DPI Aware Application

Rescator · Post by **Rescator** » Sat Jan 02, 2010 2:39 pm

Here is a example on how to make your app DPI aware and auto scalable based on DPI.
There are some tiny quirks though, and this source only works properly on Windows 6.x+
On XP there will be no change.
This example uses SetProcessDPIAware() the "proper" way is to use a DPI aware manifest,
follow the urls in the source comments for more details.
Below the source are two images, these where taken from Windows 7 (which allows changing DPI by only loging out/in instead of restarting).

Ideally PureBasic would have a DPI Aware option and do this internally etc. Maybe PureBasic 5.0 ?

I believe OSX has a similar feature, not sure about all the Linux variants though.

Code: Select all

;Placed in the Public Domain by Roger Hågensen.

#PB_Compiler_Exe=#True ;This does not exist (yet?)

;http://msdn.microsoft.com/en-us/library/dd464660%28VS.85%29.aspx
Global _ScaleDPI_X_.f=1.0,_ScaleDPI_Y_.f=1.0
#DefaultDPIX=96.0 ;Different platforms might have different default DPI, Windows is 96 DPI.
#DefaultDPIY=96.0
Procedure InitScaleDPI() ;Windows 5.0 or higher needed for minimum functionality of this procedure.
 Protected dpiaware.l=#False,dc.i,lpx.i,lpy.i,dll.i,*SetProcessDPIAware,*IsProcessDPIAware,ncm.NONCLIENTMETRICS,font$,font.i
 ;This part is Windows 6.x+ only (Vista etc.) and must be done before we use devcaps.
 ;http://msdn.microsoft.com/en-us/library/dd464660%28VS.85%29.aspx#declaring_dpi_awareness
 ;You really should use the DPI aware manifest instead of SetProcessDPIAware() when possible.
 ;On Windows 2000 and XP the manifest has no effect and set dpi aware is not available,
 ;however Devicecaps still returns usefull info that can be used.
 ;Note! If the dpi aware manifest is missing on Vista and Win7 then the OS will lie on devicecaps and will autoscale the entire app window.
 CompilerIf #PB_Compiler_Exe ;Only use this in exes, as dlls inherit DPI from the calling process.
  ;If the exe or the calling exe in case of this being a dll is allready dpi aware (like through a manifest),
  ;then we skip using the the set dpi aware function, a dll should never use the set function, but it should check if the process id dpi aware
  ;and apply the proper modifiers where appropriate obviously.
  dll=OpenLibrary(#PB_Any,"user32.dll")
  If dll
	  *IsProcessDPIAware=GetFunction(dll,"IsProcessDPIAware")
   If *IsProcessDPIAware
    dpiaware=CallFunctionFast(*IsProcessDPIAware)
   EndIf
   If Not dpiaware
	   *SetProcessDPIAware=GetFunction(dll,"SetProcessDPIAware")
	   If *SetProcessDPIAware
	    CallFunctionFast(*SetProcessDPIAware)
	   EndIf
   EndIf
  EndIf
 CompilerEndIf
 dc=GetDC_(#Null)
 If dc
	 lpx=GetDeviceCaps_(dc,#LOGPIXELSX)
	 lpy=GetDeviceCaps_(dc,#LOGPIXELSY)
	 If lpx>0
 	 _ScaleDPI_X_=lpx/#DefaultDPIX
 	EndIf
	 If lpy>0
 	 _ScaleDPI_Y_=lpy/#DefaultDPIY
 	EndIf
	 ReleaseDC_(#Null,dc)
 EndIf
 ;Get the system font for message boxes etc.
 ;We default to a size of 9, which is also the Vista and Win7 default size.
 ;The OS will automatically (Vista and Win7 at least) scale the font per the current user's DPI setting.
 ncm\cbSize=SizeOf(NONCLIENTMETRICS)
 If SystemParametersInfo_(#SPI_GETNONCLIENTMETRICS,SizeOf(NONCLIENTMETRICS),ncm,#Null)
  font$=PeekS(@ncm\lfMessageFont\lfFaceName)
		font=LoadFont(#PB_Any,font$,9,#PB_Font_HighQuality)
		If font
		 SetGadgetFont(#PB_Default,FontID(font))
		EndIf
 EndIf
EndProcedure
InitScaleDPI()
Macro ScaleDPIx(x)
 (x)*_ScaleDPI_X_
EndMacro
Macro ScaleDPIy(y)
 (y)*_ScaleDPI_Y_
EndMacro

;The Gadget example from PureBasic manual.

#WindowWidth  = 390
#WindowHeight = 350

If OpenWindow(0, ScaleDPIx(100), ScaleDPIy(200), ScaleDPIx(#WindowWidth), ScaleDPIy(#WindowHeight), "PureBasic - Gadget Demonstration", #PB_Window_MinimizeGadget)

  Top = 10
  GadgetHeight = 24

  Frame3DGadget(#PB_Any, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(370), ScaleDPIy(290), "Player...") : Top+20

  StringGadget(0, ScaleDPIx(20), ScaleDPIy(Top), ScaleDPIx(200), ScaleDPIy(GadgetHeight), "")
  ButtonGadget(1, ScaleDPIx(223), ScaleDPIy(Top),  ScaleDPIx(72), ScaleDPIy(GadgetHeight), "Play")
  ButtonGadget(2, ScaleDPIx(295), ScaleDPIy(Top),  ScaleDPIx(72), ScaleDPIy(GadgetHeight), "Stop")  : Top+35
  DisableGadget(2,1)

  GadgetToolTip(1,"Play the current song")

  PanelGadget(3, ScaleDPIx(20), ScaleDPIy(Top), ScaleDPIx(#WindowWidth-50), ScaleDPIy(#WindowHeight-Top-60))
    AddGadgetItem(3, 0, "MP3 PlayList")
      ListViewGadget(4, ScaleDPIx(6), ScaleDPIy(10), ScaleDPIx(230), ScaleDPIy(148))

      For k=0 To 30
        AddGadgetItem(4, -1, "Music Song n° "+Str(k))
      Next

      ButtonGadget(5,  ScaleDPIx(250), ScaleDPIy(10), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "Add")
      ButtonGadget(6,  ScaleDPIx(250), ScaleDPIy(38), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "Remove")
      ButtonGadget(7,  ScaleDPIx(250), ScaleDPIy(66), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "Select")
      GadgetToolTip(7, "Select the current song")

      TrackBarGadget(17, ScaleDPIx(10), ScaleDPIy(168), ScaleDPIx(310), ScaleDPIy(25), 0, 100)

    AddGadgetItem(3, 1, "Options")
      Top = 10
      CheckBoxGadget(10, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(250), ScaleDPIy(GadgetHeight), "Enable low-pass filter") : Top+30
      CheckBoxGadget(11, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(250), ScaleDPIy(GadgetHeight), "Enable visual plug-in")  : Top+30
      ComboBoxGadget(12, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(250), ScaleDPIy(21)) : Top+30
        AddGadgetItem(12, -1, "FireWorks")
        AddGadgetItem(12, -1, "OpenGL spectrum")
        AddGadgetItem(12, -1, "Bump bass")
      SetGadgetState(12,0)
      DisableGadget(12,1)

      OptionGadget(13, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "640*480") : Top+20
      OptionGadget(14, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "800*600") : Top+20
      OptionGadget(15, ScaleDPIx(10), ScaleDPIy(Top), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "1024*768")
      SetGadgetState(13, 1)

      ButtonGadget(16, ScaleDPIx(150), ScaleDPIy(Top), ScaleDPIx(80), ScaleDPIy(GadgetHeight), "Info")
  CloseGadgetList()

  TextGadget  (9, ScaleDPIx(10), ScaleDPIy(#WindowHeight-30), ScaleDPIx(250), ScaleDPIy(24), "PureBasic - Gadget demonstration")
  ButtonGadget(8, ScaleDPIx(#WindowWidth-100), ScaleDPIy(#WindowHeight-36), ScaleDPIx(80), ScaleDPIy(24), "Quit")

  SetGadgetState(3, 0)

  Repeat
    EventID = WaitWindowEvent()

    If EventID = #PB_Event_Gadget

      Select EventGadget()
        Case 0
          If EventType() = #PB_EventType_ReturnKey
            MessageRequester("Info", "Return key pressed", 0)
            SetActiveGadget(0)
          EndIf

        Case 1 ; Play
          DisableGadget(2,0)  ; Enable the 'Stop' gadget
          DisableGadget(1,1)  ; Disable the 'Play' Gadget

        Case 2 ; Stop
          DisableGadget(1,0)  ; Enable the 'Play' gadget
          DisableGadget(2,1)  ; Disable the 'Stop' Gadget

        Case 4
          If EventType() = 2
            SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..
          EndIf

        Case 5 ; Add
          AddGadgetItem(4, -1, "New Item Added...")

        Case 6 ; Remove
          RemoveGadgetItem(4, GetGadgetState(4)) ; Remove the current element of the ListView

        Case 7 ; Select
          SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..

        Case 8 ; Quit...
          EventID = #PB_Event_CloseWindow

        Case 11 ; Enable PlugIn..
          DisableGadget(12, 1-GetGadgetState(11))

        Case 16 ;
          If GetGadgetState(13) : Result$ = GetGadgetText(13) : EndIf
          If GetGadgetState(14) : Result$ = GetGadgetText(14) : EndIf
          If GetGadgetState(15) : Result$ = GetGadgetText(15) : EndIf

          MessageRequester("Info", "Selected screen mode: "+Result$, 0)

        Case 17
          SetGadgetText(0, Str(GetGadgetState(17)))

      EndSelect

    EndIf

  Until EventID = #PB_Event_CloseWindow

EndIf

End

96 DPI (default)

192 DPI (200%, custom)

srod · Post by **srod** » Sat Jan 02, 2010 7:11 pm

Very interesting Rescator. Thanks for this.

Perhaps a feature request to have a 'Make application DPI aware' IDE compiler option would indeed be in order?

Rescator · Post by **Rescator** » Sat Jan 02, 2010 10:14 pm

Yeah it would be nice as it's "just" a manifest (some ccare needed as a comment on MSDN mentioned a possible issue with XP SP2 choking on a certain variation).
Still the programmer would need to take care when coding, but with thhe help of say a GetXDPI and a GetYDPI (should be possible to add that to all the supported platforms I think?) would make that easier.

SFSxOI · Post by **SFSxOI** » Sat Jan 02, 2010 10:24 pm

Very nice. But how do you use/include it with a manifest in PB? Just put the manifest in the resources?

Rescator · Post by **Rescator** » Sat Jan 02, 2010 10:34 pm

See the post in Feature requests, I think I figured out the "safe" way to add it without XP SP2 choking. (similar issue as XP had with the elevation manifest I suspect?)

Rescator · Post by **Rescator** » Sun Jan 03, 2010 12:21 am

Added a IsProcessDPIAware check to the example, no point enabling it if say a manifest has already enabled it

Rescator · Post by **Rescator** » Sun Jan 03, 2010 2:42 am

Improved the code a bit, wrote more comments in the source in particular about fonts and scaling.

Now it automatically changes the default PureBasic font to the default current font.

On Vista and Win7 for example this would be Segoe UI, on XP I'm a bit sure but most likely Tahoma or so the MSDN pages says.
The size is set to 9 as default, which is what Vista and Win7 etc uses as default. I believe 2k and XP use 8 as default.

You aren't forced to use this as the default though, just change the default font like you normally would, the only thing this changes is to a more "modern" TrueType/Open default font.

I'm not entirely sure what font it is that PureBasic uses as default but it certainly is not the actual system default font.
Maybe it's using one of these deprecated bitmap ones? (hope not) http://blogs.msdn.com/oldnewthing/archi ... 36435.aspx

srod · Post by **srod** » Sun Jan 03, 2010 11:33 am

Rescator, just a quick question if I may; just trying to understand how Vista/Win 7 adjusts the fonts? You seem to suggest that Vista will automatically adjust fonts in a dpi aware application, but that is not my understanding.

My understanding is that you have to take the dpi scale-factor into account when creating the fonts etc. Is that not correct?

i ask because your code above doesn't seem to take this into account with the fonts and so I am wondering if I am missing something?

**EDIT : hang on, PB's LoadFont() command now uses proper points (with logical inches) in it's font height and so these are automatically scaled in your code above. I am pretty sure that Vista / Win 7 will not otherwise automatically scale your fonts in a dpi aware application. Switch LoadFont() for CreateFontIndirect_() and I think you will see that your fonts are not rescaled etc. An important point I think.

Rescator · Post by **Rescator** » Sun Jan 03, 2010 6:07 pm

You're right. (Hmm! Has Fred begun to make PureBasic DPI aware silently in steps?)

I think it's got to do with the description of the lfHeight of LOGFONT
there's a MulDiv example there, my guess is the LoadFont implementation just follows that advise?
I see one can also specify a negative value but that is Windows specific I'm sure so I haven't bothered testing LoadFont with that, although a loadfont with height 0 does work.

Rescator · Post by **Rescator** » Sun Jan 03, 2010 9:43 pm

I just found out that the "Large Font" setting in Windows (dating back to Win 95) also benefit from the ScaleDPI macros etc.
As the Large Font setting in Windows will report the dpi in LOGPIXELSX and LOGPIXELSY, I do not have a Win9x setup to test on,
but this shows that taking the font and dpi into consideration in any Windows app is pretty much a must.

SFSxOI · Post by **SFSxOI** » Fri Jan 29, 2010 7:35 am

Have you found out if CoInitialize, HrInit, and CoUninitialize are really needed? Is a manifest even needed?

Thorium · Post by **Thorium** » Fri Jan 29, 2010 2:25 pm

Interessting.

Recently i wrote a program that can display the physical size of the iPhone and iPod Touch screen on the PC.
It falls in the same category i think, so here it is.

Code: Select all

#iPhone_Width  = 480
#iPhone_Height = 320
#iPhone_xDpi   = 163
#iPhone_yDpi   = 163

#iPod_Width    = 480
#iPod_Height   = 320
#iPod_xDpi     = 160
#iPod_yDpi     = 160

;retrieves the horizontal DPI of the desktop
Procedure.i Gui_GetDesktopDpiX()

  Protected hDc.i
  Protected hDpi.i
  
  hDc = GetDC_(GetDesktopWindow_())
  If hDc
    hDpi = GetDeviceCaps_(hDc, #LOGPIXELSX)
    ReleaseDC_(GetDesktopWindow_(), hDc)
  EndIf

  If hDpi = 0
    hDpi = 96
    MessageRequester(#Gui_MainTitle, "Can't retrieve horizontal DPI of desktop!" + Chr(10) + "Can't calculate correct window size.", #MB_ICONSTOP)
  EndIf

  ProcedureReturn hDpi

EndProcedure

;retrieves the vertical DPI of the desktop
Procedure.i Gui_GetDesktopDpiY()
  
  Protected hDc.i
  Protected vDpi.i
  
  hDc = GetDC_(GetDesktopWindow_())
  If hDc
    vDpi = GetDeviceCaps_(hDc, #LOGPIXELSY)
    ReleaseDC_(GetDesktopWindow_(), hDc)
  EndIf
  
  If vDpi = 0
    vDpi = 96
    MessageRequester(#Gui_MainTitle, "Can't retrieve vertical DPI of desktop!" + Chr(10) + "Can't calculate correct window size.", #MB_ICONSTOP)
  EndIf
  
  ProcedureReturn vDpi

EndProcedure

;resizes the 3D view window to the iPhone screen size
Procedure Gui_Resize3DWnd2iPhoneSize(Scale.f)

  Protected Width.i
  Protected Height.i
  Protected RelationX.f
  Protected RelationY.f
  
  RelationX = Gui_GetDesktopDpiX() / #iPhone_xDpi
  RelationY = Gui_GetDesktopDpiY() / #iPhone_yDpi
  
  Width  = #iPhone_Width * RelationX * Scale
  Height = #iPhone_Height * RelationY * Scale

  ResizeWindow(Gui_3DWnd\PbNum, #PB_Ignore, #PB_Ignore, Width, Height)

EndProcedure

;resizes the 3D view window to the iPod screen size
Procedure Gui_Resize3DWnd2iPodSize(Scale.f)

  Protected Width.i
  Protected Height.i
  Protected RelationX.f
  Protected RelationY.f
  
  RelationX = Gui_GetDesktopDpiX() / #iPod_xDpi
  RelationY = Gui_GetDesktopDpiY() / #iPod_yDpi
  
  Width  = #iPod_Width * RelationX * Scale
  Height = #iPod_Height * RelationY * Scale

  ResizeWindow(Gui_3DWnd\PbNum, #PB_Ignore, #PB_Ignore, Width, Height)

EndProcedure

Rescator · Post by **Rescator** » Sat Feb 06, 2010 1:50 am

SFSxOI wrote:Have you found out if CoInitialize, HrInit, and CoUninitialize are really needed? Is a manifest even needed?

The DPI aware manifest is needed yes, and would have to be a option in the ID just like the XP theme currently is.

As to co and Hr init etc. Not sure, it seemed to work without the Co ones but I guess Fred or Freak can answer this. (I seem to recall that Coinit is done by PB automatically in some cases or?) Not sure on HrInit. The source in 1st post seems to work ok though.

PS! I think you meant to post in the http://www.purebasic.fr/english/viewtop ... 12&t=40806 thread but I

Lunasole · Post by **Lunasole** » Sat Sep 03, 2016 4:10 pm

That DPI problem is really pain in the ass (especially for some my old programs).
Here I've made some expanded version of your code, planning to wrap all PB UI functions into scaling macro.

However it is just for testing now [and not all functions related to UI wrapped - only OpenWindow and Gadgets creation], and maybe it would be better to just scale fonts sizes down, instead of scaling every property of every UI control up ^^
I'll try it later.

Code: Select all

EnableExplicit

;{ DPI-related procs and macross }
	
	; This one is not needed if already set in manifest file [which is preffered])
	; It must be called on startup, before any window created
	; 	and SHOULD NOT be called from DLL
	; RETURN: none
	Procedure SetDPIAware()
		Protected hLib = OpenLibrary(#PB_Any, "User32.dll")
		If IsLibrary(hLib)
			If Not CallFunction(hLib, "IsProcessDPIAware") ; if process has not already DPIAware setting (using following API or manifest file)
				If CallFunction(hLib, "SetProcessDPIAware")
					; now process is "DPI-aware"
				EndIf
			EndIf
			CloseLibrary(hLib)
		EndIf
	EndProcedure
	
	
	; Placed in the Public Domain by Roger Hågensen.
	; This one calculates DPI scaling values
	; 	which you must apply to any pixel values etc when drawing UI.
	; Fonts are scaled by window automatically, so another way 
	;	can be using lesser font sizes (basing on those values), instead of scaling whole UI
	; RETURN:	_ScaleDPI_X_, _ScaleDPI_Y_ global variables updated on success
	Global.f _ScaleDPI_X_ = 1.0, _ScaleDPI_Y_ = 1.0
	#DefaultDPIX=96.0 ;Different platforms might have different default DPI, Windows is 96 DPI.
	#DefaultDPIY=96.0
	Procedure InitScaleDPI()
		Protected dc, lpx, lpy
		
		dc=GetDC_(#Null)
		If dc
			lpx=GetDeviceCaps_(dc,#LOGPIXELSX)
			lpy=GetDeviceCaps_(dc,#LOGPIXELSY)
			If lpx>0
				_ScaleDPI_X_=lpx/#DefaultDPIX
			EndIf
			If lpy>0
				_ScaleDPI_Y_=lpy/#DefaultDPIY
			EndIf
			ReleaseDC_(#Null,dc)
		EndIf
	EndProcedure
	
	; scaling macros
	Macro ScaleDPIx(x)
		(x)*_ScaleDPI_X_
	EndMacro
	Macro ScaleDPIy(y)
		(y)*_ScaleDPI_Y_
	EndMacro
	
;}

;{ PB UI-related functions wrappers }
	
	Procedure _OpenWindow (Window, x, y, InnerWidth, InnerHeight, Title$ = "", Flags = #Null, ParentID = #Null)
		Debug ScaleDPIx (x)
		Debug x
		ProcedureReturn OpenWindow (Window, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (InnerWidth), ScaleDPIy (InnerHeight), Title$, Flags, ParentID)
	EndProcedure
	Procedure _ButtonGadget (Gadget, x, y, Width, Height, Text$, Flags = #Null)
		ProcedureReturn ButtonGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$, Flags)
	EndProcedure
	Procedure _ButtonImageGadget (Gadget, x, y, Width, Height, ImageID, Flags = #Null)
		ProcedureReturn ButtonImageGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), ImageID, Flags)
	EndProcedure
	Procedure _CalendarGadget (Gadget, x, y, Width, Height, Date = #Null, Flags = #Null)
		ProcedureReturn CalendarGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Date, Flags)
	EndProcedure
	Procedure _CanvasGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn CanvasGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _CheckBoxGadget (Gadget, x, y, Width, Height, Text$, Flags = #Null)
		ProcedureReturn CheckBoxGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$, Flags)
	EndProcedure
	Procedure _ComboBoxGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn ComboBoxGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _EditorGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn EditorGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _DateGadget (Gadget, x, y, Width, Height, Mask$ = "", Date = #Null, Flags = #Null)
		ProcedureReturn DateGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Mask$, Date, Flags)
	EndProcedure
	Procedure _ExplorerComboGadget (Gadget, x, y, Width, Height, Directory$, Flags = #Null) 
		ProcedureReturn ExplorerComboGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Directory$, Flags) 
	EndProcedure
	Procedure _ExplorerListGadget (Gadget, x, y, Width, Height, Directory$, Flags = #Null)
		ProcedureReturn ExplorerListGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Directory$, Flags)
	EndProcedure
	Procedure _ExplorerTreeGadget (Gadget, x, y, Width, Height, Directory$, Flags = #Null)
		ProcedureReturn ExplorerTreeGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Directory$, Flags)
	EndProcedure
	Procedure _FrameGadget (Gadget, x, y, Width, Height, Text$, Flags = #Null)
		ProcedureReturn FrameGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$, Flags)
	EndProcedure
	Procedure _HyperLinkGadget (Gadget, x, y, Width, Height, Text$, Color, Flags = #Null)
		ProcedureReturn HyperLinkGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$, Color, Flags)
	EndProcedure
	Procedure _ImageGadget (Gadget, x, y, Width, Height, ImageID, Flags = #Null)
		ProcedureReturn ImageGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), ImageID, Flags)
	EndProcedure
	Procedure _IPAddressGadget (Gadget, x, y, Width, Height)
		ProcedureReturn IPAddressGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height))
	EndProcedure
	Procedure _ListIconGadget (Gadget, x, y, Width, Height, FirstColumnTitle$, FirstColumnWidth, Flags = #Null)
		ProcedureReturn ListIconGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), FirstColumnTitle$, FirstColumnWidth, Flags)
	EndProcedure
	Procedure _ListViewGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn ListViewGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _OpenGLGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn OpenGLGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _OptionGadget (Gadget, x, y, Width, Height, Text$)
		ProcedureReturn OptionGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$)
	EndProcedure
	Procedure _PanelGadget (Gadget, x, y, Width, Height)
		ProcedureReturn PanelGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height))
	EndProcedure
	Procedure _ProgressBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		ProcedureReturn ProgressBarGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Minimum, Maximum, Flags)
	EndProcedure
	Procedure _ScintillaGadget (Gadget, x, y, Width, Height, Callback)
		ProcedureReturn ScintillaGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Callback)
	EndProcedure
	Procedure _ScrollAreaGadget (Gadget, x, y, Width, Height, ScrollAreaWidth, ScrollAreaHeight, ScrollStep = #Null, Flags = #Null)
		ProcedureReturn ScrollAreaGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), ScrollAreaWidth, ScrollAreaHeight, ScrollStep, Flags)
	EndProcedure
	Procedure _ScrollBarGadget (Gadget, x, y, Width, Height, Min, Max, PageLength, Flags = #Null)
		ProcedureReturn ScrollBarGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Min, Max, PageLength, Flags)
	EndProcedure
	Procedure _SpinGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		ProcedureReturn SpinGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Minimum, Maximum, Flags)
	EndProcedure
	Procedure _StringGadget (Gadget, x, y, Width, Height, Content$, Flags = #Null)
		ProcedureReturn StringGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Content$, Flags)
	EndProcedure
	Procedure _TextGadget (Gadget, x, y, Width, Height, Text$, Flags = #Null)
		ProcedureReturn TextGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Text$, Flags)
	EndProcedure
	Procedure _TrackBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		ProcedureReturn TrackBarGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Minimum, Maximum, Flags)
	EndProcedure
	Procedure _TreeGadget (Gadget, x, y, Width, Height, Flags = #Null)
		ProcedureReturn TreeGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), Flags)
	EndProcedure
	Procedure _WebGadget (Gadget, x, y, Width, Height, URL$)
		ProcedureReturn WebGadget (Gadget, ScaleDPIx (x), ScaleDPIy (y), ScaleDPIx (Width), ScaleDPIy (Height), URL$)
	EndProcedure
	
;}

;{ And macross to use wrappers }
	
	Macro OpenWindow (Window, x, y, InnerWidth, InnerHeight, Title = "", Flags = #Null, ParentID = #Null)
		_OpenWindow (Window, x, y, InnerWidth, InnerHeight, Title, Flags, ParentID)
	EndMacro
	Macro ButtonGadget (Gadget, x, y, Width, Height, Text, Flags = #Null)
		_ButtonGadget (Gadget, x, y, Width, Height, Text, Flags)
	EndMacro
	Macro ButtonImageGadget (Gadget, x, y, Width, Height, ImageID, Flags = #Null)
		_ButtonImageGadget (Gadget, x, y, Width, Height, ImageID, Flags)
	EndMacro
	Macro CalendarGadget (Gadget, x, y, Width, Height, Date = #Null, Flags = #Null)
		_CalendarGadget (Gadget, x, y, Width, Height, Date, Flags)
	EndMacro
	Macro CanvasGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_CanvasGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro CheckBoxGadget (Gadget, x, y, Width, Height, Text, Flags = #Null)
		_CheckBoxGadget (Gadget, x, y, Width, Height, Text, Flags)
	EndMacro
	Macro ComboBoxGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_ComboBoxGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro EditorGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_EditorGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro DateGadget (Gadget, x, y, Width, Height, Mask = #Null, Date = #Null, Flags = #Null)
		_DateGadget (Gadget, x, y, Width, Height, Mask, Date, Flags)
	EndMacro
	Macro ExplorerComboGadget (Gadget, x, y, Width, Height, Directory, Flags = #Null) 
		_ExplorerComboGadget (Gadget, x, y, Width, Height, Directory, Flags) 
	EndMacro
	Macro ExplorerListGadget (Gadget, x, y, Width, Height, Directory, Flags = #Null)
		_ExplorerListGadget (Gadget, x, y, Width, Height, Directory, Flags)
	EndMacro
	Macro ExplorerTreeGadget (Gadget, x, y, Width, Height, Directory, Flags = #Null)
		_ExplorerTreeGadget (Gadget, x, y, Width, Height, Directory, Flags)
	EndMacro
	Macro FrameGadget (Gadget, x, y, Width, Height, Text, Flags = #Null)
		_FrameGadget (Gadget, x, y, Width, Height, Text, Flags)
	EndMacro
	Macro HyperLinkGadget (Gadget, x, y, Width, Height, Text, Color, Flags = #Null)
		_HyperLinkGadget (Gadget, x, y, Width, Height, Text, Color, Flags)
	EndMacro
	Macro ImageGadget (Gadget, x, y, Width, Height, ImageID, Flags = #Null)
		_ImageGadget (Gadget, x, y, Width, Height, ImageID, Flags)
	EndMacro
	Macro IPAddressGadget (Gadget, x, y, Width, Height)
		_IPAddressGadget (Gadget, x, y, Width, Height)
	EndMacro
	Macro ListIconGadget (Gadget, x, y, Width, Height, FirstColumnTitle, FirstColumnWidth, Flags = #Null)
		_ListIconGadget (Gadget, x, y, Width, Height, FirstColumnTitle, FirstColumnWidth, Flags)
	EndMacro
	Macro ListViewGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_ListViewGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro OpenGLGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_OpenGLGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro OptionGadget (Gadget, x, y, Width, Height, Text)
		_OptionGadget (Gadget, x, y, Width, Height, Text)
	EndMacro
	Macro PanelGadget (Gadget, x, y, Width, Height)
		_PanelGadget (Gadget, x, y, Width, Height)
	EndMacro
	Macro ProgressBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		_ProgressBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags)
	EndMacro
	Macro ScintillaGadget (Gadget, x, y, Width, Height, Callback)
		_ScintillaGadget (Gadget, x, y, Width, Height, Callback)
	EndMacro
	Macro ScrollAreaGadget (Gadget, x, y, Width, Height, ScrollAreaWidth, ScrollAreaHeight, ScrollStep = #Null, Flags = #Null)
		_ScrollAreaGadget (Gadget, x, y, Width, Height, ScrollAreaWidth, ScrollAreaHeight, ScrollStep, Flags)
	EndMacro
	Macro ScrollBarGadget (Gadget, x, y, Width, Height, Min, Max, PageLength, Flags = #Null)
		_ScrollBarGadget (Gadget, x, y, Width, Height, Min, Max, PageLength, Flags)
	EndMacro
	Macro SpinGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		_SpinGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags)
	EndMacro
	Macro StringGadget (Gadget, x, y, Width, Height, Content, Flags = #Null)
		_StringGadget (Gadget, x, y, Width, Height, Content, Flags)
	EndMacro
	Macro TextGadget (Gadget, x, y, Width, Height, Text, Flags = #Null)
		_TextGadget (Gadget, x, y, Width, Height, Text, Flags)
	EndMacro
	Macro TrackBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags = #Null)
		_TrackBarGadget (Gadget, x, y, Width, Height, Minimum, Maximum, Flags)
	EndMacro
	Macro TreeGadget (Gadget, x, y, Width, Height, Flags = #Null)
		_TreeGadget (Gadget, x, y, Width, Height, Flags)
	EndMacro
	Macro WebGadget (Gadget, x, y, Width, Height, URL)
		_WebGadget (Gadget, x, y, Width, Height, URL)
	EndMacro
	
;}

; Use DPI scaling
SetDPIAware()
InitScaleDPI()
; After this can start creating windows, drawing UI, etc


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Some Example
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
DisableExplicit
#WindowWidth  = 390
#WindowHeight = 350

If OpenWindow(0, 100, 200, #WindowWidth, #WindowHeight, "PureBasic - Gadget Demonstration", #PB_Window_MinimizeGadget)
	
	Top = 10
	GadgetHeight = 24
	
	FrameGadget(#PB_Any, 10, Top, 370, 290, "Player...") : Top+20
	
	StringGadget(0,  20, Top, 200, GadgetHeight, "")
	ButtonGadget(1, 223, Top,  72, GadgetHeight, "Play")
	ButtonGadget(2, 295, Top,  72, GadgetHeight, "Stop")  : Top+35
	DisableGadget(2,1)
	
	GadgetToolTip(1,"Play the current song")
	
	PanelGadget(3, 20, Top, #WindowWidth-50, #WindowHeight-Top-60)
	AddGadgetItem(3, 0, "MP3 PlayList")
	ListViewGadget(4, 6, 10, 230, 148)
	
	For k=0 To 30
		AddGadgetItem(4, -1, "Music Song n° "+Str(k))
	Next
	
	ButtonGadget(5,  250, 10, 80, GadgetHeight, "Add")
	ButtonGadget(6,  250, 38, 80, GadgetHeight, "Remove")
	ButtonGadget(7,  250, 66, 80, GadgetHeight, "Select")
	GadgetToolTip(7, "Select the current song")
	
	TrackBarGadget(17, 10, 168, 310, 25, 0, 100)
	
	AddGadgetItem(3, 1, "Options")
	Top = 10
	CheckBoxGadget(10, 10, Top, 250, GadgetHeight, "Enable low-pass filter") : Top+30
	CheckBoxGadget(11, 10, Top, 250, GadgetHeight, "Enable visual plug-in")  : Top+30
	ComboBoxGadget(12, 10, Top, 250, 21) : Top+30
	AddGadgetItem(12, -1, "FireWorks")
	AddGadgetItem(12, -1, "OpenGL spectrum")
	AddGadgetItem(12, -1, "Bump bass")
	SetGadgetState(12,0)
	DisableGadget(12,1)
	
	OptionGadget(13, 10, Top, 80, GadgetHeight, "640*480") : Top+20
	OptionGadget(14, 10, Top, 80, GadgetHeight, "800*600") : Top+20
	OptionGadget(15, 10, Top, 80, GadgetHeight, "1024*768")
	SetGadgetState(13, 1)
	
	ButtonGadget(16, 150, Top, 80, GadgetHeight, "Info")
	CloseGadgetList()
	
	TextGadget  (9, 10, #WindowHeight-30, 250, 24, "PureBasic - Gadget demonstration")
	ButtonGadget(8, #WindowWidth-100, #WindowHeight-36, 80, 24, "Quit")
	
	SetGadgetState(3, 0)
	
	Repeat
		Event = WaitWindowEvent()
		
		If Event = #PB_Event_Gadget
			
			Select EventGadget()
				Case 0
					If EventType() = #PB_EventType_ReturnKey
						MessageRequester("Info", "Return key pressed", 0)
						SetActiveGadget(0)
					EndIf
					
				Case 1 ; Play
					DisableGadget(2,0)  ; Enable the 'Stop' gadget
					DisableGadget(1,1)	; Disable the 'Play' Gadget
					
				Case 2 ; Stop
					DisableGadget(1,0)  ; Enable the 'Play' gadget
					DisableGadget(2,1)	; Disable the 'Stop' Gadget
					
				Case 4
					If EventType() = 2
						SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..
					EndIf
					
				Case 5 ; Add
					AddGadgetItem(4, -1, "New Item Added...")
					
				Case 6 ; Remove
					RemoveGadgetItem(4, GetGadgetState(4)) ; Remove the current element of the ListView
					
				Case 7 ; Select
					SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..
					
				Case 8 ; Quit...
					Event = #PB_Event_CloseWindow
					
				Case 11 ; Enable PlugIn..
					DisableGadget(12, 1-GetGadgetState(11))
					
				Case 16 ;
					If GetGadgetState(13) : Result$ = GetGadgetText(13) : EndIf
					If GetGadgetState(14) : Result$ = GetGadgetText(14) : EndIf
					If GetGadgetState(15) : Result$ = GetGadgetText(15) : EndIf
					
					MessageRequester("Info", "Selected screen mode: "+Result$, 0)
					
				Case 17
					SetGadgetText(0, Str(GetGadgetState(17)))
					
			EndSelect
			
		EndIf
		
	Until Event = #PB_Event_CloseWindow
	
EndIf

End

Lunasole · Post by **Lunasole** » Sat Sep 03, 2016 5:47 pm

This alternative shorten variant seems also working fine.
For now I'm not sure which of them is better ^^ Just the following is much simpler and clear.

Code: Select all

EEnableExplicit

;{ DPI-related procs and macross }
	
	; This one is not needed if already set in manifest file [which is preffered])
	; It must be called on startup, before any window created
	; 	and SHOULD NOT be called from DLL
	; RETURN: none
	Procedure SetDPIAware()
		Protected hLib = OpenLibrary(#PB_Any, "User32.dll")
		If IsLibrary(hLib)
			If Not CallFunction(hLib, "IsProcessDPIAware") ; if process has not already DPIAware setting (using following API or manifest file)
				If CallFunction(hLib, "SetProcessDPIAware")
					; now process is "DPI-aware"
				EndIf
			EndIf
			CloseLibrary(hLib)
		EndIf
	EndProcedure
	
	
	; Placed in the Public Domain by Roger Hågensen.
	; This one calculates DPI scaling values
	; 	which you must apply to any pixel values etc when drawing UI.
	; Fonts are scaled by window automatically, so another way 
	;	can be using lesser font sizes (basing on those values), instead of scaling whole UI
	; RETURN:	_ScaleDPI_X_, _ScaleDPI_Y_ global variables updated on success
	Global.f _ScaleDPI_X_ = 1.0, _ScaleDPI_Y_ = 1.0
	#DefaultDPIX=96.0 ;Different platforms might have different default DPI, Windows is 96 DPI.
	#DefaultDPIY=96.0
	Procedure InitScaleDPI()
		Protected dc, lpx, lpy
		
		dc=GetDC_(#Null)
		If dc
			lpx=GetDeviceCaps_(dc,#LOGPIXELSX)
			lpy=GetDeviceCaps_(dc,#LOGPIXELSY)
			If lpx>0
				_ScaleDPI_X_=lpx/#DefaultDPIX
			EndIf
			If lpy>0
				_ScaleDPI_Y_=lpy/#DefaultDPIY
			EndIf
			ReleaseDC_(#Null,dc)
		EndIf
	EndProcedure
	
	; scaling macros
	Macro ScaleDPIxDown(x)
		(x)/_ScaleDPI_X_
	EndMacro
	Macro ScaleDPIyDown(y)
		(y)/_ScaleDPI_Y_
	EndMacro
	
;}

;{ PB Font-related functions wrappers }
	
	Procedure _LoadFont (Font, Name$, Height, Style = #Null)
		ProcedureReturn LoadFont(Font, Name$, ScaleDPIyDown(Height), Style)
	EndProcedure

;}

;{ And macross to use wrappers }

	Macro LoadFont(Font, Name, Height, Style = #Null)
		_LoadFont (Font, Name, Height, Style)
	EndMacro
	
;}


; Use DPI scaling
SetDPIAware()
InitScaleDPI()
; After this can start creating windows, drawing UI, etc


; That's much shorter alternative solution and it seems working fine.
; You just decreasing all your fonts by % on which Windows enlarges them.
; Thus kicking windows ass and your UI remains exact as it should be (only caption font becomes badly enlarged)
; DPIAware of course has to be set too
LoadFont(1, "Tahoma", 9)
SetGadgetFont(#PB_Default, FontID(1))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Some Example
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
DisableExplicit
#WindowWidth  = 390
#WindowHeight = 350

If OpenWindow(0, 100, 200, #WindowWidth, #WindowHeight, "PureBasic - Gadget Demonstration", #PB_Window_MinimizeGadget)
	
	Top = 10
	GadgetHeight = 24
	
	FrameGadget(#PB_Any, 10, Top, 370, 290, "Player...") : Top+20
	
	StringGadget(0,  20, Top, 200, GadgetHeight, "")
	ButtonGadget(1, 223, Top,  72, GadgetHeight, "Play")
	ButtonGadget(2, 295, Top,  72, GadgetHeight, "Stop")  : Top+35
	DisableGadget(2,1)
	
	GadgetToolTip(1,"Play the current song")
	
	PanelGadget(3, 20, Top, #WindowWidth-50, #WindowHeight-Top-60)
	AddGadgetItem(3, 0, "MP3 PlayList")
	ListViewGadget(4, 6, 10, 230, 148)
	
	For k=0 To 30
		AddGadgetItem(4, -1, "Music Song n° "+Str(k))
	Next
	
	ButtonGadget(5,  250, 10, 80, GadgetHeight, "Add")
	ButtonGadget(6,  250, 38, 80, GadgetHeight, "Remove")
	ButtonGadget(7,  250, 66, 80, GadgetHeight, "Select")
	GadgetToolTip(7, "Select the current song")
	
	TrackBarGadget(17, 10, 168, 310, 25, 0, 100)
	
	AddGadgetItem(3, 1, "Options")
	Top = 10
	CheckBoxGadget(10, 10, Top, 250, GadgetHeight, "Enable low-pass filter") : Top+30
	CheckBoxGadget(11, 10, Top, 250, GadgetHeight, "Enable visual plug-in")  : Top+30
	ComboBoxGadget(12, 10, Top, 250, 21) : Top+30
	AddGadgetItem(12, -1, "FireWorks")
	AddGadgetItem(12, -1, "OpenGL spectrum")
	AddGadgetItem(12, -1, "Bump bass")
	SetGadgetState(12,0)
	DisableGadget(12,1)
	
	OptionGadget(13, 10, Top, 80, GadgetHeight, "640*480") : Top+20
	OptionGadget(14, 10, Top, 80, GadgetHeight, "800*600") : Top+20
	OptionGadget(15, 10, Top, 80, GadgetHeight, "1024*768")
	SetGadgetState(13, 1)
	
	ButtonGadget(16, 150, Top, 80, GadgetHeight, "Info")
	CloseGadgetList()
	
	TextGadget  (9, 10, #WindowHeight-30, 250, 24, "PureBasic - Gadget demonstration")
	ButtonGadget(8, #WindowWidth-100, #WindowHeight-36, 80, 24, "Quit")
	
	SetGadgetState(3, 0)
	
	Repeat
		Event = WaitWindowEvent()
		
		If Event = #PB_Event_Gadget
			
			Select EventGadget()
				Case 0
					If EventType() = #PB_EventType_ReturnKey
						MessageRequester("Info", "Return key pressed", 0)
						SetActiveGadget(0)
					EndIf
					
				Case 1 ; Play
					DisableGadget(2,0)  ; Enable the 'Stop' gadget
					DisableGadget(1,1)	; Disable the 'Play' Gadget
					
				Case 2 ; Stop
					DisableGadget(1,0)  ; Enable the 'Play' gadget
					DisableGadget(2,1)	; Disable the 'Stop' Gadget
					
				Case 4
					If EventType() = 2
						SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..
					EndIf
					
				Case 5 ; Add
					AddGadgetItem(4, -1, "New Item Added...")
					
				Case 6 ; Remove
					RemoveGadgetItem(4, GetGadgetState(4)) ; Remove the current element of the ListView
					
				Case 7 ; Select
					SetGadgetText(0, GetGadgetText(4)) ; Get the current item from the ListView..
					
				Case 8 ; Quit...
					Event = #PB_Event_CloseWindow
					
				Case 11 ; Enable PlugIn..
					DisableGadget(12, 1-GetGadgetState(11))
					
				Case 16 ;
					If GetGadgetState(13) : Result$ = GetGadgetText(13) : EndIf
					If GetGadgetState(14) : Result$ = GetGadgetText(14) : EndIf
					If GetGadgetState(15) : Result$ = GetGadgetText(15) : EndIf
					
					MessageRequester("Info", "Selected screen mode: "+Result$, 0)
					
				Case 17
					SetGadgetText(0, Str(GetGadgetState(17)))
					
			EndSelect
			
		EndIf
		
	Until Event = #PB_Event_CloseWindow
	
EndIf

End

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