CreatePrinterDC fails? - C / C++ / MFC Discussion Boards

Re: Newbie: Referencing several controls

Joel Lucsy26-Jul-02 18:24

Joel Lucsy

26-Jul-02 18:24

The above example is still correct, but perhaps you'd like something like:

<br />
UINT id[] = { IDC_CONTROL1, IDC_CONTROL2, IDC_CONTROL3, 0 };<br />
/*remember to put a zero at the end of the array*/<br />
<br />
for (int i = 0; id[ i ]; i++)<br />
{<br />
    CWnd *item = GetDlgItem( id[ i ] );<br />
    item->EnableWindow( FALSE );<br />
    /*whatever else...*/<br />
}<br />

Joel Lucsy (jjlucsy@ameritech.net)

populating a multiline edit, or Crichedit

nss26-Jul-02 7:28

nss

26-Jul-02 7:28

I see its like for a simple multi edit

m_string= "T line 1Text line 1\r\n";<br />
	m_string += "Text line  line 1Text lineText line 1 Text line  line 1Text lineText line 1w\r\n";<br />
	m_string += "Text line 1Text l 2\r\n";<br />
	m_string += "Text line 4\r\n";

THen these entries are separate lines, and horizontal scrollbar shows up when necessary.

What I have is a bunch of text thats like a couple of paragraphs and I want to have it look normal in th editbox. I thought of using a richedit but dont know how to populate it. MSDN is talking about a StreamIn function but it looks awfully complicated. The text I have is coming in as a char* pointer.
Any hints?
Thanks,
ns

Re: populating a multiline edit, or Crichedit

nss26-Jul-02 7:51

nss

26-Jul-02 7:51

I'm going to try (from CP)

/*void CRichEgView::OnReadin() <br />
{<br />
	CString sWriteText; //Where the text will be streamed from<br />
	sWriteText="Rich text is shown here in sample project";<br />
<br />
	// This is hard-coded for example purposes. It is likely this would<br />
	// be read from file or another source.<br />
	EDITSTREAM es;<br />
	es.dwCookie = (DWORD)&sWriteText; // Pass a pointer to the CString to the callback function<br />
	es.pfnCallback = MEditStreamInCallback; // Specify the pointer to the callback function<br />
<br />
	GetRichEditCtrl().StreamIn(SF_RTF,es); // Perform the streaming<br />
}<br />
<br />
  DWORD __stdcall MEditStreamInCallback(DWORD dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)<br />
{<br />
	CString *psBuffer = (CString *)dwCookie;<br />
<br />
	if (cb < psBuffer->GetLength()) cb = psBuffer->GetLength();<br />
<br />
	for (int i=0;i<cb;i++)<br />
	{<br />
		*(pbBuff+i) = psBuffer->GetAt(i);<br />
	}<br />
<br />
	*pcb = cb;<br />
<br />
	*psBuffer = psBuffer->Mid(cb);<br />
<br />
	return 0;<br />
}<br />
*/

Couple of Questions: OnReadIn() is not a function in response to a message right? I didnt see anything like that in the classwizard.

This std_call function. Do I need to include it in the h file?
Thanks,
ns

Inset Dialog Tab Order

Dov Sherman26-Jul-02 7:14

Dov Sherman

26-Jul-02 7:14

In my dialog window, I have inset a child dialog using this code in the main dialog's OnInitDialog(). Since SubclassDlgItem() can't be used with a CDialog, I have used this code to place it in the location of the CStatic item IDC_SINSET:

<br />
m_pFrameViewWnd = new CFrameViewDlg(this);<br />
m_pFrameViewWnd->Create(CFrameViewDlg::IDD,this);<br />
		<br />
GetDlgItem(IDC_SINSET)->GetWindowRect(r);<br />
ScreenToClient(r);<br />
m_pFrameViewWnd->MoveWindow(r.left,r.top,r.Width(),r.Height());<br />
m_pFrameViewWnd->ShowWindow(SW_SHOW);<br />
GetDlgItem(IDC_SINSET)->ShowWindow(SW_HIDE);<br />

There are more than forty various buttons and controls in the main dialog and the CStatic IDC_SINSET has a tab order of 12. However, no matter what the tab order of that static item is, the controls in the subdialog always seem to start only after all other controls in the main dialog. How can I make the controls in the subdialog have a tab order which is inserted at the same point in order as the static item to which the subdialog is assigned?

Re: Inset Dialog Tab Order

Ernest Laurentin27-Jul-02 12:39

Ernest Laurentin

27-Jul-02 12:39

1.Add your child dialog in the tab order, in your OnInitDialog, add a call to ModifyStyle(0, WS_TABSTOP);.
2.If you want to pass control to the next available control in the tab order of the main dialog, you need to extract that information from your child object (IDC_SINSET)
and set focus on it when the last control. You will need to overwrite PreTranslateMessage and call NextDlgCtrl of the main dialog.

how to pass in an index when LButtondown handler runs?

nss26-Jul-02 6:02

nss

26-Jul-02 6:02

I want to click on a (3rd party) picture box which has an image with a particular index in it. I want to pass this index into the Buttondownhandler for the picture box which has this signature:

void CTrain1View::OnLButtonDownThbimage3(long Keys, long x, long y) <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	<br />
}<br />

How would I do that?
Thanks

Re: how to pass in an index when LButtondown handler runs?

perlmunger26-Jul-02 19:20

perlmunger

26-Jul-02 19:20

First of all, you probably don't want to mess with the OnLButtonDown signature. I don't think that is the best approach. As far as I know there is no way to do what you are asking. Button handlers are implemented with callbacks using macros. There is no way that I can see to tell the macro to pass a variable to the button handler. Someone correct me if I'm wrong.

Since you're talking about a third party product, it's difficult to tell you the best way to do this without knowing the API for that product. If, for instance, your picture box handles it's own events (click, mouse over, etc.), the index for the current picture is probably being updated automagically. Just find a member function in your picture control ( GetIndex or something like that ), that tells you what the current picture index is. If, however, you have to handle the events on your own, it could be any number of possibilities. I don't think there's an easy answer for you in that case.

Here's a few questions you need to answer:
1. Where is the index for each picture getting stored?
2. Is the value of the current index being updated automatically by the control or is that something I have to do myself?
3. If the control does handle the updating of the index value, do I have a way to access the control member variable from my button handler?
4. Is there a member variable ( m_cPictureControl or something like that ) representation of the control? If not, use class wizard to create one.

That's the best I can offer. Good luck.

-Matt

------------------------------------------

The 3 great virtues of a programmer:
Laziness, Impatience, and Hubris.
--Larry Wall

CreatePrinterDC fails?

-Dy26-Jul-02 5:38

-Dy

26-Jul-02 5:38

I'm using the following to get the DC for the printer:

CDC dc;
if (!AfxGetApp()->CreatePrinterDC(dc))
  AfxMessageBox("unable to create dc")

But, it always returns FALSE. When I trace into it, it goes into CWinApp::CreatePrinterDC, and then into AfxCreateDC - but this returns NULL as hDevNames (CWinApp::m_nDevNames) is NULL (as is hDevMode).

What I'm a doing wrong?

Dylan Kenneally
London, UK

CRecttraker with CScrollview

g-sus26-Jul-02 5:19

g-sus

26-Jul-02 5:19

I want to use the CRectTracker for tracking objects and the the CScrollView for scrolling the Document, but , every time I scroll the current tracked object out of sight and in again the tracker is not redrawn, anyone suggestions ?

My CListCtrl & Ownerdata

26-Jul-02 5:16

I have several CListCtrl which display over 50000 items. So i created my own CListCtrl with LVS_OWNERDATA so i can handle the memory myself. It works fine except for one simple thing...

the MFC CListCtrl posts a message if an SetItemText is called on an item which is selected. I added

<br />
int CMyListCtrl::SetItemText(int iItem, int iSubItem, LPCSTR txt) {<br />
// Set Data here<br />
...<br />
// Send Message<br />
NM_LISTVIEW nmlv;<br />
nmlv.hdr.hwndFrom = m_hWnd;<br />
nmlv.hdr.code = LVN_ITEMCHANGED;<br />
<br />
nmlv.iItem = iItem;<br />
nmlv.iSubItem = iSubItem;<br />
SendMessage(this->m_hWnd, LVN_ITEMCHANGED, 0, (LPARAM)&nmlv)<br />
return iItem;<br />
}<br />

to my costum SetItemText function but it doesnt work...
the item changed events are sent if i click on an item

Any Ideas?

Thanks for your help

Eibwen

does the forum belong to ...

includeh1026-Jul-02 4:33

includeh10

26-Jul-02 4:33

does the forum belong to microsoft? otherwise to whom?

thx

Confused | :confused:

includeh10

Re: does the forum belong to ...

benjymous26-Jul-02 5:25

benjymous

26-Jul-02 5:25

http://www.codeproject.com/info/about.asp[^]

--
Help me! I'm turning into a grapefruit!

Re: does the forum belong to ...

Alexandru Savescu26-Jul-02 10:52

Alexandru Savescu

26-Jul-02 10:52

Can't you tell that it's part of the Linux/Unix world?. It's elementary! Smile | :)

Best regards,
Alexandru Savescu

Creating new controls and handling events

jparsons26-Jul-02 4:20

jparsons

26-Jul-02 4:20

I've recently been given the task of modularizing our main dialog class in a project at work. Currently I am creating a sub-class of CTreeCtrl called Gallery which will be used to wrap the basic functionality of our Tree control.

Here are the steps I have taken. I created CGallery as a subclass of CTreeCtrl. I used the class wizard to change the CTreeCtrl object in our main Dlg be the member variable of type CGallery called m_gallery.

Here is the problem. How can make it so that events are passed to my instance of CGallery and not to my main Dialog. I know I'm overlooking something obvious but this is my first time dealing with VC++ and I'm quite lost. Any help would be greatly appreciated.

Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n

Re: Creating new controls and handling events

jparsons26-Jul-02 4:29

jparsons

26-Jul-02 4:29

I found the answer. In the Class wizard when I was selecting which Control ID to handle events for I should have clicked on the Control name and not the ID that was an instance of it.

Jared
jparsons@jparsons.org
www.prism.gatech.edu/~gte477n

Re: Creating new controls and handling events

Tomasz Sowinski26-Jul-02 4:30

Tomasz Sowinski

26-Jul-02 4:30

jparsons wrote:
How can make it so that events are passed to my instance of CGallery and not to my main Dialog.

You mean events like TVN_* notifications? If this is the case, you'll need to use so-called message reflection. In ClassWizard add CGallery handlers for messages marked with '='.

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

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

Printing

Anthony988726-Jul-02 3:47

Anthony9887

26-Jul-02 3:47

I'm having trouble printing a document that is more than one page in length. ie (3 pages). It only prints the first page. What am I doing wrong.

Please Help, thanks

Re: Printing

C^hris L^osinger26-Jul-02 4:20

C^hris L^osinger

26-Jul-02 4:20

are you using the CDC::StartPage / EndPage calls?

-c

To explain Donald Knuth's relevance to computing is like explaining Paul's relevance to the Catholic Church. He isn't God, he isn't the Son of God, but he was sent by God to explain God to the masses.
/. #3848917

Fractals!

Re: Printing

Anthony988726-Jul-02 5:07

Anthony9887

26-Jul-02 5:07

Yes, I'm reading the contents of a listview box inside the StartPage and EndPage.

Re: Printing

C^hris L^osinger26-Jul-02 5:08

C^hris L^osinger

26-Jul-02 5:08

are you calling StartPage at the beginning of each page?

-c

Fractals!

Re: Printing

Anthony988726-Jul-02 5:28

Anthony9887

26-Jul-02 5:28

Do you have any code sample on what it should look like. This is very new to me.

Re: Printing

C^hris L^osinger26-Jul-02 5:33

C^hris L^osinger

26-Jul-02 5:33

the code roughly goes like this:

StartDoc
While (pages_to_do)
  StartPage
  PrintPage
  EndPage
EndDoc

the hard part, is setting pages_to_do - it requires you to keep track of how much you've printed compared to the size of the page.

do an MSDN search on "startdoc" - there are a lot of printing articles.

-c

Fractals!

BizTalk::SubmitSynch - Help!

Ed K26-Jul-02 3:44

Ed K

26-Jul-02 3:44

Has anyone had any experience using BizTalk synchronously? We need to send a message to BizTalk and receive a reply including results of the message. Documentation in this area is very sparse as is the MS way Confused | :confused:

If you don't but know somebody that does....please send them my way!

Thanks!

ed

gethostbyname

Konst26-Jul-02 3:37

Konst

26-Jul-02 3:37

why "gethostbyname" can sometimes return WSAHOST_NOT_FOUND while the pc is connected to the internet and the destination www-site should be shurely accessible? Confused | :confused:

Re: gethostbyname

Joaquín M López Muñoz26-Jul-02 3:54

Joaquín M López Muñoz

26-Jul-02 3:54

gethostbyname will not be able to retrieve the IP address of a server in Internet if you're connected to it through a HTTP proxy.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

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