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Thanks for your answer Derek allthough i had already got it to work.
Kuniva
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Hello
is there a similiar "with" statement in c++ like in delphi?
for example I can do a lot of drawing stuff with this procedure:
with Foo do
begin
Rectangle...
LineTo...
MoveTo...
end
this way I don't need to put "Foo" before each function
modified 12-Sep-18 21:01pm.
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Could you please explain a bit what namespaces do and how to use them?
I never used them
regards
Gregor
modified 12-Sep-18 21:01pm.
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a namespace is a way of encapsulating a set of classes (or functions, or variables, etc).
you can do something like this:
namespace fred
{
class myClass
{
...
};
}
now, if you want to create an object of type myClass, you have to tell the compiler to look in the "fred" namespace, like this:
fred::myClass var;
or, you can use the "using" keyword, like this:
using namespace fred;
myClass var;
"using" just tells the compiler that it's OK to search the namespace "fred" for any object definitions that it might need.
-c
Smaller Animals Software, Inc.
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Thanks a lot!
But actually they're not a real substitute for the "with"-statement
regards
modified 12-Sep-18 21:01pm.
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Chris Losinger wrote:
"With" is a Pascal thing
Yes. It is also present in VB. Quite a nice feature, I think.
I vote pro drink
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There's no equivalent of "with" in C/C++ but if you wanna avoid is typing a large name over and over again, you can create a short-name version of it using a reference variable:
CSomeType& t = thisReallyLongAndHorribleVariable;
t.Rectangle(...);
t.LineTo(...);
t.MoveTo(...);
Regards,
Alvaro
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What's wrong with this piece of code?
The destructor of Class Value is never been called!
If I try to set a breakpoint there, the compiler immediately
disables it.
What am I doing here that's against the rules?
.h file
class Value
{
public:
unsigned char *pvalue;
Value(int size)
{
pvalue=new unsigned char(size);
}
~Value()
{
delete [] pvalue; <-- No break point here
}
};
class Parameter
{
public:
CString Name;
CString MenuItem;
void *pValue;
void *ValueText;
Parameter *next;
Parameter()
{
pValue = NULL;
next = NULL;
}
~Parameter()
{
if(pValue)
delete pValue;
}
};
.cpp file
Parameter* Parm = new Parameter();
Parm->pValue = new Value(4);
delete Parm;
Thanks, Arjan
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You're probably confusing the debugger by having your implementation of ~Value() inside the class definition. split it up, put the definition in a .h file, and the implementation in a .cpp file. And it really is a sensible convention to start class name "C", ie "CValue".
Sorry to dissapoint you all with my lack of a witty or poignant signature.
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hi all,
well this is a pretty long post, i have to warn you.
my problem lies in a program. the program parses conifguration files (transferred from os2) which are structered like that:
program1 key1 value1
program1 key2 value2
program2 key1 value1
program2 key2 value2
the program searches for a key (sz_addAfter) from a program sz_Prg. if it finds the key sz_addAfter it inserts the newKey and newValue after that Key.
if it can't find the key sz_addAfter it inserts the key at the end of the block of the program sz_Prg.
to insert a new key i use the function AddKey. It calls the little helper function CreateNewLine to insert the line.
the problem is that this program works most of the time very well.. but.. under rare circumstances it deletes one line from the source file (the last one).
i can't find which circumstances.. i just know that this happens from time to time.
the files are on a shared network folder and many processes can access them.
my problem is right now that i don't have got any clue, why this can happen, so i would be very happy if someone could find a flaw in the code and / or post
a better one for this problem.
sorry if there should be any typos in the code, cause i had to translate it from german to english.
thank you in advance
bernhard
the code i am talking about:
inline void CreateNewLine (const char* sz_Prg, const char* sz_newKey, const char* sz_newValue, int pos[3], std::string &newLine)
{
newLine = sz_Prg;
for (int i = 0; i < pos[2] ; i ++)
newLine += " ";
newLine.insert (pos[1], sz_newKey);
newLine.insert (pos[2], sz_newValue);
newLine.erase( newLine.find_last_not_of(" ") + 1);
}
bool AddKey (const char* sz_Prg, const char* sz_addAfter, const char* sz_newKey, const char* sz_newValue)
{
m_message = "";
int i = 0;
int pos [3] = {0};
std::ifstream file (m_filename.c_str());
std::ostringstream stream;
std::string line1;
std::string line2;
std::string newLine;
bool f_change = false;
while (1)
{
if (++i > 50000)
{
return false;
}
int i_changepos = 0;
int prgpos1 = 0;
int prgpos2 = 0;
int keypos1 = 0;
int keypos2 = 0;
if (!std::getline (file, line1))
break;
std::streampos here = file.tellg();
std::getline (file, line2);
file.seekg (here);
prgpos1 = line1.find (sz_Prg);
prgpos2 = line2.find (sz_Prg);
if (prgpos1 != std::string::npos || prgpos2 != std::string::npos)
{
for (int i = 0; i < 3; i ++)
{
if ( (i - 1) < 0)
pos[i] = line1.find_first_not_of (" ");
else
pos[i] = line1.find_first_not_of (" ", line1.find_first_of(" ",pos[i-1]));
}
}
keypos1 = line1.find (sz_addAfter);
keypos2 = line2.find (sz_addAfter);
if (keypos1 != std::string::npos && prgpos1 != std::string::npos && !f_change)
{
CreateNewLine (sz_Prg, sz_newKey, sz_newValue, pos, newLine);
f_change = true;
i_changepos = 1;
}
if (prgpos1 != std::string::npos && prgpos2 == std::string::npos && f_change == false)
{
CreateNewLine (sz_Prg, sz_newKey, sz_newValue, pos, newLine);
f_change = true;
i_changepos = 1;
}
if (i_changepos == 1)
stream << line1 << std::endl << newLine << std::endl;
else
stream << line1 << std::endl;
}
file.close();
if (f_change)
{
std::ofstream out (m_filename.c_str(), std::ios::trunc);
out << stream.str();
}
return true;
}
"There are three roads to ruin: women, gambling and technicians. The most pleasant is with women, the quickest is with gambling, but the surest is with technicians." Georges Pompidou
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Hi, All!!!
=======
I have created a based dialog application using the MFC wizard.
I inserted an activeX control - Microsoft Internet Explorer.
The class wizard generated a code for me to use with this control (create CExp for the ctrl).
void CFooDlg::OnButton1()
{
CButton *qqq= new CButton();
qqq->Create(&qqq.wndTopMost, 50,50,300,300,SWP_NOSIZE);
qqq->ShowWindow(SW_SHOW);
}
the problem is that no matter what I do, it always covered by the activeX control
(button, edit, listbox, ...) and when I click on it where the listbox ctrl is under it
the CButton loses its focus
Why ???
How can I solve it ???
Please, Help me if u can.
thanks.
BTW: come to #CodeProject on DalNet (mIRC)
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qqq->Create(&qqq.wndTopMost, 50,50,300,300,SWP_NOSIZE);
This compiles for you?
/ravi
"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com
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I guess it should be..
qqq->Create(&wndTopMost, 50,50,300,300,SWP_NOSIZE);
// Fazlul
Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com
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Actually the prototype I've seen is:
virtual BOOL CWnd::Create
(LPCTSTR lpszClassName,
LPCTSTR lpszWindowName,
DWORD dwStyle,
const RECT& rect,
CWnd* pParentWnd,
UINT nID,
CCreateContext* pContext = NULL); /ravi
"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com
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Actually, for CButton, the prototype is:
<br />
BOOL CButton::Create( LPCTSTR lpszCaption, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID );<br />
Is this SWP_NOSIZE from SetWindowPos?
I vote pro drink
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Oops, I was confusing with SetWindowPos
CWnd::SetWindowPos (
const CWnd* pWndInsertAfter,
int x,
int y,
int cx,
int cy,
UINT nFlags );
// Fazlul
Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com
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Me too.
I ment SetWindowPos
qqq->Create(...);
qqq->SetWindowPos(&qqq->wndTopMost, 50,50,300,300,SWP_NOSIZE);
qqq->ShowWindow(SW_SHOW);
Sorry 4 the confusion.
I still don't have an answer.
Please help.
BTW: come to #CodeProject on DalNet (mIRC)
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Sagiv:
I need to look at your code more closely. Can you please
send a (zipped) sample app to fkabir@capitolsoft.com?
Cheers.
// Fazlul
Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com
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ok
BTW: come to #CodeProject on DalNet (mIRC)
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Thanks for sending the code. Try this.
void CDlg::OnButton1()
{
CButton *qqq= new CButton();
qqq->Create("ASD", WS_CHILD | WS_VISIBLE, CRect(20,20,200,200), this, 12345);
qqq->BringWindowToTop();
} As a side note, your code will cause a memory leak (a CButton object). You should declare the object in stack instead of heap
class CDlg : public CDialog
{
..
..
CButton m_Button;
..
..
};
void CDlg::OnButton1()
{
m_Button.Create("ASD", WS_CHILD | WS_VISIBLE, CRect(20,20,200,200), this, 12345);
m_Button.BringWindowToTop();
}
// Fazlul
// Fazlul
Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com
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You right.
But there is one little BUG left.
Try to cover the window and then uncover it.
Then you'll see that the listbox is painted on top of the button.
Do you know how can I change the tab order during run-time ?
BTW: come to #CodeProject on DalNet (mIRC)
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The cleaner solution to your problem would be to to set the tab order of the controls right. To do this, open the dialog template in VC++ resource editor and then select "Layout - Tab order" menu option. Now click on the blue boxes with numbers to set the tab orders of the controls. If you do this, you do not need the BringWindowToTop call, since the new button will be created using WS_TABSTOP style, as shown below.
void CDlg::OnButton1()
{
m_Button.Create("ASD", WS_CHILD | WS_VISIBLE | WS_TABSTOP,
CRect(20,20,200,200), this, 12345);
}
// Fazlul
Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com
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I think the tab order is not solution.
from 1 reason: it doesn't work .
try to cover the window and then uncover it again.
I'm hopeless
BTW: come to #CodeProject on DalNet (mIRC)
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