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could anyone please tell me where can i find source code for "testing random numbers".
i'd appreciate it sooooo much....
thanx
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A single-tailed chi-square test should suffice. You should be able to find some code that does this on Google...
"Oh, I'm sick of doing Japanese stuff! In jail we had to be in this dumb kabuki play about the 47 Ronin, and I wanted to be Oshi, but they made me Ori!"
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Suppose that there is a window of another process and that window has a CListCtrl on it , i only have the CWnd pointer of the main window that hosts the CListCtrl, i need to add/remove entries in that CListCtrl, ...
My approach is that
First i need to first get access to the CListCtrl window by getting its handle using
BOOL EnumChildWindows( HWND hWndParent,
WNDENUMPROC lpEnumFunc,
LPARAM lParam
);
and once i get this handle i would either try to get CWnd* from it or try sending LVM_XXX messages using CListCtrl handle...
I am unsure about if all this would work ...
any of you guys , if have any views please share
Ahmed
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If you have the CWnd pointer of the target window (main window, for now), then continuing from there is very, very easy.
First, use GetTopWindow to get the first child window of the main window. Save this into a seperate pointer. Using the returned pointer, first call ::GetClassName to get the class name of the window. Specify CWnd::m_hWnd as the HWND parameter. If the returned name matches "SysListView32", then this CWnd is the list view control.
If the name doesn't match, use the child window pointer and call CWnd::GetWindow( GWL_HWNDNEXT ) to retrieve the next window in the chain. When the pointer is returned, use CWnd::IsChild with the main window pointer to determine if this window is still a child of the target window. If it is, compare the ::GetClassName again with the list view control classname.
After you find the CWnd that
a) Is a child of the main window
b) Matches the list view control classname,
then use DYNAMIC_DOWNCAST like this:
CListCtrl* pListCtrl = DYNAMIC_DOWNCAST( CListCtrl, pMainWindow ); This will give you a pointer to the CListCtrl class of the list control. If the returned value is NULL, the cast failed. It shouldn't be NULL, because the SysListView32 is encapsulated by the CListCtrl. Remember that your project must be compiled with the Run-Time Type Checking option set to Yes. Otherwise the cast will also fail.
Now use the CListCtrl pointer to manipulate the list view control.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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Hi,
I have pasted a peice of code that I use to create the combo box dynamically, but found that it draws a edit box, not a combo box.
CComboBox m_schemaCombo;
m_schemaCombo.CreateEx( WS_EX_CLIENTEDGE, _T("COMBOBOX"), NULL,
WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_BORDER | ES_NUMBER,
CRect(row3,
frameTop + 3 * topBottomOffset + buttonHeight3,
editBoxWidth,
frameTop + 3 * topBottomOffset + buttonHeight2 + buttonHeight2),
this, IDC_SCHEMA_COMBO, 0 );
m_schemaCombo.SetFont( GetFont() );
Very sceptical about the 2nd argument of CreateEx. Can anybody help me out?
Also, please let me know the way to create a checkbox also.
Thanks,
Prashant
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Try using the CComboboxEx class instead of the Combobox class. I'm not very sure but I hope this is useful
Dipeka.A.J
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No CComboBoxEx did'nt help....
-Prashant
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I think the third parameter of createex cannot be NULL. Try using this->m_hWnd(pointer to parent dialog). Hope this helps
Dipeka.A.J
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The answer is quite simple.
What you are doing here is calling CWnd::CreateEx, that allows you to create child windows. However, there is a function call CComboBox::Create that will create a combo box control and attach it to the CComboBox object.
The calling convention for Create is a bit different, as you only need to supply the standard flags, rectangle, pointer to parent CWnd and the ID. This call doesn't allow you to specify extended window flags. But you can use GetExStyle, a bit mask and SetWindowLong to set the client edge extended style.
Another reason why it creates an edit box might be because of the ES_NUMBER flag. This flag is meant for edit controls, not comboboxes. All combobox flags start with CBS_ prefix. Try removing it and see what happens.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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How about:
CComboBox m_schemaCombo;
m_schemaCombo.Create(WS_CHILDWINDOW | WS_VISIBLE | WS_TABSTOP | CBS_DROPDOWN,
CRect(row3,
frameTop + 3 * topBottomOffset + buttonHeight3,
editBoxWidth,
frameTop + 3 * topBottomOffset + buttonHeight2 + buttonHeight2),
this, IDC_SCHEMA_COMBO);
m_schemaCombo.SetFont(GetFont());
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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Thanks David....It worked.
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I am on XP and I have created an overlapped mode pipe. I call ConnectNamedPipe and set the event on wait in WaitForSingleObject. Problem comes when the WaitForSingleObject times out in release mode compile. Any other call to the pipe handle on which no client connects and connection time out throws some exception in release mode  . It all works fine in debug mode.
<br />
OVERLAPPED op;<br />
op.hEvent = CreateEvent(....<br />
HANDLE hPipe = ConnectNamedPipe(....<br />
<br />
switch(WaitForSingleObject(op.hEvent, 5000)<br />
{<br />
case WAIT_OBJECT_0:<br />
...
CloseHandle(hPipe);
<br />
case WAIT_TIMOUT:<br />
...
CloseHandle(hPipe);
}<br />
PS: every thing works fine in Debug mode...Exceptions come in on release mode
Atif
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Hi there
Im sorry because this is not realy a VC++ Question and its maybe the wrong forum...but here i am 
Does anyone knows some ressources/manuals (e.g. URL's, PDF's, ...) of how a normal bitmap is build/written? -> If possible - the newbie way
I need to write code which "writes" a bitmap to a file - but i cant use librarys or the win32/mfc/... methods for doing this 
Thanks for reading 
--------------------
select *
from users
where
iq > 60;
0 rows returned.
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Hi,
a bmp consists of a header and a colordefinition of each pixel. (so you get a header and a matrix of colors)
you can write the bmp bytewise with fwrite I think. just make sure the header is correct AND write the colors BACKWARDS (BGR instead of RGB). (one color is three bytes, no?)
a little help: open a bmp with a hex-editor. you'll see what I mean.
Hope this helps (a little )
"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix
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A Beginners Guide to Bitmaps[^]
and
Bitmaps and Palette Manipulation[^]
are just a couple of randomly picked examples when you use Google and search for Bitmaps!
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)
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Oh the google way
Thanks both of you
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I tried to make a project with one Document and 2 views. But I had a problem - i can't switch between them. How to do it?
In InitInstance i did this:
CSingleDocTemplate* pDocTemplate;
CSingleDocTemplate* pDocTemplate1;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CSDIMultiViewDoc),
RUNTIME_CLASS(CMainFrame),
RUNTIME_CLASS(CSDIMultiViewView));
AddDocTemplate(pDocTemplate);
pDocTemplate1 = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CSDIMultiViewDoc),
RUNTIME_CLASS(CMainFrame),
RUNTIME_CLASS(CSDIMultiViewListView));
AddDocTemplate(pDocTemplate1);
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Hi !
Here is a coding design question.
I defined a class in my application, let's call it CPoint.
In many other classes of my application, I have to manipulate lists of pointeurs on CPoint objects. I need to pass such lists by parameters.
For now, I defined, in each class using a list of CPoint a typedef like this :
typedef vector<CPoint*> PointList_t;
I'm now wondering if, instead of declaring such typedef in each class using a list of CPoint*, if it would be better coding practice to define such typedef in the CPoint class itselt :
class CPoint
{
public:
typedef vector<CPoint*> PointList_t;
...
};
and, in classes using a list of CPoint*, I would do (for example) :
void Foo(CPoint::PointList_t MyPointList)
{
CPoint::PointList_t::iterator It = MyPointList.begin();
...
...
}
The advantage of this new way of doing would be to avoid multiple declaration of the same typedef, the drawback is that I have to put CPoint:: each time I need a PointList_t and that I have to include the CPoint.h in the header of the classes using such typedef where a simple declaration of the class was enough with my first way of doing things.
What is your suggestion ?
Thanks !
Jerome
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I would always put the typedef where it fits best. In your example the best fit is within the CPoint class.
This way as you have stated it is defined only once. This also means that there is one point of maintenance.
IMO the drawbacks you have stated are not really drawbacks, just a little more typing!
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)
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I have been trying to define a structure and use it with a union, but the bit fields seem to cause the structure to be bigger than I expected.
e.g. ( 4 x 4 bit fileds + 2 float fields + short = 11 bytes)
But what I get is 28 bytes.
typedef struct <br />
{<br />
unsigned data : 4 ; <br />
}W03_SECOND_10_S_;<br />
<br />
typedef struct <br />
{<br />
unsigned data : 4 ; <br />
}W03_SECOND_1_S_;<br />
<br />
typedef struct <br />
{<br />
unsigned data : 4 ; <br />
}W03_SECOND_0_1_S_;<br />
<br />
typedef struct <br />
{<br />
unsigned data : 4 ; <br />
}W03_SECOND_0_01_S_;<br />
<br />
typedef struct <br />
{<br />
float data; <br />
}W05_PRICE;<br />
<br />
typedef struct <br />
{<br />
float data; <br />
}W07_NETCOST;<br />
<br />
typedef struct <br />
{<br />
unsigned short data; <br />
}W08_INDEX;<br />
typedef struct{<br />
W03_SECOND_10_S_ w03_second_10_s_;<br />
W03_SECOND_1_S_ w03_second_1_s_;<br />
W03_SECOND_0_1_S_ w03_second_0_1_s_;<br />
W03_SECOND_0_01_S_ w03_second_0_01_s_;<br />
W05_PRICE w05_price;<br />
W07_NETCOST w07_netCost;<br />
W08_INDEX w08_index;<br />
}TEST1_10;
union<br />
{<br />
TEST1_10 message_data;
unsigned short buffer[32];
}messageStructData;<br />
<br />
int sizeStruct = sizeof(messageStructData);
The size if 64 bytes, but the size of the TEST1_10 structure is 28 bytes (not 11 bytes)so each field of 4 bits is taking up 4 bytes
TEST1_10 message_data1;<br />
int sizeStruct1 = sizeof(message_data1);
sizeStruct1 = 28 bytes.
The short is being padded to 4 bytes as is each 4 bit field.
Is it possible to map bit fields onto a structure and then a union in C++.
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The best you will get is to set the byte alignment for structures to a single byte. Currently you must have it set to 4 bytes.
Look in the Project Settings under Code Generation
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)
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Thanks for your post, I set it to 1 byte and that reduced the count from 28 to 26.
Are they no way that I can used bit fields in the way I intended; i.e.
overlay these bit field and other fileds (short, float etc) with a buffer.
I did remove the wrapping of the bit fields from a struct:
typedef struct{<br />
unsigned data1 : 4 ; <br />
unsigned data2 : 4 ; <br />
unsigned data3 : 4 ; <br />
unsigned data4 : 4 ; <br />
W05_PRICE w05_price;<br />
W07_NETCOST w07_netCost;<br />
W08_INDEX w08_index;<br />
}TEST1_10;
this gave a size of 14 (2 floats, 1 short and 4 x 4 bit fields = 11 bytes)
But each 4 bit field is taking a byte; hence 14 bytes.
Any suggestions to get this scheme working?
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Without combining the fields in the struct I can not see how you can do this.
e.g.
typedef struct{<br />
BYTE data1and2; <br />
BYTE data3and4;<br />
W05_PRICE w05_price;<br />
W07_NETCOST w07_netCost;<br />
W08_INDEX w08_index;<br />
}TEST1_10;
Downside is that will have to do the bit manipulation on data1and2 and data3and4 in order to get the appropriate 4bit values however. Though a couple of functions should be enough to get and set the values.
Ant.
I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)
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