C / C++ / MFC

18-Dec-02 23:14

i have an mfc dialog based app.
in the initInstance function, I'm creating an object of the dialog box (provided by the wizard) and creating a tray icon using NotifyIconData.(without showing the dialog box).

NOW i want to show this dialog box when i right click on this icon but multiple instances of dialog box appear even if i move my mouse over the icon, while i have used WM_LBUTTONDBLCLK in the code below (InitInstance)?

how do i go about it?
this is my src code

CSchdDlg dlg;

m_NotifyIconData.cbSize = sizeof m_NotifyIconData;
m_NotifyIconData.hWnd =dlg.GetSafeHwnd();
m_NotifyIconData.uID = 1;
m_NotifyIconData.uCallbackMessage = WM_LBUTTONDBLCLK ;
m_NotifyIconData.uFlags = NIF_MESSAGE|NIF_ICON|NIF_TIP;
m_NotifyIconData.hIcon = LoadIcon(IDR_MAINFRAME);
strcpy(m_NotifyIconData.szTip, AfxGetAppName());

Shell_NotifyIcon(NIM_ADD, &m_NotifyIconData);

a quick & detailed response will be heartly appreciated!

thanx
rishabhs

rishabhs

Zdenek Navratil19-Dec-02 0:07

Zdenek Navratil

19-Dec-02 0:07

This is what works for me:

#define UWM_ICONNOTIFY WM_APP+x

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
//...
ON_MESSAGE(UWM_ICONNOTIFY, OnSystemTrayIconNotify)
//...
END_MESSAGE_MAP()

LRESULT CMyDlg::OnSystemTrayIconNotify(WPARAM, LPARAM lParam)
{
switch (lParam)
{
case WM_LBUTTONDBLCLK:
// do something
// etc.
}
return 0;
}

// Initialize system tray icon
//
m_nid.cbSize = sizeof(NOTIFYICONDATA);
m_nid.hWnd = m_hWnd;
m_nid.uID = ID_SYSTEMTRAYICON;
m_nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
m_nid.uCallbackMessage = UWM_ICONNOTIFY;
m_nid.hIcon = (HICON)LoadImage(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDI_MYTRAYICON), IMAGE_ICON, 16, 16, 0);
strcpy(m_nid.szTip, "Blah, blah");
Shell_NotifyIcon(NIM_ADD, &m_nid);

HTH
Zdenek

r i s h a b h s19-Dec-02 0:15

19-Dec-02 0:15

can u be a bit more specific with ur code.

how to get the :-
ON_MESSAGE(UWM_ICONNOTIFY, OnSystemTrayIconNotify)

in the message map declaration

Zdenek Navratil19-Dec-02 1:14

Zdenek Navratil

19-Dec-02 1:14

I suppose a Class Wizard has created a
BEGIN_MESSAGE_MAP(CYourDialog, CDialog)...END_MESSAGE_MAP()
sequence for CYourDialog.
Using your editor, paste a line
ON_MESSAGE(UWM_ICONNOTIFY, OnSystemTrayIconNotify)
there (for example just below the BEGIN_MESSAGE_MAP() macro line).
Avoid a temptation to put it somewhere between
//{{AFX_MSG_MAP(CYourDialog)
//}}AFX_MSG_MAP
since Class Wizard might get confused.
Insert the declaration of your icon message handler OnSystemTrayIconNotify
into CYourDialog class. Like this:
afx_msg LRESULT OnSystemTrayIconNotify(WPARAM, LPARAM);

That's all.
Zdenek

Fredrik Skog19-Dec-02 0:12

Fredrik Skog

19-Dec-02 0:12

Setting uCallbackMessage = WM_LBUTTONDBLCLK causes that message to be sent every time the mouse pointer is over the tray icon.
You need to specify your own message and handle that in a subclassed WindowProc.
Like:

#define WM_NOTIFY_ICON		(WM_USER + 10)	//+10 because some of the first may be used.

m_NotifyIconData.uCallbackMessage = WM_NOTIFY_ICON;

LRESULT MyDlg::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	// TODO: Add your specialized code here and/or call the base class
	switch(message)
	{
	case WM_NOTIFY_ICON:
		switch (lParam)
		{
		case WM_LBUTTONDBLCLK:
			ShowWindow(SW_SHOWNORMAL);
			TRACE("> Left mouse button double-clicked on icon.\n");
			SetForegroundWindow();	// Window to front if behind other windows.
			break;					// This is used when the app is not minimized,
									// but hidden behind other windows.
		default:
			break;
		}
		break;

	default:
		break;
	}
	return CDialog::WindowProc(message, wParam, lParam);
}

Cheers,
Fredrik

"Felix qui potuit rerum cognoscere causas."

r i s h a b h s19-Dec-02 0:47

19-Dec-02 0:47

fredrik sorry to bother u but plz. tell me where do i put
the windowproc function (In the Cwnd derived class or CDialog derived class).

Fredrik Skog19-Dec-02 0:50

Fredrik Skog

19-Dec-02 0:50

Use the Class Wizard to subclass the WindowProc of your dialog.

Cheers,
Fredrik

"Felix qui potuit rerum cognoscere causas."

r i s h a b h s19-Dec-02 1:22

19-Dec-02 1:22

THANX FREDRIK! that worked fine.

but whenever i dblclick on the icon a new dialog box ois opened. How to make sure that only one dialog is opened at a time.

rishabhs

Re: Listing network paths?

Fredrik Skog19-Dec-02 1:24

Fredrik Skog

19-Dec-02 1:24

It would help if you posted some code.

Cheers,
Fredrik

"Felix qui potuit rerum cognoscere causas."

Listing network paths?

scy7he18-Dec-02 23:08

scy7he

18-Dec-02 23:08

How can i list network paths? Something like what the command dir does is what i want.

Andreas Saurwein19-Dec-02 1:22

Andreas Saurwein

19-Dec-02 1:22

Have a look at the FindFile API for the dir functionality, the network part is a bit trickier (and depends on what you want to do).

I don't think this is a serious possesion, and the evil most likely comes from your hand. Colin J Davies, The Lounge

Different versions of ODBC drivers accept different parameters (Execute())??

Wenrich18-Dec-02 22:29

Wenrich

18-Dec-02 22:29

in my app, i have the following code run successfully with
MS Access Driver 4.00.6019.00, but fail with version
4.00.6200.00. the exception thrown says
"[ODBC MS Access Driver] Too few parameters. Expected 1."

// _ConnectionPtr m_pConnection;
// _RecordsetPtr m_pRecordSet;
m_pRecordSet = m_pConnection->Execute(_bstr_t(query), &vRecsAffected, adOptionUnspecified);

How should i overcome this problem? is there a generic way
that works with different versions of MS Access Driver?

Thanks a lot!

Wenrich

Re: Different versions of ODBC drivers accept different parameters (Execute())??

Pavel Klocek18-Dec-02 22:47

Pavel Klocek

18-Dec-02 22:47

What is in query?
Maybe some field name is equal to a reserved word added in new version?

Pavel
Sonork 100.15206

Re: Different versions of ODBC drivers accept different parameters (Execute())??

Wenrich19-Dec-02 13:42

Wenrich

19-Dec-02 13:42

Thanks Varel!
this query is

CString query;
query.Format(_T("SELECT * FROM %s WHERE (%s='%s') AND (%s='%s')"), table, key, value1, field, value2);
// table:"client", key:"ID", value1:"some name", field:"Pass", values"some
// password"

Is there anything wrong with the field names?

Thanks a lot!

Re: Different versions of ODBC drivers accept different parameters (Execute())??

Pavel Klocek20-Dec-02 0:35

Pavel Klocek

20-Dec-02 0:35

I would try:

SELECT * FROM [%s] WHERE ([%s]='%s') AND ([%s]='%s')

Doesn't some of the values contain an ' character (apostrof)?

Pavel
Sonork 100.15206

Handle of a Bitmap Image ?

ArunKGoyal18-Dec-02 22:26

ArunKGoyal

18-Dec-02 22:26

How do I get the Handle of a Bitmap image which is created in bitmap resource editor.

Re: Handle of a Bitmap Image ?

PDStone18-Dec-02 22:34

PDStone

18-Dec-02 22:34

CBitmap bBitmap;
bBitmap.LoadBitmap(RESOURCE_ID);
HBITMAP hBitHandle = (HBITMAP)bBitmap;

Bear in mind when the CBitmap goes out of scope the handle will be invalid;
You may need to make the CBitmap a member Variable

Re: Handle of a Bitmap Image ?

Dominik Reichl18-Dec-02 22:39

Dominik Reichl

18-Dec-02 22:39

First you have to load the bitmap using the LoadBitmap function. This function needs the instance of the app and an LPCTSTR string identifing the resource.

HBITMAP hbm;

hbm = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_REDCHICKEN));

...

DeleteObject(hbm);

Don't forget to release the bitmap handle using DeleteObject.

Big Grin | :-D

-Dominik

Re: Problem with CFileDialog

PDStone18-Dec-02 22:24

PDStone

18-Dec-02 22:24

Try this, I haven't checked it but somthing along these lines should do it

char szFilePath[_MAX_PATH + 1];
char szDir[_MAX_DIR + 1];
char szDrive[_MAX_DRIVE + 1];
CString szFile;

::GetModuleFileName(NULL, szFilePath, MAX_PATH);
::_splitpath(szFilePath, szDrive, szDir, NULL, NULL);

szFile = szDrive + szDir + ""MyFile.txt"

Message transfer between two classes?

chen18-Dec-02 21:32

chen

18-Dec-02 21:32

Hi,

In a dialog based application, I have two classes such as

class A
{
do some calculation with a thread;
}

class B : public CDialog
{
here a have a static control, to show some text or numberical
information with the varible CSting m_show;
}

My problem is how to show the text info (class A) in the main dialog (class B) when the thread is started?

Thanks in advance!

chen

Rage18-Dec-02 21:42

Rage

18-Dec-02 21:42

I did something like this a few months ago. B was my main Dialog, so I just used AfxGetMainWnd in A to retrieve a Cwnd* which I casted on the B class, just as you do with the thread parameter. The result of the operation was that I had a pointer on the B class inside A, and I synchronized the whole with Critical_section, in order not to show in B data being changed simultaneously in A. Sleepy | :zzz:

A naive question : is it not possible to put your A data in a struct, and post it through a user message to B (I have really no idea if this is possible or not Unsure | :~

)?

~RaGE();

chen18-Dec-02 21:53

chen

18-Dec-02 21:53

Hi RaGE,

Thank you very much for your reply!

I want to try the first method, but would you please say that in more detail or give me an simple example project?

Best Regards,

chen

Rage18-Dec-02 23:35

Rage

18-Dec-02 23:35

Declare

CRITICAL_SECTION m_cs;
int *m_myData;   //or whatever it is

as member variables in B.
In OnInitDialog of B :

InitializeCriticalSection(&m_cs);

So, in the thread A :

CWnd* pWnd=AfxGetMainWnd();
CMainDlg *pMainDlg=(CMainDlg*)pWnd;   //where CMainDlg is your B class

... do some stuff ...

EnterCriticalSection(&pMainDlg->m_cs);
pMainDlg->m_myData[8]=22;  //or whatever
LeaveCriticalSection(&pMainDlg->m_cs);

And in the "show" section of B:

EnterCriticalSection(m_cs);
//Here update Data display
LeaveCriticalSection(m_cs);

So that's the start. You may have member variables in B which simply copies member variables of A just for display purposes. Of course, this is not a _good_ way to do multithreading, but i think that it is simple enough, and it works if the updating of data in the thread is not too time-critical.

If this doesn't work, you're going to use CEvent's ...

~RaGE();