Re: unresolved external symbol - C / C++ / MFC Discussion Boards

gabbana14-Jul-08 11:01

14-Jul-08 11:01

Hello,

i am wondering if vc++ also understands jpeg resources or only bitmaps ? It would be very nice if i can use jpegs for design elements.

Or another question: how can i build something like this:

http://cdn.last.fm/depth/screenshots/de/software_win.jpg[^]

(the left bar with the small image and the menue and the light blue bar in the mid (look at "Saalschutz")

Thanks for help.

Re: Design Question: Only Bitmap or JPEG ?

Mark Salsbery14-Jul-08 13:40

Mark Salsbery

14-Jul-08 13:40

gabbana wrote:
i am wondering if vc++ also understands jpeg resources

GDI's LoadImage() function and GDI+'s Bitmap::FromResource() method both
load embedded JPEG BITMAP resources no problem. GIF too.

On VS2008:
(optional) copy JPEG and/or GIF file to the project's "res" folder
Right-click the project's resource (.rc) file in VS resource view
Choose "Add Resource"
Click "Import..."
Find the JPEG and/or GIF files, select them, and click "Open"
Save the project and reopen the project's .rc file in the text editor
Find the images you've embedded and change the types from "GIF"/"JPG" to "BITMAP"
The line(s) should look something like:

IDB_JPEG1     BITMAP          "res\\some.JPG"
IDB_GIF1      BITMAP          "res\\some.GIF"

Now you can use the above mentioned methods to work with the embedded bitmaps,
just like a bmp.

An alternative method using IStream/IPicture:
Load JPEG and (transparant) GIF picture files from a resource in 3 lines code[^]
Loading JPEG and GIF pictures[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Design Question: Only Bitmap or JPEG ?

Nelek14-Jul-08 21:16

Nelek

14-Jul-08 21:16

On the design of the window you can make use of Splitters. About the Saalschutz and the blue background I guess it is a kind of progress bar. You may find a lot of info here in the CP. Take a look into that concepts if they help you.

Regards.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson
Rating helpfull answers is nice, but saying thanks can be even nicer.

Re: Design Question: Only Bitmap or JPEG ?

gabbana16-Jul-08 4:37

gabbana

16-Jul-08 4:37

okay, thanks.

do you know a good tutorial for creating a complete own gui with win32 ? So i mean owner drawn windows with my own close buttons and so on ?

i tried searching "skins" on cp but i only find apis which are easy to use but complicated to understand in the technic.

Re: Design Question: Only Bitmap or JPEG ?

Nelek20-Jul-08 23:36

Nelek

20-Jul-08 23:36

I am not sure what you are asking for, but actually the VC has lot of functionality and there are a lot of owner draw controls in the CP, the thing is you have to limit the search to what you need API, MFC and so on.

If you want to create your own GUI, I recommend you to make different test projects, trying one different thing in each one, and when you get what you want in every of them, then put all together.

When you have more questions just ask, there will be many people glad to help you if the question wakes up their curiosity or the question is well formulated.

Sorry, but about the manual... there are so many factors involve that I can not give you a concrete answer

Regards.
--------
M.D.V. Wink | ;)

CFrameWnd *without* a view [modified]

[d3m0n]14-Jul-08 10:24

[d3m0n]

14-Jul-08 10:24

Hi I'm trying out the new features of the new VS2008 MFC Feature Pack (TR1). Managed to make a really nice looking application using 4 or 5 different CDockablePanes. All my views are now in their own pane, and the docking works really well.

Trouble is, there's a redundant CView lingering about which I a) don't have any use for, and b) don't know how to get rid of.

I tried various ways of resizing the top-level CPaneContainer using the SetPaneSize sample provided with the feature pack, which I implemented in CMainFrame::OnSize. This does work but it kinda breaks the dockable pane functionality - i.e. you can dock panes to the almost-visible CView and the whole thing screws up.

Is there an easy way to get the benefits of CFrameWnd, and get rid of CView altogether? Whilst keeping the CDockablePane functionality.

----
Edit:
Or alternatively is there a way to prevent panes from being docked onto the CView?
----

Thanks
[d3m0n]

P.S. MSDN's Feature Pack documentation is abysmal Mad | :mad:

. You get more sense from stepping into the code and having a look around to see what you can call.

Cheers
[d3m0n]

Email (replace "***" with "key")

modified on Monday, July 14, 2008 4:50 PM

unresolved external symbol

AndreFratelli14-Jul-08 10:03

AndreFratelli

14-Jul-08 10:03

I there

This is a bit strange... I had a project (VS 2005 Pro) with all the code written in the header (.h) files. This is an OO project, so I had the class definitions and method implementations on the same file. Then, I separated the files, definition in headers, implementation in code files. But now I get 7 unresolved external symbols and the project won't compile. The strange thing is that before the separation all was normal.

What do you guys think it can be?

Best regards

Fratelli

Re: unresolved external symbol

led mike14-Jul-08 12:15

led mike

14-Jul-08 12:15

AndreFratelli wrote:
What do you guys think it can be?

Nothing special, just plain old coding errors. Not sure what you are asking, I mean you did not post any error messages with the related code so I don't know what you think we can do it about it short of re-writing all the C++ documentation that already exists which wouldn't make any sense since you have already proven you don't read it.

led mike

Re: unresolved external symbol

AndreFratelli14-Jul-08 20:02

AndreFratelli

14-Jul-08 20:02

led mike wrote:
I don't know what you think we can do it about it short of re-writing all the C++ documentation that already exists which wouldn't make any sense since you have already proven you don't read it.

You don't even have a reason to think that. I get unresolved external symbols only after separating the code into files... Wouldn't it be reasonable it would work just as well? Before, I had this:

// file whatever.h

#ifndef __WHATEVER_H
#define __WHATEVER_H
class Whatever
{
 void method();
};

void Whatever::method()
{
}
#endif

Now I have this:

// file whatever.h

#ifndef __WHATEVER_H
#define __WHATEVER_H
class Whatever
{
 void method();
};
#endif

// file whatever.cpp

#include "whatever.h"

void Whatever::method()
{
}

And I get these:

caminho.obj : error LNK2019: unresolved external symbol "public: bool __thiscall Capacidade::reserva(class Fluxo)" (?reserva@Capacidade@@QAE_NVFluxo@@@Z) referenced in function "public: bool __thiscall Caminho::ligar(void)" (?ligar@Caminho@@QAE_NXZ)
caminho.obj : error LNK2019: unresolved external symbol "public: bool __thiscall Capacidade::liberta(class Fluxo)" (?liberta@Capacidade@@QAE_NVFluxo@@@Z) referenced in function "public: void __thiscall Caminho::desligar(void)" (?desligar@Caminho@@QAEXXZ)
caminho.obj : error LNK2019: unresolved external symbol "public: unsigned int __thiscall Capacidade::suporta(class Fluxo)const " (?suporta@Capacidade@@QBEIVFluxo@@@Z) referenced in function "public: bool __thiscall Caminho::ping(void)const " (?ping@Caminho@@QBE_NXZ)
grafo.obj : error LNK2019: unresolved external symbol "public: unsigned int const __thiscall No::id(void)const " (?id@No@@QBE?BIXZ) referenced in function "public: bool __thiscall Grafo::ligados(unsigned int,unsigned int)const " (?ligados@Grafo@@QBE_NII@Z)
grafo.obj : error LNK2019: unresolved external symbol "public: class No * __thiscall Ligacao::destino(void)const " (?destino@Ligacao@@QBEPAVNo@@XZ) referenced in function "public: bool __thiscall Grafo::ligados(unsigned int,unsigned int)const " (?ligados@Grafo@@QBE_NII@Z)
grafo.obj : error LNK2019: unresolved external symbol "public: unsigned int __thiscall Capacidade::custo(class Fluxo)const " (?custo@Capacidade@@QBEIVFluxo@@@Z) referenced in function "public: class Caminho __thiscall Grafo::dijkstra(unsigned int,unsigned int,class Fluxo)const " (?dijkstra@Grafo@@QBE?AVCaminho@@IIVFluxo@@@Z)
grafo.obj : error LNK2019: unresolved external symbol "public: class Capacidade * __thiscall Ligacao::capacidade(void)const " (?capacidade@Ligacao@@QBEPAVCapacidade@@XZ) referenced in function "public: class Caminho __thiscall Grafo::dijkstra(unsigned int,unsigned int,class Fluxo)const " (?dijkstra@Grafo@@QBE?AVCaminho@@IIVFluxo@@@Z)
E:\Projects\netsim\Debug\netsim.exe : fatal error LNK1120: 7 unresolved externals

I didn't include the error messages because I didn't think they would help. What I was looking for (and still am) were the kind of coding errors that would cause this, cause I really can't find what's wrong here.

I bet it will be one of those things that, when you find out what it is, you just fill like smashing the computer Laugh | :laugh:

regards

Fratelli

Re: unresolved external symbol

Stephen Hewitt14-Jul-08 14:43

Stephen Hewitt

14-Jul-08 14:43

AndreFratelli wrote:
I there

I'm sure you are.

As for your coding problems it would be helpful if you included the error messages.

Steve

Re: unresolved external symbol

AndreFratelli14-Jul-08 20:25

AndreFratelli

14-Jul-08 20:25

Stephen Hewitt wrote:
As for your coding problems it would be helpful if you included the error messages.

Done that =)

I already figured out what it is. I started searching what did the unresolved names add in common and notice they were all marked as inline! Removed the "inline" keyword every in the project.. and it works! Can anybody explain this? How can I solve it?

regards

Fratelli

Re: unresolved external symbol

Stephen Hewitt14-Jul-08 20:30

Stephen Hewitt

14-Jul-08 20:30

That will work. Can you post your actual code: the names in the error messages don't match up to code you posted.

Steve

Re: unresolved external symbol

AndreFratelli15-Jul-08 4:26

AndreFratelli

15-Jul-08 4:26

The code is kind of large for me to post it here =/ The errors refer many files and functions... Is there a way for me to post the entire source here?

regards

Fratelli

Re: unresolved external symbol

Alan Balkany15-Jul-08 4:21

Alan Balkany

15-Jul-08 4:21

I think the code for inline functions must appear in your header file; you can't have just the declaration. It's similar to a macro.

Re: unresolved external symbol

AndreFratelli15-Jul-08 4:29

AndreFratelli

15-Jul-08 4:29

I know that for templates, but with plain inline functions too? =/ Never happened to me before... Is this a VS thing?

regards

Fratelli

Cfile write problem [modified]

aei_totten14-Jul-08 8:24

aei_totten

14-Jul-08 8:24

I am trying to write out an array and all I am getting is junk in the file.

Here's the code:

short frameData[3648];
short *p;
file.Open( "C:\\test.txt",  CFile::modeCreate|CFile:: modeReadWrite);
p = (short *)Frameptr;
for ( int i=0; i<= 3647; i++)
{
    frameData[i] = *p;
    p++;
}
//write out data
file.Write(frameData,sizeof(short)*3647);
file.Close();

modified on Monday, July 14, 2008 2:34 PM

Re: Cfile write problem

David Crow14-Jul-08 8:30

David Crow

14-Jul-08 8:30

aei_totten wrote:
...all I am getting is junk in the file.

How are you verifying this? What should be in the file?

"Love people and use things, not love things and use people." - Unknown

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

Re: Cfile write problem

aei_totten14-Jul-08 8:34

aei_totten

14-Jul-08 8:34

I open the file and there are a bunch of weird chars, boxes, greek letters, etc. and the data is an array of numbers in the 646-780 range. I step through with the debugger and the array is populated fine.

Re: Cfile write problem

Cedric Moonen14-Jul-08 8:36

Cedric Moonen

14-Jul-08 8:36

Well, you asked to write the array as a binary format into the file, so each short from your array will be writte as two bytes in the file (thus resulting in garbage characters). You first have to convert each short into a string and write that string into the file.

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

Re: Cfile write problem

aei_totten14-Jul-08 8:45

aei_totten

14-Jul-08 8:45

Thanks that was it, duh.

Re: Cfile write problem

led mike14-Jul-08 8:57

led mike

14-Jul-08 8:57

aei_totten wrote:
Thanks that was it, duh.

Yeah, imagine that! The file had in it what you told the computer to put in it! Wow, what will they think of next?

led mike

Re: Cfile write problem

Mark Salsbery14-Jul-08 9:29

Mark Salsbery

14-Jul-08 9:29

led mike wrote:
Wow, what will they think of next?

This![^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Cfile write problem

led mike14-Jul-08 9:54

led mike

14-Jul-08 9:54

Sure but I like to pronounce that Shamoo Wink | ;)

Have you tried one? Does it really work? Or is it a misinfomercial? Laugh | :laugh:

led mike

Re: Cfile write problem

Mark Salsbery14-Jul-08 9:57

Mark Salsbery

14-Jul-08 9:57

led mike wrote:
Does it really work?

Works great on the commercial! I haven't tried one though.

German technology - it HAS to be good!

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Cfile write problem

led mike14-Jul-08 11:16

led mike

14-Jul-08 11:16

Mark Salsbery wrote:
German technology - it HAS to be good!

Yep[^]

Two and a half years ago, the bursting of the dot-com bubble erased most of the market value of Germany's technology sector. Now, the market itself is being scrapped.

Deutsche Börse, which runs the Frankfurt stock exchange, announced today that it would close the Neuer Markt -- the technology-related market that is Germany's answer to the Nasdaq -- by the end of 2003.

led mike

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