5 replies to this topic

[tip]

Hi,

I recently needed to place a semi transparent layer over a background image in order to make my label(text) controls more readable. Although I've tinkered with GDI+ functions, child guis etc., in the end I've come up with this. This UDF takes advantage of trancexx's GIFAnimations UDF and creates semi-transparent layer using several embeded(binary) PNG images.

I think it is very easy to use and it does the job the effective way without calling/registering bunch of redraw functions etc. (thanks to GIFAnimations UDF.)

An alternative function which creates the semi-transparent layer as child gui is also included. I really prefer _CreateBlankBox but it can be helpful if you are curious.

I hope it will be useful.

Sincerely,
Tip


P.S.: Example is included...

Attached Files

•  CreateBlankBox.zip   71.31K   309 downloads

Edited by tip, 12 June 2011 - 09:38 AM.

[Digisoul]

Great approach Tip!

[UEZ]

Looks nice!

Br,
UEZ

[picea892]

Very neat...very complicated....I have experimented with this off and on over the years and come up with the below. There are known repaint problems with the controltoroundedrectangle function. But otherwise it is the effect you are looking for.

Picea892

AutoIt        expandcollapse  popup

#include <GUIConstantsEx.au3>
#include <WINAPI.au3>
#include <GDIPlus.au3>

commonbck()

Func commonbck()
    $Gui = GUICreate("", 400,300,-1,-1)
    $bckpic_prime= GUICtrlCreatePic("BkgPic.jpg",0,0,400,300)
  GuiCtrlSetState(-1,$GUI_DISABLE)
    $bckpic= GUICtrlCreatePic("",50,50,300, 150)
    GuiCtrlSetState(-1,$GUI_DISABLE)
    background(-1)

    $title=GUICtrlCreateLabel("Transparent background, only one GUI",75,55,260,120)
    GUICtrlSetFont(-1,20,400,1,"Verdana")
    GUICtrlSetColor(-1,"0x000022")
    GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT)
    GUISetState()
        _ControlToRoundedRectangle($bckpic,0,0,270, 120,24)
EndFunc

While 1
sleep(50)
        $msg = GUIGetMsg()
        Select
            Case $msg = $GUI_EVENT_CLOSE
                Exit
        EndSelect
WEnd

func background($control)
    _GDIPlus_Startup ()
    $hwd=GUICtrlGetHandle($control)
    ;$guiname=_WinAPI_GetParent($hwd)
    $width=_WinAPI_GetClientWidth($hwd)
    $height=_WinAPI_GetClientHeight($hwd)
    $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hwd)
    $hBitmap1 = _GDIPlus_BitmapCreateFromGraphics($width,$height, $hGraphic)
    $hImage1=_GDIPlus_ImageGetGraphicsContext($hBitmap1)
    _GDIPlus_GraphicsSetSmoothingMode($hGraphic, 4)

for $p = 0 to $width step 1

    $hPen2=_GDIPlus_PenCreate(BitOR(0x32000000,0x000000),1)
    _GDIPlus_GraphicsDrawLine($hImage1,$p,1,$p,$height,$hPen2)
 _GDIPlus_PenDispose($hPen2)
Next
    _GDIPlus_GraphicsSetSmoothingMode($hImage1, 2)
    $hBMP1 = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap1)
    _WinAPI_DeleteObject(GUICtrlSendMsg($control, 0x0172, 0, $hBMP1))
    _GDIPlus_GraphicsDispose($hImage1)
    _WinAPI_DeleteObject($hBMP1)
    _GDIPlus_BitmapDispose($hBitmap1)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown ()
EndFunc 


Func _ControlToRoundedRectangle($aControl,$X1,$Y1,$X2,$Y2,$X3)
    Local $l
    Local $handle = GUICtrlGetHandle($aControl)
    $l = DllCall("gdi32.dll","int","CreateRoundRectRgn","int",$X1,"int",$Y1,"int",$X2,"int",$Y2,"int",$X3,"int",$X3)
    DllCall("user32.dll","int","SetWindowRgn","hwnd",$handle,"int",$l[0],"int",True)
EndFunc
Func startbmp($iWidth, $iHeight)
    ;Create a new bitmap, this way the original opened png is left unchanged
     $hBitmap = _GDIPlus_GraphicsCreateFromHWND(WinGetHandle($GUI))
    $hImage =  _GDIPlus_BitmapCreateFromGraphics($iWidth, $iHeight, $hBitmap)
    _WinAPI_DeleteObject($hBitmap)
    Return $hImage
EndFunc

[Digisoul]

Very neat...very complicated....I have experimented with this off and on over the years and come up with the below. There are known repaint problems with the controltoroundedrectangle function. But otherwise it is the effect you are looking for.

Picea892

AutoIt        expandcollapse  popup

#include <GUIConstantsEx.au3>
#include <WINAPI.au3>
#include <GDIPlus.au3>

commonbck()

Func commonbck()
    $Gui = GUICreate("", 400,300,-1,-1)
    $bckpic_prime= GUICtrlCreatePic("BkgPic.jpg",0,0,400,300)
  GuiCtrlSetState(-1,$GUI_DISABLE)
    $bckpic= GUICtrlCreatePic("",50,50,300, 150)
    GuiCtrlSetState(-1,$GUI_DISABLE)
    background(-1)

    $title=GUICtrlCreateLabel("Transparent background, only one GUI",75,55,260,120)
    GUICtrlSetFont(-1,20,400,1,"Verdana")
    GUICtrlSetColor(-1,"0x000022")
    GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT)
    GUISetState()
        _ControlToRoundedRectangle($bckpic,0,0,270, 120,24)
EndFunc

While 1
sleep(50)
        $msg = GUIGetMsg()
        Select
            Case $msg = $GUI_EVENT_CLOSE
                Exit
        EndSelect
WEnd

func background($control)
    _GDIPlus_Startup ()
    $hwd=GUICtrlGetHandle($control)
    ;$guiname=_WinAPI_GetParent($hwd)
    $width=_WinAPI_GetClientWidth($hwd)
    $height=_WinAPI_GetClientHeight($hwd)
    $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hwd)
    $hBitmap1 = _GDIPlus_BitmapCreateFromGraphics($width,$height, $hGraphic)
    $hImage1=_GDIPlus_ImageGetGraphicsContext($hBitmap1)
    _GDIPlus_GraphicsSetSmoothingMode($hGraphic, 4)

for $p = 0 to $width step 1

    $hPen2=_GDIPlus_PenCreate(BitOR(0x32000000,0x000000),1)
    _GDIPlus_GraphicsDrawLine($hImage1,$p,1,$p,$height,$hPen2)
 _GDIPlus_PenDispose($hPen2)
Next
    _GDIPlus_GraphicsSetSmoothingMode($hImage1, 2)
    $hBMP1 = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap1)
    _WinAPI_DeleteObject(GUICtrlSendMsg($control, 0x0172, 0, $hBMP1))
    _GDIPlus_GraphicsDispose($hImage1)
    _WinAPI_DeleteObject($hBMP1)
    _GDIPlus_BitmapDispose($hBitmap1)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown ()
EndFunc 


Func _ControlToRoundedRectangle($aControl,$X1,$Y1,$X2,$Y2,$X3)
    Local $l
    Local $handle = GUICtrlGetHandle($aControl)
    $l = DllCall("gdi32.dll","int","CreateRoundRectRgn","int",$X1,"int",$Y1,"int",$X2,"int",$Y2,"int",$X3,"int",$X3)
    DllCall("user32.dll","int","SetWindowRgn","hwnd",$handle,"int",$l[0],"int",True)
EndFunc
Func startbmp($iWidth, $iHeight)
    ;Create a new bitmap, this way the original opened png is left unchanged
    $hBitmap = _GDIPlus_GraphicsCreateFromHWND(WinGetHandle($GUI))
    $hImage =  _GDIPlus_BitmapCreateFromGraphics($iWidth, $iHeight, $hBitmap)
    _WinAPI_DeleteObject($hBitmap)
    Return $hImage
EndFunc

Your example is quite simple, but what if i need the borders around the box with different colors ?

[Beege]

Very cool!