Re: Window Region and Placement - C / C++ / MFC Discussion Boards

Dov Sherman17-Jul-02 0:08

17-Jul-02 0:08

I'm working on an application which has a CWnd descended window called CAnimateWnd.

CAnimateWnd uses SetWindowRgn(hClipRgn, TRUE) to change the shape of the window frequently. It then uses SetWindowPos() to change the location of the window.

Calling SetWindowRgn() with the second param (bRedraw) TRUE causes the window to be redrawn. Changing the position of the window with SetWindowPos() or MoveWindow() causes the window to be redrawn. However, since the new shape of the window may look wrong until the window is in its new position, I want the window to be redrawn only once.

If I call SetWindowRgn() with bRedraw as FALSE, the area beneath the window is filled back under the assumption of the new region shape rather than the old, leaving bits of the previous view behind.

Is there a way to set the window region and change the position in the same instant?

Re: Window Region and Placement

Joaquín M López Muñoz17-Jul-02 2:21

Joaquín M López Muñoz

17-Jul-02 2:21

Hide the window before setting the new region and show it back after repositioning it.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Window Region and Placement

Dov Sherman17-Jul-02 2:47

Dov Sherman

17-Jul-02 2:47

That works but it also makes the window flicker. Is there any other way to do it?

Re: Window Region and Placement

Joaquín M López Muñoz17-Jul-02 2:58

Joaquín M López Muñoz

17-Jul-02 2:58

Well, I haven't tried this, but it might help reduce the flickering. Before repositioning the window, save its original surrounding rectangle with GetWindowRect. After repositiong, invalidate the desktop window with InvalidateRect using the rectangle previously saved.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Window Region and Placement

Dov Sherman17-Jul-02 4:58

Dov Sherman

17-Jul-02 4:58

That'sa good idea. I tried it but it didn't seem to have any effect at all. Maybe I'm doing it wrong. Do you see any obvious problems with this code?

<br />
void CAnimateWnd::ChangeAppearanceAndPosition(HRGN hNewRgn, int iPosX, int iPosY)<br />
{<br />
CRect oldRect;<br />
GetWindowRect(&oldRect);<br />
<br />
SetWindowRgn(hNewRgn, FALSE); // change shape without redrawing<br />
SetWindowPos(&wndTopMost, iPosX, iPosY, 100, 100, SWP_NOACTIVATE);<br />
<br />
::InvalidateRect( GetDesktopWindow()->GetSafeHwnd(), &oldRect, TRUE);<br />
}<br />

Re: Window Region and Placement

Joaquín M López Muñoz17-Jul-02 5:09

Joaquín M López Muñoz

17-Jul-02 5:09

The code seems OK to me Frown | :(

There are a couple of things you might want to try:

Do a ScreenToClient of the rectangle for the desktop window prior to using it in InvalidateRect.
Force the repainting of the desktop window with UpdateWindow after invalidating.

Other than these, I cannot come out with any other possible reason for this failing.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Window Region and Placement

Dov Sherman17-Jul-02 5:47

Dov Sherman

17-Jul-02 5:47

I tried each of those but there was no change. My guess is that, since I did not repaint during my SetWindowRgn() call, the desktop thinks it is intended to leave the bits of previous regions behind.

If I have to I can live with the flicker but I'd much rather have a perfectly smooth animation display.

Re: Window Region and Placement

Joaquín M López Muñoz17-Jul-02 6:54

Joaquín M López Muñoz

17-Jul-02 6:54

What about this?

void CAnimateWnd::ChangeAppearanceAndPosition(HRGN hNewRgn, int iPosX, int iPosY)
{
CRgn oldRgn;
oldRgn.CreateRectRgn(0,0,0,0);
GetWindowRgn(oldRgn);
SetWindowRgn(hNewRgn, FALSE); // change shape without redrawing
GetDesktopWindow()->InvalidateRect(&oldRgn);
SetWindowPos(&wndTopMost, iPosX, iPosY, 100, 100, SWP_NOACTIVATE);
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Window Region and Placement

Dov Sherman17-Jul-02 7:10

Dov Sherman

17-Jul-02 7:10

Ah, you mean InvalidateRgn(), right? Hrmm... still no visible effect. I wonder if we're misinterpreting the expected behavior for the Desktop Window. Maybe it doesn't know how to update but, rather, is simply storing an image of the desktop in its current state, in which case that current state would include the broken bits of previous animation frames.

Re: Window Region and Placement

Joaquín M López Muñoz17-Jul-02 7:47

Joaquín M López Muñoz

17-Jul-02 7:47

Ummm. One more try:

void CAnimateWnd::ChangeAppearanceAndPosition(HRGN hNewRgn, int iPosX, int iPosY)
{
  CRgn oldRgn;
  oldRgn.CreateRectRgn(0,0,0,0);
  GetWindowRgn(oldRgn);
  SetWindowRgn(hNewRgn, FALSE); // change shape without edrawing
  InvalidateRect(&oldRgn);
  SetWindowPos(&wndTopMost, iPosX, iPosY, 100, 100, SWP_NOACTIVATE);
}

Would you care to tell me the result now?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Window Region and Placement

Dov Sherman17-Jul-02 8:24

Dov Sherman

17-Jul-02 8:24

Same as before. No visible change. Frown | :(

Re: Window Region and Placement

Dov Sherman19-Jul-02 2:17

Dov Sherman

19-Jul-02 2:17

I found a solution. For the curious, I will post it here:

The main problem is that the window needs to change its HRGN shape and its position at the same time. Since the new shape will not be correct until the window is in the new position, I needed the window to redrawn only when both the new HRGN and the new position have been set but I still needed to restore the background in areas of the old shape which were not part of the new shape.

<br />
void CAnimateWnd::UpdateRgnAndPos(HRGN hNewRgn, int iPosX, int iPosY)<br />
{<br />
HRGN hOldRgn = CreateRectRgn(0, 0, 0, 0); // make blank region<br />
GetWindowRgn(hOldRgn);<br />
<br />
HRGN hOffRgn = CreateRectRgn(0, 0, 0, 0); // make blank region<br />
CombineRgn(hOffRgn, hNewRgn, NULL, RGN_COPY); // make a copy<br />
OffsetRgn(hOffRgn, iPosX - m_iOldPosX, iPosY - m_iOldPosY); // compensate for later movment<br />
<br />
HRGN hCombinedRgn = CreateRectRgn(0, 0, 0, 0); // make blank region<br />
CombineRgn(hCombineRgn, hOffRgn, hOldRgn, RGN_OR); // combine region so that lost area gets deleted<br />
<br />
SetWindowRgn(hCombinedRgn, FALSE); // don't redraw yet<br />
<br />
SetWindowPos(iPosX, iPosY, 100, 100, SWP_NOACTIVATE); // change position<br />
<br />
SetWindowRgn(hNewRgn, TRUE); // redraw now so that lost areas of combined region are restored<br />
<br />
Invalidate(TRUE); // make it pretty<br />
<br />
m_iOldPosX = iPosX; // remember old position for next time<br />
m_iOldPosY = iPosY;<br />
}<br />

Re: Window Region and Placement

Philippe Mori17-Jul-02 3:10

Philippe Mori

17-Jul-02 3:10

Maybe you could uses 2 windows. You set the shape on the new window, show it (above the old), hide the old.

Or uses layered windows (see SetLayeredWindowAttributes) if you are using Windows 2000 or Windows XP. This allows to create transparent and semi-transparent windows.

Philippe Mori

CListCtrl OnKeyDown message.

Fred dB.16-Jul-02 23:28

Fred dB.

16-Jul-02 23:28

Hello,

I have problem with a CListCtrl. As you know, pushing up/bottom arrow allow you to move up and down through the elements of your list (it's builtin). Everything was perfect since yesterday Smile | :)

I noticed that the arrows didn't respond. A message (WM_KEYDOWN) seems to be blocked by something but i can't put the finger on it. Mouse events work perfectly.

I derived a class from CListCtrl and i put it in a form derived from CFormView. As i said,all was working perfectly two days ago. The problem seems to be simple, i do not use special or custom code to process messages. I think i respect the way to implement controls using MFC.

Any tips to locate simply (with VC debugger) where the problem is?

Thank u!

Fred

C++/MFC/SQL Developer.

Re: CListCtrl OnKeyDown message.

Scot Brennecke17-Jul-02 19:39

Scot Brennecke

17-Jul-02 19:39

I'm not sure what differences you have between now and two days ago, but it sounds like you're being bitten by IsDialogMessage. Certain keystrokes are trapped by the system and treated as dialog navigation keys, rather than being sent to the control. Besides direction keys, this also includes things like Tab. Try adding a handler for WM_GETDLGCODE to your control. Return DLGC_WANTARROWS.

Scot Brennecke
Software Developer
VC++ MVP

Re: CListCtrl OnKeyDown message.

Fred dB.17-Jul-02 21:06

Fred dB.

17-Jul-02 21:06

Thank you,
I try immediately.

Fred

Re: CListCtrl OnKeyDown message.

Fred dB.18-Jul-02 2:59

Fred dB.

18-Jul-02 2:59

Scot,

First,thank you to pay attention at my problem!.

I noticed, after you answered me, that any controls trough the application get messages (concerning keystrokes).
I implemented what you adviced me everywhere in my controls but never i entered in the fucntion OnGetDlgCode ...
afx_msg UINT OnGetDlgCode( );

ON_WM_CREATE()

UINT
Cxxx::OnGetDlgCode()
{
return Cxxx::OnGetDlgCode() | DLGC_WANTARROWS | DLGC_WANTTAB;
}

It's a very weird situation.

Anyway thanks for your help.

Frédéric.

Fred

C++/MFC/SQL developer

Help files...

Neha16-Jul-02 23:24

Neha

16-Jul-02 23:24

Hi,
I am writing a html help file for an application(which is similar to Adobe photoshop help files).I would like to know is there any microsoft standard guidelines for writing such help files?

Thanks
Asha

Re: Help files...

[James Pullicino]17-Jul-02 4:57

[James Pullicino]

17-Jul-02 4:57

I don't know of any. Can't you copy the MSDN formatting?

Drinking In The Sun
Forgot Password?

Customdraw ?

Brian van der Beek16-Jul-02 22:57

Brian van der Beek

16-Jul-02 22:57

I have a Composite Control with a list control drawn in my resource. I created my own CListCtrl derived class, which adds sorting of columns.
Now I want to do some custom drawing, but I cannot get this to work. Some how I do not receive the NM_CUSTOMDRAW message. I used ON_NOTIFY_REFLECT and also tried the OnNotify method to receive this message, but here I only got the message from the header, not from the list itself.
How can I receive this message ? Must I do something else with the message map?

By the way, I used m_mylist.SubclassWindow(GetDlgItem(IDC_LIST)) to link the list control object to the list control.

CSocket, CArchive connect to java server?

Anonymous16-Jul-02 22:36

Anonymous

16-Jul-02 22:36

hi all,
pls try answer my question!

i want to know how can i send data to java server in client/server program?
since the server is not written in java which do not use CArchive to receive data, i found there is some strange data sent to the java side server if i use the CArchive in the mfc client application.

do you know how can i send a pure data to other server or receive data from server if i don't use CArchive. Or, how can send data to non-MFC application in client/server program in a MFC application using CSocket, CSocketFile and CArchive?

thanks,
jim

Re: CSocket, CArchive connect to java server?

Brian Azzopardi16-Jul-02 23:27

Brian Azzopardi

16-Jul-02 23:27

Screw the MFC socket class and use the Win32 api directly. Its easy. CArchive & co are meant for when there are other MFC apps on the other end.

Beware of byte ordering issues.

BTW, wouldn't it be better to use java on the client and C in the server. I was thinking of the performance implications, unless the server will only have, at most, a handful of clients.

bibamus, edamus, cras moriemur

[eat, drink, for tomorrow we die]

"Installing" ISAPI

Hans Ruck16-Jul-02 22:09

Hans Ruck

16-Jul-02 22:09

I've created an ISAPI module and i want to write an installation kit.
Is it possible to create virtual directories on IIS working just in command line style?

rechi

Access denied when trying to access IE documents in frames, in which loaded docs from different domains

Alex Cramer16-Jul-02 21:19

Alex Cramer

16-Jul-02 21:19

I'm hosting Web Browser in my app. When document contains frames with pages from different domains, it causes acces denied (COM Error) when trying to access document in frame. How to avoid it??
I read MSDN article "Permission Denied Error Message When Scripting Across Frames", but there was written about scripts only...

Help me ..Doubts on VC++ DhtmlEdit Controll for IE5[Table insert,Paste html...]

Ranjith.e.Nair16-Jul-02 20:44

Ranjith.e.Nair

16-Jul-02 20:44

Help me to clear doubts on VC++ DhtmlEdit Controll for IE5[Table insert,Paste html...]

I am trying to develop a html editor using vc++6.

Now I am facing five major problems

1 How add Toolbar in a Dialog Based Application using vc+6 ? ,Is it possible in Dialog Based Application ?.

2 How insert a Table in a html page using vc+6's DHTML EDIT Control for IE5 ?.

3 How implement PasteHtml using vc+6's DHTML EDIT Control for IE5 ?.

4 How insert an adjecent Html?

5 How devolop a file opening dialog with html preview ?

The following shows my code for each problem ...

** Problem 2: VB code OK:-

Dim s As New DHTMLEDLibCtl.DEInsertTableParam
s.Caption = "test"
s.NumCols = "2"
s.NumRows = "2"
s.TableAttrs = "border=20"
s.CellAttrs = "bgcolor=black"
DHTMLEdit1.ExecCommand DECMD_INSERTTABLE, OLECMDEXECOPT_PROMPTUSER, s
** How it solve in VC++6 ?
----------------------------------------------
** Problem 3: VB code OK:-

Private Sub btnInsertNewTag_Click()
'insert new tag at cursor position
Dim tr As Object
Set tr = DHTMLEdit1.DOM.selection.createRange
tr.pasteHTML "

"
End Sub
** How it solve in VC++6 ?

----------------------------------------------
** Problem 4: VB6 code Error:-

DHTMLEdit1.DOM.body.insertAdjacentHTML "body", "hr"

** Problem 4: VC++6 code Error:-

// It is not proper working.
LPCTSTR lpStrWhere= "body";
LPCTSTR lpStrHtml= "hr";
m_ctrlDhtml.GetDom().GetBody().insertHTML(lpStrWhere,lpStrHtml);//error
----------------------------------------------

If you know any methods to solve any of these problem ,you please send the source code or web site address.

Anticipating your early reply

Regards
ranjithe2002@hotmail.com Roll eyes | :rolleyes:

Thanks..
mail me
ranjithe2002@hotmail.com

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