Re: Printing large BMP file - C / C++ / MFC Discussion Boards

How compiler will determine the parent in virtual derivation

Ranjish11-Feb-05 2:18

11-Feb-05 2:18

I have a base class A. I have derived two classes B & C from A virtually. After that I have derived Class D from B and C. Class have a function fun().
I have created One object of D say obj and when I call obj.fun() it will call fun() of A.
Till now everything is fine.

But what is wondering me is how compiler knows weather fun() is coming to D through B or C as both have one copy of fun() and D also will have only one.

Re: How compiler will determine the parent in virtual derivation

Michael Dunn11-Feb-05 5:13

Michael Dunn

11-Feb-05 5:13

If I understand, your classes are like this?

class A { public: fun() { } };
class B : virtual public A { };
class C : virtual public A { };
class D : public B, public C { };
 
D obj;
obj.fun();

There is no ambiguity there because there is only one method called fun(). When you write obj.fun(), the compiler searches the inheritance tree for something called fun() and finds it in class A. Classes don't have "copies" of functions, the search for non-virtual methods is done at compile time.

--Mike--
LINKS~! Ericahist updated! | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ
Strange things are afoot at the U+004B U+20DD

MDI w/o initial window

Temuri11-Feb-05 2:01

Temuri

11-Feb-05 2:01

Is there any way to prevent MDI application from creating the initial child window?

Re: MDI w/o initial window

David Crow11-Feb-05 2:54

David Crow

11-Feb-05 2:54

Yes. See MSDN article Q141725.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Thanks!!

Temuri11-Feb-05 3:00

Temuri

11-Feb-05 3:00

That really help!!!

Actual code is

BOOL CMyWinApp::InitInstance()<br />
    {<br />
    ...<br />
<br />
    // Parse command line for standard shell commands, DDE, file open<br />
    CCommandLineInfo cmdInfo;<br />
    ParseCommandLine(cmdInfo);<br />
<br />
    // Don't display a new MDI child window during startup<br />
    if (cmdInfo.m_nShellCommand == CCommandLineInfo::FileNew)<br />
      cmdInfo.m_nShellCommand = CCommandLineInfo::FileNothing;<br />
<br />
    // Dispatch commands specified on the command line<br />
    if (!ProcessShellCommand(cmdInfo))<br />
        return FALSE;<br />
<br />
    ...<br />
    }

Printing large BMP file

Vinaya11-Feb-05 1:39

Vinaya

11-Feb-05 1:39

Hi,

I have created an application which combines 3 bmp files and sends the raw data to the printer for printing. In a 600 dpi printer the data send from the application is large. I am using BitBlt() function to send the data to the printer. Can anyone help me in this?

How to reduce the printer buffer size? Is there any other format to send data to the printer.

Kindly help.

Thanks.. Smile | :)

Vini

Re: Printing large BMP file

Roger Allen11-Feb-05 5:44

Roger Allen

11-Feb-05 5:44

Just a note. BitBlt may not be supported by all printer drivers, so you may find that your code works for one and not another printer. You should converts any bitmap to a DIB and use StretchDIBits() to output pictures in theis way. Take a look at my "Printing tips and tricks" artile in the printing section. It gives example code to do the conversion.

To your question: Does it really matter what output size the printer file is before sending it to the printer?

If you vote me down, my score will only get lower

Re: Printing large BMP file

Vinaya13-Feb-05 18:01

Vinaya

13-Feb-05 18:01

Thanks.
Roger Allen wrote:
To your question: Does it really matter what output size the printer file is before sending it to the printer?

I see that the amount of print data send to my printer is over 163MB. And when I try to print a 'pdf' file, around 400MB data is send. How can we reduce this? Kindly help

~Thanks

Vini

VC++7 Char set ????

racing5711-Feb-05 0:28

racing57

11-Feb-05 0:28

I have to convert a command to be sent to a piece of hardware from hex to char... i've done this in the following way and it works in vc++6 but not in vc++7 ?? it compiles fine in both but the command is different... anyone got any ideas why ??

CString csTrigger

csTrigger.Format("%c%c%c%c%c%c",0xFC,0x06,0xC3,0x00,0x04,0xD6);<br />

any ideas would be appreciated..

Regards

Re: VC++7 Char set ????

RChin11-Feb-05 0:52

RChin

11-Feb-05 0:52

If I understood you correctly, you want to display the given hex digits as a string representation. If this is the case then you need to use the %X format.

<code>csTrigger.Format("%X%X%X%X%X%X",0xFC,0x06,0xC3,0x00,0x04,0xD6);
</code>

Why your sample code would change behaviour on VC6/7 I haven't got a clue! Confused | :confused:

I Dream of Absolute Zero

Re: VC++7 Char set ????

racing5711-Feb-05 1:00

racing57

11-Feb-05 1:00

Thanks for responding... i need to use the %c to build up a string of characters from the hex values. like i say it builds in both but the conversion is different... i have tried checking the char sets etc but cannot find what is wrong. if you build a very basic project in both and put the line of code in both and step thru it, if you check the contents of the string you will see the differnce ?????

Frown | :(

Re: VC++7 Char set ????

RChin11-Feb-05 1:17

RChin

11-Feb-05 1:17

I'm puzzled because I have tried it (on VC6 and VC7.1) and they both behave as expected (displays 'üÃ').

Remember that the character string you are trying to build consist of these ASCII value: 0xFC,0x06,0xC3,0x00,0x04,0xD6. This equates to:

ASCII: 252, 6, 195, 0, 4, 214

First off, all of these ascii values does not map to 'regular' characters. 0x6 and 0x4 are non printable characters, and 0 is the null terminating character, so your string will stop at 0x00, resulting in the three letter output I gave above.

Unless you've done something else in your code, this is how it should execute. What is the output on your VC6 compilation?

I Dream of Absolute Zero

Crystal Reports

shiraztk10-Feb-05 23:47

shiraztk

10-Feb-05 23:47

Hi all

I am using cr 10 for showing some reports saved as rpt files. I change the database connection at runtime.

Everything works fine.
But when the report window is opened (this is another window, a modelless) and if the export button is selected, my application remains running on the task manager.
And this happens only on widnows 2000.
All the Crystal report objects are made inside a function and shown on the OnInitDialog of the report window.
I included the craxdrt.h and created

FunctionCalledFromOnInitDailog()
{
IApplication app;
app.CreateDispatch(_T("CrystalRuntime.Application"),NULL)

//I do the rest of the things here, set the datasource of the viewer
//control etc

m_cysApp.DetachDispatch();
}

Any idea whats going on ?
Please help me.

Regards
Shiraz

The Best Relligion is Science.
Once you understand it, you will know God.

Downgrade a VC++7.0 to VC++6.0

the.freerider10-Feb-05 23:39

the.freerider

10-Feb-05 23:39

Hello

I wonder if there is tutorial/faq/info about how to downgrade a VC++7.0 solution to a VC++6.0 project?

thank you in advance
/Lucian

Re: Downgrade a VC++7.0 to VC++6.0

Vinaya11-Feb-05 0:13

Vinaya

11-Feb-05 0:13

Check this Code Project link http://www.codeproject.com/tools/prjconverter.asp[^]

~Enjoy

Vini

Diferrences between open a file and double clicking a file

doctorpi10-Feb-05 23:38

doctorpi

10-Feb-05 23:38

Hi guys
I've developed a Doc-view app.
My documents have an extension (.mqw)
If I open my app and drag and drop a .mqw file inside it opens correctly.
If I use Open inside my app, the file opens correctly too.
But if I double click in a .mqw file my app give me an unhandled exception
I've already associated the .mqw files to my app.exe
What is the difference between these procedures to give me an error when I doubleclick my .mqw files?
Thanks in forwarding
Doc

Re: Diferrences between open a file and double clicking a file

Anonymous10-Feb-05 23:55

Anonymous

10-Feb-05 23:55

I think that the differences are that you have not implemented the command-line option for the program. When you double-click the file windows does this:

exec <your program="">.exe <file_path>

implement a function that parses the commmand-line options ( remenber the argv and argc in int main(int argc, char* argv?)

Re: Diferrences between open a file and double clicking a file

Neville Franks11-Feb-05 0:51

Neville Franks

11-Feb-05 0:51

Double click in Explorer uses DDE if your app is already running and you've registered your extension. Have a look at the DDE handler CDocManager::OnDDECommand() which will call your CYourApp::OpenDocumentFile( LPCTSTR lpszFileName ).

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

BS_SETIMAGE

toxcct10-Feb-05 23:31

toxcct

10-Feb-05 23:31

hello everybody,

i use the following code :

HICON hIcon = LoadIcon(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDI_PREVIEW));
CButton* pButton = (CButton*)GetDlgItem(IDC_PREVIEWFACT_BTN);
pButton->SendMessage(BM_SETIMAGE, (WPARAM)IMAGE_ICON, (LPARAM)hIcon);

this code is supposed to set the IDC_PREVIEWFACT_BTN button face with the IDI_PREVIEW icon.
the icon is 16x16 pixels, and the button is bigger (in pixels) than my icon (i cannot say how wuch, because the resource editor don't "speak" in pxls).

my problem is that the ison displays quite "well", except the fact that is is much bigger than the button (so truncated).

does anyone know how to display the icon to its real size ?

thanks in advance...

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

Unable to debug on web-server error ASP.NET

vgrigor110-Feb-05 22:03

vgrigor1

10-Feb-05 22:03

Unable to debug on web-server - error

I installed .NET 2.0,
and
"Unable to debug on web-server error"
begin to appear when I tru to dubug program with VS2003.

What is the reasons ?
How to correct ?

thanks

How to make any DialogBox as a child of CMainFrm in an MDI App?

Anonymous10-Feb-05 19:39

Anonymous

10-Feb-05 19:39

In my MDI Application, I have two child frames. I have one dialog Box inherited from CInitDialogBar class. Now, how to integrate this DialogBox with my MainFrm class? I want to toggle between these two child frames and
dialogBox. I have command handler for it, but data stops refreshing when ever i toggle from DialogBox to any of child frame.Otherwise everything is working.

Re: How to make any DialogBox as a child of CMainFrm in an MDI App?

rocky_pulley11-Feb-05 0:31

rocky_pulley

11-Feb-05 0:31

You may want to look into using CFormView, it's a view that's based on a dialog box.

-- Rocky Dean Pulley

Re: How to make any DialogBox as a child of CMainFrm in an MDI App?

Anonymous11-Feb-05 1:13

Anonymous

11-Feb-05 1:13

I am not using CFormView in my code.....though i have

class CWINVIEWSView : public CView in WINVIEWSView.cpp.
What kind of code i have to write? Confused | :confused:

GET RESOURCES

kedar.dave10-Feb-05 19:19

kedar.dave

10-Feb-05 19:19

hiiii....

i want to enumerate all the resources of a particular application....for eg. a Calculator..

how can i do it ?

regards,

kedar.

Re: GET RESOURCES

ThatsAlok10-Feb-05 19:42

ThatsAlok

10-Feb-05 19:42

Please look at this article in your local copy of MSDN

Article Path

In Content view->
 Plateform SDK Documentation->User Interface Service
 ->Window User Interface->Resources->Using Resources

there you will find a article -> Creating a Resource List.

"I Think this Will Help"
<h5
alok gupta="" <br=""> visit me at http://www.thisisalok.tk

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