C / C++ / MFC

1-Jun-06 17:59

How can i resize the dialog box controls when i resize the dialog box?? Confused | :confused:

Nibu babu thomas1-Jun-06 18:21

1-Jun-06 18:21

sruti_p wrote:
How can i resize the dialog box controls when i resize the dialog box??

Well you've got to design a layout manager. Just like the ones you find in Java. Wink | ;)

The best place to trigger a layout is WM_SIZE.

Nibu thomas
A Developer

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Member 30398431-Jun-06 19:28

1-Jun-06 19:28

But how can i do this? is there any function for this??
Thanks for reply.

Nibu babu thomas1-Jun-06 19:35

1-Jun-06 19:35

sruti_p wrote:
But how can i do this? is there any function for this??

It should be easy to find one. Hey CP has one for sure I think I saw one. Unsure | :~

Of course WhiteSky has mentioned two. But they work on a single control. But the above mentioned technique can take a bunch of controls and resize them as your specify.

I think I saw one or two or three... of those layout managers in Code Project. Please check.

Nibu thomas
A Developer

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Member 30398431-Jun-06 19:48

1-Jun-06 19:48

Thanks for ur reply. Smile | :)

Benoy Bose1-Jun-06 18:49

1-Jun-06 18:49

There is no need to design a layout manager. You just have to resize the dialog box controls as follows.

1. Get the Client rectangle of the Dialog Box. ( Use: GetClientRect(LPRECT))
2. Calculate the new size of controls.
4. Validate whether the dialog controls are valid window ( Use; IsWindow( HWND ))
5. Move dialog controls to the new position i they are valid windows.

Hope it is useful
Thank You

Regards,
Benoy Bose

Nibu babu thomas1-Jun-06 19:02

1-Jun-06 19:02

Benoy Bose wrote:
There is no need to design a layout manager.

Benoy Bose wrote:
1. Get the Client rectangle of the Dialog Box. ( Use: GetClientRect(LPRECT))
2. Calculate the new size of controls.
4. Validate whether the dialog controls are valid window ( Use; IsWindow( HWND ))
5. Move dialog controls to the new position i they are valid windows.

Which is what the layout manager will do for you. Hmmm | :|

Nibu thomas
A Developer

Programming tips[^] My site[^]

Benoy Bose1-Jun-06 19:09

1-Jun-06 19:09

Layout manager in Java ( Like you said ) will automatically resize the controls in the window.
Since we have a very simple method to resize the controls in MFC, designing a layout manager is overhead to the developer.
In Java it's depends upon the personel interest since there are both the features are readly available.

Nibu babu thomas1-Jun-06 19:15

1-Jun-06 19:15

Benoy Bose wrote:
Layout manager in Java ( Like you said ) will automatically resize the controls in the window.

Not always. It depends on the way you design it.

Benoy Bose wrote:
Since we have a very simple method to resize the controls in MFC, designing a layout manager is overhead to the developer.

Now imagine she want's to change the layout! Imagine the overhead.

Benoy Bose wrote:
In Java it's depends upon the personel interest since there are both the features are readly available.

That is why you must have a layout manager. When you design, generalize your design. That is what OOP is all about.

If you don't want any layout don't call the layout manager. I love the Java layout manager classes. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

Benoy Bose1-Jun-06 19:23

1-Jun-06 19:23

its really depends upon the persnel interest. I respect you interest. I believe Layout can generalize the functionality, but my code do the same in simple and a few lines.

While I was working with layout managers in Java, i feel i have only a less freedom to move the control over the window. And I satrted to put NULL in the Java Window layout and moved my controls independently.

Nibu babu thomas1-Jun-06 19:32

1-Jun-06 19:32

Benoy Bose wrote:
my code do the same in simple and a few lines.

Then that is called a simple layout manager. Don't get overrawed by the term Layout Manager. Smile | :)

Benoy Bose wrote:
i feel i have only a less freedom to move the control over the window.

I worked in Java for sometime. The LayoutManagers were cool. Some of them were not that good but then they all had some purpose as indicated by their name.

I worked in some MFC layout managers. All of them were real cool. Except for setting them up. Once that pain is over it looks real cool.

But as you said it depends. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

Member 30398431-Jun-06 19:47

1-Jun-06 19:47

I Even want to increase/decrease the size of the controls based on th ewindow size. How can i do this??
Cry | :((

Benoy Bose1-Jun-06 19:51

1-Jun-06 19:51

You can either use Layout Managers or simple use MoveWindow or SetWindowPos in OnSize( WM_SIZE )

Nibu babu thomas1-Jun-06 19:52

1-Jun-06 19:52

sruti_p wrote:
I Even want to increase/decrease the size of the controls based on th ewindow size. How can i do this??

Layout Managers Found In CP[^]. You should try to search first. Hmmm | :|

Nibu thomas
A Developer

Programming tips[^] My site[^]

Member 30398431-Jun-06 20:26

1-Jun-06 20:26

Thanks a lot.
I got it. Smile | :)

Hamid_RT1-Jun-06 19:25

Hamid_RT

1-Jun-06 19:25

you can use WM_SIZE and use functions MoveWindow or SetWindowPos in this event

whitesky

Member 30398431-Jun-06 20:06

1-Jun-06 20:06

I am not getting it.
This is what my code is:
void CEgAppDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);

// TODO: Add your message handler code here
CRect wRect,eRect;
GetClientRect(wRect);
m_edit.GetClientRect(eRect);
POINT * pt;
pt->x=eRect.left;
pt->y=eRect.top;
::ClientToScreen(m_edit.m_hWnd,pt);
eRect.bottom+=30;
eRect.right+=30;
::MoveWindow(m_edit.m_hWnd,pt->x,pt->y,eRect.Width(),
eRect.Height(),TRUE);
}

I am getting an Exception Cry | :((

Hamid_RT1-Jun-06 20:32

Hamid_RT

1-Jun-06 20:32

i guess m_edit.m_hWnd=NULL
insert this
if(m_edit.m_hWnd!=NULL)
{
...
}

whitesky

Benoy Bose1-Jun-06 20:46

1-Jun-06 20:46

Hey, just reduce the code lines do as follows

void CEgAppDlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);

CRect ClientRect( 0, 0, 0, 0 );
GetClientRect( ClientRect );
if( FALSE != IsWindow( m_edit.GetSafeHwnd()))
{
m_edit.MoveWindow( ClientRect );
}
}

This code is expected to work only when the Dialog is forcely resize by using Minimize, Maximize, Drag Size etc. To resize the control in Initial state you have to put some similiar code in the OnInitDialog of the dialog class like

CRect ClientRect( 0, 0, 0, 0 );
GetClientRect( ClientRect );
m_edit.MoveWindow( ClientRect );

In OnInitDialog you do not have to check the Window handle because OnInitDialog is called after the creation of the Dialog Box and it's control. But you should check the Validity of m_edit window in OnSize because it is called by the framework when the DialogBox alone is created, before the edit is created.

OK ?

Regards,
Benoy Bose

auto finding the dir the exe is in

ThatsAlok1-Jun-06 20:31

ThatsAlok

1-Jun-06 20:31

sruti_p wrote:
How can i resize the dialog box controls when i resize the dialog box?

Either Subclass the control to handle the Dialog resize or use MoveWindow api!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
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locoone1-Jun-06 17:39

locoone

1-Jun-06 17:39

what is the best way to open a program and check for a file if its not there make it? its a ini file. Confused | :confused:

Nibu babu thomas1-Jun-06 17:47

1-Jun-06 17:47

locoone wrote:
what is the best way to open a program and check for a file if its not there make it? its a ini file.

_tgetcwd, GetModuleFileName.

Hope I understood your question. Unsure | :~

Nibu thomas
A Developer

Programming tips[^] My site[^]

Sarath C1-Jun-06 18:15

Sarath C

1-Jun-06 18:15

from ur question what i understood that, u have an exe it will check for a file and if not existing, u need to create one right?

here is a sample snippet

CFileFind finder;<br />
   BOOL bWorking = finder.FindFile("test.ini");<br />
   <br />
   if(FALSE == bWorking) // file exsting<br />
   {<br />
	   // create new file<br />
   }<br />
   // continue further operations<br />

Sa^Rath.

"Don't Do Different things... Do Things Differently..."

Hamid_RT1-Jun-06 19:31

Hamid_RT

1-Jun-06 19:31

you can use

<br />
WIN32_FIND_DATA m_data;<br />
HANDLE hFile;<br />
hFile=FindFirstFile(filename,&m_data)<br />
if(hFile==INVALID_HANDLE_VALUE) //file not found<br />
else<br />
FindClose(hFile);<br />

whitesky