Re: Getting Data from a Dialog in a an MDI Document - C / C++ / MFC Discussion Boards

Neville Franks25-Jun-02 11:11

25-Jun-02 11:11

Hi Ravi, I'm actually using Bruno's excellent CNewMenu code. This does subclass the menu but a) I am a little reluctant to start mucking around in the subclass code and b) I can't work out what I would do here anyway. Any suggestions?

Neville Franks, Author of ED for Windows. www.getsoft.com

Re: Preselecting a Popup menu item

Ravi Bhavnani25-Jun-02 11:29

Ravi Bhavnani

25-Jun-02 11:29

Hi Neville,

I haven't looked at Bruno's article, but off the top of my head I'd do this:

Store the preselected id in a member variable.
Override the handler for "mouse on new menu item" (not WM_MENUSELECT) and clear the member variable.
In the OnDrawItem() override, draw the item as selected if its id matches the member variable's value (if non-zero). If the member variable is zero (i.e. has been cleared), just call the base class OnDrawItem().

I think the tricky part is handling the message "mouse on new menu item". I hope these thoughts end up being helpful and not a waste of time!

/ravi

Let's put "civil" back into "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Preselecting a Popup menu item

Neville Franks25-Jun-02 11:58

Neville Franks

25-Jun-02 11:58

Hi Ravi,
Thanks for that - I'll ponder on it.

For all my years of Windows development I've always been frustrated by the menu handling code, but this isn't the time nor the place for that. Smile | :)

Neville Franks, Author of ED for Windows. www.getsoft.com

smiley

24-Jun-02 14:28

hello i just want these emoticons

saad ali

Re: smiley

Nish Nishant24-Jun-02 15:13

Nish Nishant

24-Jun-02 15:13

saad ali wrote:
hello i just want these emoticons

What do you mean, you want them? If you mean you want them on your hard disk, just right click and take save-as. If you mean you want them for your web site, you'll probably need Chris M's permission.

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Re: smiley

Christian Graus24-Jun-02 17:44

Christian Graus

24-Jun-02 17:44

No, he WANTS them. BAD. If you're handling a used emoticon in this forum, be careful, because you do not know where it has been.

Christian

I am completely intolerant of stupidity. Stupidity is, of course, anything that doesn't conform to my way of thinking. - Jamie Hale - 29/05/2002

Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied. - Alex, 13 June 2002

Getting Data from a Dialog in a an MDI Document

Matt Fenwick24-Jun-02 11:22

Matt Fenwick

24-Jun-02 11:22

This is going to sound like a stupid question, but I can't find anything on how to do it. I have a text editor MDI that calls up a dialog box. I have the information saved as a CString in the dialog box, but now how do I get it from there and displayed in my document?

I've looked at the MSDN CD, and also this site, but I can't seem to find a step by step tutorial on how to do it. Can anyone help me to do this simple task, or at least point me in the right direction to find out?

Thanks
Matt Fenwick

Re: Getting Data from a Dialog in a an MDI Document

Donald Blachly24-Jun-02 12:26

Donald Blachly

24-Jun-02 12:26

I am just teaching myself MFC so I hope I don't steer you in the wrong direction.

Here is a tutorial I did tried this weekend. It should help. Note, there are a few errors but you should be able to get through it.

http://www.codeproject.com/dialog/dialogapptute2.asp

The tutorial takes data from a various controls and puts it in a list box and then to a dialog box, but the principle should be the same.

You can use the class wizard to make a member variable (I think you will use a category of "control") to hold the data you want moved to the document.

When you come to a fork in the road, take it! Y. Berra

Re: Getting Data from a Dialog in a an MDI Document

Joaquín M López Muñoz24-Jun-02 12:34

Joaquín M López Muñoz

24-Jun-02 12:34

Well, if your dialog is modal (i.e. you launch it with DoModal,) things are simple. You already mapped the string to some member variable of the dialog (let's say it's called m_str.) Then, after DoModal, the value is just there for you to use:

void CYourView::OnSomeParticularEvent()
{
  CYourDlg dlg;
  if(dlg.DoModal()==IDOK){
    // use dlg.m_str (for instance, to store it in your
    // CDocument-derived class.)
  }
}

I hope I made myself clear enough. Good luck with your project.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

ctrl+alt+del

slah24-Jun-02 10:18

slah

24-Jun-02 10:18

hi i want to ignore this event in my application. is there any way out.

Re: ctrl+alt+del

Scott H. Settlemier27-Jun-02 9:48

Scott H. Settlemier

27-Jun-02 9:48

Use the SystemParametersInfo function's
undocumented SPI_SETSCREENSAVERRUNNING

UINT _Junk;

// turn off ctl-alt-del
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,1,&_Junk,0);

// ... do stuff? like what?

// turn on ctl-alt-del
SystemParametersInfo(SPI_SETSCREENSAVERRUNNING,0,&_Junk,0);

CSocket in MFC Console app

Sprudling24-Jun-02 9:02

Sprudling

24-Jun-02 9:02

I created a console app supporting MFC to create a small IRC bot. However I can't get my CSocket-derived class to work properly. The AfxSocketInit() call is successful, and so is CMySocket::Create() and CMySocket::Connect(). Using classwizard I overloaded the OnRecieve member to let me know when there is something to recieve. I've done all this in a regular Win32 MFC app before, and it worked as it should. In this console app however it (CMySocket::OnRecieve()) just doesn't get called. I know there is data to recieve because when I call it myself there is.

I'm really stuck here... Confused | :confused:

Sprudling

Re: CSocket in MFC Console app

Andres Manggini24-Jun-02 9:12

Andres Manggini

24-Jun-02 9:12

If I recall correctly from my CSocket days (years ago), don't you need a window to use CSocket ?. If this is true, then a console application won't work.

Hope this helps.

Andres Manggini.
Buenos Aires - Argentina.

Re: CSocket in MFC Console app

Sprudling24-Jun-02 10:30

Sprudling

24-Jun-02 10:30

I can't see how it needs a window? The class basicly works, and I can use it to send and recieve perfectly, but the OnEvent()-functions just doesn't get called by the MFC framework. Do I need a message loop or anything to make it do so?

If this isn't possible, how can I check if there is data ready to be recieved, without halting the program if there isn't any?

Sprudling

Re: CSocket in MFC Console app

Nish Nishant24-Jun-02 15:16

Nish Nishant

24-Jun-02 15:16

Asynchronous calls like OnReceive and OnSend need a window!

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Re: CSocket in MFC Console app

24-Jun-02 17:52

You do need a window to receive event notifications like OnReceive. Network events are processed with the same mechanism used to process windows messages. So u need a window to receive those notifications. A console app has no connection with windows.

single instance

Anthony988724-Jun-02 8:48

Anthony9887

24-Jun-02 8:48

How can I make a dialogbox as a single instance. So multiple copies cannot get executed.

Thanks

Re: single instance

Andres Manggini24-Jun-02 9:25

Andres Manggini

24-Jun-02 9:25

You can use the class: CMutex

A Mutex it's a kernel object which can be accessed from different process.

Basically on the first run of your application check for a named mutex, if it doesn't exists, create it, if exists exit your program.

Here's a piece of help from MSDN:

"An object of class CMutex represents a "mutex" — a synchronization object that allows one thread mutually exclusive access to a resource. Mutexes are useful when only one thread at a time can be allowed to modify data or some other controlled resource. For example, adding nodes to a linked list is a process that should only be allowed by one thread at a time. By using a CMutex object to control the linked list, only one thread at a time can gain access to the list."

I don't have an example at hand, sorry.

Hope this helps.

Andres Manggini.
Buenos Aires - Argentina.

Re: single instance

Dean Michaud24-Jun-02 10:09

Dean Michaud

24-Jun-02 10:09

This is code I use in my applications to solve this:

BOOL MyAppClass::InitInstance(void)
{
	if (IsAppAlreadyRunning() == TRUE)
	{
		return (FALSE);
	}

...

	return (TRUE);
}


boolean MyAppClass::IsAppAlreadyRunning(void)
{
	// Determine if application already exists...
	if (OpenMutex(MUTEX_ALL_ACCESS, FALSE, UNIQUE_APPLICATION_MUTEX_STRING) != NULL)
	{
		AfxMessageBox(_TEXT("Error! Application is already running, cannot start another instance."), MB_ICONEXCLAMATION);
		return (TRUE);
	}

	CreateMutex(NULL, FALSE, UNIQUE_APPLICATION_MUTEX_STRING);

	return (FALSE);
}

: Dean 'Karnatos' Michaud

Re: single instance

PJ Arends24-Jun-02 16:06

PJ Arends

24-Jun-02 16:06

http://www.codeproject.com/cpp/avoidmultinstance.asp

---
CPUA 0x5041

Sonork 100.11743 Chicken Little

Within you lies the power for good - Use it!

Re: single instance

25-Jun-02 7:12

In Your Dialogs InitInstance()

Add The Code

CreateMutex(NULL,FALSE,"Single");//last is the name u like
if(GetLastError()==ERROR_ALREADY_EXISTS)
{
//Thre is an instance exists.
//return from here
}

Renjith-The CPian.

TreeView Control setting checked

Mr. Bill24-Jun-02 8:32

Mr. Bill

24-Jun-02 8:32

I have a treeview control that was created with the property TVS_CHECKBOXES. When I insert a HTREEITEM I want to be able to specify whether it is checked or not. I am insterting the item like this.

HTREEITEM parent = m_treeView.InsertItem("root",TVI_ROOT, TVI_LAST);

any help will be appreciated.

Thanks,
Bill

Re: TreeView Control setting checked

Mr. Bill24-Jun-02 9:11

Mr. Bill

24-Jun-02 9:11

I was thinking that SetItemState would do it but I am not sure what state to set.

Bill

Re: TreeView Control setting checked

Steve L.24-Jun-02 10:01

Steve L.

24-Jun-02 10:01

try this:
m_treeItem.SetCheck( parent, TRUE );

-Raffi

Re: TreeView Control setting checked

Anonymous24-Jul-02 23:57

Anonymous

24-Jul-02 23:57

I believe the following will work:

If m_treeView is a View, you need to get the control

CTreeCtrl & theCtrl = m_treeView.GetTreeCtrl() (This is from memory, so the syntax and spelling may be off a bit, but it's very close.)

Then use:

theCtrl.SetCheck(hParent, TRUE);

HTH

Ron Brunton (I haven't registered yet)
rbrunton@accesswave.ca

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