Gui Drag and Drop Label Misbehaviour

[IAMK]

I was looking to implement some Drag and Drop GUI, and I found the following code: 

It works fine, but I noticed that when the button overlaps the label, the way the label looks changes.
Is this an issue or is there something I need to set up on my side to stop this happening?

E.g.

[Subz]

You can use _WinAPI_RedrawWindow to send a $WM_PAINT message or use SendMessage.

[Melba23]

IAMK,

What Subz said!

M23

[pixelsearch]

Hi IAMK

Glad you shared Melba's script with us, another great one !
I tried SubZ advice to avoid the issue you described, let's hope I did it right...

3 parts should be added to Melba's script. First :

#include <WinAPIGdi.au3>

Second, anywhere before While 1 :

Global $tRECT = DllStructCreate($tagRECT)

Third, replace this :

Do
    $cInfo = GUIGetCursorInfo($hGUI)
    ControlMove($hGUI, "", $iControl, $cInfo[0] - $iSubtractX, $cInfo[1] - $iSubtractY)
Until Not $cInfo[2]

with that :

GUICtrlSetState($iControl, $GUI_DISABLE)

Do
    $cInfo = GUIGetCursorInfo($hGUI)
    ControlMove($hGUI, "", $iControl, $cInfo[0] - $iSubtractX, $cInfo[1] - $iSubtractY)

    If $iControl = $cLabel Then
        DllStructSetData($tRECT,"Left" , $cInfo[0] - $iSubtractX)
        DllStructSetData($tRECT,"Top", $cInfo[1] - $iSubtractY)
        DllStructSetData($tRECT,"Right", $cInfo[0] - $iSubtractX + 60) ; 60 is label width
        DllStructSetData($tRECT,"Bottom", $cInfo[1] - $iSubtractY + 20) ; 20 is label height
        _WinAPI_RedrawWindow($hGUI, $tRECT)
    EndIf
Until Not $cInfo[2]

GUICtrlSetState($iControl, $GUI_ENABLE)

Thanks to anyone reading this to share his knowledge, in case something should be done differently

[Melba23]

pixelsearch,

No need for the struct. Just get the label handle using GUICtrlGetHandle and pass it directly to the WinAPI call.

M23

[pixelsearch]

Hi Melba23,
Yes, it works too and much easier, thanks

So IAMK, here is version 2 :

Add 3 parts to Melba's script. First :

#include <WinAPIGdi.au3>

Second, add the variable $hLabel after the existing $cLabel line :

$cLabel = GUICtrlCreateLabel("Move me", 10, 150, 60, 20)
$hLabel = GUICtrlGetHandle($cLabel)

Third, replace this :

Do
    $cInfo = GUIGetCursorInfo($hGUI)
    ControlMove($hGUI, "", $iControl, $cInfo[0] - $iSubtractX, $cInfo[1] - $iSubtractY)
Until Not $cInfo[2]

with that :

GUICtrlSetState($iControl, $GUI_DISABLE)

Do
    $cInfo = GUIGetCursorInfo($hGUI)
    ControlMove($hGUI, "", $iControl, $cInfo[0] - $iSubtractX, $cInfo[1] - $iSubtractY)

    If $iControl = $cLabel Then
        _WinAPI_RedrawWindow($hLabel)
    EndIf
Until Not $cInfo[2]

GUICtrlSetState($iControl, $GUI_ENABLE)

I like it when we learn new things

[IAMK]

Thanks. all.
That solves this issue.

There is also one other small thing I was wondering about:
How does the top-down ordering work?
It seems that the button is visually on top of the label, but the label is actually on top of the button (regardless of the order I create them in).