Lars Erdmann schrieb:

Am 14.09.15 20.11, schrieb Andi B.:

Hi,
how to get the current scroll position from a container?

I can get the current selected object with -

psrec = WinSendDlgItemMsg( hwnd, ulCnrId,
CM_QUERYRECORDEMPHASIS,
MPFROMLONG( CMA_FIRST),
MPFROMLONG( CRA_SELECTED));

but how can I query the scroll position (and set it again afterwards
when I filled it with refreshed objects)?

Thanks, Andi

The container control has a bunch of atomic children like the 2
scrollbars for horizontal and vertical scroll.
I think you will have to manipulate these:

hwndCnr = WinWindowFromID(hwnd,ulCnrId);
// the CID_ constants are the ids of all the children controls
hwndVertScroll = WinWindowFromID(hwndCnr,CID_VSCROLL);

// save old vertical scroll position
SHORT oldYPos = SHORT1FROMMR(WinSendWindowMsg(hwndVertScroll,SBM_QUERYPOS,MPVOID,MPVOID));

... do you stuff ...

// restore old vertical scroll position WinSendWindowMsg(hwndVertScroll,SBM_SETPOS,MPFROMSHORT(oldYPos),MPVOID);

I hope that that'll do.

Lars

Thank you very much for your input. Sounds reasonable. Will try it out.
But it will take time until I'm back to that topic. Don't worry when I
do not give immediate feedback :-)

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Lars Erdmann schrieb:

Am 14.09.15 20.11, schrieb Andi B.:

Hi,
how to get the current scroll position from a container?

I can get the current selected object with -

psrec = WinSendDlgItemMsg( hwnd, ulCnrId,
CM_QUERYRECORDEMPHASIS,
MPFROMLONG( CMA_FIRST),
MPFROMLONG( CRA_SELECTED));

but how can I query the scroll position (and set it again afterwards
when I filled it with refreshed objects)?

Thanks, Andi

The container control has a bunch of atomic children like the 2
scrollbars for horizontal and vertical scroll.
I think you will have to manipulate these:

hwndCnr = WinWindowFromID(hwnd,ulCnrId);
// the CID_ constants are the ids of all the children controls
hwndVertScroll = WinWindowFromID(hwndCnr,CID_VSCROLL);

// save old vertical scroll position
SHORT oldYPos = SHORT1FROMMR(WinSendWindowMsg(hwndVertScroll,SBM_QUERYPOS,MPVOID,MPVOID));

... do you stuff ...

// restore old vertical scroll position WinSendWindowMsg(hwndVertScroll,SBM_SETPOS,MPFROMSHORT(oldYPos),MPVOID);

I hope that that'll do.

Lars

Ok you pointed me in the right direction. Reading scroll position works
as you suggested. For setting back the container afterwards to the
original position I have to use -

// restore old vertical scroll position
WinSendDlgItemMsg( hwnd, ulCnrId,
CM_SCROLLWINDOW,
MPFROMSHORT( CMA_VERTICAL ),
MPFROMSHORT( oldYPos ));

Your code (slightly modified to WinSendMsg instead WinSendWindowMsg)
moves the slider only but not the content. Just in case anyone finds
these thread some times.

Thanks.

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Test

Andi B. schrieb:

Lars Erdmann schrieb:

Am 14.09.15 20.11, schrieb Andi B.:

Hi,
how to get the current scroll position from a container?

I can get the current selected object with -

psrec = WinSendDlgItemMsg( hwnd, ulCnrId,
CM_QUERYRECORDEMPHASIS,
MPFROMLONG( CMA_FIRST),
MPFROMLONG( CRA_SELECTED));

but how can I query the scroll position (and set it again afterwards
when I filled it with refreshed objects)?

Thanks, Andi

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On 05.10.15 20.57, Lars Erdmann wrote:

Test

Andi B. schrieb:

Lars Erdmann schrieb:

Am 14.09.15 20.11, schrieb Andi B.:

Hi,
how to get the current scroll position from a container?

I can get the current selected object with -

psrec = WinSendDlgItemMsg( hwnd, ulCnrId,
CM_QUERYRECORDEMPHASIS,
MPFROMLONG( CMA_FIRST),
MPFROMLONG( CRA_SELECTED));

but how can I query the scroll position (and set it again afterwards
when I filled it with refreshed objects)?

Thanks, Andi

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Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus

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