C / C++ / MFC

Christian Graus4-Nov-02 15:17

4-Nov-02 15:17

Now you're just trying to wind me up......

I agree with him in principle that new keywords should be created sparingly, but a lot of mistakes get made in the pursuit of noble goals.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

C^hris L^osinger4-Nov-02 17:29

C^hris L^osinger

4-Nov-02 17:29

Christian Graus wrote:
Now you're just trying to wind me up

never.

Christian Graus wrote:
but a lot of mistakes get made in the pursuit of noble goals

oh, i agree.

-c

“losinger is a colorizing text edit control”
-- googlism

Smaller Animals Software

Autunmsky4-Nov-02 12:57

Autunmsky

4-Nov-02 12:57

Thank you for all of your help....I think I'm just having a hard time understanding how to write it out in C++. My code still isn't working.....boy this is just a pain in the tush. Thanks for all of your help.....I guess I'll just keep on sinking on this program. Keep smiling...and remember today is today....don't drag it to the next.

Frown | :(

Autumn

Christian Graus4-Nov-02 13:12

4-Nov-02 13:12

#include < iostream >
#include < string >

using std::cout;
using std::cin;
using std::endl;
using std::string;


const string EQUIL = "equilateral";
const string ISOS = "isosceles";
const string SCALE = "scalene";


void DisplayOpeningScreen();
void Print6BlankLines();

int main()

{
   int side1 = 0;
   int side2 = 0;
   int side3 = 0;
   int halfper = 0;
   int area = 0;
   string sType;


// Display an opening screen and explain the program to the user

DisplayOpeningScreen();


// Have the user input 3 values representing the sides of a triangle

cout << "\nEnter first side of triangle: ";
cin >> side1;
cout << "Enter second side of triangle: ";
cin >> side2;
cout << "Enter thrid side of triangle: ";
cin >> side3;


if ((side1 + side2) > side3 && (side2 + side3) > side1 && (side1 + side3) > side2)
{ 

  cout << "\n\nThe three lengths can form a triangle.\n\n";

  if ((side1 == side2) && (side2 == side3) && (side1 == side3))
       sType= EQUIL;
   else if ((side1 == side2) || (side2 == side3) || (side1 == side3))
       sType = ISOS;
   else;
       sType = SCALE;

   cout << "This triangle is an " << sType << " triangle.  \r\n\r\n";

}
else
{
   cout << "\n\nThe three lengths can not form a triangle.\n\n";
}

Assuming the maths is all right ( I don't know ), this should work fine. Note I do not call endl over and over ( it does a flush as well and can be expensive ), I initialise my numeric variables, and I use only the bits of std that I need.

return 0;

}

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Help with Dialog Toolbars

Autunmsky4-Nov-02 14:29

Autunmsky

4-Nov-02 14:29

Thank you for everyone's help!!! I finally got it and I'm so happy. I hope you all the best and thank you once again!!! Have a great night!!

Big Grin | :-D

Autumn

Steven M Hunt4-Nov-02 10:33

Steven M Hunt

4-Nov-02 10:33

I need help with dialog toolbars. I am trying to create one, but I haven't figured out how to get the toolbar to "appear" enabled. It works, but the titlebar of the window is grayed. Is there any way to correct this?

-- Steve

Re: Help with Dialog Toolbars

dabs4-Nov-02 10:50

dabs

4-Nov-02 10:50

Have you checked out this article[^]?

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

CMenu question.

Anonymous4-Nov-02 10:11

How do i at runtime, draw a bitmap in my application?

4-Nov-02 10:11

Is there any reason this shouldn't work on 9x machines? It displays fine on my 2k machine but not on 98..

void CStatusBarEx::OnContextMenu(CWnd* pWnd, CPoint point) 
{
	if( point.x == -1 && point.y == -1 )
	{
		CRect	rect;		
		GetClientRect(rect);
		ClientToScreen(rect);	
		point = rect.TopLeft();	
		point.Offset(5, 5);
	}

	CMenu	menu;
	menu.LoadMenu(IDR_STATUS_BAR);

	CMenu* pPopup = menu.GetSubMenu(0);	

	CWnd* pWndPopupOwner = this;
	while(pWndPopupOwner->GetStyle() & WS_CHILD)
		pWndPopupOwner = pWndPopupOwner->GetParent();

	pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, 
		point.x, point.y, pWndPopupOwner);
}

Anonymous4-Nov-02 9:45

Re: How do i at runtime, draw a bitmap in my application?

4-Nov-02 9:45

thanks all!

Christian Graus4-Nov-02 9:56

4-Nov-02 9:56

This is the sort of question you should look to MSDN for an answer. All you're asking is how do I use pens and brushes on a bitmap, and there is plenty of documentation on that to go around.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

yes

Anonymous4-Nov-02 10:31

4-Nov-02 10:31

i've tried doing it from the examples in MSDN, but it's not working, so i wanted to see how you do it.

Re: yes

Christian Graus4-Nov-02 11:06

Do we really need "UINT mask"?

4-Nov-02 11:06

OK - some advice:

1. If you want to be taken seriously, try getting an account instead of posting anonymously. I obviously have answered anyhow, but a lot of people don't.

2. Seeing as everything I do with GDI I learned from MSDN, it's obvious you're doing something wrong. Any code I write seems as likely to cause you trouble as the MSDN samples. Posting some code would both show that you've tried to do it for yourself ( as opposed to just coming here and trying to be spoon fed ), and would also encourage people to help you. More importantly, it would mean that we could quickly tell you what you've done wrong instead of having to type up full examples for your benefit.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

MightyThor4-Nov-02 9:27

4-Nov-02 9:27

Hi,

I'm trying to develop a table control like Chris Mauder's GridControl. And like in GridControl or MFC's list control i created a struct to contain the elements to set for cell properties.

Now i wonder, instead of using a struct and specifying the mask variable so that it will understand which properties we want to change, can't we use a class and set all variables to NULL in the constructor? That way we wouldn't need to '&' the mask with predefined mask values and see if it's set or not, we could just check every variable if it's NULL or not.

Well, this makes sense to me but i need advice from experienced programmers.

Thanks in advance.

Christian Graus4-Nov-02 9:55

4-Nov-02 9:55

A struct is the same as a class, except it's members are public by default. There is no reason you cannot specify a constructor for a struct.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

MightyThor4-Nov-02 9:59

4-Nov-02 9:59

ok, so is it ok to specify a constructor in a struct or class and assign NULL to all variables and not to use masks as i mentioned in my previous post?

Thanks.

Christian Graus4-Nov-02 10:34

4-Nov-02 10:34

I think Daniel has answered your core question more directly, but I just wanted to note that a struct is a class, with only the one difference.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

MightyThor4-Nov-02 10:49

4-Nov-02 10:49

i understand and apreciate it. Thank you.

Daniel Turini4-Nov-02 9:55

Daniel Turini

4-Nov-02 9:55

Bit flags are widely used for performance reasons, not for style reasons. In a pure OOP, you're right. And maybe, using inline functions we could accomplish the same thing.
But, as I've said, programmers are so accostumed to do things this way, that they won't change so soon.
The other reason to do this is that it's much easier to change this flags using a single window message (WM_*) than to do it dispatching a ton of messages.
In some API calls this is also used to reduce the number of parameters. Ok, this could also be done with unions and bitfields but, it's so easy to do a ACCESS_READ | ACCESS_WRITE when calling a function, that's still done this way.

lazy isn't my middle name.. its my first.. people just keep calling me Mel cause that's what they put on my drivers license. - Mel Feik

MightyThor4-Nov-02 10:26

scroll using middle button

4-Nov-02 10:26

Thank you. So, since there are many issues i have to cover, i'd better stick to conventional ways instead of playing around to find something more comfortable. It probably will wind up causing problems or need to write to more code.

Thanks again.

orcun colak4-Nov-02 8:54

orcun colak

4-Nov-02 8:54

Internet Explorer allows me to scroll using middle button of my mouse. How can I do the same for a list control ?

Orcun Colak

Re: scroll using middle button

lucy4-Nov-02 9:39

lucy

4-Nov-02 9:39

handle the WM_MOUSEWHEEL message?

how to make one function dual duty?

ns4-Nov-02 8:04

4-Nov-02 8:04

I have a functionality in a trackpopupmenu (right context menu). I want to put this into my main menu as well. When the context menu item runs, it triggers a function: OnCustomContextEdit(). How can I make the same function run if I click on my new menu item? Or do I have to make a new OnStandardMenuEdit(), and cut and paste the code?
Thanks,

Appreciate your help,
ns

Re: how to make one function dual duty?

Anonymous4-Nov-02 8:06