C / C++ / MFC Discussion Boards

Chris Meech19-Dec-05 8:47

19-Dec-05 8:47

Your variable time1 is a pointer only. There are no bytes that it points to that you can then fill up with the sprintf call. Off the top of my head that is probably the same thing with variable t.

Chris Meech

I am Canadian. [heard in a local bar]

Remember that in Texas, Gun Control is hitting what you aim at. [Richard Stringer]

Nice sig! [Tim Deveaux on Matt Newman's sig with a quote from me]

-- modified at 14:55 Monday 19th December, 2005

Re: where is the mistake.

toxcct19-Dec-05 21:35

toxcct

19-Dec-05 21:35

for time1 :

iiscodered wrote:
char *time1;
sprintf(time1,"%d:%d:%d",t->wHour,t->wMinute,t->wSecond);

this is not correct.
you have to allocate the memory space to then be able to write there (with the sprintf() call...).
for example, add this :

<font color=blue>char</font>* time1 = <font color=blue>new char</font>[10];
 
<font color=green>// ...and don't forget to delete this memory then....</font>
<font color=blue>delete</font>[] time1;

for t :
first of all, choose variable names that denote clearly what it is supposed to do !!! t is not an explicit name.

iiscodered wrote:
LPSYSTEMTIME t;
GetLocalTime(t);

same this again here.
t is not allocated...

it seems to me that you are new to C++, aren't you ?
moreover, the compiler might have told you a clear enough message of what was going wrong in you code... read them with interrest, ,compiler is your friend !

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: where is the mistake.

Eytukan19-Dec-05 21:59

Eytukan

19-Dec-05 21:59

you should use 'new' .
i.e: char *time = new char(10);

"But your mind is very complex, very tricky. It makes simple things complicated. -- that's its work. And for centuries it has been trained for only one thing: to make things so complicated that your life becomes impossible."- Osho

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Re: where is the mistake.

toxcct19-Dec-05 22:05

toxcct

19-Dec-05 22:05

VivekuniQ wrote:
you should use 'new' .

do you rob the words in my mouth ?! Poke tongue | ;-P

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Re: where is the mistake.

Eytukan19-Dec-05 22:19

Eytukan

19-Dec-05 22:19

robbers put the stolen words first before the actual comes out. Big Grin | :-D

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Re: where is the mistake.

Eytukan19-Dec-05 22:21

Eytukan

19-Dec-05 22:21

hey i really didn't look at the replies, i read the qurey, and just clicked on 'reply'. then i found another idle guy has already replied for that. Laugh | :laugh:

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Re: where is the mistake.

Blake Miller20-Dec-05 4:37

Blake Miller

20-Dec-05 4:37

Just declare the 't' string to have soem data space available.
Do
char time1[32];
instead of
char *time1;
and it will be fine.

No shirt, no shoes, no brains, no service.

static data member.

paper6719-Dec-05 7:56

paper67

19-Dec-05 7:56

Hi,

Since I can't put the initialization of a static data member in the class definition, how can I assign the value of lets's say a document data member to an object's static data member ?

Thx.

Re: static data member.

PJ Arends19-Dec-05 11:38

PJ Arends

19-Dec-05 11:38

You have to do it in the cpp file

//Header file
class foo
{
   static int x;
   int doFoo();
};

// cpp file
int foo::x = 12;

int foo::doFoo()
{
    ...
}

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" - mYkel - 21 Jun '04

"There's not enough blatant self-congratulatory backslapping in the world today..." - HumblePie - 21 Jun '05

Within you lies the power for good - Use it!

Re: static data member.

vikas amin19-Dec-05 19:02

vikas amin

19-Dec-05 19:02

Is static data member accesible
only accessible by scope resolution operator .
say
by "this" pointer .(or pointer to class)

Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: static data member.

Eytukan19-Dec-05 21:27

Eytukan

19-Dec-05 21:27

that doesn't mean its accesible only by a "::", but since its accessed directly through a class we need to use ::. its not accessed thru an object.(.) if u do so by an object, it creates new values everytime new objects get instantiated but here ::, its static (same)for all.

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Graphics in dialog window

josephmanu19-Dec-05 7:20

josephmanu

19-Dec-05 7:20

When I draw to a dialog window using dc.SetPixel, everything looks great... until another window is moved over the dialog. All graphics are erased. How can I prevent this?

Re: Graphics in dialog window

C^hris L^osinger19-Dec-05 7:37

C^hris L^osinger

19-Dec-05 7:37

you have to do all your drawing in response to a WM_PAINT message, or in MFC-talk, in your window/dialog's OnPaint member. that function is called when your window needs to be repainted, and if you're painting anywhere outside that funciton, your stuff will be overwritten the next time the default drawing stuff gets called.

Cleek | Image Toolkits | Thumbnail maker

Re: Graphics in dialog window

josephmanu19-Dec-05 11:24

josephmanu

19-Dec-05 11:24

Thanks. That works pretty good. But I must be doing something else wrong. Below is a snip from a simple dialog program to draw a box when a button is pushed. I put the drawing stuff in the OnPaint. Although it does redraw the box most of the time, when I drag another window over the box slowly, sometimes I get lines where the box was not totally redrawn.

void CBoxDlg::OnPaint()
{
int x, y;

CPaintDC dc(this); // device context for painting

if (IsIconic())
{
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
if (draw_rectangle == TRUE)
{
for(x=0;x<100;x++)
{
for(y=0;y<100;y++)
{
dc.SetPixel(x,y,RGB(240,0,0));
}
}
}
}
}

void CBoxDlg::OnDrawButton()
{
draw_rectangle = TRUE;
RedrawWindow();
}

i need an example

markshte19-Dec-05 5:33

markshte

19-Dec-05 5:33

i need an example of open dialog box with Source Control button (meaning... open dialog box that allows to open regular files on a client computer and also allows to open files from Source Control (like sourcesafe)).

Tape Drive help required

Touseef Afzal19-Dec-05 2:09

Touseef Afzal

19-Dec-05 2:09

Hi,
i m working on a Project , to make backup on tape drive . i m having problem while writting the last DBLK on the tape and don't know how to find its help on net . do any of you GURU's plz refer any help avaiable on net for this problem.....

Thanks ....

"I only fail when i give up "

Re: Tape Drive help required

kakan19-Dec-05 2:40

kakan

19-Dec-05 2:40

Hello.

What's the problem?
If you want to know how to mark the end of a data file on tape, the normal way is to write a Tape Mark.

The rule is:
End Of File: A Tape Mark
End Of data on Tape: Two consecutive Tape Marks.

Is that your problem?

Kakan

Re: Tape Drive help required

Touseef Afzal19-Dec-05 3:29

Touseef Afzal

19-Dec-05 3:29

hi,
thanks for your reply ..

what i m doing is

i m writing Dblks in the following order , i have also check that windows backup utility makes backup in such way on tape drive ,

On PBA: 1
Tape Header
------------
On PBA: 2
Tape Mark
------------
On PBA: 3
SSET
Volb
Dirb
File
Espb
------------
On PBA: 4
Tape Mark
------------
On PBA: 5
ESET
------------
On PBA: 6
TFDD
------------
On PBA: 7
TSMP
------------
On PBA: 8
ESET
-----------
On PBA: 9
Tape Mark
-----------

After writting in this way i m checking with MTFCheck utility , which shows that there is problem from the ESET DBLK , ( PBA 5 )

=======================================================================
ESET Dblk:
[WARNING] Possible wastage of space: 15360 bytes.
[ERROR] Checksum failed in current stream header.

[ERROR] Valid ESET not found.
[ERROR] DBLK must be aligned with the FormatLogicaAddress boundary .
[ERROR] ESET was expected here.
[ERROR] Valid ESET not found.
ESPB was expected here.
[ERROR] Couldn't read data for valid ESET.
=================================================================

waiting for your reply

"I only fail when i give up "

Re: Tape Drive help required

kakan19-Dec-05 3:50

kakan

19-Dec-05 3:50

Hello.

OK, I get your problem.
But I'm sorry to say I can't help you. I thougt you were using raw tape writes, and had a problem with that.
I've created code to handle all major file systems on magnetic tape, but I haven't used Windows backup tape library.

Again, I'm sorry.
Kakan

Re: Tape Drive help required

Touseef Afzal19-Dec-05 4:07

Touseef Afzal

19-Dec-05 4:07

thanks for your reply...

may you plz refer me how to get solution of this problem on net . i have tried few other forums and not able to find any help for this...

thanks again ....

"I only fail when i give up "

Re: Tape Drive help required

kakan19-Dec-05 18:35

kakan

19-Dec-05 18:35

Hello again.

Have you seen this?
http://www.layton-graphics.com/mtf/MTF_100a.PDF[^]

Kakan

Re: Tape Drive help required

Touseef Afzal19-Dec-05 19:16

Touseef Afzal

19-Dec-05 19:16

hi,
yah , i have seen this , after making backup from NTBackup utility on tape drive , i can successfully restore the data , but i m facing problem in writing on tape drive , and writting according to MTF is really getting hectic for me ... plz reply...

"I only fail when i give up "

open jpeg file on listbox

uumeme19-Dec-05 1:33

uumeme

19-Dec-05 1:33

if listbox shows the path of a jpeg file, how can i open this jpeg file form a 32x32pixels picture on the front of row?

which lib should i use?

Re: open jpeg file on listbox

Maximilien19-Dec-05 2:50

Maximilien

19-Dec-05 2:50

you need to make an owner drawn listbox.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: open jpeg file on listbox

Pale_Master19-Dec-05 5:38

Pale_Master

19-Dec-05 5:38

library GDI+

class Graphics
class Bitmap

see in MSDN

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