMsg()

        If $msg = $GUI_EVENT_CLOSE Then ExitLoop
    WEnd
EndFunc   ;==>Example


;função para checar se o controle tem imagem
Func CtrlHasPic($h)
    Return IsPtr(_GUICtrlButton_GetImage($h))
EndFunc   ;==>CtrlHasPic

[BrewManNH]

Please note, I never said there wasn't another way to do it, M23 and I just gave you the most sensible approach, but if you want to call another 2 functions to do something go right ahead, but you're making it way more complicated than you needed to.

[Belini]

My code is huge and exchange of images is taken at several points and others need to clean pic to show a video in his place, I know you talked suggestion is sensible only because of the size of my code I needed a quicker solution.

I will use in my jukebox program: