CDialog and Mouse clicks - C / C++ / MFC Discussion Boards

Re: How do you send a button click message to parent window

Maximilien22-Oct-07 8:55

Maximilien

22-Oct-07 8:55

Don't you have to send the message to the control itself ?

Maybe with something like :

CButton* pButton = (CButton*)GetTheButtonFromYourUI();
pButton->SendMessage( ... );

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: How do you send a button click message to parent window

David Crow22-Oct-07 9:00

David Crow

22-Oct-07 9:00

You send BM_CLICK to the button, which in turn, notifies the parent with a BN_CLICKED notification.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

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Re: How do you send a button click message to parent window

Randor 22-Oct-07 10:37

Randor

22-Oct-07 10:37

::SendDlgItemMessage(hWnd,IDC_EDIT_SOMEBTN,BM_CLICK,0,0);

Re: How do you send a button click message to parent window

Paresh Chitte22-Oct-07 19:05

Paresh Chitte

22-Oct-07 19:05

Use WM_COMMAND.

Please refer here[^] for more information.

Regards,
Paresh.

Re: How do you send a button click message to parent window

Naveen22-Oct-07 19:53

Naveen

22-Oct-07 19:53

littleGreenDude wrote:
am I on the right track

yes

GetParent()->SendMessage( WM_COMMAND, MAKEWPARAM(::GetDlgCtrlID( m_hWnd ), BN_CLICKED), (LPARAM)m_hWnd );

nave

[OpenedFileFinder]

Re: How do you send a button click message to parent window

Mark Salsbery23-Oct-07 8:57

Mark Salsbery

23-Oct-07 8:57

Maybe check out mouse_event()[^] as well.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

CTreeCtrl and SetRedraw

bob1697222-Oct-07 5:08

bob16972

22-Oct-07 5:08

I have a CTreeCtrl that I disable drawing on using SetRedraw(FALSE) while setting the nodes in an attempt to avoid refresh issues.

If I call DeleteAllItems() after I call SetRedraw(FALSE) and scrollbars had been visible, the refresh that hides the scrollbars still runs even before I call SetRedraw(TRUE) etc...

Ultimately, after I've rebuilt the tree, the scrollbars will usually still be needed and once again resurface. If the visible state of the scrollbars will be the same before and after I rebuild the tree, it would be desireable to completely disable the scrollbar refresh until the rebuild is completed.

Is there a way to completely disable redrawing, even with the scrollbars in a CTreeCtrl during tree refreshes?

CDialog and Mouse clicks

mcsherry22-Oct-07 4:33

mcsherry

22-Oct-07 4:33

What is the best way to detect if a user presses the L button down and releases it within a specified region on a dialog? The way I'm considering doing it is to use the OnLButtonDown and OnLButtonUp methods and set a bool flag when the user presses down whilst within this region and when they release the mouse to check this flag and then check if they are still in the region. Is this the best/recommended way of doing it or is there better more effient ways?

TIA,

Re: CDialog and Mouse clicks

Nishad S22-Oct-07 4:42

Nishad S

22-Oct-07 4:42

AFAIK, this is the one... Smile | :)

But you have to use the SetCapture also.

- NS -

Re: CDialog and Mouse clicks

mcsherry22-Oct-07 6:45

mcsherry

22-Oct-07 6:45

cheers, I implemented it as I described but also used SetCapture and ReleaseCapture and it worked a treat Big Grin | :-D

Re: CDialog and Mouse clicks

James R. Twine22-Oct-07 5:09

James R. Twine

22-Oct-07 5:09

   Detect a LButtonDown over the region, capture the mouse when this happens, and then wait for the LButtonUp message. If the LBU is over the region, react.

   Watch out for things like (De)activate and/or kill focus messages - if the user switches apps while holding down the mouse button, you will need to release the capture.

   The reason you do not want to just react to LBU is that the user could click and hold the mouse button down, and then drag it over to your app and release. This happens a lot by accident and you would not want to react to that accident. Try that with a standard button control and you will see what I mean.

   Peace!

-=- James
Please rate this message - let me know if I helped or not!<HR>If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
See DeleteFXPFiles

I/O Completion Port question

unknown10122-Oct-07 3:42

unknown101

22-Oct-07 3:42

hi, i got an I/O Completion Port question , one of socket called WSARecv(...) and waiting in GetQueuedCompletionStatus( ... ) .

While waiting, can i call WSASend(...) to send data to the socket ? Can buffer conflict if both WSARecv , WSASend return by GetQueuedCompletionStatus( ... ) at the same time by different thread ? If so , how can i prevent that? Thank you.

Re: I/O Completion Port question

led mike22-Oct-07 5:23

led mike

22-Oct-07 5:23

unknown101 wrote:
Can buffer conflict if both WSARecv , WSASend

We cannot no the answer for any memory your code is managing. The kernel buffers should not be a problem.

unknown101 wrote:
If so , how can i prevent that?

Using synchronization.

Dialog box

shir_k22-Oct-07 3:30

shir_k

22-Oct-07 3:30

Hi,

My project has a Modal dialog box(first dialog box)
1)First dialog box consist of a button, on clicking that button another modal dialog box(second dialog box) opens.
2)First dialog box also consist of tab control which consist of two tabs.Each tab has modelless dialog box.
My question is when i open the second dialog box(opens on pressing the button) the control will be with second dialog box as it is a modal dialog box but when i place it on one of the tab dialog box(the dialog size of the second dialog box is smaller than the dialog box on the tab) and a mouse click on the tab dialog box the control goes to tab dialog box,.Why?? How to avoid this. The second dialog box should have the control until i close it.
I hope you people got my quesion.

Thanks in advance

Re: Dialog box

David Crow22-Oct-07 3:38

David Crow

22-Oct-07 3:38

What is the parent/owner relationship between the first and second modal dialog boxes?

Re: Dialog box

shir_k22-Oct-07 3:46

shir_k

22-Oct-07 3:46

Thanks for reply.
First dialog box is a main application(User interface for the user).second dialog box is, if the user wants to change the COM port settings like baud rate or parity he has to open second dialog box which can be opened by pressing the button on the main application.

Re: Dialog box

David Crow22-Oct-07 3:51

David Crow

22-Oct-07 3:51

It matters not what they are used for. What is the parent/owner relationship between the first and second modal dialog boxes? Just because dialog A opens dialog B, that does not also imply that dialog A is the parent of dialog B, or that dialog B is owned by dialog A.

Re: Dialog box

shir_k22-Oct-07 4:04

shir_k

22-Oct-07 4:04

You are asking style of the window. Both are popup window style.
I hope i have answered your question if not let me know in detail.Am not getting what does parent/owner relationship means.Even tab windows are popup style.

shir_k22-Oct-07 4:24

22-Oct-07 4:24

Nelek22-Oct-07 4:27

22-Oct-07 4:27

Ok.

Are you using resource editor? or coding all by yourself?

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

Re: Dialog box

shir_k22-Oct-07 4:33

shir_k

22-Oct-07 4:33

Am using resource editor(MFC SDI project)

Re: Dialog box

Nelek29-Oct-07 21:44

Nelek

29-Oct-07 21:44

Then in the button to do the call, try it like:

void CMyButton::OnClick ()
{
CMySecondDlg newDlg;
if (IDCANCEL == newDlg.DoModal ())
return;

//More code
}

Disallowing dll use from development environment?

electronica80822-Oct-07 2:53

electronica808

22-Oct-07 2:53

Hypothetically, is there a way to create a DLL that will only work at runtime? Any attempt to use the DLL from a development environment would fail?

I am investigating some ways to protect intellectual property.

Any input would be greatly appreciated.

Re: Disallowing dll use from development environment?

Cedric Moonen22-Oct-07 2:55

Cedric Moonen

22-Oct-07 2:55

And what is the problem when loading your dll if the project is executed from the IDE ?
Did you think about distributing the release version of your dll ?

Cédric Moonen
Software developer

Charting control [v1.2]

Re: Disallowing dll use from development environment?

electronica80822-Oct-07 3:26

electronica808

22-Oct-07 3:26

Here is a hypothetical example...

Fred spends years developing a DLL to do intense mathematical computations. Bob buys a license to develop against and distribute Fred’s DLL with Bob’s application. Fred is worried other people will use his DLL in their own applications.

Just compiling the DLL in release mode will not stop people from using the DLL in Visual Studio, and releasing an application that uses it.

Is there any way to do this?

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