Re: a question of edit control - C / C++ / MFC Discussion Boards

Re: a question of edit control

ilavl31-May-02 17:07

ilavl

31-May-02 17:07

but there's no message like GetFocus,
(I look it up in class wizard)

Re: a question of edit control

valikac31-May-02 5:15

valikac

31-May-02 5:15

Use EN_SETSEL

-----

// editHWnd is the handle to your edit control
// from and to are the beginning and end of your select range

SendMessage(editHWnd, EM_SETSEL, static_cast<wparam>(from),
static_cast<lparam>(to));
-----

Kuphryn

Re: a question of edit control

Tomasz Sowinski31-May-02 5:32

Tomasz Sowinski

31-May-02 5:32

There's no EN_SETSEL.

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: a question of edit control

valikac31-May-02 5:27

valikac

31-May-02 5:27

I meant EM_SETSEL.

Kuphryn

Re: a question of edit control

Tomasz Sowinski31-May-02 5:38

Tomasz Sowinski

31-May-02 5:38

And what do you think CEdit::SetSel does?

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: a question of edit control

valikac31-May-02 5:36

valikac

31-May-02 5:36

There are more than one way to get it working. Using EM_SETSEL is another method. I recommend trying that method to see if get the design where you want it.

Kuphryn

Re: a question of edit control

Tomasz Sowinski31-May-02 6:01

Tomasz Sowinski

31-May-02 6:01

Just FYI, CEdit::SetSel is a thin wrapper which sends EM_SETSEL. So there's no difference, unless you want to achieve macho-API posture. Smile | :)

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: a question of edit control

James R. Twine31-May-02 10:26

James R. Twine

31-May-02 10:26

   Two things: First (as I go into Pedantic mode...)

Anonymous wrote:

CEdit* ped=(CEdit*)GetDlgItem(IDC_EDIT_ap1);<br /> ped->SetSel(0, -1, FALSE);

   I would recommend that you do not get into the habit of casting the return value of GetDlgItem(...) to a CEdit* (or other class type) like that.  There are certain situations where GetDlgItem(...) will return a pointer to a real CEdit (or other Control Class) object, but if you do not know what those situations are, it is best to avoid this entirely.  Bind a CEdit member variable to the control, and use it instead.

   True, in the case of MFC, doing that is usually safe, but in general C++ practices, it is a bad thing to do: you do not know if the pointer returned by GetDlgItem(...) is, or ever was, a pointer to an actual CEdit object.

   Second, try using PostMessage(...) to send yourself the EM_SETSEL message from inside the OnSetFocus handler.

   BTW: CWnd::OnSetFocus(...) is a standard function.  What is OnSetfocusEDITap1 supposed to be?  You may be handling the WM_SETFOCUS message incorrectly.

   Peace!

-=- James.
"Some People Know How To Drive, Others Just Know How To Operate A Car."
(Try Check Favorites Sometime!)

Re: a question of edit control

ilavl31-May-02 17:10

ilavl

31-May-02 17:10

yeah, I thought there must be sth wrong with the function
OnSetfocusEDITap1,I thought may be there is a function
named OnGetFocus...., but I failed to find it.
Have you met this question?

callback or thread?

bryce31-May-02 0:00

bryce

31-May-02 0:00

Hi I have a CDialog based app which queries a data to gainthe information it requires to fill up the controls, but it takes a bit of time atm and i've not got it threaded or anything...which do people reckon is better...write a thread handler to get the info and a timer to check if the thread is finished...or use a callback function?

Bryce
I reckon callback fwiw

Re: callback or thread?

Tomasz Sowinski31-May-02 0:10

Tomasz Sowinski

31-May-02 0:10

bryce wrote:
write a thread handler to get the info and a timer to check if the thread is finished

Just before returning from thread function use PostMessage to notify your dialog that processing is done.

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: callback or thread?

James R. Twine31-May-02 10:31

James R. Twine

31-May-02 10:31

bryce wrote:
I reckon callback fwiw

   You would still need something to do the work of gathering the data and calling the callback function.

   Depending on how long it takes, I would consider using a thread, as has already been suggested.  For example, if it took 30 seconds to gather the information, I might use a worker thread so that the UI would remain responsive and I could give the user the chance to cancel if they got tired of waiting.

   But if it would only take 5-10 seconds, I would just let the user sit there looking at a Wait Cursor (after drawing the dialog at least once, of course).  Also, even though threads are considered the "correct" way to do things, sometimes a little message-pump in between steps works well enough that users will not notice the difference.

   YMMV.

   Peace!

-=- James.
"Some People Know How To Drive, Others Just Know How To Operate A Car."
(Try Check Favorites Sometime!)

Re: callback or thread?

Ed Gadziemski31-May-02 11:44

Ed Gadziemski

31-May-02 11:44

Neither, until you figure out why the data retrieval is taking so long. If you optimize the query, you won't need to wait for the data.

Is there an include required for threads?

Nnamdi Onyeyiri30-May-02 23:11

Nnamdi Onyeyiri

30-May-02 23:11

OK...I have looked at many different articles about threads, all say the same thing, but when i do it, it says this:-
'AfxBeginThread' : none of the 2 overloads can convert parameter 1 from type 'void (void)'

so i wondered if there is an include that i need or something?

==================================================
Homepage: www.onyeyiri.co.uk
Email: theeclypse@hotmail.com
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Re: Is there an include required for threads?

Michael P Butler30-May-02 23:43

Michael P Butler

30-May-02 23:43

AfxBeginThead is in AfxWin.h, which should already be included in an MFC app-wizard generated application.

Post the code and somebody might be able to spot your error.

Michael Smile | :)

Errata 1: p. 154, section 'Defusing'. For 'red wire' read 'blue wire'.

Re: Is there an include required for threads?

Nnamdi Onyeyiri30-May-02 23:45

Nnamdi Onyeyiri

30-May-02 23:45

void CSpeakItDlg::OnSpeakit() 
{
	AfxBeginThread(DoSpeak, this);
}

void CSpeakItDlg::DoSpeak()
{
	ISpVoice * pVoice = NULL;

    if (FAILED(CoInitialize(NULL)))
	{
		AfxMessageBox("Error to intiliaze COM");
        return;
	}

    HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice);
    if( SUCCEEDED( hr ) )
    {
        hr = pVoice->Speak(m_sText.AllocSysString(), 0, NULL);
        pVoice->Release();
        pVoice = NULL;
    }

    CoUninitialize();
}

UINT CSpeakItDlg::DoSpeak(LPVOID lpv)
{	
	 CSpeakItDlg * me = (CSpeakItDlg *)lpv;
     me->DoSpeak();
     return 0;
}

==================================================
Homepage: www.onyeyiri.co.uk
Email: theeclypse@hotmail.com
"I'm not any old Eclypse, i'm TheEclypse..get it, got it, good!"

Re: Is there an include required for threads?

Michael P Butler30-May-02 23:53

Michael P Butler

30-May-02 23:53

Is your DoSpeak thread function declared as static in the header?

Michael Smile | :)

Errata 1: p. 154, section 'Defusing'. For 'red wire' read 'blue wire'.

Re: Is there an include required for threads?

Nnamdi Onyeyiri31-May-02 0:02

Nnamdi Onyeyiri

31-May-02 0:02

declared as static??? excuse my not knowing anything. Blush | :O

==================================================
Homepage: www.onyeyiri.co.uk
Email: theeclypse@hotmail.com
"I'm not any old Eclypse, i'm TheEclypse..get it, got it, good!"

Re: Is there an include required for threads?

Nish Nishant31-May-02 0:10

Nish Nishant

31-May-02 0:10

The thread proc must either be a static function of the class or a global function which is not part of any class.

It should return an UINT and take an LPVOID as parameter since that's what AfxBeginThread() expects

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Re: Is there an include required for threads?

markkuk31-May-02 2:06

markkuk

31-May-02 2:06

In your class header file:

class CSpeakItDlg {
public:
static UINT DoSpeak(LPVOID lpv);
// rest of declarations
};

Re: Is there an include required for threads?

Tomasz Sowinski30-May-02 23:50

Tomasz Sowinski

30-May-02 23:50

'DoSpeak' is a method of CSpeahItDlg. AfxBeginThread expects standalone function prototyped like this:

UINT MyThreadProc(LPVOID pvParam);

pvParam gets the 2nd parameter passed to AfxBeginThread. Basically, you should just cast pvParam to CSpeakItDlg* and call DoSpeak method.

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

How to change input of edit of another program in my own problem?

mzt30-May-02 22:58

mzt

30-May-02 22:58

How to change input of edit of another program in my own problem?
My program is following:

m_strTemp="E:\\vc\\MagnMod\\GEOMAGIX.EXE E:\\vc\\MagnMod\\US-2000.COF";
::WinExec(m_strTemp,SW_HIDE);
HWND* m_pwnd= FindWindow(NULL,"Geomagix: calculation of Earth's magnetic field
from Magnetic Models");

//m_pwnd->ShowWindow(SW_HIDE);
CWnd* m_wnd=m_pwnd->GetWindow(GW_CHILD);
CWnd m_pxwnd;
m_pxwnd.Attach(m_wnd->m_hWnd);
//char m_xtext[11];
m_pxwnd.SetWindowText("12");

First, I get the handle of the window in which edit is,then get the handle of the edit.But I can't get or set the characters of the edit.
"getdlgitemtext","setdlgitemtext","setwindowtext" all can't solve it.I have also tried other means，such as "sendmessage(hwnd,wm_get(set)text,0,.....)".

thanks!

Re: How to change input of edit of another program in my own problem?

Mike Nordell1-Jun-02 0:27

Mike Nordell

1-Jun-02 0:27

Have you tried putting your strings on the clipboard and just sending WM_PASTE to the edit controls?

Network Application Winsock (Modem)

Sameer Maggon30-May-02 21:26

Sameer Maggon

30-May-02 21:26

Hi,
I want to develop an application (under Win98) which
receives a call if someone connects and then send some files from a directory to the one who has connected.

Please help

Sameer

Re: Network Application Winsock (Modem)

lucy31-May-02 4:57

lucy

31-May-02 4:57

Does this design make any sense?

1. Using TCP/IP protocol.
2. run a server app on your PC, which monitor a predefined port all the time, to see if there is any request of file transfer.
3. on the other end of the link, run a client-like app, which tries to connect to your PC via that predefined port. Once connected, receive the file. After file is received in full, disconnect.

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