CDialog

[User 3037427]

How can i change the dialog box background color dynamically.:confused:

[Hamid Taebi]

you ca use WM_CTLCOLORor WM_PAINT_**

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whitesky

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[User 3037427]

But i want to chage the background depending on the color specified dynamically. I am getting an exception when i post the WM_CTLCOLOR message . Thanks for ur reply,

[Hamid Taebi]

i guess you getting exception because use a brush,yes? see here maybe it is some helpful to you void CAnswerDlg::OnPaint() { CPaintDC dc(this); // device context for painting dc.FillSolidRect(0,0,GetSystemMetrics (SM_CXSCREEN),GetSystemMetrics (SM_CYSCREEN), RGB(53,97,200)); } -------------- HBRUSH CAnswerDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) { HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor); return (HBRUSH)GetStockObject(WHITE_BRUSH); }_**

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whitesky

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[NiceNaidu fo]

Try this CRect rc; GetClientRect(&rc); // // Paint the client in the specified background color // pDC->FillSolidRect(&rc, m_clrBack); Appu.. "If you judge people, you have no time to love them."

[NiceNaidu fo]

Hey Sruthi, Chk this.This contains everything. http://www.nntu.sci-nnov.ru/DISLRN/cpppage/q117778.htm[^] Appu.. "If you judge people, you have no time to love them."

[User 3037427]

The code was working fine. But the controls like edit box etc.. are not visible bcoz of FillSolidRect(). How can i solve this problem :)

[Hamid Taebi]

Are you sure i test your problem but these are visible i used this code (editbox,button,radio,..)are visible COLORREF Color; Color=GetDC()->GetBkColor(); .... .... void CAnswerDlg::OnPaint() { CPaintDC dc(this); // device context for painting dc.FillSolidRect(0,0,GetSystemMetrics (SM_CXSCREEN),GetSystemMetrics (SM_CYSCREEN), Color); } void CAnswerDlg::OnBnClickedButton1() { Color=RGB(53,97,200); Invalidate(); }_**

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whitesky

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[Viorel]

I think the appropriate place to change the background colour of your dialog box is the handler for WM_ERASEBKGND notification. You can put here just two lines:

BOOL CMyDlg::OnEraseBkgnd(CDC* pDC)
{
	pDC->FillRect(CRect(0,0,32000,32000), &CBrush(RGB(0,0,255))); // blue
	return TRUE;
}

If you need to vary the colour (or just to optimize the solution), make a CBrush member variable and use CreateSolidBrush to set the colour. You can use CreatePatternBrush or CreateHatchBrush to have another kind of background. -- modified at 3:13 Friday 16th June, 2006

[Naveen]

one way HBRUSH MYDialog::OnCtlColor( CDC* pDC_i, CWnd* pWnd_i, UINT uCtlColor_i ) { HBRUSH hDefaultBrush = CDialog::OnCtlColor( pDC_i, pWnd_i, uCtlColor_i ); if( CTLCOLOR_DLG == uCtlColor_i ) { // Return a black brush so that the background become balck return reinterpret_cast(GetStockObject( BLACK_BRUSH )); } return hDefaultBrush; } Another way from the InitInstance of the App class u may call SetDialogBkColor( RGB(255,0,0) ) nave

[User 3037427]

But the background color is not changing. Here is my code: OnPaint() { ............. CSliderApp* app=(CSliderApp*)AfxGetApp(); app->ChangeDialogColor((COLORREF)m_clr.GetPos()); } void CSliderApp::ChangeDialogColor(COLORREF ref) { SetDialogBkColor(ref); } Is there anything wrong:confused:

[Hamid Taebi]

what error you have previous error can you show your code that how to use to change background color_**

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whitesky

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[Viorel]

If you are using VS 2003 or VS 2005, you will found that the definition of SetDialogBkColor function in afxwin2.inl file is:

_AFXWIN_INLINE void CWinApp::SetDialogBkColor(COLORREF /*clrCtlBk*/, COLORREF /*clrCtlText*/)
{
}

Therefore it does nothing. Documentation says that it is obsolete. You should consider other solutions.

[Eytukan]

Though you could do it by these ways, HandlingWM_ERASEBKGND is the right one for it.

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--[:jig:]-- [My Current Status]

[Naveen]

ok... i Understood instead of calling the ChangeDialogColor from onPaint call this Function as the first line of OnCtlColor funtion nave

[Hamid Taebi]

but i want to know why he cant show controls its attract for me to find answer for this question (of course i need to see his code that how to use)_**

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whitesky

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[User 3037427]

No its not working. Thanks for ur reply.:)

[Naveen]

ok another way... forgot every thing done before...Now do as below 1. Create a member variable of CBrush say m_BkBrush 2. Write Function like this ChangeColor( COLORREF clr_i ) { if( m_BkBrush.m_hObject ) m_BkBrush.DeleteObject(); m_BkBrush.CreateSolidBrush( clr_i ) Invalidate(); } 3. Call this function in the OnInitDialog and where ever u want to change the color 4. now overide the WM_CTLCOLOR message and inside that write as below HBRUSH MYDialog::OnCtlColor( CDC* pDC_i, CWnd* pWnd_i, UINT uCtlColor_i ) { HBRUSH hDefaultBrush = CDialog::OnCtlColor( pDC_i, pWnd_i, uCtlColor_i ); if( CTLCOLOR_DLG == uCtlColor_i ) { return m_BkBrush; } return hDefaultBrush; } try and tell me the result..;) nave

[User 3037427]

Sorry, its not working.:(

[Naveen]

ok yaar..I cannot figure out why its not working.... Well...Where r u working..? I am from India->Kerala.. nave