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See
SYSTEMTIME m_SysTime;
char DisplayTime[255];
::GetSystemTime(&m_SysTime);
sprintf(DisplayTime,"%d/%d/%d...%d::%d::%d::%d",
m_SysTime.wMonth,m_SysTime.wDay,
m_SysTime.wYear,m_SysTime.wHour,
m_SysTime.wMinute,m_SysTime.wSecond,m_SysTime.wMilliseconds);
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Hi All,
I'm trying to overload the assignment (=) operator so that I can achieve the following:
int x = myclass;
instead of:
int x = myclass.Value();
I am implementing it as follows:
class CMyClass
{
private:
int m_nValue;
public:
int& operator=(CMyClass& class);
int Value() { return m_nValue; };
};
int& CMyClass::operator=(CMyClass& class)
{
return class.Value();
}
But I keep on getting a compiler errors either saying that there is no suitable conversion, or that it cannot convert from CMyClass to int.
Clearly my syntax (or something) is screwed, so how can I fix it ?
Thanks
OD
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Write a casting operator instead:
operator int() const { return m_nValue; }
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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Damn, you were faster 
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Nemanja Trifunovic wrote: Damn, you were faster
Hehe, sometimes I get lucky. 
Haven't refreshed in about two hours.
It was a good thing that we suggested the same thing though...
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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Thanks, worked like a charm !
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od@ananzi.co.za wrote: I'm trying to overload the assignment (=) operator so that I can achieve the following:
int x = myclass;
instead of:
int x = myclass.Value();
If I got your intention correctly, you need operator int, not operator =
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I'm porting a legacy app. This code was fine in VC6, but VS2005 doesn't
like it:
struct CColumnBool
{
std::vector<bool> m_vBoolData;
CColumnBool()
{
m_vBoolData.clear();
};
bool& operator[](UINT uiRow)
{
return m_vBoolData[uiRow]; // <--- error on this line...
};
const bool& operator[](UINT uiRow) const
{
return m_vBoolData[uiRow];
};
};
The error is this:
error C2440: 'return' : cannot convert from 'std::_Vb_reference<_MycontTy>' to 'bool &'
with
[
_MycontTy=std::vector>
]
The weird thing is that this code does NOT generate the same error:
struct CColumnInt
{
std::vector<int> m_vIntData;
CColumnInt()
{
m_vIntData.clear();
};
int& operator[](UINT uiRow)
{
return m_vIntData[uiRow];
};
const int& operator[](UINT uiRow) const
{
return m_vIntData[uiRow];
};
};
C2440 is a type conversion error, of course. MSDN lists several
causes for this, but I don't see where they apply. Any ideas
how to fix this?
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Adis H. wrote: This may help perhaps:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1354391&SiteID=1[^]
Yes, that's it exactly. Thanks! 
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std::vector<bool> is not based on an array of bool. Instead the bits are packed, and as such it is impossible to take the address of any given bit, or create a reference to it. Instead operator[] has to return a proxy class.
This is a specialization of the vector template required by the C++ standard. This is widely considered to be a massive error in the standard. Unfortunately it is required, in order to claim conformance to the standard.
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Mike Dimmick wrote: This is widely considered to be a massive error in the standard.
I would think so. Thanks for the explanation.
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Hi
Is it possible to open a html-file at a given anchor-point using ShellExecute? Or should I use another method?
I tried to use the following argument to ShellExecute open
file://C:/afile.htm#alocation
and the file opens, but always from the top.
drives me crazy
tia
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::ShellExecute(NULL, _T("open"), _T("C:\\afile.htm#alocation"), NULL, NULL, SW_SHOWNORMAL);
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Honestly, you haven't tried that, have you?
Do you at all think it will work?
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Niklas Lindquist wrote: Honestly, you haven't tried that, have you?
yes i did, and you ? 
Niklas Lindquist wrote: Do you at all think it will work?
not it will, it does ! 
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I get ERROR_FILE_NOT_FOUND from that. (Which to me seems like a reasonable thing, since the number character is valid in a windows path.)
Adding "file://" in front will bring up the correct file, but always shown from the top.
Removing "#alocation" also works (in that it brings up the correct file, but not located at the anchor point obviously).
WinXP IE6
I still doubt that it works for you. 
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ah, sorry, it was the anchor that matters... have you tried passing te anchor parameter into the "parameters" argument ?
like this (this one, i didn't test) :
::ShellExecute(NULL, _T("open"), _T("C:\\afile.htm"), _T("#alocation"), NULL, SW_SHOWNORMAL);
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Been there, done that.
Right now it feels like I've tried every single possibility but the right one.
Maybe one should use another function altogether? Or is it even impossible, since I'd like it to work with Firefox et al aswell, depending on default browser? I don't want to add browser dependencies to the code.
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The file: URL parsing has changed in IE 7.0 to be stricter. That means you may see differences between IE 6.0 and 7.0.
See here[^] for how to properly construct a file: URL.
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i'm trying my hand at subclassing a control in an mfc dialogue app. i've seen examples on-line of subclassing the CButton and CStatic classes. however, the class wizard in visual studio 2005 does not give me these classes in the Base Class combo box. has the class wizard changed from earlier versions?
thanks for the help!
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See here.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Hello,
I have a tabbed control with three tabs. Each tab has a tree control. Each one of these is its own dialog. I have the parent tabbed control dialog in a CDialog bar so that it can dock to the main window. I am trying to make this main CDialogBar resizable but it seems to be locked and will not resize. When I pass the parameter of CBRS_SIZE_DYNAMIC to the CDialogBar, and when I click on the barder of the dialog bar, the mouse will change to the mouse icon you get when you go to resize a window, but the CDialogBar boarder does not move so I do no get the WM_ONSIZE message.
Any suggestions on how I can get my CDialogBar to resize?
I have some code at the bottom, this is how I am making my CDialogBar.
Thanks,
Shane
m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
EnableDocking(CBRS_ALIGN_ANY);
DockControlBar(&m_wndToolBar);
m_wndDialogBar.Create(this,IDD_DISPLAYDIALOG, WS_VISIBLE|WS_CHILD|CBRS_LEFT|CBRS_SIZE_DYNAMIC, 1);
m_wndDialogBar.SetWindowText("Display Control");
m_wndDialogBar.SetBarStyle(m_wndDialogBar.GetBarStyle() | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC); //| CBRS_SIZE_DYNAMIC
m_wndDialogBar.EnableDocking(CBRS_ALIGN_RIGHT|CBRS_ALIGN_LEFT);
DockControlBar(&m_wndDialogBar);
m_wndDialogBar.DelayShow(FALSE);
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I am trying to do image bit manipulation on a 32 bit image, using the data from an 8 bit gray scale image to modify the 32 bit image's alpha values.
However, when I loop through the bits, and assign the value of the gray scale image to the 32 bit image I seem to get weird distortions. If I simply bitblt the the gray image to the 32 bit image, the resulting picture of the 8 bit image looks correct.
So what am I missing? Is there something special you need to do when sequentially accessing 8 bit image data?
Both images are created with the CreateDIBSection() API.
The 8 bit creation looks like this:
bmpInfo->bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
bmpInfo->bmiHeader.biWidth = width;
bmpInfo->bmiHeader.biHeight = -height;
bmpInfo->bmiHeader.biPlanes = 1;
bmpInfo->bmiHeader.biBitCount = 8;
bmpInfo->bmiHeader.biCompression = BI_RGB;
bmpInfo->bmiHeader.biSizeImage = width * height;
bmpInfo->bmiHeader.biClrUsed = 256;
RGBQUAD* colors = &bmpInfo->bmiColors[0];
for ( int i=0;i<bmpInfo->bmiHeader.biClrUsed;i++ ) {
colors->rgbBlue = i;
colors->rgbGreen = i;
colors->rgbRed = i;
colors->rgbReserved = 0;
colors ++;
}
hbmp_ = ::CreateDIBSection ( dc_, bmpInfo, DIB_PAL_COLORS, (void **)&data_, NULL, NULL );
Now my understanding is that the bits are now acessible via the data_ member. This is simply an unsigned char* variable.
I should be able to access any pixel of the gray scale image like so:
unsigned char& pixel = data_[(y*bmpInfo->bmiHeader.biWidth)+x];
Whats the grayscale image looks like after a bitblt:
http://vcf-online.org/pics/grayscaleimage.png[^]
What the composited 32bit image looks like after sequentially iterating through all the pixels of the image and applying the value of the grayscale pixels to the 32 bit image's alpha:
http://vcf-online.org/pics/image-alpha.png[^]
The second one is obviously screwed up, but I'm not seeing where the problem is.
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Just a guess, but the fact that the distortions are running diagonally across the picture points me to byte alignment. I am not sure of the exact specs (would have to look that up and am too lazy at the moment) but the data for each row has to be aligned on a DWORD boundary. If the bitmap is an odd width, and you simply traverse and change the data without taking the alignment into account you would get the kind of thing you are seeing.
You may be right
I may be crazy
-- Billy Joel --
Within you lies the power for good, use it!!!
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