C / C++ / MFC

Re: Toggle line numbers in MS Visual C++ 6.0

3-May-05 16:49

No such option exists. The only way to know what line the cursor is on is by the Line/Col indicator down in the lower right corner next to the keyboard status indicators.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

knapak4-May-05 8:43

knapak

4-May-05 8:43

well... that sucks... D'Oh! | :doh:

thanks anyway!

PopUp Menu

javi_jmc3-May-05 12:30

javi_jmc

3-May-05 12:30

Hi everybody,

I have created an PopUp Menu in a CDialog...it works OK.

Now I want to create a PopUp Menu inside an ActiveX every time I click Button RIGHT of the mouse...
I have copied the code inside the function WM_RBUTTONDOWN...The problem is that it shows the Menu but it is DISABLED (it is shown but I can not select an option).

How can I do it to solve it...to make it enable?

Thanks

Here the code :

HMENU hMenu = ::CreatePopupMenu();
if (NULL != hMenu)
{
// add a few test items
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 1, "Change Color");
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 2, "Hide");
::AppendMenu(hMenu, MF_ENABLED | MF_STRING & !MF_GRAYED, 3, "Item 3-");

ClientToScreen(&point);

int sel = ::TrackPopupMenuEx(hMenu,
TPM_CENTERALIGN | TPM_RETURNCMD,
point.x,
point.y,
m_hWnd,
NULL);

CString s;

s.Format("The selected item is %d", sel);
TRACE(s);

:estroyMenu(hMenu);

Re: PopUp Menu

Ryan Binns3-May-05 18:40

Ryan Binns

3-May-05 18:40

javi_jmc wrote:
& !MF_GRAYED

These parts are not necessary, and will actually screw it up and make it not work.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

How to implement delay

hithesh3-May-05 12:22

hithesh

3-May-05 12:22

How do I implement 'delay' in VC++?
I also need to find out a way to get the "time elapsed" between two commands like when the data on the serial port goes high.

Can some one also give me info on the following -
GettickCount
Dword
VERIFY
ASSERT
dwcount

Thanks in advance.

-hithesh

Christian Graus3-May-05 13:37

3-May-05 13:37

Sleep is the command to make your app stop for a bit.

hithesh wrote:
Can some one also give me info on the following -

msdn.microsoft.com can.

hithesh wrote:
GettickCount

The GetTickCount function retrieves the number of milliseconds that have elapsed since the system was started. ( first hit on google )

hithesh wrote:
Dword

A DWORD is an unsigned long. It's a really big number.

hithesh wrote:
ASSERT

An ASSERT is a construct that will fail if the condition you pass it fails. This means that in debugging, you can check the assumptions that your code makes about the state of your application at any point. It is not included in release builds, and should be used for debugging only.

hithesh wrote:
dwcount

Is probably a variable called count, that is of type DWORD, and has been created using Hungarian notation ( where the first few letters of a camel case variable name denote the type of the variable )

Christian Graus - Microsoft MVP - C++

Anonymous3-May-05 14:01

Anonymous

3-May-05 14:01

Christian, Thanks for the answers.
For the delay, I knew about sleep. I need something thats similar to a timer.

like -

1. when a bit goes high
2. start timer
3. stop timer when the bit goes low.

Sleep is used when you know the amount of delay you want, right? If this is not right, plz gimme an example.

Christian Graus3-May-05 14:06

3-May-05 14:06

Anonymous wrote:
Sleep is used when you know the amount of delay you want, right?

Yes.

I don't know of any way to do this without implimenting it yourself, unless there's a variation on WaitForSingleObject that waits for a memory location to change. I'd imagine the thing to do is use sleep to sleep for small amounts of time, and then check your bit inbetween.

Christian Graus - Microsoft MVP - C++

hithesh23-May-05 14:34

hithesh2

3-May-05 14:34

chris,

How about settimer()?
I can't use sleep because, I am trying to find out the time duration during which the input is high and also the time duration during which the input is low. This is from the serial port which receives the Infra red signal from the TV remote. Then, I send the same signal out. Its kinda like learning.

Christian Graus3-May-05 14:46

3-May-05 14:46

Oh, OK. I've done stuff like that before. Yes, I used SetTimer inside my class that watches the serial port, and you can use a get time function to get the time before and after, to work out an interval. My code was in C#, and I was using the serial port as an input device.

Christian Graus - Microsoft MVP - C++

hithesh3-May-05 16:54

hithesh

3-May-05 16:54

Can you give me an example. I looked at msdn, no good.
Thanks.

-hithesh

Christian Graus3-May-05 16:58

window stops repainting...

3-May-05 16:58

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/timers/timerreference/timerfunctions/settimer.asp[^]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/multimed/htm/_win32_timegettime.asp[^]

That should give you a good start.

Christian Graus - Microsoft MVP - C++

Ramsus3-May-05 10:02

Ramsus

3-May-05 10:02

Hi everyone,
I have a main window with a gradient background onto which client area I output text using DrawTextEx. The background of the rectangle of the drawtext function is set to transparent. I invalidate this rectangle everytime I change the text so that the new text will be visible on the gradient background. This works fine for a while and then suddenly windows seems to stop painting the window all together ....? The text still continiues to be outputed , but on a white rectangle background now. The window does not seem to repaint either. I am using straight WIN32 api and simple message handling.
Anybody have any ideas ? This is driving up the walls... help will be much appreciated.

Carpe Deum

Re: window stops repainting...

Ravi Bhavnani3-May-05 11:34

Ravi Bhavnani

3-May-05 11:34

Perhaps you're not freeing resources (pens, brushes) you use in your painting code? That could lead to resource exhaustion. Try adding VERIFYs to your code to verify correct operation and see if they fail.

/ravi

My new year's resolution: 2048 x 1536
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ravib@ravib.com

hlp me out!!

Member 18801463-May-05 9:40

Member 1880146

3-May-05 9:40

I write the code which is given below that is getting ram and hard disk capacity from user than saving it in a file and than displaying the file. after that i jst want to display all the records entered by the user and also display the total number of computers whose records were entered by the user. plz hlp me what should i do. code is below:

//Header Files
#include <iostream.h>//header file for input output streams
#include <fstream.h>// Header for file I/O
#include <conio.h>//header file for console input output

using namespace std;

//computerspec structurre
struct computerspec {
int ram;
int hdisk;
}compuspec;

int main()
{//start main
char ch;

ofstream out("computerspec.txt");//creating file name

out<<"RAM"<<"\t"<<"Hard disk"<<endl;

do=""
="" {="" start="" of="" while="" loop
="" prompt="" the="" user="" to="" enter="" ram="" capacity
="" cout<<"enter="" capacity"<<endl;
="" cin="">>compuspec.ram;
//for new line
cout<<endl;

prompt="" the="" user="" to="" enter="" hard="" disk="" capacity
="" cout<<"enter="" capacity"<<endl;
="" cin="">>compuspec.hdisk;
//for new line
cout<

Maximilien3-May-05 9:44

Maximilien

3-May-05 9:44

what's the problem ?

Maximilien Lincourt
Your Head A Splode - Strong Bad

David Crow3-May-05 10:45

3-May-05 10:45

While it is not hurting anything, why do you have the computerspec structure if you are using the member variables individually? I would think you'd want something like:

struct computerspec 
{
    int compnum;
    int ram;
    int hdisk;
};
 
void main( void )
{
    computerspec compuspec;
 
    compuspec.compnum = 1;
    compuspec.ram     = 1024;
    compuspec.hdisk   = 80;
    out << compuspec;
 
    compuspec.compnum = 2;
    compuspec.ram     = 4096;
    compuspec.hdisk   = 40;
    out << compuspec;
    
    ...
 
    compuspec.compnum = -1;
    compuspec.ram     = 0;
    compuspec.hdisk   = 0;
    out << compuspec;
 
    out.close();
 
    ...
  
    // read each "record" in the file
    do
    {
        in << compuspec;
    } while (compuspec.compnum != -1);
}

Note that this is untested and may not be syntactically correct but I am just trying to give you an idea.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Member 18801463-May-05 20:44

Member 1880146

3-May-05 20:44

Still i m not getting what i want to know!!! plz smebody hlp!!

David Crow4-May-05 2:21

4-May-05 2:21

rose aashii wrote:
Still i m not getting what i want to know!!!

What is it that you are still wanting to know?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Converting char to char*

talkster53-May-05 9:10

talkster5

3-May-05 9:10

I am farily new to c++ and have been trying to compile something but it is giving errors about converting the two different types of char. Is there anyway that I can actually convert the char to a char* or have I got completley the wrong idea?

Wes Aday3-May-05 9:16

Wes Aday

3-May-05 9:16

I think that you are off base.... post the code that you are having a problem with so we can help you better.

Artificial intelligence is no match for natural
stupidity.

Never argue with an idiot. They will drag you down to their level where they are an expert.

talkster53-May-05 9:24

talkster5

3-May-05 9:24

CIni ini;
ini.SetPathName(_T("D:\\Programs\\Microsoft Visual Studio\\MyProjects\\Prog12\\Debug\\IniDemo.ini"));
char test = ini.GetChar(_T("History"), _T("Input"), TCHAR("NoneSet"));
char* Program = "";
char* Paramaters = "";
char* workingDirectory = "";
// Now just use ShellExecute to run it
ShellExecute( NULL, "open", Program, Paramaters, workingDirectory, SW_SHOW );

The char test is the one that I need to be char* otherwise the ShellExecute will not work properly. I dont really understand all of that code yet which is probably why I cant do it correctly.

David Crow3-May-05 10:32

3-May-05 10:32

talkster5 wrote:
The char test is the one that I need

Since test is not being used, why do you need it at all?

What does CIni::GetChar() return? More importantly, what is the third parameter supposed to be? I'm not sure why the class differentiates between getting a char vs. getting a string, but in any case, you need to change your code to the following in order to pacify the compiler:

char test = ini.GetChar(_T("History"), _T("Input"), ' ');

Why are you mixing _T() and TCHAR()? That in itself doesn't hurt anything but it does make your code hard to read.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown