C / C++ / MFC

28-Aug-03 6:03

This should be a simple question, but how do you create a CRichEditCtrl for version 2.0/3.0 using either Create or CreateEx?

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 7:02

28-Aug-03 7:02

What specifically is not working for you? If the control's parent is a dialog, add a control variable to the dialog's .H file, and then in the dialog's OnInitDialog() method, add:

AfxInitRichEdit();<br />
richedit.Create(...);

Steve S28-Aug-03 7:08

Steve S

28-Aug-03 7:08

Might be that they're wanting specifically to create a richedit with Word-style paragraph formatting (left, centre, right, align). The default MFC way means that an old style rich edit is created all the time. In some cases, the way I've done this is in OnInitDialog to get the old one's attributes, trash it and recreate the control in place, before calling the default OnInitDialog in case that maps a control.

There are two Windows class names, "RichEdit" which is v1.0 and RICHEDIT_CLASS which expands at compile time to produce the appropriate name for v2 or later.

Steve S

Larry J. Siddens28-Aug-03 7:41

28-Aug-03 7:41

The AfxInitRichEdit() loads the RICHED32.DLL with is version 1.0. I want to load 2.0/3.0

Thanks

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 8:00

28-Aug-03 8:00

My bad. When I saw richedit32, I just assumed v3.2, not 1.0. You have to go to richedit20 in order to get v3.0. D'Oh! | :doh:

Are we confused yet? Confused | :confused:

So, the moral to your story is that the CRichEditCtrl class does not support the Rich Edit v2.0 control. In order to use Rich Edit 2.0 in an MFC application, call LoadLibrary() to load the Riched20.dll and access its functionality through the Win32 API. Hmmm

Larry J. Siddens28-Aug-03 8:06

28-Aug-03 8:06

So you use the LoadLibrary to load the riched20.dll and use the handle to set the fonts, formating, . . . Correct?

Can you place a small example. I have not called items from the library.

Thanks

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 8:41

28-Aug-03 8:41

HMODULE hLibrary = LoadLibrary("riched20.dll");<br />
<br />
m_richedit = CreateWindowEx(0, RICHEDIT_CLASS, "", WS_CHILD | WS_VISIBLE | ES_MULTILINE, 5, 50, 100, 100, GetSafeHwnd(), NULL, NULL, NULL);<br />
<br />
::SendMessage(m_richedit, WM_PASTE, 0, 0);

Larry J. Siddens28-Aug-03 8:44

28-Aug-03 8:44

You are loading the library to check if the riched20.dll is there correct? Now I have one more question. Have you been able to print that area correctly? If so, how? I'm trying to do that. The problem is that we don't know what the output device will be at the time of creation. Interesting twist huh?

Thanks again.

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 8:56

28-Aug-03 8:56

Use EM_SETTARGETDEVICE to set the target device. Then use EM_FORMATRANGE and EM_DISPLAYBAND to display the control's contents. See the MSDN article Q129860.

Larry J. Siddens28-Aug-03 9:00

28-Aug-03 9:00

Thats the caveat Dave, we don't know what the device is when the use uses it! What I'm currently doing is pulling each line out, scanning for font differences and using the TextOut to draw the text. Problem is that the font that shows up on the screen (fitting inside of a box) is either bigger or smaller than what was on the screen.

Kind of an interesting puzzle huh?

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 9:09

28-Aug-03 9:09

Ok, I'm a tad confused at this point. Are you wanting to take text from a rich edit control and send it to a printer? It sounds like you need to use GetDeviceCaps() to make sure the target device is setup like the rich edit control.

Larry J. Siddens28-Aug-03 9:33

28-Aug-03 9:33

Now I'm confussed? Confused | :confused:

How do you do that? See if the target device is set up like a rich edit? Am I getting too deep here? I wish I did know what the target device was when the users used it, but that is the requirement.

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

David Crow28-Aug-03 10:14

28-Aug-03 10:14

You have a rich edit control on a dialog or a form-based view. Yes? What are you wanting to do with the text in the control? As I understood your earlier post, you want to take the text in the control and send it to a printer. Yes?

Larry J. Siddens28-Aug-03 11:29

28-Aug-03 11:29

I actually sits within an area on a scrollview. Kind of like a text box in word. Then when the time comes, draw the text to the printer or some other device.

Sorry for the confustion.

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

Larry J. Siddens28-Aug-03 15:34

28-Aug-03 15:34

I want to output the text in a rich edit control (there are many on the same page) with the same format and fonts usage as in the Rich Edit control. I thought I could use the FormatRange, but since I don't know what the target device is when it is being used, I'm not sure if that would work. So, I was getting one line at a time, then spending time to scan character by character checking the fonts used. When the font changs, then I would save off the font and the text. I continue until the whole line is scanned and getting the height of the text to the baseline. Setting the output to use the base line as the y parameter and outputting it to the device. This is so ineffecient it isn't funny. Am I correct in using FormatRange? OR, could I use FormatRange along with DisplayBand to output line by line. Again, inefficient than doing the whole thing, but it would be better than doing character by character.

Thanks Dave.
Larry

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

Steve S28-Aug-03 22:24

Steve S

28-Aug-03 22:24

I do something very similar. For a billing application I wrote, a number of users wanted "word processing", so I use a commentary window which is a richedit.

I use FormatRange to step through appropriately sized chunks of the richedit, by working out what printable space there is (in twips), and making repeated calls, to build up a list of ranges (since it could be multi-page), more efficient than scanning the control's contents for changes (although it's similar to what the control is probably doing internally).

Steve S

Larry J. Siddens29-Aug-03 2:23

29-Aug-03 2:23

Did you use the SetTargetDevice to make it WYSIWYG? The problem I'm having (or maybe I'm just making it harder than it really is) is that I don't know what tht output device will be at the time they enter in the data.

Thanks for the Reply and info Steve.
Larry

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

Larry J. Siddens29-Aug-03 5:22

29-Aug-03 5:22

I have tried using the SetTargetDevice with the width of the window (in TWIPS) and getting the printer DC. The text is coming out in the proper format (line breaks and all), but the graphics that surround that are not.

As an example, I place a line just to the end of the line, then do a print preview and the text extends past this line. I can send the test code that I'm playing with so you can see what I'm seeing.

I am also getting conviced to do WYSIWYG, I really do need the output device to do the formatting. With out the device, what I need to do is seeming more and more impossible without a lot of fudging!

Thanks you Guys.
Larry

Larry J. Siddens
Cornerstone Communications

TAME THE DOCUMENT MONSTER
www.unifier.biz

Exchanging Data

Rage28-Aug-03 5:51

Rage

28-Aug-03 5:51

Hi!

I need to exchange data from MFC Dialog A to MFC Dialog B. What I tried is using Messages (like WM_COPYDATA, or user messages (registered/Not registered)) to pass an address of a struct where I have put ma data, but without success. The message never arrives, and I think the problem is that I do not have the handle of B in A, and the ::SendMessage (Or PostMessage) needs a hWnd as first parameter. HWND_BROADCAST instead did not bring anything ...

I only need to pass 1 struct, so I do not want to Use a CMemFile...

Please, CPians, help ... many thanks...

~RaGE();

Re: Exchanging Data

David Crow28-Aug-03 7:05

28-Aug-03 7:05

Rage wrote:
...pass an address of a struct...

Is this struct created on the heap or the stack?

Rage wrote:
The message never arrives, and I think the problem is that I do not have the handle of B in A, and the ::SendMessage (Or PostMessage) needs a hWnd as first parameter.

You are correct. Without a window handle, Windows does not know to whom the message is to be delivered.

Re: Exchanging Data

Rage28-Aug-03 8:38

Rage

28-Aug-03 8:38

DavidCrow wrote:
Is this struct created on the heap or the stack?

on the heap.

DavidCrow wrote:
You are correct. Without a window handle, Windows does not know to whom the message is to be delivered.

Any idea how to get that handle ? Is there any simpler way that using EnumWindow or FindWindow ?

Thanks for your answer.

~RaGE();

Re: Exchanging Data

David Crow28-Aug-03 8:54