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Cybernetic

Making an image control transparent

7 posts in this topic

Hello everyone,

Ive searched the forums for this to no avail, everything i find is way over the top complicated. All i need is a code that makes an image control be able to be set to a transparent value. IE: 50.

Is this possible without 1000 lines of complex code?

thank you

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Not that I have a way of doing this, but what's wrong with 1000 lines of code if it accomplishes what you want? It's usually nothing more than copying it into your script and calling the function, usually hardly any typing needed.

BTW, it's hardly ever more than 50 lines of code to accomplish most tasks like that.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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Thanks for the reply.

If its only 50 lines of code or so, can i please have an example? Would be much appreciated!

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#4 ·  Posted (edited)

Have a look

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <WinAPI.au3>

$hGUI = GUICreate("My GUI edit") ; will create a dialog box that when displayed is centered
$iPic = GUICtrlCreatePic(StringReplace(@AutoItExe, "Autoit3.exe", "Examples\GUI\msoobe.jpg"), 2, 2, 394, 268)
_GuiCtrlMakeTrans($iPic, 100)
GUISetState()


While True

    Switch GUIGetMsg()

        Case $GUI_EVENT_CLOSE

            Exit

    EndSwitch

WEnd


Func _GuiCtrlMakeTrans($iCtrlID, $iTrans = 255)

    Global $pHwnd, $nHwnd, $aPos, $a

    $hWnd = GUICtrlGetHandle($iCtrlID);Get the control handle
    $pHwnd = _WinAPI_GetParent($hWnd);Get the parent Gui Handle
    $aPos = ControlGetPos($pHwnd, "", $hWnd);Get the current pos of the control

    $nHwnd = GUICreate("", $aPos[2], $aPos[3], $aPos[0], $aPos[1], 0x80000000, 0x00080000 + 0x00000040, $pHwnd);greate a gui in the position of the control

    _WinAPI_SetParent($hWnd, $nHwnd);change the parent of the control to the new gui
    ControlMove($nHwnd, '', $hWnd, 0, 0);Move the control to 0,0 of the newly created child gui
    GUISetState(@SW_SHOW, $nHwnd);show the new child gui

    WinSetTrans($nHwnd, "", $iTrans);set the transparency

    GUISwitch($pHwnd);switch back to the parent Gui

    Return $nHwnd;Return the handle for the new Child gui

EndFunc   ;==>_GuiCtrlMakeTrans

>Reference

Less than 30lines of code if you remove blank lines - Regards :)

Edited by PhoenixXL

My code:

PredictText: Predict Text of an Edit Control Like Scite. Remote Gmail: Execute your Scripts through Gmail. StringRegExp:Share and learn RegExp.

Run As System: A command line wrapper around PSEXEC.exe to execute your apps scripts as System (LSA). Database: An easier approach for _SQ_LITE beginners.

MathsEx: A UDF for Fractions and LCM, GCF/HCF. FloatingText: An UDF for make your text floating. Clipboard Extendor: A clipboard monitoring tool. 

Custom ScrollBar: Scroll Bar made with GDI+, user can use bitmaps instead. RestrictEdit_SRE: Restrict text in an Edit Control through a Regular Expression.

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#5 ·  Posted (edited)

Hi Phoenix, that works great, however, if i want to switch transparency values on the control, the control manages to move out of place and get all wierd?
 
check the code that i modified.
 

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <WinAPI.au3>
local $action

$hGUI = GUICreate("My GUI edit") ; will create a dialog box that when displayed is centered
$iPic = GUICtrlCreatePic(StringReplace(@AutoItExe, "Autoit3.exe", "Examples\GUI\msoobe.jpg"), 2, 2, 100, 100)
_GuiCtrlMakeTrans($iPic, 100)
GUISetState()

hotkeyset("{1}", "test1")
hotkeyset("{2}", "test2")

While $action <> $GUI_EVENT_CLOSE
    $action = GUIGetMsg()

WEnd

func test1()
_GuiCtrlMakeTrans($iPic, 155)
    endfunc

    func test2()
_GuiCtrlMakeTrans($iPic, 100)
    endfunc

Func _GuiCtrlMakeTrans($iCtrlID, $iTrans = 255)

    Global $pHwnd, $nHwnd, $aPos, $a

    $hWnd = GUICtrlGetHandle($iCtrlID);Get the control handle
    $pHwnd = _WinAPI_GetParent($hWnd);Get the parent Gui Handle
    $aPos = ControlGetPos($pHwnd, "", $hWnd);Get the current pos of the control

    $nHwnd = GUICreate("", $aPos[2], $aPos[3], $aPos[0], $aPos[1], 0x80000000, 0x00080000 + 0x00000040, $pHwnd);greate a gui in the position of the control

    _WinAPI_SetParent($hWnd, $nHwnd);change the parent of the control to the new gui
    ControlMove($nHwnd, '', $hWnd, 0, 0);Move the control to 0,0 of the newly created child gui
    GUISetState(@SW_SHOW, $nHwnd);show the new child gui

    WinSetTrans($nHwnd, "", $iTrans);set the transparency

    GUISwitch($pHwnd);switch back to the parent Gui

    Return $nHwnd;Return the handle for the new Child gui

EndFunc   ;==>_GuiCtrlMakeTrans

Hitting the 1 and 2 key will change the transparency of the control, but doing so will screw it up aswell.

Edited by Cybernetic

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#6 ·  Posted (edited)

You need to understand the concept. You can't create a transparent pic control through direct control creation therefore a child window was created that perfectly contained the control and transparency of the child window rather than the control was set to the desired value. Now if you want to change the transparency of the window you have to change it explicitly, otherwise calling the function again would create another Child GUI.

Have a look at the following,

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <WinAPI.au3>
Local $action

$hGUI = GUICreate("My GUI edit") ; will create a dialog box that when displayed is centered
GUICtrlCreatePic(StringReplace(@AutoItExe, "Autoit3.exe", "Examples\GUI\msoobe.jpg"), 2, 2, 100, 100)
Global $hTransparentPic = _GuiCtrlMakeTrans(-1, 100)
GUISetState()

HotKeySet("{1}", "test1")
HotKeySet("{2}", "test2")

While $action <> $GUI_EVENT_CLOSE
    $action = GUIGetMsg()

WEnd

Func test1()
    _ChangeTransparency($hTransparentPic, 155)
EndFunc   ;==>test1

Func test2()
    _ChangeTransparency($hTransparentPic, 100)
EndFunc   ;==>test2

Func _GuiCtrlMakeTrans($iCtrlID, $iTrans = 255)

    Global $pHwnd, $nHwnd, $aPos, $a

    $hWnd = GUICtrlGetHandle($iCtrlID);Get the control handle
    $pHwnd = _WinAPI_GetParent($hWnd);Get the parent Gui Handle
    $aPos = ControlGetPos($pHwnd, "", $hWnd);Get the current pos of the control

    $nHwnd = GUICreate("", $aPos[2], $aPos[3], $aPos[0], $aPos[1], 0x80000000, 0x00080000 + 0x00000040, $pHwnd);greate a gui in the position of the control

    _WinAPI_SetParent($hWnd, $nHwnd);change the parent of the control to the new gui
    ControlMove($nHwnd, '', $hWnd, 0, 0);Move the control to 0,0 of the newly created child gui
    GUISetState(@SW_SHOW, $nHwnd);show the new child gui

    WinSetTrans($nHwnd, "", $iTrans);set the transparency

    GUISwitch($pHwnd);switch back to the parent Gui

    Return $nHwnd;Return the handle for the new Child gui

EndFunc   ;==>_GuiCtrlMakeTrans

Func _ChangeTransparency($hCtrl, $iTrans)

    WinSetTrans($hCtrl, "",$iTrans)
    ;change the transparency of the window.

EndFunc

Try to learn and understand the code. Regards :)

Edited by PhoenixXL

My code:

PredictText: Predict Text of an Edit Control Like Scite. Remote Gmail: Execute your Scripts through Gmail. StringRegExp:Share and learn RegExp.

Run As System: A command line wrapper around PSEXEC.exe to execute your apps scripts as System (LSA). Database: An easier approach for _SQ_LITE beginners.

MathsEx: A UDF for Fractions and LCM, GCF/HCF. FloatingText: An UDF for make your text floating. Clipboard Extendor: A clipboard monitoring tool. 

Custom ScrollBar: Scroll Bar made with GDI+, user can use bitmaps instead. RestrictEdit_SRE: Restrict text in an Edit Control through a Regular Expression.

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Phoenix, i do understand the concept, i was only wondering if there was a work around to avoid the GUI screwing up due to rapid change of the transparency. Seems like you provided a solution and so i thank you!

thank you for the help, much appreciated!

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