C / C++ / MFC

Re: CWnd::OnNCPaint - how can i draw scrollbar myself ??

5-Mar-02 11:58

Well, it depends. 'Internal' scrollbars maintained by Windows are drawn outside client rect. If you create them yourself as controls, they will cover parts of client area.

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

alex.barylski5-Mar-02 13:31

alex.barylski

5-Mar-02 13:31

If internal scrollbars are drawn outside the client rect, this means they shouldn't flicker right..?

I've never actually used internal scrollbars...i've always liked the freedom of adding buttons between the scrollbars. However they are usually created inside the client area and get redrawn on every invalidate() which causes crazy flicker. Do the system scrollbars flicker? Cuz i'd do away with my buttons for the trade off of no flicker.

Cheers!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: CWnd::OnNCPaint - how can i draw scrollbar myself ??

Jon Hulatt6-Mar-02 5:45

Jon Hulatt

6-Mar-02 5:45

The reason they flicker is that you're drawing the client area and then windows draws the scrollbars on top.

Theres an article somewhere on MSDN about why scrollbars are drawn internally and hence can't be customised.

when i did a sort of skinned app, the only way i could get scroll functionality with nice looking scroll bars was to bodge a CFormView onto my dialog, and then use a custom written control to be a scrollbar, and scroll the view window internally. it was messy but it worked.

jon

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Re: CWnd::OnNCPaint - how can i draw scrollbar myself ??

alex.barylski5-Mar-02 11:32

alex.barylski

5-Mar-02 11:32

I don't think you can paint the scrollbars yerself in the OnNCPaint...

You probably have to derive clases from CScrollBar make them owner drawn and do it that way.

Cheers!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Function Call Prob

Peter Liddle5-Mar-02 11:11

Peter Liddle

5-Mar-02 11:11

Hey guys

The function below is being called by rundll32.exe but whenever i run it i get a memory violation saying :-

The instruction at "0x77f52ff9c" referenced memory at "0x002e2afd. The Memory could not be "read"

// DLLVerifySignature - Allows Verification on double click
bool DLLVerifySignature(HWND hwnd, HINSTANCE hinst, LPTSTR sFileNameAndPath, int nCmdShow)
{
CFullCryptFunc FullCrypt;

FullCrypt.FullVerifySignature(sFileNameAndPath);

FullCrypt.~CFullCryptFunc();

return TRUE;
}

The funtion i call in the FullCrypt class works fine as when i call it from another part of the program i have no problems im guessing that teh problem occurs because the software is not properly initalised when it trys to call this.

Peter

Re: Function Call Prob

Tomasz Sowinski5-Mar-02 11:23

5-Mar-02 11:23

You'll have to dig deeper - run your .dll under a debugger. Use rundll32.exe as 'Executable for debugging session' under Project Settings/Debug.

When the program crashes, you'll be able to have a look at the stack, local variables, globals, etc.

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

another quickie

tbbooher5-Mar-02 9:43

5-Mar-02 9:43

So i have a char[20] like "foo foobar foo2" and I want to get

A = "foo"
B = "foobar"
C = "foo2"

if the words could be any length, what is the best way to do this?

tim

---------------------------------------
Tim Booher

Tomasz Sowinski5-Mar-02 9:50

5-Mar-02 9:50

strtok is the key to nirvana...

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

tbbooher5-Mar-02 9:50

5-Mar-02 9:50

what about the extraction operator:

char curRecord[20];
char cDay[3];

while(!osMyFile.eof()) // we go through each line in the file
{
     osMyFile.getline(curRecord,20); // read time value
     curRecord >> cDay;
     cout << curRecord << "\t" << cDay << endl;
}

---------------------------------------
Tim Booher

Tomasz Sowinski5-Mar-02 9:59

5-Mar-02 9:59

Will work, but you'll need strstream.

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

tbbooher5-Mar-02 10:16

5-Mar-02 10:16

i am sorry, but i don't get it what do you mean?

---------------------------------------
Tim Booher

Tim Smith5-Mar-02 10:21

Tim Smith

5-Mar-02 10:21

He is just saying that strtok is a nice simple routine while strstream is this huge library with a lot of extra baggage.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

ALMOST THERE

tbbooher5-Mar-02 10:30

5-Mar-02 10:30

o.k. so I have:

while(!osMyFile.eof()) // we go through each line in the file
{
  osMyFile.getline(curRecord,20); // read time value
  ins >> intDay;
  ins >> intTime;
  ins >> strOnBay;
  cout << intDay << "\t" << intTime << "\t" << strOnBay << endl;
}

this is so close to working -- the only problem is that, while it loops through the file, it keeps putting the same value in intDay, intTime and strOnBay each time . . . (i.e. they never change)

thanks,

tim

---------------------------------------
Tim Booher

Re: ALMOST THERE

Joaquín M López Muñoz5-Mar-02 11:24

Joaquín M López Muñoz

5-Mar-02 11:24

Where did that ins come from? Rewrite your code like this:

...
osMyFile.getline(curRecord,20); // read time value
<font color=#ff0000>istringstream ins(curRecord);</font>
ins >> intDay;
...

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: ALMOST THERE

tbbooher5-Mar-02 12:53