error C2065: 'CTLCOLOR_DLG' : undeclared identifier
warning C4018: '==' : signed/unsigned mismatch
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Question
Can I change the colour of a CDialog and CFormView?
Can I change the (bkgd) colour of a CDialog and CFormView? If so, how?
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Answers
in your dialog class declaration
CBitmap m_bg;
in your dialog constructor:
m_bg.CreateSolidBrush(RGB(
Add OnCtrlColor handler:
HBRUSH CYourDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
if (!m_bg.GetSafeHandle())
return hbr;
switch (nCtlColor) {
//Edit controls need white background and black text
//Note the 'return hbr' which is needed to draw the Edit
//control's internal background (as opposed to text background)
case CTLCOLOR_EDIT:
pDC->SetTextColor(RGB(0,0,
pDC->SetBkColor(RGB(255,25
return hbr;
//Static controls need black text and same background as m_brush
case CTLCOLOR_STATIC:
LOGBRUSH logbrush;
fondo.GetLogBrush( &logbrush );
pDC->SetTextColor(RGB(0,0,
pDC->SetBkColor(logbrush.l
return m_bg;
// change background for some controls
case CTLCOLOR_LISTBOX:
case CTLCOLOR_SCROLLBAR:
case CTLCOLOR_BTN:
case CTLCOLOR_MSGBOX:
// change background for dialog itself
case CTLCOLOR_DLG:
return m_bg;
default:
return m_bg;
}
}
>CBitmap m_bg;
Should this be CBrush? If so, I had changed it...
few errors>>
error C2065: 'fondo' : undeclared identifier
error C2228: left of '.GetLogBrush' must have class/struct/union type
error C2065: 'CTLCOLOR_SCROLLBAR' : undeclared identifier
error C2051: case expression not constant
error C2065: 'CTLCOLOR_DLG' : undeclared identifier
error C2051: case expression not constant
>fondo.GetLogBrush( &logbrush );
Should fondo be m_bg?
For a CFormview just handle the WM_ERASEBKGND message in the view class - OnEraseBkhgnd(CDC* pDC).
Here you get the DC of the view window. You can then draw anything you want in this window. For example - if you wanted to have a gradient background:
BOOL CMyView::OnEraseBkgnd(CDC*
{
CView::OnEraseBkgnd(pDC);
Brush pBrush[64]; // use 64 shades of cyan
CRect rect,rectWnd;
// Create brushes
for( int i = 0; i < 64; i++ )
pBrush[i].CreateSolidBrush
CWnd* pWnd = pDC->GetWindow();
pWnd->GetClientRect(&rectW
int nWidth = rectWnd.right;
int nHeight = rectWnd.bottom;
// Paint screen
for( i=0; i < nHeight; i++ )
{
SetRect( &rect, 0, i, nWidth, i + 1);
pDC->FillRect( &rect, &pBrush[ ( i * 63 ) / nHeight ] );
}
// release brushes to Windows
for( i = 0; i < 64; i++ )
DeleteObject( pBrush[i] );
return TRUE;
}
Jim
void CGuiderView::OnDraw(CDC* pDC)
{
CGuiderDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
CStatic myStatic;
CRect rect;
GetClientRect(&rect);
int nX = rect.left;
int nY = rect.top;
myStatic.Create(NULL, WS_CHILD|WS_VISIBLE|SS_CEN
CRect(0,0,nX,nY), this);
CBrush bb(RGB(255,127,127));
pDC->FillRect( &rect, &bb);
myStatic.Invalidate() ;
}
And I manage to change the background colour of my view. But the problem is, the background of my button and static control did not change.
What should I do?
mwcmp,
The pDC is the DC of your view - the controls are not affected.
To change the color of a static you need to handle the WM_CTLCOLOR message. You return an HBRUSH from the call. But in there you can check the id of the control and change its background. Here is some code:
HBRUSH CMyDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
switch (nCtlColor)
{
case CTLCOLOR_STATIC:
switch (pWnd->GetDlgCtrlID())
{
case IDC_WELCOMETEXT:
SetStaticFont( pWnd, 6 );
pDC->SetTextColor(RGB(0, 0, 255));
break;
default:
break;
}
break;
default:
break;
}
// TODO: Return a different brush if the default is not desired
return hbr;
}
This should do the trick.
Jim
What if I had used the code that you had posted, but only that it is in the OnDraw()
void CGuiderView::OnDraw(CDC* pDC)
{
//CGuiderDoc* pDoc = GetDocument();
//ASSERT_VALID(pDoc);
CBrush pBrush[64]; // use 64 shades of cyan
for( int i = 0; i < 64; i++ )
pBrush[i].CreateSolidBrush
CRect rect,rectWnd;
int nWidth, nHeight;
GetClientRect(&rectWnd);
nWidth = rectWnd.right;
nHeight = rectWnd.bottom;
for( i=0; i < nHeight; i++ )
{
SetRect( &rect, 0, i, nWidth, i + 1);
pDC->FillRect( &rect, &pBrush[ ( i * 63 ) / nHeight ] );
}
for( i = 0; i < 64; i++ )
DeleteObject( pBrush[i] );
}
for this, I cannot set them to gradient colour too, am I right?
the method that you had suggeted only change the colour of the controls into a single colour. Am I right?
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by: migelPosted on 2004-08-10 at 12:06:03ID: 11766453
Hi!
You can handle WM_CTLCOLORDLG in the your dialog class
for example:
// m_BackBrush is the CBrush object member of the your class (NOTE it must be created in the construxtor or OnInitDialog methods)
HBRUSH CColoredDlg::OnCtlColor(CD
{
// Call the base class implementation first! Otherwise, it may
// undo what we're trying to accomplish here.
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
if (nCtlColor == CTLCOLOR_DLG || CTLCOLOR_STATIC == nCtlColor)
return (HBRUSH)m_BackBrush;
return hbr;
}