C / C++ / MFC Discussion Boards

Subrahmanyam4-Mar-03 7:22

4-Mar-03 7:22

Hi I am trying to create a chat window like yahoo messenger's chat window.

I am interested to know how to write a component which can show text in different colors and different points.

SPY indicates that yahoo uses a component with classname "ATL:0054E0E0"

is this some standard ATL component?

Any pointers on how to write such component are highly appreciated.

Thank you.

Re: how to make yahoo like chat window?

User 66584-Mar-03 7:37

User 6658

4-Mar-03 7:37

I don't know how the window looks like since I don't use this messenger. But if you want colored text in different fonts then you can use the CRichEditCtrl, which wordpad uses as well (as far as i know)

regards

modified 12-Sep-18 21:01pm.

Re: how to make yahoo like chat window?

Abin4-Mar-03 18:06

Abin

4-Mar-03 18:06

And I'd like to know how to make the text box scroll down automatically after new text lines are added in in the bottom.

CListCtrl - Combine Colums - CustomDraw

AnTri4-Mar-03 7:04

AnTri

4-Mar-03 7:04

Hello, how can i combinate colums of a CListCtrl. I want to write Text across a full row not only in a cell.
Someone told me to use CustomDraw.... But how does it work?

Thanx a lot!

Re: CListCtrl - Combine Colums - CustomDraw

valikac4-Mar-03 9:07

valikac

4-Mar-03 9:07

The simplest solution is to implement a 1:1 box.

Kuphryn

Re: CListCtrl - Combine Colums - CustomDraw

AnTri4-Mar-03 9:38

AnTri

4-Mar-03 9:38

1:1 BOX????

Re: CListCtrl - Combine Colums - CustomDraw

valikac4-Mar-03 14:01

valikac

4-Mar-03 14:01

I mean multiple rows of 1 column each.

Kuphryn

Re: CListCtrl - Combine Colums - CustomDraw

AnTri5-Mar-03 5:07

AnTri

5-Mar-03 5:07

That doesnt work. I need the Colums. But the first and the last row should be a special row (a kind of header...)

GraphicsPath::Outline problem (GDI+)

grotesque4-Mar-03 5:22

grotesque

4-Mar-03 5:22

I'm having a problem with the Outline method not working after I've applied a certain transformation to the GraphicsPath object (see code below). The problem occurs after the GraphicsPath object is scaled with either the X factor or/and the Y factor set to a negative value (causing flip/mirror).

Code:

GraphicsPath path1;
GraphicsPath path2;

path1.AddString(L"GDI+", -1, &family, FontStyleRegular, 144, rect, &format);
path2.AddString(L"GDI+", -1, &family, FontStyleRegular, 144, rect, &format);

REAL offsetX = rect.GetLeft() + rect.Width / 2.0f;
REAL offsetY = rect.GetTop() + rect.Height / 2.0f;

Matrix matrix;
matrix.Translate(-offsetX, -offsetY, MatrixOrderAppend);
matrix.Scale(1.0f, -1.0f, MatrixOrderAppend);  // negative Y factor causing
                                                    // the path to "flip"
matrix.Translate(offsetX, offsetY + 110.0f, MatrixOrderAppend);

path2.Transform(&matrix);

Pen pen(Color(255, 255, 0, 0));

path1.AddPath(&path2,TRUE);
path1.Outline();   // fails due to the scaling transformation above
                        // the shapes overlap instead om "melting together"

pGraphics->DrawPath(&pen, &path1);

Any light on this problem would be much appreciated. Smile | :)

(Using VC 6.0 and the C++ version of GDI+)

AfxBeginThread

Anonymous4-Mar-03 5:15

Anonymous

4-Mar-03 5:15

I need help with AfxBeginThread.
I'm trying to use it but get error.

I have a function that does the processing in my program. It doesn't take any paramaters. How can I execute it as a threat in my MFC application?

Help!

Fr

Re: AfxBeginThread

Brian Shifrin4-Mar-03 5:33

Brian Shifrin

4-Mar-03 5:33

Something like this will work

void CMyClass::StartNewThread()
{
m_hThread = reinterpret_cast<handle>(
_beginthreadex( NULL, NULL, &_ThreadFunc,
this, CREATE_NORMAL, &dwThreadID ));
}

unsigned _stdcall CMyClass::_ThreadFunc( LPVOID arg )
{
CMyClass *pWrker = (CScrCMyClass *)arg;
pWrker->TheadFunct();
return 0;
}

Re: AfxBeginThread

Anonymous4-Mar-03 5:38

Anonymous

4-Mar-03 5:38

Is this compatible with MFC?

Re: AfxBeginThread

Brian Shifrin4-Mar-03 7:19

Brian Shifrin

4-Mar-03 7:19

If you are manipulating MFC object from this thread derive your class from CWinThread. If not code I posted works just fine. Just don't use CreateThread because of CRT....

Brian

Re: AfxBeginThread

Anders Molin4-Mar-03 14:47

Anders Molin

4-Mar-03 14:47

When _ThreadFunc is a class member function it have to be a static function becaude of the this pointer passed to all non-static memberfunctions.
Your example will not compile unless it's declared as static.

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: AfxBeginThread

Anonymous7-Mar-03 0:41

Anonymous

7-Mar-03 0:41

thanks so much!

Overriding Tab Key

brianwelsch4-Mar-03 5:05

brianwelsch

4-Mar-03 5:05

I've got an EditView, and I would like to change the behaviour of the tab key.

I want to pad my own spaces depending on where I am.

The changes applied in OnChar(), are apparently too late in the process. Can someone tell me where I can stop tab from tabbing?

Or should I just select the last character in OnChar(), and overwrite it with the spaces I want?

Thanks!

BW
"We get general information and specific information, but none of the specific information talks about time, place or methods or means..."
- Tom Ridge - US Secretary of Homeland Security

Re: Overriding Tab Key

Brian Shifrin4-Mar-03 5:19

Brian Shifrin

4-Mar-03 5:19

Override PreTranslateMessage
if ((pMsg->message == WM_KEYDOWN) && (pMsg->wParam == VK_TAB))
{
...
}

do something

Re: Overriding Tab Key

brianwelsch4-Mar-03 5:35

brianwelsch

4-Mar-03 5:35

That got me to process before the 'Tab'(which is new to me Smile | :)

), but does not stop the tab from processing.

I've opted to delete the tab, after the fact, and place the spaces I need.

Thanks for your help!

BW
"We get general information and specific information, but none of the specific information talks about time, place or methods or means..."
- Tom Ridge - US Secretary of Homeland Security

Re: Overriding Tab Key

Brian Shifrin4-Mar-03 7:15

Brian Shifrin

4-Mar-03 7:15

>but does not stop the tab from processing.

did you return from preTranslateMessage, or still called baseClass::PreTranslate()? Sounds to me you are still calling view baseclass with PreTranslate.

Brian

Re: Overriding Tab Key

brianwelsch4-Mar-03 7:23

brianwelsch

4-Mar-03 7:23

My understanding was to implement this way, and it would "short-cicuit" normal VK_TAB behaviour. Did I screw it up?

BOOL CQS1EditView::PreTranslateMessage(MSG* pMsg) <br />
{<br />
	if ((pMsg->message == WM_KEYDOWN) && (pMsg->wParam == VK_TAB)) <br />
	{ <br />
           .... do stuff <br />
	}<br />
	else<br />
	   return CEditView::PreTranslateMessage(pMsg);<br />
}<br />

BW
"We get general information and specific information, but none of the specific information talks about time, place or methods or means..."
- Tom Ridge - US Secretary of Homeland Security

Re: Overriding Tab Key

Chris Richardson4-Mar-03 8:06

Chris Richardson

4-Mar-03 8:06

Return TRUE from PreTranslateMessage if you don't want the message to be dispatched. If you are already doing this in your ".... do stuff" section, I'm not sure what the problem is.

Chris Richardson

C/C++ Include Finder[^]

Re: Overriding Tab Key - DONE

brianwelsch4-Mar-03 8:27

brianwelsch

4-Mar-03 8:27

Chris Richardson wrote:
Return TRUE

Blush | :O

hehe, oops. Thanks Chris

BW
"We get general information and specific information, but none of the specific information talks about time, place or methods or means..."
- Tom Ridge - US Secretary of Homeland Security

Re: Overriding Tab Key - DONE

Chris Richardson4-Mar-03 8:41

Chris Richardson

4-Mar-03 8:41

No problem, glad it's working Smile | :)

Chris Richardson

C/C++ Include Finder[^]

How to reload a modified CDocument

luedi4-Mar-03 4:57

luedi

4-Mar-03 4:57

Hi,

in a SDI application I want to reload a document that was modified with CDosument::SetModified (TRUE) by clicking on the document in the MRU list. But the framework will recognize the document as already beeing loaded and only activates it as current active document again. There seems to be also no simple method to override to allow such a behavoir.

Two functions are involved in this:
CDocManager::OpenDocumentFile and CDocTemplate::MatchDocType

Both are virtual but both are also non trivial.

This function does not belong into the CDocTemplate, since I would like to have it for all Documents in a MDI Application. But this function isn't trivial at all.

Finally I have CWinApp::OnOpenRecentFile. But this isn't a real option also.

Is there any simple way to do this?

Thanks
Dirk

Re: How to reload a modified CDocument

Alvaro Mendez4-Mar-03 9:08

Alvaro Mendez

4-Mar-03 9:08

I took a look at your problem, and it seems like there's no simple way to do this. You need to derive from the DocManager class being used -- it's probably CFileDialogDocManager but look in your InitInstanstance for the exact name. Then you can override the OpenDocumentFile and pretty much copy the whole thing from the base class, except the part that checks the file's name. Well, you actually do want to check the file name so you can close the existing document.

It's not bad, just not very pretty. BTW, don't forget to change InitInstance.

Regards,
Alvaro

There are no stupid questions, but there are a lot of inquisitive idiots. -- despair.com

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