A problem with GETCURSORPOS() and widescreen-monitor ?

[ukoenig]

I tested one of my old colorpicker-solutions.
It seems with my widescreen-monitor it doesn't work anymore ?
The cursor returns a wrong screenarea ( must return the color on mouseposition ).
I remember with my old monitor 4:3 it was ok.



DEFINED

local hDeskTop := GETDC(0)
local a := GETCURSORPOS()
local nColor := GETPIXEL( hDeskTop, a[2], a[1] )
...
...

any changes needed because of the monitor-resolution ?

regards
Uwe

[Enrico Maria Giordano]

Look if this sample can be of any help:

Code: Select all | Expand

#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL oDlg

    DEFINE DIALOG oDlg

    ACTIVATE DIALOG oDlg;
             ON CLICK DRAGDLG( oDlg );
             CENTER

    RETURN NIL


STATIC FUNCTION DRAGDLG( oDlg )

    LOCAL aCoo := GETWNDRECT( oDlg:hWnd )
    LOCAL aOrg := GETCURSORPOS()

    LOCAL aPos

    WHILE GETKEYSTATE( VK_LBUTTON )
        aPos = GETCURSORPOS()

        MOVEWINDOW( oDlg:hWnd, aCoo[ 1 ] + aPos[ 1 ] - aOrg[ 1 ], aCoo[ 2 ] + aPos[ 2 ] - aOrg[ 2 ], , , .T. )

        SYSREFRESH()
    ENDDO

    RETURN NIL

EMG

[ukoenig]

Enrico,

it is a test with a existing tool that worked before.
The problem is not the dialog it is the area of the mousecaption.

viewtopic.php?f=3&t=31155&p=180185&hilit=colorpicker#p180185

Download :
http://www.pflegeplus.com/DOWNLOADS/TestPick2.zip

regards
Uwe

[ukoenig]

I tested some samples like zoomer2.prg with the same wrong results
The cursor must return the cursor area but returns something else.
Maybe < GetCursorPos() > does not work ?



From sample < zoomer2.prg >

FUNCTION getcolor(ownd,nzoom)

local hDeskTop := GetDC(0)
local a := GetCursorPos()
local nColor := GetPixel( hDeskTop, a[2], a[1] )
local hDC := oWnd:GetDC()
local nTop := 0
local nLeft := 0
local nWidth := 200
local nHeight := 200

StretchBlt( hDC, nLeft, nTop, nWidth, nHeight, hDeskTop, a[2]-(nWidth/(nZoom*2)), a[1]-(nHeight/(2*nZoom)), nWidth/nZoom, nHeight/nZoom, 13369376 )

oWnd:ReleaseDC()
ReleaseDC( 0, hDeskTop )
RETURN nil

result of sample < Zoomer.prg >
like You can see, the cursorposition is different



any idea ?

regards
Uwe

[Enrico Maria Giordano]

Can we see a reduced, yet complete, sample of the problem, please?

EMG

[ukoenig]

Enrico,

I used the original FWH-samples < zoomer.prg and zoomer2.prg > to show the results.

regards
Uwe

[Enrico Maria Giordano]

I just tried zoomer.prg and found it perfectly working.

EMG

[ukoenig]

Enrico,

maybe the problem is the selected screenresolution ?

regards
Uwe

[cnavarro]

Uwe
What resolution use?
What monitor ?

[ukoenig]

Cristobal,

I found the reason :
with the monitor it is possible to define a RESIZE-factor.
Normally 100 % is used ( tested and that works !!! )
Because to get a bigger display I used 125 %
THAT IS NOT SUPPORTED !

Monitor settings



regards
Uwe

[cnavarro]

Yes, I assumed it was that
It happened to me when I developed the menus

[ukoenig]

Cristobal,

do You think there is any solution
to respect this setting and adjust the returnvalues of < GetCursorPos() > ?

regards
Uwe

[cnavarro]

Cristobal,

do You think there is any solution
to respect this setting and adjust the returnvalues of < GetCursorPos() > ?

regards
Uwe

It's possible with DPI SCaling, but developing a function may be complicated to adjust

DPI Scaling Level
Value data
Smaller 100% (default) 96
Medium 125% 120
Larger 150% 144
Extra Large 200% 192
Custom 250% 240
Custom 300% 288
Custom 400% 384
Custom 500% 480

This value think is into register windows

[cnavarro]

I found this

HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics

But this is better

Code: Select all | Expand

#define LOGPIXELSX    88
#define LOGPIXELSY    90

Function GetLogPixels()

   local hDCM     := oMWnd:GetDC()
   ? GetDeviceCaps( hDCM, LOGPIXELSX ), GetDeviceCaps( hDCM, LOGPIXELSY )
   oMWnd:ReleaseDC()

Return nil


 

[cnavarro]

And for know zoom active

Code: Select all | Expand

#define LOGPIXELSX    88
#define LOGPIXELSY    90
#define ASPECTX                     40
#define ASPECTY                     42
#define ASPECTXY                    44

//----------------------------------------------------------------------------//

Function GetLogPixels()

   local hDCM     := oMWnd:GetDC()
   ? GetDeviceCaps( hDCM, LOGPIXELSX ), GetDeviceCaps( hDCM, LOGPIXELSY ), ;
     GetDeviceCaps( hDCM, ASPECTX ), GetDeviceCaps( hDCM, ASPECTY )
   ? GetScaleFactorForDevice( 0 )
   oMWnd:ReleaseDC()

Return nil

//----------------------------------------------------------------------------//

DLL32 FUNCTION GetScaleFactorForDevice( deviceType AS DWORD ) AS LONG PASCAL LIB "Shcore.dll"

//----------------------------------------------------------------------------//

 

And I do not know if this function performs the coordinate conversion correctly

Code: Select all | Expand

//----------------------------------------------------------------------------//

Function AdjustPos( aPoint )

   Local nZoom  := GetScaleFactorForDevice( 0 )
   Local nPorc  := nZoom / 96
   aPoint[ 1 ]  := Round( aPoint[ 1 ] / nPorc, 0 )
   aPoint[ 2 ]  := Round( aPoint[ 2 ] / nPorc, 0 )

Return aPoint

//----------------------------------------------------------------------------//