|
Hi,
It is generally not recommended to draw outside of the WM_PAINT/WM_ERASEBKGND handlers. When you draw outside of WM_PAINT you need to invalidate the window rectangle/region so that the subsystem knows to redraw it.
InvalidateRect function[^]
InvalidateRgn function[^]
Best Wishes,
-David Delaune
|
|
|
|
|
I wonder if WM_PAINT message handler could display messages immediately.
or even I draw it in a member function, it would refresh in OnPaint() executed?
|
|
|
|
|
econy wrote:
I wonder if WM_PAINT message handler could display messages immediately.
or even I draw it in a member function, it would refresh in OnPaint() executed?
No. There is no guarantee that when your WM_PAINT message fires that the subsystem will redraw window contents unless the rectangle/region/window is marked invalid. This is an OS optimization to prevent excessive redrawing. (However with DWM enabled[^] the rules do change a bit)
Read all of this so that in the future you can help others: Painting and Drawing[^]
Best Wishes,
-David Delaune
|
|
|
|
|
|
I am confused with SetFont() function.
I followed example code in MSDN, it works well in my laptop.
but, when I same code in my WinCE program, it dont work, font not change, show [] [] [] []
LOGFONT lf; CEdit *pEdit1;
lf.lfHeight = 12;
lf.lfWidth = 0;
memset(&lf, 0, sizeof(LOGFONT)); WCHAR lffn[] = TEXT("Simsun(OpenType)");
wcscpy(lf.lfFaceName,lffn);
lf.lfCharSet = GB2312_CHARSET;
if (m_font2.m_hObject) {
m_font2.DeleteObject();
}
m_font2.CreateFontIndirect(&lf);
pEdit1 = (CEdit *) GetDlgItem( IDC_EDIT1 );
pEdit1->SetFont(&m_font2);
SetDlgItemText(IDC_EDIT1, _T("公里") );
Appreciate any suggestions
|
|
|
|
|
Hi,
The code you pasted here appears to be bugged:
pEdit1 = (CEdit *) GetDlgItem( IDC_EDIT1 );
SetDlgItemText(IDC_INFO_PL, _T("公里") );
Best Wishes,
-David Delaune
|
|
|
|
|
Changed. it is solved, but I don't know the reason. please refer to another question I posted.
|
|
|
|
|
Hi, in a dialog project member function, the results of retGetRect() confused me:
void CTestDlg::RefreshLabels(void)
{
CRect rect;
CEdit1 *pEdit1 = GetDlgItem(IDC_EDIT_TST1);
pEdit1->GetRect(&rect);
}
with breakpoint, I got
[tagRECT] = {top=350682312 bottom=15026448 left=15026448 right=784660}
|
|
|
|
|
Solved, it need to use GetClientRect(); then ClientToScreen()
|
|
|
|
|
Hi everybody!
I'm creating a program which use database.
My problem is: I use ExecuteSQl() to input data into my database but when i run it, I show an error "too few parameters. Expected 1".
CString path(_T("\',\'")), pathInt(_T("','"), rien(_T("NUL"));
reqPer = _T("insert into personne values (2014,\'") + nomPer + path + prenPer + path + datNaissPer + path + liNaisPer + path + domPer + _T("\',") + rien + _T(",\'") + numPiecPer + path + _T('M') + path + profPer + path + natPer + _T("\',") + rien + pathInt + rien + _T(")");
database.ExecuteSQL(reqPer);
|
|
|
|
|
You should check the final value of the reqPer string to see whether the SQL command is correctly formed. I would also strongly suggest you do not create SQL statements in the way you have done, as this leaves your code open to SQL injection, and the potential loss or corruption of your database. See the CRecordSet class[^] for the correct way to do it.
|
|
|
|
|
I saw it, but it's not very clear for me. Please, can you post a sample?!
|
|
|
|
|
Fawaz Ajani wrote: Please, can you post a sample?
Sorry, I don't have one. You need to either search for yourself, or spend time reading the documentation.
|
|
|
|
|
It will be correct, if i use this one?
sql.Format("INSERT INTO NomTable (Colone1,Colonn2, ....) VALUES(%d ,'%s','%s', ....)",m_Variable1,m_Variable2, ....);
db->ExecuteSQL(sql);
|
|
|
|
|
This article does not do any writing or updating, but it may help to point you in the right direction.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
|
|
|
|
|
|
Please, I have order problem.
when I do this:
CRecordset recordset(&database);
CString temp, query;
query.Format(L"SELECT number FROM personne WHERE numPiece = '%s'", numPiecPer);
recordset.Open(CRecordset::snapshot, query, CRecordset::appendOnly);
while (!recordset.IsEOF())
{
recordset.GetFieldValue((short)0, temp);
messageBox(temp, 0, 0);
recordset.MoveNext();
}
It don't work. 
|
|
|
|
|
if a window be hidden,then does it still get messages from windows?
i.e, it's message loop still get/dispatch messages?
|
|
|
|
|
Yes, to both.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
|
|
|
|
|
As already stated by the other user, yes. This is actually a common trick people use for getting a message pump wherever they need one, make an invisible window that can be messaged to.
|
|
|
|
|
Hi, I want to change several CEdit's font in a dialog based program. the dialog is a non-modal dialog,in it's OnInitDialog().
BOOL CTestFontDlg::OnInitDialog()
{
CFont * pFontNew;
LOGFONT lf; CEdit *pEdit1;
CEdit *pEdit2;
CEdit *pEdit3;
CDialog::OnInitDialog();
pApp = (CTestFont*) AfxGetApp();
AddFontResource(TEXT("\\FlashDisk\\Startup\\Simsun.ttc"));
if ( pApp->g_Settings.language == LNG_CHINESE ) {
lf.lfHeight = 12;
lf.lfWidth = 0;
memset(&lf, 0, sizeof(LOGFONT)); WCHAR lffn[] = TEXT("Simsun(OpenType)");
wcscpy(lf.lfFaceName,lffn);
lf.lfCharSet = GB2312_CHARSET;
pFontNew->CreateFontIndirect(&lf);
pEdit1 = (CEdit *) GetDlgItem( IDC_INFO_PL );
pEdit2 = (CEdit *) GetDlgItem( IDC_INFO_PRESS );
pEdit3 = (CEdit *) GetDlgItem( IDC_INFO_TOP );
pEdit1->SetFont(pFontNew);
pEdit2->SetFont(pFontNew);
pEdit3->SetFont(pFontNew);
}
return TRUE;
}
but once I added the if ( pApp->g_Settings.language == LNG_CHINESE ) { ... } block,
the screen become black, nothing be displayed.
modified 19-Mar-14 18:54pm.
|
|
|
|
|
|
Hello Audio/Video gurus. I have managed to render a local .mp4 file using Source Reader. I pass the path of the local file in the funtion MFCreateSourceReaderFromURL.
I tried to do the same for rendering a camera on my LAN and passed it's URL into the said function. But it gives error. Error code is 0xc00d36c4. Watching this error's description, it says that byte stream of the given URL is unsupported.
Question is: DO I have to write my own media source or something to get RTSP packets or this could be done by playing with Source Reader's properties/attributes? Thanks for your input.
NOTE: I have not tried to interact with or modify any networking related property of Source Reader other than passing this camera URL.
modified 19-Mar-14 7:58am.
|
|
|
|
|
I need a device built for a school project. The device will play a simple game, something like who wants to be a millionaire, and be built solely for that purpose. The game questions needs to be updatable from point to point. Something as small as the nokia 101 would be perfect. I guess the program can be written in C, C++ or the likes and I'm pretty sure I can handle that bit, what I really need help with is the device building. I'm clueless there. Any help would be appreciated.
|
|
|
|
|
Do you really think an answer to a question of this magnitude can be provided in such a forum? 
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
