CToolBar question... - C / C++ / MFC Discussion Boards

Re: Broadcasting the command

22-Feb-02 7:00

Think about overriding OnCmdMsg( )and route the messages yourself.

Re: Broadcasting the command

yellowine22-Feb-02 10:36

yellowine

22-Feb-02 10:36

I will take this approach and give it a try.

Thanks.

Deallocating Tree Control Data

Aaron Schaefer22-Feb-02 6:17

Aaron Schaefer

22-Feb-02 6:17

Hi There,

I have a question about tree controls. If I set a tree item's data to something like a pointer to a class or something, when is the appropriate time to delete the pointer?

This is inside a dialog bar which houses the tree control.

Thanks,

Aaron

Re: Deallocating Tree Control Data

Tim Smith22-Feb-02 6:19

Tim Smith

22-Feb-02 6:19

When you receive a TVN_DELETEITEM notification for an element in the tree control. That is by far the best way.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: Deallocating Tree Control Data

Aaron Schaefer22-Feb-02 6:20

Aaron Schaefer

22-Feb-02 6:20

OK, thanks. I suppose this is sent out both when a single item is deleted from an active tree control and during the destruction of the entire control?

Re: Deallocating Tree Control Data

Tim Smith22-Feb-02 6:29

Tim Smith

22-Feb-02 6:29

When you delete the control, TVN_DELETEITEM will be sent for each item in the control. It sounds excessive, but it works just fine.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: Deallocating Tree Control Data

Aaron Schaefer22-Feb-02 6:30

Aaron Schaefer

22-Feb-02 6:30

Thanks!

CToolBar question...

Jamie Hale22-Feb-02 5:19

Jamie Hale

22-Feb-02 5:19

I want to be able to display a toolbar to the users with custom buttons (defined in a settings file - NOT resources) and a custom bitmap (also defined external to the application).

Is this possible to with a CToolBar? I know I can use SetButtons to customize the buttons, but it looks like the only way to set a bitmap into a CToolBar is through LoadBitmap. And I don't think I can use LoadBitmap with a non-resource based bitmap.

Any ideas? I'm trying to do it without writing a custom control... if there's no way, I'll just make 'em static. Just trying to be a bit fancy. Smile | :)

Re: CToolBar question...

Jamie Hale22-Feb-02 5:20

Jamie Hale

22-Feb-02 5:20

Oi. I'm stupid. Just found CToolBar::SetBitmap().

Jig | [Dance]

Re: CToolBar question...

Jon Hulatt22-Feb-02 6:05

Jon Hulatt

22-Feb-02 6:05

There are many, many ways of getting a CBitmap or BITMAP from a file. See the relevant areas on codeproject.

good luck Smile | :)

Sorry to dissapoint you all with my lack of a witty or poignant signature.

CListBox colors

Stevieslu22-Feb-02 5:17

Stevieslu

22-Feb-02 5:17

Quick Question! How do I go about changing the colors of the text and background in a standard list box?

Re: CListBox colors

Paul M Watt22-Feb-02 5:23

Paul M Watt

22-Feb-02 5:23

In the parent window of your listbox handle this message:

WM_CTLCOLORLISTBOX

This will allow you to select a brush for the background and set teh color of the text.

Re: CListBox colors

Mazdak22-Feb-02 5:21

Mazdak

22-Feb-02 5:21

Check this

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

PROP_ENTRY ( ATL) ( agaaaain :-) )

Braulio Dez22-Feb-02 4:30

Braulio Dez

22-Feb-02 4:30

Hi,

I have an "IPicture *" object in my ActiveX control, and I would like to serialize it ( so when the object is save in the container It can be loaded later).

The problem that property maps work pretty well for simple things like integers, or boolean, but I have no idea how to save my IPicture object.

Can you help me please ?, Thanks in advance, Bye !
Braulio

Re: PROP_ENTRY ( ATL) ( agaaaain :-) )

Joao Vaz22-Feb-02 5:14

Joao Vaz

22-Feb-02 5:14

Try with this

PROP_ENTRY("Picture", DISPID_PICTURE, CLSID_StockPicturePage)

or with CLSID_MSStockPicture.
I think if i'm not mistaken that this stock implementation supports jpg, gif , bmp, wmf and ico files.

I think also you must include the MSStkPPg.H .
Ah and you must distribute the MSStkPPg.dll.

Hope this helps Braulio,

Joao Vaz

Re: PROP_ENTRY ( ATL) ( agaaaain :-) )

Braulio Dez22-Feb-02 5:30

Braulio Dez

22-Feb-02 5:30

Hi Joao !

Thanks, for the tip, but for the DISPID_PICTURE, I need to set a property with a dispatch pointer isn´t it ?, mmm... the problem that I have is that the pointer that contains the metafile can be NULL Frown | :-(

, sorry but I don´t understand too much the prop_entry for saving com objects.

I have tried a dirty way:

In my .H file I have:
CComQIPtr<ipicture> _Pict; // Better to use smart pointers, just forget about AddRef, Release, QInterface...

TO LOAD

HRESULT IPersistStreamInit_Load(LPSTREAM pStm, ATL_PROPMAP_ENTRY* pMap)
{
   // ------------- TRYING TO LOAD THE IPICTURE
   CComPtr<IPictureDisp> pic;
   LARGE_INTEGER l;
   l.QuadPart  =0;
   pStm->Seek(l, STREAM_SEEK_SET, NULL);


   OleLoadPicture(pStm, l.LowPart, FALSE, IID_IPictureDisp, (void **) &pic);
   if(pic) {
      _Pict = pic;
   }
   // -------------


   HRESULT hr = MyAtlIPersistStreamInit_Load(pStm, pMap, this,
                   (IUnknown*)(IDispatch*)this);
   if (SUCCEEDED(hr))
      m_bRequiresSave = FALSE;
   return hr;
}

TO SAVE:

HRESULT IPersistStreamInit_Save(LPSTREAM pStm, BOOL fClearDirty,
        ATL_PROPMAP_ENTRY* pMap)
{
   // ------------- TRYING TO SAVE THE IPICTURE
   if(_Pict) {
      CComQIPtr<IPersistStream> p = _Pict;

      p->Save(pStm, FALSE);
   }
   // -------------


   return MyAtlIPersistStreamInit_Save(pStm, fClearDirty, pMap, this,
                   (IUnknown*)(IDispatch*)this);
}

It seems to work, but I´m not sure if it´s a time bomb Smile | :)

, what do you think about it ?, Thanks a lot Joao, Bye !
Braulio

Re: PROP_ENTRY ( ATL) ( agaaaain :-) )

Joao Vaz22-Feb-02 5:56

Joao Vaz

22-Feb-02 5:56

Hum, it seems a working clever hack Big Grin | :-D

To tell the truth, it's almost one year that i don't touch ATL, i'm currently
currently working with TCL(kinda of perl) , javascript and html Dead | X|

, what a programmer makes for a living ..., oh well only more 2,3 months and counting...
Despicte all the braindamage that COM and ATL provocated on me, i miss it OMG | :OMG:

, well..., what a heck, i will start definity to work again on COM and c++ just to amuse myself, these fuc**** months, i want my C++ mummy Cry | :((

Good luck on your project Braulio, and asta la vista ...

Joao Vaz

Re: PROP_ENTRY ( ATL) ( agaaaain :-) )

Braulio Dez22-Feb-02 6:05

Braulio Dez

22-Feb-02 6:05

Thanks !

He he, it's truth, C++ and ATL it´s like a drug... sometimes you hate it but you need it Big Grin | :-D

... But anyway sometime is good to have some stop with ATL programming if not you can turn crazy Wink | ;-)

It´s a pity that Microsoft it´s going to throw ATL to the garbage Frown | :-(

, they have released a new version and then... not more like with MFC, ... but the people says that .net i´ts easy and powerfull ( we will be working with VBasic in some years Frown | :-(

).

See ya !
Braulio

Re: PROP_ENTRY ( ATL) ( agaaaain :-) )

Joao Vaz22-Feb-02 6:25

Joao Vaz

22-Feb-02 6:25

Hey Braulio, on VC .NET you still have ATL 7.0 and ATL Server(programming ISAPI applications, web services, ...), so your knowlege do not go the trash can, and by the way, i saw in a microsoft newsgroup thread, that will be mc++
(managed c++) form designer in VC8++ , from a member on the VC++ compiler team, like thre is a vb.net and c# form designer,they simple didn't have time, so nothing is lost, and don't forget Stan Lippman , one of the c++ Arquictects now works for Microsoft , and it keeps saying that c++ will play a major role on .NET plataform, so i don't believe that this guy could lie to us , c++ programmers Big Grin | :-D

Cheers,

Joao Vaz

Which is The Best Way To Do It ???

Jon Hulatt22-Feb-02 4:30

Jon Hulatt

22-Feb-02 4:30

Hi.

I have two classes, CMyFirstClass and CMySecondClass.

MyFirstClass creates CMySecondClass objects dynamically. It is NEVER appropriate to create a CMySecondClass outside of the CMyFirstClass object.

To make things tidier, i put the declaration of CMySecondClass inside of CMyFirstClass. Now I have a shorter list in Class View. And my app still works.

My question: Is this a good idea? is there a compelling reason NOT to nest class declarations?

Jon

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Re: Which is The Best Way To Do It ???

Braulio Dez22-Feb-02 4:32

Braulio Dez

22-Feb-02 4:32

Hi,

Nested classes are quite heavy used in MFC, If I´m not wrong ( or if the things haven´t change this times Smile | :)

), for example is how MFC creates COM objects ( the macros for the interfaces, declare just nested classes), so I think it´s ok.

HTH
Braulio

Re: Which is The Best Way To Do It ???

Mazdak22-Feb-02 4:39

Mazdak

22-Feb-02 4:39

Jon Hulatt wrote:
Is this a good idea?

why not?

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: Which is The Best Way To Do It ???

Not Active22-Feb-02 4:41

Not Active

22-Feb-02 4:41

I think it is more a style thing. Unless it is a very small class utility class I don't like to nest classes. Makes it harder to read otherwise. Just my opinion though.

Re: Which is The Best Way To Do It ???

Joaquín M López Muñoz22-Feb-02 4:43

Joaquín M López Muñoz

22-Feb-02 4:43

You don't prevent third code from creating CMySecondCLasses just by defining it into CMyFirstClass. It is required also that:

The nested class lies in the private part of the nesting class,
or the constructors for the nested class are private and the nesting class is a friend of the nested class

Apart from this, nesting it is an excellent way to restrict visiblity and show design dependencies between classes (IMHO).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Which is The Best Way To Do It ???

Jon Hulatt22-Feb-02 4:48

Jon Hulatt

22-Feb-02 4:48

The declaration of the second class is within a protected: section.
Doesn't really bother me if technically i could create an instance of the second class elsewhere, it's definately more of a design and organisation thing.

I just wondered if i was overlooking some limitation or side effect of class nesting.

Obviously not, great!

Sorry to dissapoint you all with my lack of a witty or poignant signature.

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