Is there any way to copy DC of main dialog

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I have three dialogs say x,y and z in my application. On x dialog which is my main window, I am displaying some graphics using its OnPaint() function . Also I have placed a button 'b1' on 'x' . On click of b1, dialog 'y' pops up which have a 'preview button' on it .I want that clicking on 'preview' button opens dialog window 'z' with the same graphics that dialog 'x' has . For doing so, I have copied DC of x to DC of z using bitblt. But on 'z' , its showing the opened dialog windows y and z aswell mixing up with graphs of dialog 'x' .But I want only the graphs of my window x, no preview of opened dialog windows 'y' and 'z'. Is there any way to copy DC of my main dialog .

Posted 17-Feb-10 19:16pm

chandan_k

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13 solutions

Solution 1

Assumed your z has a pointer to x and there is a function:

void x::OnDraw(CDC* pDC)
{
...
}

Now you coul call it form your

void x::OnPaint()
{
  CPaintDC dc(this);
  OnDraw(&dc)
}

...as well from your

void z::OnPaint()
{
  CPaintDC dc(this);
  px->OnDraw(&dc)
}

It would be a solution without any copying of DC... :)

Posted 17-Feb-10 19:43pm

Eugen Podsypalnikov

Solution 2

As an alternative solution
you could provide an additional constructor of x:

x::x(const x& original, bool bHideB1 = true)
{
  // copy the members here...
...
  // and set a new member
  m_bHideB1 = bHideB1;
}

... and extend your

BOOL x::OnInitDialog()
{
...
  if (m_bHideB1) {
    CWnd* pcWnd = GetDlgItem(IDC_BUTTON1);
    if (pcWnd) {
      pcWnd->ShowWindow(SW_HIDE);
    }
  }
...
}

Now you could modify your "preview" reaction:

void y::OnPreview()
{
  x anotherX(*px); // here px is pointer to parent x dialog
  anotherX.DoModal();
}

It would be a solution without the class z... :)

Posted 17-Feb-10 20:00pm

Eugen Podsypalnikov

Solution 3

Hi Eugen,

Thanks for the reply.But I would like to say that Answer1 suggested by you is giving some unhandled exception .And Answer2 will not suit as per my requirement coz I have different tool bars and buttons in my 'x' dialog window that I don't want to show in my preview :(

Posted 17-Feb-10 20:22pm

chandan_k

Solution 4

Hi Chandan,
could you post your debug stack at the exception, please ? :)

When not - you could call x::OnDraw(..) -
for a compatible memory DC for z
and then copy it to the DC of z... :)

Posted 17-Feb-10 20:33pm

Eugen Podsypalnikov

Updated 17-Feb-10 20:37pm

v2

Solution 5

VB

CGraphChoosePreview::OnPaint() line 156 + 7 bytes
CWnd::OnWndMsg(unsigned int 15, unsigned int 0, long 0, long * 0x0303e500) line 1825
CWnd::WindowProc(unsigned int 15, unsigned int 0, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x0303e828 {CGraphChoosePreview hWnd=0x004d05ea}, HWND__ * 0x004d05ea, unsigned int 15, unsigned int 0, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x004d05ea, unsigned int 15, unsigned int 0, long 0) line 368
AfxWndProcBase(HWND__ * 0x004d05ea, unsigned int 15, unsigned int 0, long 0) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e428ea0()
USER32! 7e428eec()
NTDLL! 7c90e473()
CWnd::UpdateWindow() line 118 + 63 bytes
CWnd::RunModalLoop(unsigned long 4) line 3455
CDialog::DoModal() line 536 + 12 bytes
CGraphChoice::OnGraphPreview() line 1011
_AfxDispatchCmdMsg(CCmdTarget * 0x0303f298 {CGraphChoice hWnd=0x002103fa}, unsigned int 2294, int 0, void (void)* 0x00408b52 CGraphChoice::OnGraphPreview(void), void * 0x00000000, unsigned int 12, AFX_CMDHANDLERINFO * 0x00000000) line 88
CCmdTarget::OnCmdMsg(unsigned int 2294, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 302 + 39 bytes
CDialog::OnCmdMsg(unsigned int 2294, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 97 + 24 bytes
CWnd::OnCommand(unsigned int 2294, long 7276046) line 2088
CWnd::OnWndMsg(unsigned int 273, unsigned int 2294, long 7276046, long * 0x0303eadc) line 1597 + 28 bytes
CWnd::WindowProc(unsigned int 273, unsigned int 2294, long 7276046) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x0303f298 {CGraphChoice hWnd=0x002103fa}, HWND__ * 0x002103fa, unsigned int 273, unsigned int 2294, long 7276046) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x002103fa, unsigned int 273, unsigned int 2294, long 7276046) line 368
AfxWndProcBase(HWND__ * 0x002103fa, unsigned int 273, unsigned int 2294, long 7276046) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42927b()
USER32! 7e4292e3()
USER32! 7e44ff7d()
USER32! 7e4465d2()
USER32! 7e425e94()
USER32! 7e43b082()
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42a013()
USER32! 7e42a998()
CWnd::DefWindowProcA(unsigned int 514, unsigned int 0, long 2162747) line 1000 + 32 bytes
CWnd::WindowProc(unsigned int 514, unsigned int 0, long 2162747) line 1586 + 26 bytes
AfxCallWndProc(CWnd * 0x0303f2f8 {CButton hWnd=0x006f060e}, HWND__ * 0x006f060e, unsigned int 514, unsigned int 0, long 2162747) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x006f060e, unsigned int 514, unsigned int 0, long 2162747) line 368
AfxWndProcBase(HWND__ * 0x006f060e, unsigned int 514, unsigned int 0, long 2162747) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e4189cd()
USER32! 7e418a10()
USER32! 7e4274ff()
USER32! 7e43c6d3()
CWnd::IsDialogMessageA(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 182
CWnd::PreTranslateInput(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 3424
CDialog::PreTranslateMessage(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 92
CWnd::WalkPreTranslateTree(HWND__ * 0x003103e4, tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 2667 + 18 bytes
CWinThread::PreTranslateMessage(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 665 + 18 bytes
CWinThread::PumpMessage() line 841 + 30 bytes
CWnd::RunModalLoop(unsigned long 4) line 3478 + 19 bytes
CDialog::DoModal() line 536 + 12 bytes
CPipeImView::ChooseGraphs() line 3095 + 11 bytes
CPipeImView::OnViewCalMainMenu() line 14423
_AfxDispatchCmdMsg(CCmdTarget * 0x003f7b60 {CPipeImView hWnd=0x004903d8}, unsigned int 33341, int 0, void (void)* 0x0040b5be CPipeImView::OnViewCalMainMenu(void), void * 0x00000000, unsigned int 12, AFX_CMDHANDLERINFO * 0x00000000) line 88
CCmdTarget::OnCmdMsg(unsigned int 33341, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 302 + 39 bytes
CView::OnCmdMsg(unsigned int 33341, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 159 + 24 bytes
CPipeImView::OnCmdMsg(unsigned int 33341, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 6815
CFrameWnd::OnCmdMsg(unsigned int 33341, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 890 + 33 bytes
CMainFrame::OnCmdMsg(unsigned int 33341, int 0, void * 0x00000000, AFX_CMDHANDLERINFO * 0x00000000) line 1009 + 24 bytes
CWnd::OnCommand(unsigned int 33341, long 5047758) line 2088
CFrameWnd::OnCommand(unsigned int 33341, long 5047758) line 317
CWnd::OnWndMsg(unsigned int 273, unsigned int 33341, long 5047758, long * 0x0303f7c8) line 1597 + 28 bytes
CWnd::WindowProc(unsigned int 273, unsigned int 33341, long 5047758) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x003f6f08 {CMainFrame hWnd=0x003103e4}, HWND__ * 0x003103e4, unsigned int 273, unsigned int 33341, long 5047758) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x003103e4, unsigned int 273, unsigned int 33341, long 5047758) line 368
AfxWndProcBase(HWND__ * 0x003103e4, unsigned int 273, unsigned int 33341, long 5047758) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42927b()
USER32! 7e4292e3()
COMCTL32! 5d0cb72d()
COMCTL32! 5d09f7d9()
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42a013()
USER32! 7e42a998()
CWnd::DefWindowProcA(unsigned int 514, unsigned int 0, long 851984) line 1000 + 32 bytes
CWnd::WindowProc(unsigned int 514, unsigned int 0, long 851984) line 1586 + 26 bytes
CControlBar::WindowProc(unsigned int 514, unsigned int 0, long 851984) line 470 + 20 bytes
AfxCallWndProc(CWnd * 0x003f73dc {CToolBar hWnd=0x004d05ce}, HWND__ * 0x004d05ce, unsigned int 514, unsigned int 0, long 851984) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x004d05ce, unsigned int 514, unsigned int 0, long 851984) line 368
AfxWndProcBase(HWND__ * 0x004d05ce, unsigned int 514, unsigned int 0, long 851984) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e4189cd()
USER32! 7e418a10()
USER32! 7e4274ff()
USER32! 7e43c6d3()
CWnd::IsDialogMessageA(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 182
CWnd::PreTranslateInput(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 3424
CControlBar::PreTranslateMessage(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 424
CWnd::WalkPreTranslateTree(HWND__ * 0x003103e4, tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 2667 + 18 bytes
CWinThread::PreTranslateMessage(tagMSG * 0x00dd8108 {msg=0x00000113 wp=0x00001000 lp=0x00000000}) line 665 + 18 bytes
CWinThread::PumpMessage() line 841 + 30 bytes
CWinThread::Run() line 480 + 11 bytes
CWinApp::Run() line 400
AfxWinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00041f2a, int 1) line 49 + 11 bytes
WinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00041f2a, int 1) line 30
WinMainCRTStartup() line 330 + 54 bytes
KERNEL32! 7c817077()

Posted 17-Feb-10 20:38pm

chandan_k

Solution 6

May be your pointer of x was not set correctly ? :)

What line does generate the exception ?

Is it px->OnDrraw(..);

You could set a breakpoint and observe the px by debugging :)

...or (assumed you construct your dialogs with passing of the parent(this))
you could try also the following test :) :

void z::OnPaint()
{
  CPaintDC dc(this);

  CWnd* pcWnd = GetParent();
  if (pcWnd) {
    x* pcX = (x*) pcWnd->GetParent();
    if (pcX) {
      pcX->OnDraw(&dc);
    }
  }
}

Posted 17-Feb-10 20:43pm

Eugen Podsypalnikov

Updated 17-Feb-10 21:10pm

v3

Solution 7

yah, at

px->OnDraw(..);

only ,its throwing exception.I tried by setting breakpoint ,but its not going under OnDraw() function. :(

Posted 17-Feb-10 20:58pm

chandan_k

Updated 17-Feb-10 20:59pm

v2

Solution 8

Could you describe the transfer of px in to the z::OnPaint() please ?

Posted 17-Feb-10 21:08pm

Eugen Podsypalnikov

Updated 17-Feb-10 21:09pm

v2

Solution 9

CWnd* pcWnd = GetParent();  
    if (pcWnd) 
    {    
        x* pcX = (x*) pcWnd->GetParent(); 
        if (pcX) 
        {      
            pcX->OnDraw(&dc);
        }

    }

I tried this too.But no luck.. Graph's preview is not coming. Window 'z'is visible blank.

Posted 17-Feb-10 21:18pm

chandan_k

Updated 17-Feb-10 21:32pm

v3

Solution 11

still blank window is coming with no graphs :(

Posted 17-Feb-10 21:59pm

chandan_k

Solution 13

It worked.Thank U very much :) :) :) :) :-D

Posted 17-Feb-10 23:39pm

chandan_k

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Eugen Podsypalnikov · Accepted Answer · 2010-02-17T22:13:00

Solution 12

It would be a result,
if your m_pcX is not set... :)

Please post
your lines of constructing (instancing) of y and z :)

Posted 17-Feb-10 22:13pm

Eugen Podsypalnikov

Eugen Podsypalnikov · Accepted Answer · 2010-02-17T21:35:00

:)

No, so it can not go... :)

Please follow the insructions:

void x::OnSettings()
{
  y myY(this);
  myY.DoModal();
}

void y::OnPreview()
{
  z myZ(this);
  myZ.DoModal();
}

z::z(CWnd* pcParent)
: CDialog(IDD_z, pcParent)
{
  m_pcX = NULL; // please declare the new member in the header: x* m_pcX !
  if (pcParent) {
    m_pcX = (x*) pcParent->GetParent();
  }
}

void z::OnPaint()
{
  CPaintDC dc(this);

  if (m_pcX) {
    m_pcX->OnDraw(&dc);
  }
}

Good luck :)

Is there any way to copy DC of main dialog

13 solutions

Solution 12

Solution 1

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8

Solution 9

Solution 10

Solution 11

Solution 13

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