Re: Printing - C / C++ / MFC Discussion Boards

Creating new controls and handling events

jparsons26-Jul-02 4:20

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

Re: gethostbyname

Konst26-Jul-02 4:04

Konst

26-Jul-02 4:04

Thanks!
Can you give any advice or link to the sample code that solves the problem?

Calendar Control Doesn't Redraw Self

JennyP26-Jul-02 3:27

JennyP

26-Jul-02 3:27

Hello,

I have a calendar control that will not redraw itself until I move the application window (click on date and nothing happens, then, move window and date changes to what I clicked on). It's located on a dialog bar whoose parent is CMainFrm. If I call UpdateData(FALSE) on ANOTHER dialog bar I have (same parent), then the calendar control starts working as normal. I would like my calendar control to begin working (updating/redrawing itself) immediately. I suspect that my windows messages are not being routed correctly?

Any ideas? Thanks!

JennyP

Re: Calendar Control Doesn't Redraw Self

perlmunger26-Jul-02 19:25

perlmunger

26-Jul-02 19:25

What calendar control are you using. Is it a third party control or the basic run-of-the-mill control found in the Visual C++ resource toolbox?

-Matt

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

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

Re: Calendar Control Doesn't Redraw Self

JennyP27-Jul-02 5:10

JennyP

27-Jul-02 5:10

Hello,

Thanks for the reply. I'm using the VC++ standard CMonthCalendar control. It really looks to be the entire DialogBar that is not being updated. For example, if I run the program and let it sit in its original state (no clicking on it or using the application in any way), and the screen saver turns on, when I wake-up the computer, there is a large black rectangle where the DialogBar should be.

JennyP

Re: Calendar Control Doesn't Redraw Self

perlmunger27-Jul-02 7:06

perlmunger

27-Jul-02 7:06

This is strange to me. Let me get a few things straight:

1. Is the calendar control on the dialog bar itself? If not, where is it?
2. Have you overriden *ANY* painting/drawing methods at all. If so, which ones and what does your code look like?
3. How did you add your dialog bar to the project?
4. Is your application an MDI or SDI?

Let me know.

-Matt

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

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

Re: Calendar Control Doesn't Redraw Self

JennyP27-Jul-02 15:25

JennyP

27-Jul-02 15:25

perlmunger wrote:
1. Is the calendar control on the dialog bar itself? If not, where is it?
2. Have you overriden *ANY* painting/drawing methods at all. If so, which ones and what does your code look like?
3. How did you add your dialog bar to the project?
4. Is your application an MDI or SDI?

Thanks for your reply, Matt....

4. MDI.

1. The calendar control was created with the VC++6.0 dialog editor to be part of the Dialog.

2. I did override OnCreate in the DialogBar with the following. (Sorry, I couldn't get the tabs to copy over.)

int CDiagGlobalSched::OnCreate(LPCREATESTRUCT lpCreateStruct) <br />
{<br />
	if (CDialogBar::OnCreate(lpCreateStruct) == -1)<br />
		return -1;<br />
	<br />
<br />
	// Create my own controls because it's easier to have them indexed.<br />
	int i;<br />
	CRect CERectHome(245, 8, 260, 25);<br />
	CRect CPRect(245, 54, 260, 96);<br />
	CRect CERect;<br />
	DWORD BaseStyle = WS_CHILD | WS_VISIBLE;<br />
	DWORD EditStyle = BaseStyle | ES_CENTER | ES_NUMBER;<br />
	for (i=0;i<21;i++) {<br />
		CERect = CERectHome;<br />
		m_CEDayOfWeek[i].Create(EditStyle | ES_READONLY | WS_EX_STATICEDGE,<br />
			CERect, this, 2000+i);<br />
		CERect.OffsetRect(0, 23);<br />
		m_CEDate[i].Create(EditStyle | ES_READONLY | WS_EX_STATICEDGE,<br />
			CERect, this, 2100+i);<br />
		CERect.OffsetRect(0, 70);<br />
		m_CEAllocated[i].Create(EditStyle | WS_TABSTOP, CERect, this, 2200+i);<br />
		CERect.OffsetRect(0, 23);<br />
		m_CEAvailable[i].Create(EditStyle | WS_TABSTOP, CERect, this, 2300+i);<br />
<br />
		m_CPProgress[i].Create(BaseStyle | PBS_SMOOTH | PBS_VERTICAL,<br />
			CPRect, this, 2400+i);<br />
<br />
		CPRect.OffsetRect(20, 0);<br />
		CERectHome.OffsetRect(20, 0);<br />
	<br />
	}<br />
<br />
<br />
	return 0;<br />
}

3. I used the following command in my main frame's OnCreate() function:

...
if (!m_SchedDlgBar1.Create(this, IDD_GLOBAL_DLG,
CBRS_ALIGN_TOP, AFX_IDW_DIALOGBAR))
{
TRACE0("Failed to create Sched dialogbar\n");
return -1;
}
m_SchedDlgBar1.UpdateData(FALSE);
...

Any further suggestions you can give would be greatly appreciated. Thanks!

JennyP

Re: Calendar Control Doesn't Redraw Self

perlmunger27-Jul-02 16:05

perlmunger

27-Jul-02 16:05

Some things that are done by the framework behind the scenes aren't very clear to me, however, in general I don't mess with the mechanisms Microsoft has set up to make your application development quicker. That being said, sometimes you have to do things yourself.

I'm not sure that you're really helping yourself by creating the controls manually. I've never done it this way, so I'm no expert on it. When I need an index of my controls, I just create an array with all of their resource IDs in it and iterate through that with GetDlgItem. While this is probably not your problem, I do wonder if there is something about adding a control (CEdit in your case) with the create method to a DialogBar. DialogBars inherit from CControlBar (which inherits from CWnd) rather than CDialog. While adding to a CWnd is acceptable, it is normally a CDialog where this would be done. Again, this may have nothing to do with your problem. Just food for thought, I suppose.

What I usually do when I want to add a dialog bar to my application is I use the Project | Add to Project | Componenets and Controls menu in Visual Studio. In the ensuing dialog box, open the "Visual C++ Components" folder and select the "Dialog Bar" component. Click Insert and then OK on the Dialog Bar creation dialog. This will automatically insert a new resource into the dialog resources. Just open the resource and drag and drop your componenets as needed just as in a normal dialog. It will work as expected out of the box because it was implemented within the framework.

So, where does this leave you? To be honest, I'm not sure exactly. It kind of depends on you. I will send you a demo project I created that does just this and you can view the code there. However, the components added to the dialog are done through the resource editor and not manually.

If I were you, I would backtrack until you can get it to update/repaint properly. A control should rarely need you to update the drawing for it, so your UpdateData(FALSE) method should never need to be called. Just remove controls until you see it update properly and then add them back in testing to see if they work as you go.

Best of luck to you and I hope that this had been helpful. Maybe someone who knows more about creating the controls manually could be more help to you. Let me know if you have other questions. I'd be glad to help you muddle through it any way I can Wink | ;-)

.

Best Regards.

-Matt

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

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

Re: Calendar Control Doesn't Redraw Self

JennyP27-Jul-02 18:51

JennyP

27-Jul-02 18:51

Hi Matt,

With your help, I was able to solve the issue. It turns out that my VC++ wizard put in "AFX_IDW_DIALOGBAR" to both of my dialog bars' nID fields (in the Create() method). I used your suggestion to roll my own nID's (in resource.h) and it worked.

In addition, I was able to remove UpdateData() from MainFrm.cpp which was really a cludge because my first dialog bar kept crashing the program if I didn't click on the document before the dialog bar. This was probably because the dialog bar wasn't properly initialized as in the first paragraph.

If you could offer some ideas of why VC++ put in AFX_IDW_DIALOGBAR instead of a new one, I'd appreciate it... Is this something I should do for all such items? Also, if I update resource.h manually, will the VC++ wizard try to use the same integer if I create a new resource later?

Finally, I'm manually creating (with no help from the dialog wizard) some edit controls because I'm wanting to draw them in a grid pattern on the dialog bar, and the dialog wizard just doesn't seem to get them exactly spaced equally (even using its space-even command).

Thanks for your help!

JennyP

Re: Calendar Control Doesn't Redraw Self

perlmunger27-Jul-02 19:46

perlmunger

27-Jul-02 19:46

>> If you could offer some ideas of why VC++ put in
>> AFX_IDW_DIALOGBAR instead of a new one, I'd appreciate it...
>> Is this something I should do for all such items? Also, if I
>> update resource.h manually, will the VC++ wizard try to use
>> the same integer if I create a new resource later?

This sounds like an anomaly to me. I've never had this problem before, but then again, I've never had two DialogBars in an app. I guess the best advice is to learn from the symptom so that you can quickly diagnose the problem next time.

Also, I've edited both resource.h and the .rc file manually before and found that, if you're careful, you can do this without causing any problems. I am almost completely certain that as long as you don't introduce duplicate items to resource.h yourself, whether by ID or name (which should be caught by the compiler), you should be fine. I believe VC++ re-parses the file to determine the next ID every time a new resource is added.

I'm glad you've solved your immediate problem, though. Best of luck to you and best regards. If you have any other questions, let me know.

-Matt

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

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

IHTMLDOMNode::put_nodeValue problem

pépé26-Jul-02 3:15

pépé

26-Jul-02 3:15

I use IHTMLDOMNode::put_nodeValue in a Browser Helper Object, but it crashes when I open a second instance of the browser. Someone already experienced this ?

help me

Anonymous26-Jul-02 3:13

Anonymous

26-Jul-02 3:13

virtual Key not affect

I try this in KeyDown function :
if (nChar == VK_RETURN) MessageBox("Test","Test",MB_OK);

but VK_RETURN not affect
please help me. thanks

Re: help me

Tomasz Sowinski26-Jul-02 3:17

Tomasz Sowinski

26-Jul-02 3:17

More source code post you must. Dialog window your window is?

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

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

Re: help me

lucy26-Jul-02 3:50

lucy

26-Jul-02 3:50

maybe try your code in OnChar()?

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