File association launched app... - C / C++ / MFC Discussion Boards

Chris Meech7-Feb-03 8:42

7-Feb-03 8:42

You might try using EnumWindows API. Compare the PID of each top-level window to the one you are searching for.

Chris Meech

"what makes CP different is the people and sense of community, things people will only discover if they join up and join in." Christian Graus Nov 14, 2002.

"AAAAAAAAAHHHHHH!!!!! Those leaks are driving me crazy! How does one finds a memory leak in a garbage collected environment ??! Daniel Turini Nov. 2, 2002.

Can't get FrameRgn() to work! :(

Rickard Andersson²⁰7-Feb-03 6:44

Rickard Andersson²⁰

7-Feb-03 6:44

I've tried this but it doesn't work:

HDC dc = GetDC(wndMainWin);

HRGN r = CreateRoundRectRgn(1,1,WND_WIDTH-1,WND_HEIGHT-1,10,10);
SetWindowRgn(wndMainWin, r, TRUE);

HBRUSH br = CreateSolidBrush(RGB(0,255,0));
FrameRgn(dc, r, br, 10, 10);

DeleteObject(r);
ReleaseDC(wndMainWin,dc);

It's my main window I'm trying to put a black frame on.
What am I doing wrong here?

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Can't get FrameRgn() to work! :(

Paul M Watt7-Feb-03 12:07

Paul M Watt

7-Feb-03 12:07

Are you doing this in your Erasebackground or WM_PAINT handler. Possibly what you are writing is getting erased?

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Can't get FrameRgn() to work! :(

Rickard Andersson²⁰8-Feb-03 1:54

Rickard Andersson²⁰

8-Feb-03 1:54

Neither of them!
I want the user to choose if he want a round window with black frame or the standard region.

If I mark a flag and then call WM_PAINT/WM_ERASEBK.. then it should work if my WM_PAINT/WM_ERASEGk.. check if the user want round window or not?

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Can't get FrameRgn() to work! :(

Mike Nordell8-Feb-03 7:15

Mike Nordell

8-Feb-03 7:15

Rickard Andersson wrote:
What am I doing wrong here?

Not reading the documentation?

After a successful call to SetWindowRgn, the system owns the region specified by the region handle hRgn. The system does not make a copy of the region. Thus, you should not make any further function calls with this region handle. In particular, do not close this region handle.

Your code violates both of the the only two documented restrictions.

Re: Can't get FrameRgn() to work! :(

Rickard Andersson²⁰8-Feb-03 9:39

Rickard Andersson²⁰

8-Feb-03 9:39

Mike Nordell wrote:
Not reading the documentation?

Not that careful...

Mike Nordell wrote:
Your code violates both of the the only two documented restrictions

Which means? Unsure | :~

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Can't get FrameRgn() to work! :(

Mike Nordell9-Feb-03 2:26

Mike Nordell

9-Feb-03 2:26

Rickard Andersson wrote:
Mike Nordell wrote:
Your code violates both of the the only two documented restrictions

Which means?

That your code did both of the only two documented things discouraged and/or forbidden.

Your displayed code, after a (hopefully) successful call to SetWindowRgn:

1) did use the region handle.
2) deleted the region.

I wouldn't expect 1 to make (that much of) a difference in this case, but 2 sure does.

Let's visit the documented restrictions again, but this time I'll underline what I think are the important passages:

After a successful call to SetWindowRgn, the system owns the region specified by the region handle hRgn. The system does not make a copy of the region. Thus, you should not make any further function calls with this region handle. In particular, do not close this region handle.

File association launched app...

Dr Soong7-Feb-03 6:33

Dr Soong

7-Feb-03 6:33

I'm trying to figure out how to use a file passed or used to start my application when started by a file association through either double-clicking a data file or launched from an attachment from an email. The command line passes the pathname of the file that opened the app, however since the data file is locked I can not access the data through normal file opserations. Somehow the dataptr or filehandle is being passed or managed somewhere. Can someone explain how I can get access to that handle so I can read the data file?

Re: File association launched app...

Neville Franks7-Feb-03 10:02

Neville Franks

7-Feb-03 10:02

The app that is launching your app must have the file locked. If you start your app via. Explorer you shouldn't have a problem. There are different ways to lock a file (deny write, deny read, deny read/write) so you may still be able to read the file if you open it with the appropriate mode settings and you only need read access.

Neville Franks, Author of ED for Windows. www.getsoft.com
Make money with our new Affilate program

Re: File association launched app...

Dr Soong7-Feb-03 12:17

Dr Soong

7-Feb-03 12:17

The system is launching my app passing the datafile using a shell command or something. This does indeed lock the file, out of my control. If I only needed to worry about launches from explorer I coul dsimply assos the ext with a helper app that simply records he filename of interest and then launches my app after the file has been unlocked. I need to be able to get access to the data in the example of a launch from an email attach whereby the file itself is persistant only while the system launcher is running my app call.

Changing the color of a static text

Tom Wright7-Feb-03 5:19

Tom Wright

7-Feb-03 5:19

Is there a way for me to change to color of the font in a static text box?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Changing the color of a static text

AlexO7-Feb-03 5:27

AlexO

7-Feb-03 5:27

on WM_PAINT call SetBkColor. see MSDN for a sample

Re: Changing the color of a static text

Dr Soong7-Feb-03 8:46

Dr Soong

7-Feb-03 8:46

A really simple way of doing this and givng you control over quit a bit of the control is to subclass the CComboBox and override the OnCtlColor virtual funtion. Example of changing thetext color follows:

HBRUSH CMyComboBox::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
pDC->SetTextColor(RGB(255,255,0));
pDC->SetBkMode(TRANSPARENT);

return m_Brush;
}

In addition to chaging the text color, the disply mode will be transoarent so you don't have to worry about a background color, however, you could change that as well. The m_Brush being returned is a var that is defined in the constuctor so that the entire controls background uses that brush to paint the controls background.

This method can be used on any of the control, listbox, edit, ect.

Catching Exceptions in MFC

Tom Wright7-Feb-03 5:10

Tom Wright

7-Feb-03 5:10

Do I always have to set an exception class in my catch function to tell me whats going on? Also how do I know which CException to use? For instance for socket connections?

Thanks
Tom Wright

Tom Wright
tawright915@yahoo.com

Re: Catching Exceptions in MFC

AlexO7-Feb-03 5:34

AlexO

7-Feb-03 5:34

You do not have to set exception unless you want to.
CException provides interface to extract basic information for any MFC exception.
As far as I know CSocket does not throw specific exceptions.

Visual C++ wizard

De Nardis Andrea7-Feb-03 5:03

De Nardis Andrea

7-Feb-03 5:03

Hi folks, after many months passed in writing a suitable Visual C++ 6.0 wizard I realized that is completely incompatible with the Visual C++ .NET wizard model.Even the reference language is changed: from C++ to Jscript!!! Does anybody know a trick for quickly converting my code or even reuse it making it available in a COM DLL, or whatever?
Regards,
Andrea

how to set CListbox row height variable?

hamchoy7-Feb-03 4:52

hamchoy

7-Feb-03 4:52

Hi...

I'm trying to use a cListBox object, but the string that I'm displaying gets truncated when it is longer than the width of the listbox. I don't wan't to use a horizontal scroll, so i'm wondering how to make the displayed string continue on the next line. Can anyone tell me?

I've seen that there's a LBS_OWNERDRAWVARIABLE style - which includes that there are variable height involved with this, but creating a CListbox with this style only gives me an error message. Currently i'm using the LBS_STANDARD style. How do i use the LBS_OWNERDRAWVARIABLE one if this is the solution to my problem!?

Regards
Jeffrey

Re: how to set CListbox row height variable?

Roger Allen7-Feb-03 6:07

Roger Allen

7-Feb-03 6:07

Why not go the tooltip route, which shows the full line text when hovering over the truncated item?

http://www.codeproject.com/combobox/cexlistboc.asp[^]

Roger Allen
Sonork 100.10016

WHats brown and sticky?
A stick or some smelly stuff!

CPen

Ahmad997-Feb-03 3:55

Ahmad99

7-Feb-03 3:55

I want to write Bold data (28 points) on a Dialog...against a buutton click
here is code snippet
{
CPen pen;
pen.CreatePen(PS_SOLID,28,RGB(255,0,0));
CDC* pDC=GetDC();
pDC->SelectObject(&pen);
pDC->TextOut("Computer is the killer of nature");

}
it writes data but not bold and Selected color.. Can any one tell where I am doing wrong

Re: CPen

Joaquín M López Muñoz7-Feb-03 4:00

Joaquín M López Muñoz

7-Feb-03 4:00

It is not the pen you should change, but the font.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: CPen

Ahmad997-Feb-03 4:09

Ahmad99

7-Feb-03 4:09

how I change? tell me....

Re: CPen

Maximilien7-Feb-03 4:19

Maximilien

7-Feb-03 4:19

for example :

// m_Font is a class member of a dialog.

 m_Font.CreateFont( 15, 0, 0, 0, FW_BOLD, FALSE, FALSE, 0,
                    DEFAULT_CHARSET, OUT_CHARACTER_PRECIS,
                    CLIP_CHARACTER_PRECIS, DEFAULT_QUALITY,
                    DEFAULT_PITCH | FF_DONTCARE,  _T("Arial") );
...
// somewhere in the paint.
 HFONT hfontOld;
 hfontOld = (HFONT)SelectObject(dc.m_hDC, m_Font);
// do something... with the DC ( draw the text.
 ::SelectObject(dc.m_hDC, hfontOld);
...

Also, you can maybe search and enumerate the font name just in case "Arial" does not exists.

Max.

CTreeCtrl

will13837-Feb-03 3:51

will1383

7-Feb-03 3:51

Hi all,

I'm trying to implement an explorer type tree view that allows traversing of the drives. My problem is I'm trying to take into account if a removable drive, cdrom, etc. If theres nothing in the drive, then I want to move the selected item back to the previous one. Problem is, when trying to sift through msdn, it isn't clear how to change the states of the items (at least to me). Here's what I'm trying to do (in general):

NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*) pNMHDR;
CString strPath = GetPathFromItem (pNMTreeView->itemNew.hItem);
...
if ((hFind = ::FindFirstFile (strPath, &fd)) == INVALID_HANDLE_VALUE) {
CString temp = strPath + _T("is not accessible\n\nThe Device is not ready\n");
CString temp2 = _T("Exploring ") + strPath;
MessageBox(temp,temp2 ,MB_OK | MB_ICONERROR);
pNMTreeView->SetItemState(pNMTreeView->itemNew.hItem,TVIS_SELECTED,
pNMTreeView->SetItemState(m_prevSelection, // Then what?
} else {
this->m_prevSelection = pNMTreeView->itemNew.hItem;
}

You can see where I am confused, when setting the item states. Am I doing this correctly? What do I need to do in order to properly change the items selected.

Any help in the matter it greatly appreciated. thanks alot!

Dan Willis

Re: CTreeCtrl

Joaquín M López Muñoz7-Feb-03 3:59

Joaquín M López Muñoz

7-Feb-03 3:59

Set on:

SetItemState(hItem,TVIS_SELECTED,TVIS_SELECTED);

Set off:

SetItemState(hItem,0,TVIS_SELECTED);

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: CTreeCtrl

will13837-Feb-03 4:11

will1383

7-Feb-03 4:11

Ah. thank you.

Any ideas on how to check to see if there is a floppy or a cd in the corresponding drives? Seems I really should be checking for disc existance, not file existance on these drives.

Any suggestions?

Dan Willis

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