C / C++ / MFC

8-Sep-15 3:03

I have a dialog of radio buttons, 100 of them
I use this to select type of material product is made from so I can select correct ink for printing. Selections are everything from alumininum, plastics to wood.

I would like to select 1 radio button and have it return
the int of that selection without having to add an event handler for each and everyone of the radio buttons

Is there a routine that can handle any check on any button?

If(any button is checked) return(int # of the button)

Using visual studio c++ 2008

Peter Boyko

modified 8-Sep-15 10:23am.

Eddy Vluggen8-Sep-15 3:38

Eddy Vluggen

8-Sep-15 3:38

You can hook up the same event for each button. The sender can be identified by the sender parameter of the event. It contains a reference to the button, and thus, its name.

--sorry, thought this was the C# forum. Doesn't MFC have something similar?

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

golfbird8-Sep-15 7:47

8-Sep-15 7:47

if it does, I'm not able to find it. Could be I'm looking at the wrong pages.

Peter Boyko

Richard MacCutchan8-Sep-15 4:46

8-Sep-15 4:46

golfbird wrote:
I have a dialog of radio buttons, 100 of them

That is a really bad idea. Use a ListBox, or preferably more than 1 to allow simple selection of items.

golfbird8-Sep-15 10:15

8-Sep-15 10:15

thanks
you have busted my bubble.
To me, it seemed easier to look at a dialog page
with radio buttons rather than search a listing
especially for my printers who may not have to learn how
to use drop down list boxes

Seems to me that the program knows when a radio button
is selected and then marks is as such and turns off all others in the group..

I was hoping I could intercept the routine and just
add my own function to it.

Peter Boyko

jeron18-Sep-15 10:47

jeron1

8-Sep-15 10:47

golfbird wrote:
I was hoping I could intercept the routine and justadd my own function to
it.

You can, see Davids reply. You'll need an ON_BN_CLICKED() entry for every radio button, but the function that gets called can be the same. Though for a 100 buttons I imagine it gets unwieldy.

BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
    //{{AFX_MSG_MAP(CMyDialog)
    ON_BN_CLICKED(IDC_RADIO_1, OnRadioClick)
    ON_BN_CLICKED(IDC_RADIO_2, OnRadioClick)
    ON_BN_CLICKED(IDC_RADIO_3, OnRadioClick)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

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golfbird8-Sep-15 13:46

8-Sep-15 13:46

This looks like what I was looking for.
Appreciate it, will give it a test
thank you

Peter Boyko

Peter Leow8-Sep-15 4:56

Peter Leow

8-Sep-15 4:56

Richard is right. Having 100 radio buttons, it is unusable. Can you categorize them and may be make use of dropdown boxes.
Check this out Radio Buttons in MFC (Visual Studio 2008 / C++)[^]

David Crow8-Sep-15 9:13

David Crow

8-Sep-15 9:13

golfbird wrote:
I have a dialog of radio buttons, 100 of them

Very unfriendly UI.

The second parameter to the ON_BN_CLICKED() macro can point to the same handler function.

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golfbird8-Sep-15 9:33

Create CBitmap from another CBitmap

8-Sep-15 9:33

Thanks.. I have to believe the objective I'm trying to reach
is beyond me. Thank You all again.

Peter Boyko

_Flaviu3-Sep-15 1:49

Re: Create CBitmap from another CBitmap

3-Sep-15 1:49

Which are the way to copy a CBitmap to another CBitmap, but have both of them ? In fact, I want to create a CBitmap from another CBitmap ... could you help me ? Thank you.

Jochen Arndt3-Sep-15 2:23

Jochen Arndt

3-Sep-15 2:23

You must do it by creating the new bitmap using the size of the source, select both bitmaps into DCs and call BitBlt to copy the image bits. Examples can be found on the web (found this searching for "cbitmap copy": http://www.tech-archive.net/Archive/VC/microsoft.public.vc.mfc/2007-07/msg01320.html[^])

Re: Create CBitmap from another CBitmap

_Flaviu3-Sep-15 22:29

Writing a Generic Function

3-Sep-15 22:29

Thank you, I have succeeded ! Smile | :)

Donguy19762-Sep-15 12:17

Donguy1976

2-Sep-15 12:17

XML

I have 3 functions that do sorting on a CArray.

CArrays are declared in header file:

CArray<int*, int*>m_Integer;
CArray<string*, string*>m_String;
CArray<double*, double*>m_Double;

void sortIntegers()
{

// Do sorting for m_Integer here
}

void sortStrings()
{
// DO sorting for m_String
}

void sortDouble()
{
// Do sorting for m_Double
}

Now what i want to do is, have one generic function and then pass the CArray to that.

So far what i did is,

in Header file:

void sortAll(CArray<void*, void*> m_Array);

in CPP file:

void sortAll(CArray<void*, void*> m_Array)
{
    int size = m_Array.GetSize();

    ............
    ............
    ............

    m_Array.GetAt(0); // Error here
    ................
    ................
}

The error is that, it needs a class type and not a void type.

I am not sure how to proceed with writing a generic function to handle all different data types in one.

Any help is welcome!

Re: Writing a Generic Function

Richard MacCutchan2-Sep-15 21:06

problems with std::bind in VS2015

2-Sep-15 21:06

You need to use Template classes; see https://www.google.com/search?q=template+class+c%2B%2B[^].

Member 85340352-Sep-15 5:11

Member 8534035

2-Sep-15 5:11

Hi all,

I have a weird problem with stl !

I need to work with callback functions between different classes. With VS2010 I have done this already different times without any problem.

With VS2015 I cannot compile such code!

Example:

in Header in Class Declaration:
    #include <functional>
...
	bool ProvideItemData(int nItem, int nSubItem);

in .cpp:

	{
		//using namespace std::placeholders; // for `_1`
		m_ListCtrl.SetOwnerData(std::bind(&CBlockEditView::ProvideItemData, this, std::placeholders::_1));
	}

declaration in called class:

bool SetOwnerData(std::function <bool(int nItem,int nSubItem)> callback);

When compiling in VS2010, I get weird error messages:

c:\program files (x86)\microsoft visual studio 14.0\vc\include\type_traits(1501): error C2440: 'return': cannot convert from 'std::_Unforced' to 'bool'
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\type_traits(1501): note: No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\functional(210): note: see reference to function template instantiation '_Rx std::_Invoke_ret<_Rx,_Callable&,_Ty,_Ty>(std::_Forced<_Rx,false>,_Callable &,_Ty &&,_Ty &&)' being compiled
1>          with
1>          [
1>              _Rx=bool,
1>              _Callable=_Decayed,
1>              _Ty=int
1>          ]
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\functional(208): note: while compiling class template member function 'bool std::_Func_impl<_Decayed,_Alloc,_Ret,int,int>::_Do_call(int &&,int &&)'
1>          with
1>          [
1>              _Alloc=std::allocator<int>,
1>              _Ret=bool
1>          ]
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\functional(136): note: see reference to class template instantiation 'std::_Func_impl<_Decayed,_Alloc,_Ret,int,int>' being compiled
1>          with
1>          [
1>              _Alloc=std::allocator<int>,
1>              _Ret=bool
1>          ]
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\functional(339): note: see reference to class template instantiation 'std::_Is_large<_Myimpl>' being compiled
1>  c:\program files (x86)\microsoft visual studio 14.0\vc\include\functional(318): note: see reference to function template instantiation 'void std::_Func_class<_Ret,int,int>::_Reset_alloc<_Ty,std::allocator<int>>(_Fx &&,const _Alloc &)' being compiled
1>          with

I do not find any solution. So at the moment I do not have any idea, how to solve this issue!
Please help!

CFileDialog strange GetFileName

_Flaviu1-Sep-15 23:18

Re: CFileDialog strange GetFileName

1-Sep-15 23:18

I have following code:

C++

CFileDialog fileDlg(TRUE, _T("*"), NULL, OFN_PATHMUSTEXIST | OFN_OVERWRITEPROMPT, _T("All files (*.*)|*.*||"), NULL);
if(IDOK == fileDlg.DoModal())
    TRACE(">>>%s\n", fileDlg.GetFileName());

and when I select a file, no mater what kind of file, I get:

C++

>>>D

that is all ... why ? What I have done wrong here ?

Jochen Arndt2-Sep-15 0:10

Jochen Arndt

2-Sep-15 0:10

You are passing an ANSI string to the TRACE macro. Therefore, an ANSI string is expected for the %s parameter but you have a Unicode build and fileDlg.GetFileName() returns a wide string.

So you should use the _T() macro also for the TRACE argument:

TRACE(_T(">>>%s\n"), fileDlg.GetFileName());

See also the examples at MFC Debugging Techniques[^].

Re: CFileDialog strange GetFileName

_Flaviu2-Sep-15 0:58

Set focus automatically to the last focus item after clossinga modal dialog

2-Sep-15 0:58

Thank you. That was the problem.

aks.1-Sep-15 22:02

aks.

1-Sep-15 22:02

1. I set tab order for control in a MFC dialog.
2. Started the application.
3. Clicked a button in dialog, whose tab order is 3.
4. A modal dialog displayed.
5. Closed the modal dialog.
Now the focus automatically moved to the control having tab order 0.

Since the focus was on the button just before the click, I would like to retain the selection on the same button.

aks

Re: Set focus automatically to the last focus item after clossinga modal dialog

Richard MacCutchan2-Sep-15 2:55

Re: Set focus automatically to the last focus item after clossinga modal dialog

2-Sep-15 2:55

aks. wrote:
3. Clicked a button in dialog, whose tab order is 3.

But did this button actually have the focus at this point?

aks.3-Sep-15 2:36

aks.

3-Sep-15 2:36

Yes.
Before button click, even if the last focus is on another control( say tab order 2 ), after closing the Modal dialog the focus move to control having Tab order 0.

aks

Re: Set focus automatically to the last focus item after clossinga modal dialog

Richard MacCutchan3-Sep-15 3:42