Modifying the window list and/or Ctrl+Tab behaviour in an MDI app - C / C++ / MFC Discussion Boards

Detect Current Drive name in EVC++ 4.0 on window CE 5.0

pri_skit18-Feb-09 18:39

18-Feb-09 18:39

Q1.I'm trying to write an MFC program in EVC++ 4.0 on window CE 5.0 that lists the disk drives on the system (C:, D:, and so on). I also need to know if the drive is a hard disk or a USB. Is there a class to get this information?

Q2. What are Windows Volume Management Functions in EVC++ 4.0 on window CE 5.0?

priyank

SHGetDataFromIDList Problem

john563218-Feb-09 18:00

john5632

18-Feb-09 18:00

Hi,

I am using SHGetDataFromIDList to get CLSID of Recycler folder of D drive. But the below code is not giving CLSID except dwDescriptionID.
CLSID is coming garbage value like CCCCC.CCCC

where
lptvid->lpsfParent=Shell folder for D drive
lptvid->lpi=PIDL of Recycler folder

SHDESCRIPTIONID lpsf1; 
if(SUCCEEDED(SHGetDataFromIDList(lptvid->lpsfParent,lptvid->lpi,SHGDFIL_DESCRIPTIONID,(LPVOID *)&lpsf1,sizeof(LPSHDESCRIPTIONID))))
{
	cb=GetLastError();
	if(lpsf1.clsid==CLSID_RecycleBin)
         AfxMessageBox(_T("Matched"));


}

Where I am wrong?

CRichEditCtrl and printing

prithaa18-Feb-09 17:44

prithaa

18-Feb-09 17:44

Hello

I have a CRichEditCtrl class which displays contents on a CMDIChildWnd nad now I want to print on paper. Can I print without carrying my contents to CDC and only through CRichEditCtrl?

Prithaa

Re: CRichEditCtrl and printing

Stuart Dootson18-Feb-09 17:52

Stuart Dootson

18-Feb-09 17:52

Don't think so - have a look at this article[^] - it's got all hte rich-edit printing code you could want Smile | :)

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Trying to create a Popup Window

BobInNJ18-Feb-09 5:05

BobInNJ

18-Feb-09 5:05

I would like to add a graph (x vs y plot ) to my application. I would like this graph to be displayed in a new window. Therefore, I wrote the following code:

<br />
void<br />
CMyView::drawGraph()<br />
{<br />
/*<br />
virtual BOOL CreateEx(<br />
   DWORD dwExStyle,<br />
   LPCTSTR lpszClassName,<br />
   LPCTSTR lpszWindowName,<br />
   DWORD dwStyle,<br />
   const RECT& rect,<br />
   CWnd* pParentWnd,<br />
   UINT nID,<br />
   LPVOID lpParam = NULL<br />
);<br />
*/<br />
	CRect rect1( 100, 200, 300, 400 );<br />
	CreateEx(  0, NULL, TEXT("Graph"), WS_OVERLAPPEDWINDOW|WS_CHILD,<br />
		rect1, this, 0 );<br />
}<br />
<br />
Unfortunately, the call to CWnd::CreateEx dies with an assertion error. The routine CWnd::CreateEx<br />
calls the routine AfxHookWindowCreate. This routine has the following assert statement in it:<br />
<code><br />
ASSERT(pWnd->m_hWnd == NULL);   // only do once<br />

In my case, m_hWnd is non-NULL. Therefore, the program aborts. I am sure that I am doing something
wrong in the call to CreateEx but I do not know what it is. Also, I find the documentation for
this call to be lacking. For one thing, I could not find any examples where it was used to create
a sub-window.

Thanks

Bob

Re: Trying to create a Popup Window

prasad_som18-Feb-09 6:26

prasad_som

18-Feb-09 6:26

BobInNJ wrote:
CRect rect1( 100, 200, 300, 400 );
CreateEx( 0, NULL, TEXT("Graph"), WS_OVERLAPPEDWINDOW|WS_CHILD,
rect1, this, 0 );

Effectively, here you are trying to create CMyView again, where it already exists.

You may want to do something like this

CRect rect1( 100, 200, 300, 400 );
m_wndYouwantotCreate.CreateEx( 0, NULL, TEXT("Graph"), WS_OVERLAPPEDWINDOW|WS_CHILD,
rect1, this, 0 );

Re: Trying to create a Popup Window

Iain Clarke, Warrior Programmer19-Feb-09 0:20

Iain Clarke, Warrior Programmer

19-Feb-09 0:20

You can create another window from your view, but it will be a bit complex.

I can think of a couple of choices for you...

The simplest one is to create a new CDialog based class, that only has one control in it. You can find plenty of graph controls here on codeproject that you can pop in this dialog. Then just call DoModal on it, let it stay up until the user presses OK, and all is nice.

The other is a bit more complex. You could make a window like a popup control with your little graph on it, that goes away when the user moves the mouse again. This depends on how you want your software to be. Have a look at:
http://www.dilascia.com/PixieDoc.htm#CPopupText[^]
for a tooltip alike window - just change the drawing code / size to your desires.

Iain.

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

Modifying the window list and/or Ctrl+Tab behaviour in an MDI app

Paul Vickery18-Feb-09 4:28

Paul Vickery

18-Feb-09 4:28

Hi,

By default, when using Ctrl+Tab or the Window menu to switch between windows in a standard MDI app, it leaves the window list in its current order. The behaviour in Visual Studio (ignoring the popup which lists the windows) always puts the current window at the top of the list of windows. This then allows easy toggling between two top windows using Ctrl+Tab, as the previous window is then made the second in the list, so you don't have to cycle through all the open windows to get back to the one you started from.

I am trying to replicate the VS behaviour in an MFC MDI app, but can't find a way of re-ordering the window list. Has anyone else managed to do this?

Paul.

"The way of a fool seems right to him, but a wise man listens to advice" - Proverbs 12:15 (NIV)

Re: Modifying the window list and/or Ctrl+Tab behaviour in an MDI app

led mike18-Feb-09 4:40

led mike

18-Feb-09 4:40

Paul S. Vickery wrote:
but can't find a way of re-ordering the window list

I am not sure if you can change menu item positions, I have never tried to do it. If it is not supported perhaps you could manage the lists order in a more appropriate memory structure and just change the menu item text and which item it references in the structure.

multiple dll

pedefetoll18-Feb-09 3:08

pedefetoll

18-Feb-09 3:08

Context is C++, Visual C6

My application has to interface with two types of peripherals, with the same services :
For exemple, the service is :
void SetOutput( index, level) and

So my application do :
void MyApplicationFunc()
{
classPeripheral *p = new classPeripheral();

p->SetOutput( 0, 1);
}

I want to code TWO DLL in C++, with the same class interface, but driving two diffrents kind of peripherals.
For exemple
class cPeripheral
{
public :
cPeripheral();
void SetOutput( int Index, bool Level);
};

But each implementation have differents internal functions and variables in order to drive the specific peripheral.
So I want to have a good quality of code (no cast or void pointer), a good dependency resolution between the differents .dsp, and the possibility to change one DLL (DLL peripheral 1) by the other (DLL peripheral 2) with a perfect consistancy of dynamic link between application and class services.

Can you give me a simple workspace sample, with the differents projects (.dsp) (Application, peripheral 1, peripheral 2), showing the architecture , definition and inter-dependencies between the differents classes.

Best regards.

Re: multiple dll

CPallini18-Feb-09 3:17

CPallini

18-Feb-09 3:17

You might find one of these design patterns [^] useful.
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.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: multiple dll

Iain Clarke, Warrior Programmer18-Feb-09 3:51

Iain Clarke, Warrior Programmer

18-Feb-09 3:51

marcelcerdanjunior wrote:
Can you give me a simple workspace sample, with the differents projects (.dsp) (Application, peripheral 1, peripheral 2), showing the architecture , definition and inter-dependencies between the differents classes.

Do I have to provide the spoon too?

More seriously, I do exactly what you're talking about - I have plugin DLLs which manage different motion control architectures through a common interface. I don't actually use COM for this, as I'm not that bothered about other people controlling my machines, but I do use their philosophy.

I have a pure virtual class, and the implementations inherit from this. So far, just like "interface" keyword.

I have a registry key with the name of the implementation DLL. I load that, and call a named function to export a pointer to a control object. That pointer is of the virtual base class type. All other parts of the software only know about that base class.

There are some good starter articles on COM on this site if you want further inspiration.

Good luck,

Iain.

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

Re: multiple dll

led mike18-Feb-09 4:30

led mike

18-Feb-09 4:30

Nice post but you didn't explain what the spoon is for. Poke tongue | ;-P

Oh, if it involves his hind parts I don't want to know. Laugh | :laugh:

CComboBox

durban218-Feb-09 2:32

durban2

18-Feb-09 2:32

HI! help, please, me.
MFC, Visual C++ STUDIO 2008
I want to place string into ComboBox that
Is on modeless dialog window.
I’m using two classes:

class CAdodc_my : public Cdialog
class CMyModeless2 : public Cdialog

CMyModeless2* m_pModeless; // into "MyModeless2.h"
CComboBox m_cComboBoxModeless;  // into "MyModeless2.h"

BOOL CAdodc_my::OnInitDialog()
{
m_pModeless = new  CMyModeless2( this); // into constructor Adodc_my.cpp
m_pModeless->m_cComboBoxModeless.AddString("SPARTAC");
}
Debug Assertion Failed!
Program: ...Tested_Examples_Studio_2008\ADOMy_first\Debug\ADOMy_first.exe
File: f:\dd\vctools\vc7libs\ship\atlmfc\include\afxwin2.inl
Line: 879
For information on how your program can cause an assertion
failure, see the Visual C++ documentation on asserts.
(Press Retry to debug the application)

Re: CComboBox

krmed18-Feb-09 2:45

krmed

18-Feb-09 2:45

At the time you try to AddString, you have not yet created the dialog, so the ComboBox doesn't exist yet.

After you create the instance with new, you need to call Create to actually create the windows.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: CComboBox

_AnsHUMAN_ 18-Feb-09 2:46

_AnsHUMAN_

18-Feb-09 2:46

is m_cComboBoxModelessinitialized/created?

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: CComboBox

David Crow18-Feb-09 3:05

David Crow

18-Feb-09 3:05

CHIVOTIOV wrote:
m_pModeless->m_cComboBoxModeless.AddString("SPARTAC");

Do this in CMyModeless2::OnInitDialog().

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Passing a string

brucewayn18-Feb-09 2:31

brucewayn

18-Feb-09 2:31

I have string data for a dialog. However when i click on the a button i want this string data to be displayed on the second dialog.

Please let me know how to achieve this...

Thanks in advance

Re: Passing a string

Cedric Moonen18-Feb-09 2:38

Cedric Moonen

18-Feb-09 2:38

Check this article[^]

Cédric Moonen
Software developer

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

Re: Passing a string

CPallini18-Feb-09 22:06

CPallini

18-Feb-09 22:06

I think the link to that tox's article should be permanently added to the forum page.
Big Grin | :-D

Re: Passing a string

Cedric Moonen18-Feb-09 22:49

Cedric Moonen

18-Feb-09 22:49

Yep, it's a shame it is so under-rated...

Cédric Moonen
Software developer

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

Re: Passing a string

CPallini18-Feb-09 23:12

CPallini

18-Feb-09 23:12

Yes. I think the article for beginners are the most valuable here at CP.
Unfortunately, such articles are often downvoted by the 'very-smart-super-expert' people who enjoys themselves just with the 'most-advanced-innovative-stuff' (not to mention the 'trollistic-coward-univoter' CP plague).
I suppose there is also something personal against tox, since he is a bit 'touchy', no need to say that if you downvote an article beacuse you dislike the author then you're definitely a pathological idiot.
It's frustrating form me, having to say, each time: "Trust me, it scored bad, but is actually a very good article".

Re: Passing a string

eraccn18-Feb-09 3:00

eraccn

18-Feb-09 3:00

Can u get the second dialog's handle,if so u can use postmessage()

Later buggers harm more.

OnSize() function help

Deepu Antony18-Feb-09 1:28

Deepu Antony

18-Feb-09 1:28

Hi all

I am a view class which is derived from CScrollView.I am overriding OnSize() function.

But when the window is minimized or maximized it is not calling.When it is restored it is calling.

Can anybody help me.I have to do some calculations when the window is minimized.

Thanks and regards
Deepu.

Re: OnSize() function help

Arman S.18-Feb-09 1:52

Arman S.

18-Feb-09 1:52

WM_GETMINMAXINFO
BOOL IsIconic(HWND wnd)

--
Arman

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