C / C++ / MFC Discussion Boards

TClarke15-Jan-09 4:43

15-Jan-09 4:43

Hi All,

Is there a way of limiting the size of the margins when printing.
At present I can't think of a better way than subclassing the pring dialog box and intercepting text input to the margin size edit boxes.
The reason for this is that our test team have complained that if they put a huge number into the text margin boxes it messes up the appearance of the document and so should be prevented. Can you believe it D'Oh! | :doh:

Cheers
Tom

Philosophy: The art of never getting beyond the concept of life.
Religion: Morality taking credit for the work of luck.

Re: limiting print margins

Iain Clarke, Warrior Programmer15-Jan-09 5:17

Iain Clarke, Warrior Programmer

15-Jan-09 5:17

I've done a bit of digging, and neither PRINTDLG or PRINTDLGEX have a margins member.

So these margins you are talking about are app dependent, so we'd need to know more about the context.

If this is a custom print box, then start looking at the code there...

Iain.

ps, Good surname...

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: limiting print margins

TClarke15-Jan-09 5:48

TClarke

15-Jan-09 5:48

Hi Iain,

The actual dlg box in question can be seen in IE. If you click on print preview, the window that comes up has a button which fires up a page setup dialog box. It is on this that the margins can be altered. Sorry for the lack of clarity.

ps. Best damn surname there is...

Cheers
Tom

Philosophy: The art of never getting beyond the concept of life.
Religion: Morality taking credit for the work of luck.

Re: limiting print margins

Rajkumar R15-Jan-09 7:16

Rajkumar R

15-Jan-09 7:16

If you are discussing about the page Setup dialog that you use in your own application, i also think so, you may need to subclass the dialog.

First of all, obviously, if the margins are overbound it messes up, that is known to the user, do you need to correct it?

If you want to disable the margin fields, simply use PSD_DISABLEMARGINS flags in [PageSetupDlg Function^].

Or you can validate the margin data entry, by subclassing it. That is setting the hook procedure.

PAGESETUPDLG psd;    // common dialog box structure
		// Initialize PAGESETUPDLG
	ZeroMemory(&psd, sizeof(psd));
	psd.lStructSize = sizeof(psd);
	psd.hwndOwner   = 
        ....
	psd.Flags       = PSD_INTHOUSANDTHSOFINCHES | PSD_MARGINS | 
		<code>PSD_ENABLEPAGESETUPHOOK</code>;
	psd.lpfnPageSetupHook = (LPPAGESETUPHOOK)PageSetupHook;

	if (PageSetupDlg(&psd)==TRUE) {

And in the hook procedure you can validate the text entry,

BOOL CALLBACK PageSetupHook(HWND hwndDlg, UINT uMsg, WPARAM wParam,
    LPARAM lParam) 
{ 
	
   switch (uMsg)
	{
	case WM_INITDIALOG:
		return (INT_PTR)TRUE;

	case WM_COMMAND:
		if ((LOWORD(wParam) == 1155 // ID of LEFT MARGIN EDIT CTRL (from PrnSetup.Dlg)
			&& HIWORD(wParam) == EN_CHANGE)
		{ 
                      // write the validation code

You can completely customise the page setup dialog with your own dialog by create a dialog template resource by modifying the default template available in VC\PlatformSDK\Include\PrnSetup.Dlg by specifying the flags,

psd.Flags       = PSD_INTHOUSANDTHSOFINCHES | PSD_MARGINS | 
		PSD_ENABLEPAGESETUPHOOK | <code>PSD_ENABLEPAGESETUPTEMPLATE</code>; 
	....
	psd.lpPageSetupTemplateName = MAKEINTRESOURCE(IDD_PAGESETUP); // your dialog template 
	psd.lpfnPageSetupHook = (LPPAGESETUPHOOK)PageSetupHook;
        psd.hInstance = hInstance;

see also [Customizing the Page Setup Dialog Box^]

Re: limiting print margins [modified]

TClarke15-Jan-09 23:14

TClarke

15-Jan-09 23:14

Thank you so much Rajkumar,

First of all, to respond to your comment:

"First of all, obviously, if the margins are overbound it messes up, that is known to the user, do you need to correct it?"

I couldn't agree more. It's another completely ridiculous example user madness. Unfortunately, my inclination to tell the user not to set stupid values has been overruled in this case, so here I am.

My position is that the page setup dialog box is launched from IE. Therefore, I can either subclass IE's window or I can create my own one and replace the existing dialog box.
Is there any way of applying the approach you showed me to an existing Page Setup dialog box owned by IE. I’m working from an ActiveX control running in IE?

Many thanks

Cheers
Tom

Philosophy: The art of never getting beyond the concept of life.
Religion: Morality taking credit for the work of luck.

modified on Friday, January 16, 2009 5:33 AM

WM5 dev, Problem with C++ FindFirstFile returning 0xffffffff

uzziah015-Jan-09 3:48

uzziah0

15-Jan-09 3:48

I am having a problem with FindFirstFile, I am writing for WM5 with Visual Studio 2008 90 day trial.

Here is a chunk of code:

int GetTheFile(LPWSTR ddir)
{
  LPWIN32_FIND_DATAW ac_file;
  HANDLE fileHandle;
  int ret=1;

  wsprintf(ddir, TEXT("\\*.*"));
  fileHandle = FindFirstFile(ddir, ac_file);
  if (fileHandle != INVALID_HANDLE_VALUE)

After the FindFirstFile executes, ac_file is unchanged (all 0s),
fileHandle is 0xffffffff (-1 which is invalid handle),
I have tried several different things for ddir ("\\", "\\*.*", "\\Windows",...).

Any ideas?
Thanks

Re: WM5 dev, Problem with C++ FindFirstFile returning 0xffffffff

Randor 15-Jan-09 4:20

Randor

15-Jan-09 4:20

There are several problems with your code:

This is a pointer to a WIN32_FIND_DATAW struct in which you never initialize and point to a valid location.

LPWIN32_FIND_DATAW ac_file;

It would be better to be more precise about what drive you wish to access such as "C:\\*.*"

wsprintf(ddir, TEXT("\\*.*"));

See if this works for you:

WIN32_FIND_DATAW ac_file = {0};
HANDLE fileHandle =0;
wsprintf(ddir, TEXT("C:\\*.*"));
fileHandle = FindFirstFile(ddir, &ac_file);
if (fileHandle != INVALID_HANDLE_VALUE)
{
	//...
}

Best Wishes,
-David Delaune

Re: WM5 dev, Problem with C++ FindFirstFile returning 0xffffffff

uzziah015-Jan-09 4:46

uzziah0

15-Jan-09 4:46

I guess I didn't notice that LPWIN32_FIND_DATAW is just a pointer. I was getting a warning that I looked at and just thought "of course its not initialized, it will get a value from FindFirstFile".
So, I'll change that!

This is for a Window Mobile device, so there is no C: drive, it is just \\. Then if you want a memory card, you would enter \\<<i>name of card> like mine is \\SD Card.

I was searching for a file in a particular directory, but the file can have some parts slightly different, here is what I got working to find my file:

int GetTheFile(LPWSTR lpszDir)
{
    LPWIN32_FIND_DATAW ac_file;
    _WIN32_FIND_DATAW the_dir[MAX_PATH];
    HANDLE fileHandle;
    int ret=1;

    ac_file = the_dir;
    wsprintf(lpszDir, TEXT("\\My Documents\\first*.txt"));
    fileHandle = FindFirstFileW(lpszDir, ac_file);
    if (fileHandle != INVALID_HANDLE_VALUE)

For some reason I could not get the types to work correctly for making ac_file like you suggested, but I got it to work like this, and I can tinker with it now.
This will look for a file in \My Documents named first<something>.txt, like \My Document\first-1209.txt

Thanks for helping me figure this out Dave Smile | :)

.

Ken

Access Database: Create Table

SutterA15-Jan-09 3:14

SutterA

15-Jan-09 3:14

Hello everybody,

I have a question once again.

The program I wrote is connected to a Microsoft Access Database, so far this all works fine. My problem is, that I want to write a function that can control whether a specific table is existing in the database and if not the table gets created automatically.

Is there a way to do this with MFC based C++ code?

Greetings

Re: Access Database: Create Table

David Crow15-Jan-09 4:20

David Crow

15-Jan-09 4:20

Member 3554668 wrote:
...the table gets created automatically.

Use CDatabase::ExecuteSQL("CREATE TABLE...").

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

windows Loader

Member 342050915-Jan-09 1:44

Member 3420509

15-Jan-09 1:44

I want to know how windows loader loads the executables and what are the checks are perfomed by loader,
can anyone tell me where can i find the good article about this.

Re: windows Loader

Iain Clarke, Warrior Programmer15-Jan-09 2:04

Iain Clarke, Warrior Programmer

15-Jan-09 2:04

It's quite a big question you've asked!

I did a search for "msdn pe loader", and first few entries all look quite useful (OK, not all)

http://msdn.microsoft.com/en-us/library/ms809762.aspx[^]
http://msdn.microsoft.com/en-us/magazine/cc301805.aspx[^]

Both by Matt Pietrek, as it happens.

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: windows Loader

Naveen15-Jan-09 2:07

Naveen

15-Jan-09 2:07

Member 3420509 wrote:
can anyone tell me where can i find the good article about this.

Yep. Check Under the hood by Matt Pietrek[^]

nave

[OpenedFileFinder] [My Blog]

Can i fix the size of splitted view?

Le@rner15-Jan-09 1:29

Le@rner

15-Jan-09 1:29

Hi all,

i have SDI type application, i m split it in i row and 2 columns.initially its have size that is i given.

but with help of mouse i m resizing it.

i want to prevent resizing spiltted view.

i want fix the width for both view that is initially i have already mentioned.

please tell me how can i do this.

i waiting for your valuable suggestion and answers.

thanks in advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Can i fix the size of splitted view?

SandipG 15-Jan-09 1:40

SandipG

15-Jan-09 1:40

Check this[^]
I hope it helps..

Regards,
Sandip.

Re: Can i fix the size of splitted view?

Le@rner15-Jan-09 1:52

Le@rner

15-Jan-09 1:52

Thanks its done

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Suggestions: need an Outlook 2003 style of navigation class

josip cagalj15-Jan-09 0:28

josip cagalj

15-Jan-09 0:28

Hi, if it wouldn't be a great trouble could anyone direct/suggest me to an article of how to add an navigation pane positioned on the left side like an Outlook 2003. I need to use it as a shortcut bar.
I would switch the views on the right side depending on user selection.
Thanks in advance!
Here at CP I found something similar ("OutlookBar: A Simplified Outlook Style Sidebar Control" ) but for .Net, I need to use it with VC6 MFC.

Re: Suggestions: need an Outlook 2003 style of navigation class

Code-o-mat15-Jan-09 5:58

Code-o-mat

15-Jan-09 5:58

Could this[^] be it?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: Suggestions: need an Outlook 2003 style of navigation class

josip cagalj15-Jan-09 21:20

josip cagalj

15-Jan-09 21:20

Thanks for your suggestion. Of course it helped me, interesting stuff.

how to hide internal component of a class

pedefetoll15-Jan-09 0:23

pedefetoll

15-Jan-09 0:23

Hello.
I build a class, using internaly a component. But I want that the user of the class never knows which type of component it is.
for exemple :
the include file class.h :

#include <windows.h>
#include <classComponent.h>

class MyClass {
private:
classComponent _Component;
public:
MyClass();
Log( string Message);
};
=======================
If a user of my class includes the file class.h, he need to "access" to classComponent.h in it's compiler directive. But He realy only need the library of the component (classComponent.dll) and not the include, because it is MyClass which process access to functions of classComponent..
How can I "mask" the dependendancies on classComponent for the final user ?

Best regards.

Re: how to hide internal component of a class

sashoalm15-Jan-09 0:34

sashoalm

15-Jan-09 0:34

Use a void* to access the hidden classComponent object.

in class.h:

class MyClass {
    void* p;
public:
    MyClass();
    ~MyClass();
    void DoStuff();
};

in class.cpp

MyClass::MyClass()
{
	p = (void*) new classComponent;
}

MyClass::~MyClass()
{
	classComponent* p2 = (classComponent*) p;
	delete p2;
}

void MyClass::DoStuff()
{
	classComponent* p2 = (classComponent*) p;
	p2->DoStuff();
}

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: how to hide internal component of a class

Cedric Moonen15-Jan-09 0:51

Cedric Moonen

15-Jan-09 0:51

That's really ugly...

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: how to hide internal component of a class

Stephen Hewitt15-Jan-09 2:29

Stephen Hewitt

15-Jan-09 2:29

The whole void* and casting stuff isn't needed. Use a forward reference to the classComponent class instead.

In "Class.h":

class classComponent; // Forward reference to implementation class.
 
class MyClass
{
public:
    MyClass();
    ~MyClass();
    void DoStuff();
 
private:
    classComponent *m_pThis;
};

In "Class.cpp":

#include "classComponent.h" // Include header of implementation class here.
 
MyClass::MyClass()
{
	m_pThis = new classComponent;
}
 
MyClass::~MyClass()
{
	delete m_pThis;
}
 
void MyClass::DoStuff()
{
	m_pThis->DoStuff();
}

This pattern is often called the Pimpl idiom[^].

Steve

Re: how to hide internal component of a class

sashoalm15-Jan-09 2:59

sashoalm

15-Jan-09 2:59

The OP said:
I build a class, using internaly a component. But I want that the user of the class never knows which type of component it is.

Sorry, I was under the impression from his wording that he wanted not just to remove the dependency from his include file but also to hide the fact that he's using a certain component from users of his code (some sort of code obfuscation).

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: how to hide internal component of a class

Stephen Hewitt15-Jan-09 3:06

Stephen Hewitt

15-Jan-09 3:06

I take your point, however, if all the client gets is a forward reference not much is really being given away.

Steve

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