Re: New to VC++ and MFC - C / C++ / MFC Discussion Boards

DevMentor.org9-Jul-07 17:46

9-Jul-07 17:46

Mark, yes a copy is always made for all automatic types when passing it around, in fact a copy is made when the object is thrown and placed onto the stack Smile | :)

you just have to vision the exception floating up and backwards through the call chain! Once it's caught by a handler, execution will continue as you found out at the very next statement outside the scope of the catch block. Using a reference means one extra step is spared of not having to copy the exception off the stack and into the catch handler parameter.That slipped my mind till your last note reminded me! and I see your earlier confusion about an object going out of scope before use Big Grin | :-D

Re: Throw

Mark Salsbery9-Jul-07 17:50

Mark Salsbery

9-Jul-07 17:50

Great description!

Thank you! Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

Get data into child control inside a simple Tab control

ndristephane4-Jul-07 23:54

ndristephane

4-Jul-07 23:54

Hi everybody!
I've got a big problem. It would be nice if someone could help me. Thanking you in advance.
I have created 4 tab windows as normal dialog boxes, then I can link those dialogs to the Tab control (using the code given at this website:http://www.codeproject.com/tabctrl/SimpleTab.asp.
In each dialog box, I've got some child controls like : Edit box, check box, button, combo box...
Now, I really want to read data, or to get data , even to exchange data between the different dialogs. How can I make it?
Thanks for your answer anyway.
stephane (Mechanical Ingineer, get starting with VC++, MFC)

Re: Get data into child control inside a simple Tab control

baerten5-Jul-07 1:30

baerten

5-Jul-07 1:30

// In your main dialog (where your Tab Control is) in OnInitDialog 
// write these simple lines to add your dialogs to Tab Panes.
   p1 = new CTabPageOne(); //p1 is a pointer to CTabPageOne (Dialog Box) 
   p1->Create(IDD_DIALOG_PAGE1,m_ctrlTAB.GetWindow(IDD_DIALOG_PAGE1));
   p2 = new CTabPageTwo(); //p1 is a pointer to CTabPageOne (Dialog Box) 
   p2->Create(IDD_DIALOG_PAGE2,m_ctrlTAB.GetWindow(IDD_DIALOG_PAGE2));

You have in your main dialog two pointers to your 2 tabs.
So you have a lot of possibilities to exchange data.

For example if you enter a text in a Textbox in Tab1, it should be also entered in Tab2 :
The Main Dialog has the pointers to the Tabs, and each Tab has a pointer to his parent (the Main Dialog)
Now you can make it like this :

CString str;
this->textbox1.GetWindowText(str);
Home->p2->SetValueIntoBox1(str);

where you have a function at tab 2 called CTabPageTwo::SetValueIntoBox1(CString val) which stores
the text into the textbox 1

You even can make a Data-structure which carries all the date to exchange ...

Good luck

Regards

Re: Get data into child control inside a simple Tab control

ndristephane5-Jul-07 1:40

ndristephane

5-Jul-07 1:40

Hi baerten!

Thanking you for your answer. I try right now.

Best Regards

stephane

New to VC++ and MFC

VishuABCDEFG4-Jul-07 23:17

VishuABCDEFG

4-Jul-07 23:17

Hello Guys,

i am Vishwanath Patil. i was previously worked on networking technologies SNMP. but now i am working on VC++ and MFC. so i am completely new to these technologies, so i want to learn about these technologies. so if any one who has some good books or sites where it will help for beginners then please replay me.

thanks,

Vishu,
Software Developer,
Target Corporation,
Bangalore.

Re: New to VC++ and MFC

Christian Graus4-Jul-07 23:27

Christian Graus

4-Jul-07 23:27

MFC is kind of dead compared to a few years ago ( not that it's absolutely dead, of course ). This is probably the best site to ask MFC questions. As far as books go, I'd think you'd find a lot of used books on ebay cheap, for the same reason.

Depending on your background ( do you already know C++ ? ), you may find that downloading MFC articles from this site and experimenting with them is a good place to start. If you don't know C++, learn C++ first, then learn MFC on top of that. What books are good for C++ depends again on your background. If this is your first language, I'd start slow with something like 'teach yourself C++ in 24 hours'. If you have a background in other languages, you may be able to jump right into 'The C++ programming language' by Bjarne Stroustrup.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: New to VC++ and MFC

VishuABCDEFG5-Jul-07 1:43

VishuABCDEFG

5-Jul-07 1:43

i know C++, i already did two projects using c++

Vishwa,
Software Developer
Target Corporation,
Bangalore

Re: New to VC++ and MFC

CPallini4-Jul-07 23:30

CPallini

4-Jul-07 23:30

There are a lot of good book about VC++/MFC programming, for instance, have a look at
Jeff Prosise's one [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: New to VC++ and MFC

Hamid_RT5-Jul-07 1:30

Hamid_RT

5-Jul-07 1:30

See www.cplusplus.com[^] does helpful for you.

WhiteSky

Re: New to VC++ and MFC

Kevin McFarlane5-Jul-07 2:35

Kevin McFarlane

5-Jul-07 2:35

There will be articles here on codeproject. But this site also looks good http://www.functionx.com/visualc/[^]. I've not tried it though.

Kevin

Re: New to VC++ and MFC

Joe Woodbury5-Jul-07 10:08

Joe Woodbury

5-Jul-07 10:08

Unfortunately, I can't remember the name of the best book I've read on MFC. It approached it by explaining HOW MFC works, not simply how to code to it. I found it very helpful to use the debugger to step into MFC classes and have been through about 90% of the MFC source.

Above all, experiment!

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: New to VC++ and MFC

DevMentor.org9-Jul-07 18:08

DevMentor.org

9-Jul-07 18:08

Dude I like your style of how you announced your name and presence ..who does that Big Grin | :-D

As for your question if you already know how to program using Win32 APIs then MFC will be a snap for you to pick up as most of the classes are wrappers around the primitive types.

If you don't know any Win32 programming then I suggest you understand the basic plumbing, and a good book for that is the Charles Petzold book Smile | :)

..Also whatever you do don't pick up one of those god awful big red wrox book, simply trash! I have an old MFC book by Jeff prosise on windows 95!!! Ha, if you can get your hand on a copy or a later release then it's definitely worth the read, excellent coverage of what you need to know about MFC from start to finish. Trust me when I say not much as changed since then...thanks to MS for leaving us C++ developers out in the cold while the C# .Net folks get all the cool libraries and we're still in the stone ages of having to write routines from scratch!!! Ahhh I want to cry man..... Cry | :((

See what you gone done now sonny, I am all bent out of shape trying to answer your question!!! Are you HAPPY now, Hugh, Mr. Vishwanath Patil .... Big Grin | :-D

ok me joke!

Is there any standard for returning values from a function?

Mushtaque Nizamani4-Jul-07 21:47

Mushtaque Nizamani

4-Jul-07 21:47

Hi,
Is there any standard for return values from a function, for example if my function returns only two value(true/false) then i would like to assign bool as its return value, but if i have got three values(0,1,2), then what data type should be the used as return value.

Best Regards,
Mushq

Mushtaque Ahmed Nizamani
Software Engineer
Ultimus Pakistan

"English is my second language, so please don't mind if i do some grammatical or spelling mistakes in my messages."

Re: Is there any standard for returning values from a function?

toxcct4-Jul-07 22:39

toxcct

4-Jul-07 22:39

you have plenty of types. if the function may return little integers, char is good enough. but short, int, long are possible choices.

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Is there any standard for returning values from a function?

CPallini4-Jul-07 23:12

CPallini

4-Jul-07 23:12

If the function may return only a small set of integers (such as {0,1,2}) then the enum type is a good choiche. Usually you can assign to each member of the set a meanigful name:

enum TrustLevel
{
  LOW = 0,
  AVERAGE,
  HIGH
};

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Is there any standard for returning values from a function?

Kenan Aksoy5-Jul-07 0:41

Kenan Aksoy

5-Jul-07 0:41

return int . so you can return up to 2 billion. Laugh | :laugh:

dlfkgj lsdfkglfkgjlfgl jldfk fldkk jk

Re: Is there any standard for returning values from a function?

Mark Salsbery5-Jul-07 8:22

Mark Salsbery

5-Jul-07 8:22

Kenan Aksoy wrote:
2 billion

That's all? What if you need more in the future? You have to think ahead, you know.

Roll eyes | :rolleyes:

Mark Salsbery
Microsoft MVP - Visual C++

"Go that way, really fast. If something gets in your way, turn."

Re: Is there any standard for returning values from a function?

CPallini5-Jul-07 9:30

CPallini

5-Jul-07 9:30

Actually 4 billions Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

load image in c++

rempit4-Jul-07 21:39

rempit

4-Jul-07 21:39

i'm new in programming c++. i only learn to use win32 console application..
i want to load, view an image(any jpg,bmp,gif) to my program. the picture will be view after i click some number and the picture will be assign to that number only..
i try to use 'swicth', but then i only manage to click number but don't know how to assign picture to that number.. Cry | :((

Re: load image in c++

Hamid_RT4-Jul-07 22:04

Hamid_RT

4-Jul-07 22:04

You can use of CImage class for load bmp,jpg,gif,png.

CImage m_Image;
m_Image.Load(your file);

WhiteSky

Re: load image in c++

rempit5-Jul-07 16:24

rempit

5-Jul-07 16:24

where should i put that code?
i've try to put in like this, but it get error.

<br />
void test(int z){<br />
       <br />
        CImage m_Image;<br />
<br />
	cout << "You have press " << z << endl ;<br />
	switch (z)<br />
	{<br />
	case 1 : cout << "Picture 1 is\n":<br />
                 m_Image.Load(pic1.jpg);<br />
<br />
		break;<br />
         .........<br />
         ....}<br />
         }<br />

is it the same as CxImage?

Re: load image in c++

Hamid_RT6-Jul-07 0:53

Hamid_RT

6-Jul-07 0:53

Whats the error? and not its not same with CXImage.

WhiteSky

Re: load image in c++

David Crow5-Jul-07 2:50

David Crow

5-Jul-07 2:50

Are you using MFC, or just the Win32 API? Is this a console or GUI appliocation?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: load image in c++

rempit5-Jul-07 15:20

rempit

5-Jul-07 15:20

just win32 API console application..

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.