880410 - CtlColor
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hi i need an edit ctrl for entering numerical values. sometimes these values must lie in a specified range. otherwise, i want to warn the user by changing the edit-box color. i derived a class from CEdit for this purpose and tried to put the code in the CtlColor:
HBRUSH MyEdit::CtlColor(CDC* pDC, UINT nCtlColor)
{
if (d_chars==decimalChars) // if mode==emDecimal
{
CString s;
GetWindowText(s);
USES_CONVERSION;
int val=atoi(T2A(s));
if (val<d_minVal || val>d_maxVal)
{
pDC->SetTextColor(RED);
pDC->SetBkColor(YELLOW);
}
}
return NULL;
}i don't need to change the default brush used for painting the ctrl, so i return NULL. but this doesn't work. i tried returning a valid handle to a brush i created, but i could at most change the background color, not the text color. what's the problem? what's the best solution? thx
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hi i need an edit ctrl for entering numerical values. sometimes these values must lie in a specified range. otherwise, i want to warn the user by changing the edit-box color. i derived a class from CEdit for this purpose and tried to put the code in the CtlColor:
HBRUSH MyEdit::CtlColor(CDC* pDC, UINT nCtlColor)
{
if (d_chars==decimalChars) // if mode==emDecimal
{
CString s;
GetWindowText(s);
USES_CONVERSION;
int val=atoi(T2A(s));
if (val<d_minVal || val>d_maxVal)
{
pDC->SetTextColor(RED);
pDC->SetBkColor(YELLOW);
}
}
return NULL;
}i don't need to change the default brush used for painting the ctrl, so i return NULL. but this doesn't work. i tried returning a valid handle to a brush i created, but i could at most change the background color, not the text color. what's the problem? what's the best solution? thx
ilostmyid2 wrote:
derived a class from CEdit for this purpose
This is not correct.
WM_CTLCOLORis sent to the parent window. So you should be handlingOnCtlColorof the parent dialog. In that, check if the message is for your particular edit control and then dopDC->SetTextColor.«_Superman_» I love work. It gives me something to do between weekends.
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hi i need an edit ctrl for entering numerical values. sometimes these values must lie in a specified range. otherwise, i want to warn the user by changing the edit-box color. i derived a class from CEdit for this purpose and tried to put the code in the CtlColor:
HBRUSH MyEdit::CtlColor(CDC* pDC, UINT nCtlColor)
{
if (d_chars==decimalChars) // if mode==emDecimal
{
CString s;
GetWindowText(s);
USES_CONVERSION;
int val=atoi(T2A(s));
if (val<d_minVal || val>d_maxVal)
{
pDC->SetTextColor(RED);
pDC->SetBkColor(YELLOW);
}
}
return NULL;
}i don't need to change the default brush used for painting the ctrl, so i return NULL. but this doesn't work. i tried returning a valid handle to a brush i created, but i could at most change the background color, not the text color. what's the problem? what's the best solution? thx
MyEditBox::MyEditBox()
{
m_brush = NULL;
itemData = NULL;
}MyEditBox::~MyEditBox()
{
delete m_brush;
}BEGIN_MESSAGE_MAP(MyEditBox, CEdit)
//{{AFX_MSG_MAP(MyEditBox)
ON_WM_CTLCOLOR_REFLECT()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()bool MyEditBox::SetColorScheme(COLORREF brushColor, COLORREF bgTextColor, COLORREF fgTextColor)
{
delete m_brush;
m_brush = new CBrush(brushColor);
bgc = bgTextColor;
fgc = fgTextColor;
Invalidate();
UpdateWindow();
return (m_brush != NULL);
}void MyEditBox::ResetColorScheme()
{
delete m_brush;
m_brush = NULL;
Invalidate();
UpdateWindow();
}
/////////////////////////////////////////////////////////////////////////////
// MyEditBox message handlers
/////////////////////////////////////////////////////////////////////////////HBRUSH MyEditBox::CtlColor(CDC* pDC, UINT nCtlColor)
{
if (m_brush == NULL)
return NULL;
//note - if brush and text background color are different, anomalies will occur
pDC->SetTextColor(fgc);
pDC->SetBkColor(bgc);
return (HBRUSH)m_brush->GetSafeHandle();
}