C / C++ / MFC Discussion Boards

David Crow21-Sep-05 3:12

21-Sep-05 3:12

bugDanny wrote:
Can the member variable connected to those controls work as the window handle, or houw can this be done?

Why not just use CWnd::GetWindowRect() and CWnd::MoveWindow()? No handle required.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Moving controls on a dialog

prasad_som21-Sep-05 3:15

prasad_som

21-Sep-05 3:15

You can use control variable associated with it.Alternatively ,Use GetDlgItem() for getting control windows and use those.

Re: Moving controls on a dialog

andrewtruckle21-Sep-05 3:23

andrewtruckle

21-Sep-05 3:23

Depending on what you want to do, there is also some nice articles on here for dynamically moving all controls when resizing dialogues.

I tend to map controsl to control variables and use their own move methods, eg:

m_btnOK.MoveWindow(...);

Rather than:

pWnd = GetDlgItem(IDOK)
if(pWnd != NULL)
pWnd->MoveWindow(...)

Mapping variables to the controls uses less code and no need to worry about correct id values, null pointers etc.

HTH.

Andrew

Re: Moving controls on a dialog

Rage21-Sep-05 3:18

Rage

21-Sep-05 3:18

Most controls are directly derived from CWnd, in which case you can use the CWnd member function of ::GetWindowRect() and ::MoveWindow(), meaning :

RECT rect;
m_mycontrol.GetWindowRect(&rect);

If you absolutley want to use the upper scope functions, you can retrieve the HWND using GetSafeHwnd()

HWND hWnd = m_mycontrol.GetSafeHwnd()

BTW, you might want to consider also GetClientRect(), as well as ScreenToClient() and ClientToScreen() to play around moving controls, because I am afraid that the two functions you mentioned will not be sufficient.

Hope this helps,

~RaGE();

Re: Moving controls on a dialog

bugDanny21-Sep-05 4:56

bugDanny

21-Sep-05 4:56

Thanks all!

Danny

Inserting values into tree recursively

rajeevktripathi21-Sep-05 1:54

rajeevktripathi

21-Sep-05 1:54

Hi All

I am making an application in which I have to insert the values into the tree recursively.

I have been stucked that how should I do this?

I am using CTreeCtrl class of MFC for tree control.
So Please help me ...

Thanks.

Re: Inserting values into tree recursively

David Crow21-Sep-05 3:18

David Crow

21-Sep-05 3:18

Recursion simply means that a function calls itself. What are you populating the tree control with?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Inserting values into tree recursively

rajeevktripathi21-Sep-05 3:49

rajeevktripathi

21-Sep-05 3:49

Infact I want to insert a node into the tree

- Then all the subnodes of that node will be called recursively and being inserted into the tree.

What I am doing is as follows

<br />
<br />
/*------------------------------------------------------------------------------<br />
<br />
<br />
int iFLAG = 1;<br />
void CShowFolders::AddFolders(STOREFOLDERID dwFolderId)<br />
{<br />
FOLDERPROPS props;<br />
HENUMSTORE hEnum;<br />
int nIndex;<br />
<br />
hEnum = NULL;<br />
<br />
<br />
// set the size of the structure or the function return error<br />
props.cbSize = sizeof(FOLDERPROPS);<br />
<br />
HRESULT hr = m_pStoreNamespace->GetFirstSubFolder(dwFolderId, &props, &hEnum);<br />
<br />
<br />
while(SUCCEEDED(hr) && hr != S_FALSE && hEnum != NULL)<br />
{<br />
<br />
if(iFLAG)<br />
htMailFolder=TreeObj.InsertItem(props.szName,TVI_ROOT,NULL);<br />
else<br />
TreeObj.InsertItem(props.szName,htMailFolder);<br />
<br />
if(nIndex != LB_ERR && nIndex != LB_ERRSPACE)<br />
{<br />
// set the folder id as the data of the item<br />
m_listFolder.SetItemData(nIndex, props.dwFolderId);<br />
<br />
TreeObj.SetItemData(htMailFolder,props.dwFolderId);<br />
iFLAG = 0;<br />
// add children of this folder too<br />
AddFolders(props.dwFolderId);<br />
<br />
}<br />
<br />
<br />
hr = m_pStoreNamespace->GetNextSubFolder(hEnum, &props);<br />
iFLAG = 1;<br />
}<br />
<br />
<br />
// close the enum<br />
if(hEnum) {<br />
m_pStoreNamespace->GetSubFolderClose(hEnum);<br />
<br />
}<br />
}<br />
<br />
/*---------------------------------------------------------------------<br />
<br />
<br />
<br />

Now I want to insert all the local folders of Outlook Express into the tree as it looked into the Outlook Express .

But The tree from this code is not resembling to that one.

So please tell how should I modify programm to look like Outlook Express.

From the code it is clear that it enumerates all the folders & subfolders of outlook exress , So I want to display it in the tree form.

Note that

"m_pStoreNamespace is the object of Interface IStoreNameSpace"

Please reply.

Re: Inserting values into tree recursively

David Crow21-Sep-05 4:05

David Crow

21-Sep-05 4:05

I see you are using code from this article. So what exactly is or is not happening? Does the tree control get populated at all? Are items missing? Is the hierarchy wrong?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: Inserting values into tree recursively

rajeevktripathi21-Sep-05 18:15

rajeevktripathi

21-Sep-05 18:15

Ya I am using sample from the link You have mentioned.

As I told I want to insert the folders & subfolders of the outlook express in the order as it is in outlook express to make user interface better, as in the article values are inserted into listbox.

So please suggest me.

Thanks

Re: Inserting values into tree recursively

David Crow22-Sep-05 2:27

David Crow

22-Sep-05 2:27

rajeevktripathi wrote:
As I told I want to insert the folders & subfolders of the outlook express in the order as it is in outlook express...

If the items are being inserted correctly but are just in the wrong order, it sounds like you need to add the items to some data structure first, sort them, and then add them to the tree control. If that does not sound right, you'll need to better explain what your program is doing that is not right (that's why I asked those other three questions).

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Using Reliable UDP

V.G21-Sep-05 1:41

V.G

21-Sep-05 1:41

HI!!
for developing a download manager utility... i will have to use reliable udp to ensure that packets are not lost and are deliv'rd in proper order.... how do i implement it?

V.G

Re: Using Reliable UDP

Mohammad A Gdeisat21-Sep-05 5:34

Mohammad A Gdeisat

21-Sep-05 5:34

Hi,

You cant ensure that messages sent over UDP will arrive in the order they were sent in, however, you can add an int (order) to the message structure indicating the order of the sent message, then you can re-arrange these messages according to that number.

To ensure that all messages arrive, implement a hand shaking mechanism. Something like:

1. Send a Message to the other end.
2. Mark it as "did not reach" i your program.
3. If the message reaches its destination, the destination sends an acknowledgment

4. After a predefined timout, if no acknowledment arrives, resend the message with the same order.

Good luck

Using ActiveX wrapper class in MFC console

yccheok21-Sep-05 0:12

yccheok

21-Sep-05 0:12

Previously, I have an ActiveX control which I use it in my MFC GUI program.

The wrapper class (inheritanced from CWnd) for the activex control is generated automatically through class wizard. Everything just work fine.

Now, I need my application to work in non-gui mode. Hence, no dialog or windows will be created to host the active x control.

I just copy the ActiveX wrapper class file, which is generated previously, into my console project. i realize that a runtime error will occur whenever i try to use the active x control. this is because there is no dialog/ or windows to host that activex control.

I read an article at http://www.codeproject.com/com/consoleactivex.asp
The author shows the way by using COM. However, i am not familiar with COM. I prefer to use back the wizard generated wrapper source code, which is much more easier.

may i noe how can i solve this problem? do i need to created a hidden window for it? or is there better way?

thanks!

cheok

Re: Using ActiveX wrapper class in MFC console

Calc2021-Sep-05 2:56

Calc20

21-Sep-05 2:56

Use the class wizard to generate a wrapper class, not derived from CWnd, but from COleDispatchDriver.
In ClassWizard click Add Class then select From a type libary and select the .tlb file of your control.
After you have the wrapper class call CoCreateInstance to create the object, something like:

IDispatch* pDisp;
CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, dispid, &pDisp);

where clsid is the class id for the object, dispid is the ID of object's IDispatch interface

After a successful call of CoCreateInstance use the AttachDispatch method from the wrapper class and then you can call ActiveX methods, like this:

CWrapperClass myDisp;

myDisp.AttachDispatch(pDisp);
myDisp.SomeActiveXMethod();

Remember to call CoInitialize before CoCreateInstance and when you're done using the object call pDisp->Release() in order to decrement the object's reference count and destroy it.

Re: Using ActiveX wrapper class in MFC console

yccheok22-Sep-05 15:32

yccheok

22-Sep-05 15:32

Thanks. Using COleDispatchDriver as parent class really work!

I didn't use AttachDispatch since I cann't make it works. Most probably I miss out something. However, by using CreateDispatch just rock Smile | :)

I assume there is no clean up needed after CreateDispatch from the MSDN example.

Thanks for help!

cheok

Who have used the component called ProEssentials

sssmmmyyy20-Sep-05 23:58

sssmmmyyy

20-Sep-05 23:58

This component is produced by Giga.INC. Please give me some information and suggestion of this. Thanks!

How??Max,size of Dialog Box

a_david12320-Sep-05 23:39

a_david123

20-Sep-05 23:39

Respected all

I have picturebox on my DialogBox(Dialog based MFC app) ,, when I run my prog, the bitmap displayed on picture box but when the size of bitmap s max then problem r coming b/c the Dialog boc which have a picture box has its feault sizze so how i can change the size of dialog box to its max, size.
so that no problem to me while to display large bitmaps.

Thanking u people

david

Re: How??Max,size of Dialog Box

John R. Shaw21-Sep-05 0:49

John R. Shaw

21-Sep-05 0:49

Recommend reading the articles at CP on resizable dialogboxes.

I also recommend that you write your questions in english; I lost you at "s max", "r", "Dialog boc" and "feault sizze", so I have no idea if my interpretations where even close to correct.

INTP
Every thing is relative...

Re: How??Max,size of Dialog Box

bugDanny21-Sep-05 3:00

bugDanny

21-Sep-05 3:00

Try ShowWindow(SW_MAXIMIZE). Look up ShowWindow on MSDN for all kinds of other uses.

Danny

Dialog inside MDI application

Russell^'20-Sep-05 23:31

Russell^'

20-Sep-05 23:31

Is there a property of a CDialog to set the object INSIDE the MainFrame, like the ChildFrame in an MDI application? That is: I don't want that the Dialog could exit from the border of the main frame, but I want that that border hides a portion of the dialog (if it is trying to come outside).
Thanks

Re: Dialog inside MDI application

toxcct21-Sep-05 1:22

toxcct

21-Sep-05 1:22

if you look at the CDialog constructor, you'll see that it gets a CWnd* parameter named Parent...

so, when your MDI creates the dialog box, it passes this to the constructor and that should work...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Dialog inside MDI application

Russell^'21-Sep-05 1:40

Russell^'

21-Sep-05 1:40

Hi,
I tryed it, but didn't change nothing...I think that this is only a way to set the relations between the windows (like the closing order).
I'm quite sure that my problem could solve changing some flag(s) into the dialog style/properties,... but what? Confused | :confused:

Re: Dialog inside MDI application

prasad_som21-Sep-05 2:22

prasad_som

21-Sep-05 2:22

You were so close.In properties tab set Style to child rather than overlapped or pop up Smile | :)

Re: Dialog inside MDI application

Russell^'21-Sep-05 4:40

Russell^'

21-Sep-05 4:40

Hi, thanks for your help.
I think that we are near to the solution.
But...ehm...
I change the style-flag... and the program tilts.
Try to change that flag with the about-box on an MDI program.

What I'm wronging?

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