Option for an Exit - C / C++ / MFC Discussion Boards

how to display a file into CScrollView?

liuty200619-Apr-03 21:18

liuty2006

19-Apr-03 21:18

I want to display a text file into a view derived from CScrollView

how to display the file?

thanks!

Re: how to display a file into CScrollView?

Nish Nishant19-Apr-03 21:24

Nish Nishant

19-Apr-03 21:24

liuty2006 wrote:
I want to display a text file into a view derived from CScrollView

Any reason why you do not want to use CEditView?

Nish

"I'm a bit bored at the moment so I'm thinking about writing a new programming language" - Colin Davies

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Traversing between workspaces

Makover19-Apr-03 20:55

Makover

19-Apr-03 20:55

How can I skip from one workspace to another?

For example, <ctrl+tab> for skipping between files, <alt+tab> for skipping between applications (win 98).

i'm new

Mario_Young19-Apr-03 18:32

Mario_Young

19-Apr-03 18:32

hello my name is Mario Young i'm from Colombia and i like C++
Smile | :)

Re: i'm new

J. Dunlap19-Apr-03 18:37

J. Dunlap

19-Apr-03 18:37

Welcome!

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Re: i'm new

Nish Nishant19-Apr-03 19:24

Nish Nishant

19-Apr-03 19:24

Mario_Young wrote:
hello my name is Mario Young i'm from Colombia and i like C++

Hi Mario,

For non-programming questions you might wanna check out the Lounge :-

The Lounge

Welcome to CP anyway Smile | :)

Nish

Re: i'm new

Sendel20-Apr-03 1:53

Sendel

20-Apr-03 1:53

Strange name: "Mario Young i'm from Colombia and i like C++" Laugh | :laugh:

Welcome

Option for an Exit

Anonymous19-Apr-03 18:17

Anonymous

19-Apr-03 18:17

Dear Freinds,

I have to do a customization of a product.There are dll in that project.I wish to have an Exit option using Escape key.I tried it using WM_KEYDOWN message but it is working with other keys like "F!,HOME,END etc except ESPCAPE key.Why?

Please let me know the solution for it.

Thanking you in advance.

With Regards,

Adarsh

Re: Option for an Exit

Bartosz Bien20-Apr-03 4:32

Bartosz Bien

20-Apr-03 4:32

You may intercept it using the PreTranslateMessage function. Smile | :)

Regards,
BB

Re: Option for an Exit

Anonymous20-Apr-03 5:41

Anonymous

20-Apr-03 5:41

Dear Bartosz

Will you pleasee explain it in detail.I am new also to VC and i have to cutomize a product which has dlls.

I have tried WM_KEYDOWN:
if (wParam)
case:VK_F1:
ExitAppliaction();
return(0);
case: VK_ESCAPE:
ExitApplication();
return(0);
It is working for F1 key but it is not working with Escape key.

So kindly give me the explanation.

Thanking you in advance..

With Regards,

Adarsh

I

Re: Option for an Exit

Bartosz Bien20-Apr-03 6:23

Bartosz Bien

20-Apr-03 6:23

Try this (SDI assumed):

BOOL CMainFreame::PreTranslateMessage(MSG* pMsg)<br />
{<br />
    if(pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_ESCAPE)<br />
    {<br />
        PostMessage(WM_QUIT);<br />
        return TRUE;<br />
    }<br />
<br />
    return CFrameWnd::PreTranslateMessage(pMsg);<br />
}

Regards,
BB

Toolbar Tooltips

DuFF19-Apr-03 14:41

DuFF

19-Apr-03 14:41

Hey,
I've made a toolbar for IE but I have one problem. I don't know how to add tooltips to my buttons. Could anyone point me in the right direction??

Thanks.

Re: Toolbar Tooltips

Michael Dunn19-Apr-03 18:00

Michael Dunn

19-Apr-03 18:00

Create the toolbar with the TBSTYLE_TOOLTIPS style, then handle the TTN_GETDISPINFO notification to provide the text for the tooltip.

--Mike--
Yeah, payin' the bills with my mad programming skillz.
Defraggin' my hard drive for thrills.
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Re: Toolbar Tooltips

cleathley19-Apr-03 19:09

cleathley

19-Apr-03 19:09

here is a bit code I just threw together.. ofcouse you would want to check the id of each controll and return a different string (either in the 80bytes allocated, or a pointer to one)

<br />
		case WM_NOTIFY:<br />
			{<br />
				LPNMHDR pnmhdr = (LPNMHDR)lParam;<br />
				switch (pnmhdr->code)<br />
				{<br />
					// tooltip notify<br />
					case TTN_GETDISPINFO:<br />
					{<br />
						LPNMTTDISPINFO lpnmtdi = (LPNMTTDISPINFO) lParam;<br />
						if (lpnmtdi->hdr.idFrom == IDC_XXXX)<br />
						{<br />
							strcpy(lpnmtdi->szText, "hello");<br />
							lpnmtdi->uFlags = TTF_DI_SETITEM;<br />
						}<br />
					}<br />
					break;<br />
				}<br />
			}<br />
			break;<br />

hope it helps

Re: Toolbar Tooltips

Nick Parker20-Apr-03 3:43

Nick Parker

20-Apr-03 3:43

Michael Dunn wrote:
Yeah, payin' the bills with my mad programming skillz.
Defraggin' my hard drive for thrills.

Calm down Mike. Poke tongue | ;-P

-Nick Parker

SQL statement parsing

alex.barylski19-Apr-03 14:35

alex.barylski

19-Apr-03 14:35

I'm writting one for fun and i've only just began to realize that it's quite a tricky process. The implementation i have used is probably not the best(nor is it finished) so i would like to here how maybe more experienced programmers have tackled similar tasks.

(is my lingo correct???)
I basically parse the statement into the following token categories:
1) Command token (SELECT, CREATE, etc)
2) Fields token (mytable.name, etc)
3) Tables token
4) Expression token (mytable.name = 'test')
5) Misc token(s) (ORDER BY, LIMIT, etc)

Once the statement is parsed into the following categories some tokens are further parsed by another parsing engine, like expression tokens will later be passed to an Expression evaluator where again it will be broken down into smaller tokens like < = > + * /, etc...

Anyways, from whats been said, does it sound like i'm on the right track???

Oh yeah, heres another important part:

I start parsing by extracting the COMMAND from the original string
So: SELECT * FROM temp WHERE name = 'Test'
Becomes: * FROM temp WHERE name = 'Test'

This is accomplished using the function CParse::ExtractCommand()

Then I would call CParse::ExtractFields() and so on...

Is there another way to accomplish this???

Any ideas???

Thanks Smile | :)

"Two wrongs don't make a right, but three lefts do!" - Alex Barylski Smile | :)

Re: SQL statement parsing

Toni7819-Apr-03 15:01

Toni78

19-Apr-03 15:01

I have written parsing routines a couple of years ago to parse circuit descriptions, and let me tell you that it gets really tricky. At that time I remember that I started doing some readings on parsers, compilers, etc and they would use graph theory which I must say I have no clue how to use it. I mean I kind of know the basics from my math classes but that's about it. However, the approach that you are using for your SQL parsers is something that works just fine because most of us (my friends and I) followed the same logic to parse circuit descriptions.

// Afterall I realized that even my comment lines have bugs

Re: SQL statement parsing

alex.barylski20-Apr-03 17:05

alex.barylski

20-Apr-03 17:05

Interesting... Smile | :)

"Two wrongs don't make a right, but three lefts do!" - Alex Barylski Smile | :)

mfc dll <-> app communication

eXplodus19-Apr-03 11:48

eXplodus

19-Apr-03 11:48

little question.

is there a chance to get a pointer back to the application.
and to use the functions of the application?
or to get data from the application.

or is the only way to send messages?

how could i communication between the dll and the application.
i could call a dll function.
but how is it if a export a view and wanna call a function from the mainframe or from
the document class?

any ideas?

Re: mfc dll <-> app communication

valikac19-Apr-03 12:15

valikac

19-Apr-03 12:15

The DLL has a message queue. Handle the incoming message.

Kuphryn

Re: mfc dll <-> app communication

Neville Franks19-Apr-03 12:29

Neville Franks

19-Apr-03 12:29

Well you can pass a pointer from the app to the DLL and then it can use that. If the functions are in your CMainFrame class et.all. then you can use MFC functions in your DLL to get a ptr to these.

Another alternative is "Calling an Exported Function in an EXE from Within a DLL" http://codeguru.earthweb.com/dll/ExportingFromExe.html[^]

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

Re: mfc dll <-> app communication

Bartosz Bien20-Apr-03 4:37

Bartosz Bien

20-Apr-03 4:37

As you import functions from DLL to your application, and not the other direction, application-defined classes should not be called by the DLL.

Use MFC extension DLL to export a view class for your app's framework.

Regards,
BB

Re: mfc dll <-> app communication

eXplodus21-Apr-03 4:14

eXplodus

21-Apr-03 4:14

thats ok, and how did i got a pointer back to my app? and (myApp*) AfxGetApp() ??

Re: mfc dll <-> app communication

Bartosz Bien21-Apr-03 4:24

Bartosz Bien

21-Apr-03 4:24

1. Thou shalt not include CMyApp definition in a DLL.
2. You may use AfxGetApp() to send messages to your app, but I personally don't like such solutions - this is not what DLLs are for. Dead | X|

Regards,
BB

Re: mfc dll <-> app communication

eXplodus21-Apr-03 6:00

eXplodus

21-Apr-03 6:00

i know it.
but i need to get pointers back to my app.
and messages are a bad way. but the only way that i know

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