PropertyPage, OnInitDialog, and SetFocus - C / C++ / MFC Discussion Boards

palbano5-Jun-04 17:52

5-Jun-04 17:52

>> I know abotu fstream but I cant seem to get it to work..

Your in a school C++ course and no one can show you how to get fstream working? What school is it?

unsigned long score = 0L;

std::ofstream os("sample.txt");
score = 1000;
os << score;
os.close();

std::ifstream is("sample.txt");
is >> score;
is.close();

>. I am lookign for a pause function

::Sleep( 5000); // sleep for 5 seconds

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Reading/Writing Files

gabuchholz5-Jun-04 18:09

gabuchholz

5-Jun-04 18:09

Thanx, so much.
Got it working perfectly Blush | :O

P.S) Its a high school and we do things in Dev C++... which we had fstream workign in...vc++ is a bit different... WTF | :WTF:

Screen Resolution

Renjith Ramachandran5-Jun-04 17:07

Renjith Ramachandran

5-Jun-04 17:07

All resources of my application is designed in 1024 * 768 pixels resolution ,
after changing the resolution in to standard 800 * 600, some of the screen is beyond the visible area. i want to change my application in a manner that that must work in any resolution ( i found some applications do this very nicely ).
is there any code to do this?

and one more thing, how can i get the current resolution of screen and how can i change that by code?

Thankyou

I want to change Myself..Can u help me? Smile | :)

Re: Screen Resolution

palbano5-Jun-04 17:32

palbano

5-Jun-04 17:32

Well the main stream approach to building desktop applications is to use windowing techniques to avoid any specific screen resolution dependencies. If I ever installed a desktop application that changed my screen resolution on me I would get rid of it faster than you can say “bite me”.

With that said here is a controversial article to that end:

http://www.codeproject.com/gdi/screenresolution.asp[^]

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Screen Resolution

Renjith Ramachandran6-Jun-04 5:16

Renjith Ramachandran

6-Jun-04 5:16

i want an API/code for changing to any resolution that supported by my graphics card.

thank you.

I want to change Myself..Can u help me? Smile | :)

Re: Screen Resolution

User 66586-Jun-04 7:30

User 6658

6-Jun-04 7:30

ChangeDisplaySettings is what you want.

modified 12-Sep-18 21:01pm.

Re: Screen Resolution

alex.barylski5-Jun-04 18:32

alex.barylski

5-Jun-04 18:32

Just a guess, but I would figure you'd find the screen dimensions inside GetSystemMetrics

How do I print my voice mail?

PropertyPage, OnInitDialog, and SetFocus

PJ Arends5-Jun-04 14:25

PJ Arends

5-Jun-04 14:25

Hey All,

I am having a small problem setting the focus to a control on a property page in my OnInitDialog() function.

BOOL CPage::OnInitDialog()
{
    CPropertyPage::OnInitDialog();
<snip>
    if (some_condition)
    {
        m_Edit.SetReadOnly();
        m_ComboBox.SetFocus();
    }
    else
        m_Edit.SetFocus();
 
    return FALSE;  // return TRUE unless you set the focus to a control
}

It does not matter if some_condition is TRUE or FALSE, the m_Edit control always has the input focus. m_Edit is the first control in the tab order. Does returning FALSE from OnInitDialog() not work for property pages, or am I missing something?

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: PropertyPage, OnInitDialog, and SetFocus

David Crow7-Jun-04 2:46

David Crow

7-Jun-04 2:46

For a CPropertyPage-derived class, you need to use the OnSetActive() method instead.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: PropertyPage, OnInitDialog, and SetFocus

PJ Arends7-Jun-04 5:17

PJ Arends

7-Jun-04 5:17

Ok, I am starting to feel like a complete idiot. I still can't get this to work.

BOOL CPage::OnSetActive()
{
    BOOL ret = CPropertyPage::OnSetActive();
    if (some_condition)
        m_Combo.SetFocus();
    return ret;
}

m_Combo.SetFocus is called successfully, but the focus remains on the edit control when the page finally shows.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: PropertyPage, OnInitDialog, and SetFocus

David Crow7-Jun-04 5:23

David Crow

7-Jun-04 5:23

How about:

#define MSG_SETFOCUS WM_APP+1
 
// need message map entry
 
BOOL CPage::OnSetActive()
{    
    BOOL ret = CPropertyPage::OnSetActive();    
    if (some_condition)        
        PostMessage(MSG_SETFOCUS);
    return ret;
}
 
LRESULT CPage::MySetFocus( WPARAM, LPARAM )
{
    m_Combo.SetFocus();    
}

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: PropertyPage, OnInitDialog, and SetFocus

PJ Arends7-Jun-04 6:37

PJ Arends

7-Jun-04 6:37

That definitely works, thanks. I will use that hack for now.

But is it really necessary to go through that that type of hack to set the focus to a control? There is obviously something that I am missing.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: PropertyPage, OnInitDialog, and SetFocus

David Crow7-Jun-04 7:05

David Crow

7-Jun-04 7:05

'Tis not a hack:

http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q148/3/88.asp&NoWebContent=1

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: PropertyPage, OnInitDialog, and SetFocus

PJ Arends7-Jun-04 7:13

PJ Arends

7-Jun-04 7:13

Just because MS does it, does not mean it's not a hack;P

Thanks for the help and the link Big Grin | :-D

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: PropertyPage, OnInitDialog, and SetFocus

David Crow7-Jun-04 7:17

David Crow

7-Jun-04 7:17

I simply provided the link so you would have something to reference. Since the tab is the first control on the property page, it only makes sense that it would receive initial focus. I don't consider using PostMessage() a hack.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Button... then Text here...

Member 6226665-Jun-04 13:17

Member 622666

5-Jun-04 13:17

Ok im going to sound like an idiot asking this... But im having trouble figuring this out.. I'm trying to get it when i click "Button A" It will some words in "Text Box A" Yea im a newb i look like a newb i feel like a newb! Just someone help me please! OMG | :OMG:

Re: Button... then Text here...

bneacetp5-Jun-04 13:26

bneacetp

5-Jun-04 13:26

DarkRaven41 wrote:
Ok im going to sound like an idiot asking this... But im having trouble figuring this out.. I'm trying to get it when i click "Button A" It will some words in "Text Box A" Yea im a newb i look like a newb i feel like a newb! Just someone help me please!

Give control IDs to your button and edit box. Then handle the BN_CLICK event for your button and add a variable of the CString type to your edit box. Then in your button's BN_CLICK event handler function type something like (assuming "m_strText" is the name of the variable you added to your edit box):

m_strText = "Yea im a newb i look like a newb i feel like a newb!";
UpdateData(FALSE); // Update the UI.

That should do it. Good luck in your programming efforts! Big Grin | :-D

Happy Programming and God Bless!

Internet::WWW::CodeProject::bneacetp

Re: Button... then Text here...

Member 6226665-Jun-04 13:42

Member 622666

5-Jun-04 13:42

Like i said i am a NEWB! i got most of what you said but its still not working... I know im doing it wrong and thats why Frown | :(

can you maybe explain it a little better? Thanks for your time!

Re: Button... then Text here...

bneacetp5-Jun-04 14:06

bneacetp

5-Jun-04 14:06

Ok. Let me try explaining from the begining step by step.

1. Create an MFC project using the Dialog application type (I assume that is what you are doing).
2. Add a Edit Box and a Button from the Toolbox to your Dialogbox.
3. Using the Property window, change the Edit Box's ID to IDC_MESSAGE and the Button's ID to IDC_MESSAGE_BTN.
4. Using the Property window, change the Button's Caption to "Show Message".
5. Right-click on the Edit Box and click "Add Variable...". Change the Category to "Value" and then the Variable Type to "CString". Name the variable "m_strMessage". Click the Finish button. You will be directed to the code view. Go back to the dialog editor.
6. Right-click on the Button control (the one you renamed earlier) and click "Add Event Handler...". Make sure the Message Type is "BN_CLICKED" and click the "Add and Edit" button.
7. Delete the comment (the line beginning with the "//") and type in its place:

m_strMessage = "Hello World! I am a beginner in Visual C++ .NET!";
UpdateData(FALSE); // Updates the controls.

8. Compile and run the program. It should work. Enjoy! Big Grin | :-D

If you are interested, you could go to Amazon.com and buy the book: Sams Teach Yourself Visual C++.NET in 21 Days (2nd Edition), ISBN- 0672321971, URL-http://www.amazon.com/exec/obidos/tg/detail/-/0672321971/qid=1086480839/sr=1-1/ref=sr_1_1/102-3025056-5268100?v=glance&s=books[^]

It will help you from a beginner level to knowing your way around the environment pretty well. Hope this helps.

Happy Programming and God Bless!

Internet::WWW::CodeProject::bneacetp

Re: Button... then Text here...

David Crow7-Jun-04 2:48

David Crow

7-Jun-04 2:48

First you'll need a CEdit control variable (e.g., m_edit). Then in the handler for the button, just make a call to m_edit.SetWindowText("some text").

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Optional Parameter

Jorgen E.5-Jun-04 12:35

Jorgen E.

5-Jun-04 12:35

Hi,

I'm a newbie C++ programmer, and I'm wondering one thing: How do I use optional parameters in my methods?

Re: Optional Parameter

kfaday5-Jun-04 13:16

kfaday

5-Jun-04 13:16

well, if you mean this:

void function1 (a=0)
{
cout >> a;
}

if you call the function this way:
function1;
the result is that 0 will be printed

if you call the function this way:
function1(9);
the result is that 9 will be printed

Re: Optional Parameter

Michael Dunn5-Jun-04 13:21

Michael Dunn

5-Jun-04 13:21

Correction - you always need the parens when calling the function. This line:

function1;

does nothing. It takes the address of function1 and does nothing with it. To actually call it you write:

function1();

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
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----
I even hear the Windows "OMG I booted up fine" sound.
-- Paul Watson diagnosing hardware problems.

Re: Optional Parameter

Jorgen E.5-Jun-04 13:30

Jorgen E.

5-Jun-04 13:30

Yeah, I knew it wasn't to hard Smile | :)

Just had some trouble finding it. Thanks!

/OPT:REF

Archer2825-Jun-04 11:07

Archer282

5-Jun-04 11:07

when i statically link the MFC libarary

i get this warning when i go to build the release
LINK : warning LNK4089: all references to "SHELL32.dll" discarded by /OPT:REF

what can i do about this?

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