C / C++ / MFC Discussion Boards

clintsinger9-Oct-02 6:49

9-Oct-02 6:49

I have an MFC child dialog that I use on an windows CE machine. I would like to place that dialog into another MFC dialog which is skinned when the app is compiled for a non-ce device, ie. the desktop computer. All I need to know is - what is the way one would embed a dialog in another dialog. I have seen how to embed a child dialog into a form view and was also wondering how this compares to doing dialog within dialog. What would be easiest taking in account that I have a skin on the parent dialog.

Cheers,
Clint

Re: Child dialog in a child dialog?

Joaquín M López Muñoz9-Oct-02 8:12

Joaquín M López Muñoz

9-Oct-02 8:12

Embedding a dialog into a CFormView or another CDialog is basically the same: have the child dialog have no border, and on the OnInitDialog of the parent dialog create the child with suitable parent and position it. There are additional details to fill in, but the basics are simple.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Child dialog in a child dialog?

clintsinger9-Oct-02 8:35

clintsinger

9-Oct-02 8:35

Thanks for your help. A little trial and error finally got me what I was looking for Smile | :)

Registry

sikrip9-Oct-02 6:47

sikrip

9-Oct-02 6:47

Hi,
I want my program to search if a program is installed or not , from the registry(???).How can i do that(i use MFC)??

Re: Registry

valikac9-Oct-02 8:28

valikac

9-Oct-02 8:28

One solution is to check the registry key in the uninstall section. If the registry key is not found, the MFC function should return NULL. Better yet, use a Win32 API registry function including RegOpenKey().

LONG RegOpenKey(HKEY hKey, LPCTSTR lpSubKey, PHKEY phkResult);

Kuphryn

Re: Registry

sikrip10-Oct-02 23:26

sikrip

10-Oct-02 23:26

Could you tell me how can i check the registry key in the uninstall section?If you have an example send it to me.
Sory And Thanks!

CTreeCtrl and NM_TREEVIEW

Nitron9-Oct-02 6:38

Nitron

9-Oct-02 6:38

Maybe I'm just not good at finding things on MSDN, and my help doesn't list anything in the index about NM_TREEVIEW Confused | :confused:

Anyway, how do I get information from a CTreeCtrl when I handle the CLickTree?

I have:

void CMyDlg::OnClickTree(NMHDR* pNMHDR, LRESULT* pResult)
{

    // I want to know which Item was clicked so that
   int iRoot = iTheRootOfItemClicked;
   int iSub  = iSubIndexOfItem;
   int iItem = iTheIndexOfTheItem;
}

How do I get that info or am I supposed to do this some other way???

There's honorable mentions of TV_ITEM things and
HTREEITEM, but all I get is:

HTREEITEM Handle to an item in a tree-view control.

Somehow that doesn't help me much. Dead | X|

Nitron
_________________________________________--
message sent on 100% recycled electrons.

Re: CTreeCtrl and NM_TREEVIEW

Chris Hambleton9-Oct-02 6:48

Chris Hambleton

9-Oct-02 6:48

Try searching on NMTREEVIEW -- this is what I found:

typedef struct tagNMTREEVIEW {
NMHDR hdr;
UINT action;
TVITEM itemOld;
TVITEM itemNew;
POINT ptDrag;
} NMTREEVIEW, FAR *LPNMTREEVIEW;

That's the structure -- you should be able to cast the pNMHDR to a NMTREEVIEW pointer, and then get the struct member of NMTREEVIEW that you want...

Once you get the tvitem you want, use the tvitem.hItem (which is an HTREEITEM) and then use the CTreeCtrl member functions to get the properties of the item you need...

"If at any time I announce that a nation or kingdom is to be uprooted, torn down and destroyed, and if that nation I warned repents of its evil, then I will relent and not inflict on it the disaster I had planned. And if at another time I announce that a nation or kingdom is to be built up and planted, and if it does evil in my sight and does not obey me, then I will reconsider the good I had intended to do for it." -- Jeremiah 18:7-10 (God, commenting on the value of the United Nations)

Re: CTreeCtrl and NM_TREEVIEW

Nitron9-Oct-02 8:15

Nitron

9-Oct-02 8:15

Chris Hambleton wrote:
Once you get the tvitem you want, use the tvitem.hItem (which is an HTREEITEM) and then use the CTreeCtrl member functions to get the properties of the item you need...

um, I think this is what I don't know how to do Unsure | :~

Say I have a tree:

- Root1
|
|-- SubRoot1
| |
| |- Item1
| |- Item2 <-- And I click on this one...
| |- Item3
|
|-- SubRoot2
  |
  |- Item1
  |- Item2

How would I be able to say:

You Clicked 1.1.2

Nitron
_________________________________________--
message sent on 100% recycled electrons.

Re: CTreeCtrl and NM_TREEVIEW

Shog⁹9-Oct-02 18:34

Shog⁹

9-Oct-02 18:34

NMTREEVIEW* pNMTV = (NMTREEVIEW*)pNMHDR;
HTREEITEM hItemNew = pNMTV->itemNew.hItem;
HTREEITEM hItemsParent = m_wndTree.GetParentItem(hItemNew);
HTREEITEM hItemsParentsParent = m_wndTree.GetParentItem(hItemsParent);

Shog⁹
~~------~~

And on the pedestal, these words appear:
"My name is Ozymandias, King of Kings,
Look on my Works, ye Mighty, and despair!"
Nothing beside remains.

STL and intrinsic sorting

ns9-Oct-02 6:24

9-Oct-02 6:24

Of these STL containers, which ones will naturally sort their contents as you push them on?

Vector, List, Set, Map

Thanks

Appreciate your help,
ns

Re: STL and intrinsic sorting

C^hris L^osinger9-Oct-02 6:28

C^hris L^osinger

9-Oct-02 6:28

set

-c

Support regime change. Vote.

Etch-a-sketch!

Re: STL and intrinsic sorting

Joaquín M López Muñoz9-Oct-02 8:04

Joaquín M López Muñoz

9-Oct-02 8:04

set and map (the ordering in the latter is done by the key).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: STL and intrinsic sorting

ns9-Oct-02 8:45

9-Oct-02 8:45

Thanks for letting me know its sorted on the key.I was wondering.... Smile | :)

Appreciate your help,
ns

Pointers to virtual methods

Patje9-Oct-02 6:23

Patje

9-Oct-02 6:23

Hi gurus,

Suppose you have some classes like these:

class BaseClass<br />
   {<br />
   public: virtual long getValue() {return 0;}<br />
   };<br />
<br />
class SubClass1 : public BaseClass<br />
   {<br />
   public: virtual long getValue() {return 1;}<br />
   };<br />
<br />
class SubClass2 : public BaseClass<br />
   {<br />
   };<br />
<br />
void SomeFun (BaseClass *someInstance)<br />
{<br />
// Find out if getValue has been overruled or not<br />
// i.e. which function is called by someInstance->getValue<br />
}<br />
<br />
int main (int argc, char **argv)<br />
{<br />
BaseClass baseInstance;<br />
SubClass1 subInstance1;<br />
SubClass2 subInstance2;<br />
<br />
SomeFun (&baseInstance);<br />
SomeFun (&subInstance1);<br />
SomeFun (&subInstance2);<br />
}

In other words, in SomeFun I want to find out which implementation of getValue is used by the given instance. I don't want to actually call someInstance->getValue, but I just want to find out which method would be called if I would call it.

I tried to find the address of the method by using
&someInstance->getValue
and
someInstance->getValue
but the first one doesn't compile, and the second one gives a warning and doesn't work.

Notice I don't want to use something like
pMethod = BaseClass::getValue;
or
pMethod = SubClass1::getValue;
since I don't know who has inherited from my BaseClass, nor which instance is given as argument to me. I just want to know: the class of which an instance is given to me, has it overruled the virtual method getValue or not?

Of course a solution could be to add another virtual method, something like:
bool iHaveOverruledGetValue();
which should be implemented by each subclass (if they have overruled the getValue method, but that doesn't seem like a good solution either.

Anyone suggestions ?

Enjoy life, this is not a rehearsal !!!

Re: Pointers to virtual methods

C^hris L^osinger9-Oct-02 6:22

C^hris L^osinger

9-Oct-02 6:22

Patje wrote:
Of course a solution could be to add another virtual method

IMHO, that seems like the best approach, both from an OO standpoint and a maintainability one. otherwise, with the pointer idea, you're writing code that is at best confusing and at worst non-portable.

-c

Support regime change. Vote.

Etch-a-sketch!

Re: Pointers to virtual methods

Todd Smith9-Oct-02 19:10

Todd Smith

9-Oct-02 19:10

You can create a switch statement and try dynamic_cast but that requries RTTI to be enabled.

I would just add a virtual method.

Todd Smith

OnDropdown NOT!

jimNLX9-Oct-02 6:08

jimNLX

9-Oct-02 6:08

is there a way to stop this from open when a certain condition is met?

I'm trying to do this in the OnDropdown section of code and anything I do dosen't stop the dropdown from opening.

Thanks for your help,

Jim

Re: OnDropdown NOT!

Maximilien9-Oct-02 6:15

Maximilien

9-Oct-02 6:15

I assume it's for a combox box, why can't you just disable the control ?
the OnDropDown is the callback.
Max.

Re: OnDropdown NOT!

jimNLX9-Oct-02 6:26

jimNLX

9-Oct-02 6:26

Here is what the code looks like. I couldn't find anything that would just quite without displaying that drop down.

void CAMID::OnDropdownMSel()
{
CComboBox *pMSelBox = (CComboBox *) GetDlgItem(IDC_MISSION_SEL);

if(HostStruct.bFreeze == false)
{//warn user...and quit dropdown
MessageBox("blah blah blah", "Warning!", MB_OK);

}
else
{
//drop down box
}

putting in leading spaces

ns9-Oct-02 5:59

9-Oct-02 5:59

I have strings (numeric) of various lengths:

"123"
"2345"
"5"
"99999"
etc. I need to make them all as long as the longest one "99999", so they should look like "00123", "00005", etc.

If these strings are stored in an array A[], then how can I do this padding? I will be knowing the biggest strings length.
I need to automate this process.

for ( int i = 0; i

Re: putting in leading spaces

jmkhael9-Oct-02 6:05

jmkhael

9-Oct-02 6:05

use CStrings if u can

CString urString;

in the loop:

urString = a [i];
CString t( '0', numberOfSpaceNeeded ); 
t += urString;

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: putting in leading spaces

ns9-Oct-02 6:11

9-Oct-02 6:11

Amazing! Thanks! I didnt know CString had such a handy constructor..... Smile | :)

Appreciate your help,
ns

Re: putting in leading spaces

Maximilien9-Oct-02 6:25

Maximilien

9-Oct-02 6:25

You could format the number with the approprite lenghth

CString aString;
aString.Format( "%7i", 123 ); // where the string will have a lenght of 7 chars.

Re: putting in leading spaces

Joe Woodbury9-Oct-02 7:00

Joe Woodbury

9-Oct-02 7:00

Maximilien wrote:

CString aString;<br /> aString.Format( "%7i", 123 ); // where the string will have a lenght of 7 chars.

You forgot the zero:

aString.Format("%07i", 123);

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