GetActiveIndex() from a PropertySheet - C / C++ / MFC Discussion Boards

26-Mar-02 3:42

what do you mean by
" But this tree ctrl is of type CTreeCtrl and not of any class derived from CTreeCtrl. "

anyway,add the handler when the id of the tree is selected in the id list of the class wizard.you might have added for the dialog itself.

bye.

Re: WM_LBUTTONDOWN

NC26-Mar-02 4:13

26-Mar-02 4:13

Hi!
Thanks for replying.

There is not WM_LBUTTONDOWN for the tree ctrl. How else can I add this to message map and also add a handler?

Thanks,

NC

Re: WM_LBUTTONDOWN

Carlos Antollini26-Mar-02 3:45

Carlos Antollini

26-Mar-02 3:45

You need to Know if the pointer is in the TreeCtrol....
Get the mouse Pointer Position and ask if into the Square that define the control

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: WM_LBUTTONDOWN

NC26-Mar-02 4:14

26-Mar-02 4:14

Hi!
Thanks for answering.

Where do I check if the mouse position is on the tree ctrl?

Thanks,

NC

Re: WM_LBUTTONDOWN

Carlos Antollini26-Mar-02 9:03

Carlos Antollini

26-Mar-02 9:03

You can use CRect::PtInRect where the point is the mouse pointer and the Rect the TreeControl coordinates. Don't forguet to call CRect::NormalizeRect Before to call PtInRect Wink | ;)

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: WM_LBUTTONDOWN

Carlos Antollini26-Mar-02 9:03

Carlos Antollini

26-Mar-02 9:03

You can use CRect::PtInRect where the point is the mouse pointer and the Rect the TreeControl coordinates. Don't forguet to call CRect::NormalizeRect Before to call PtInRect Wink | ;)

Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: WM_LBUTTONDOWN

Roger Allen26-Mar-02 6:24

Roger Allen

26-Mar-02 6:24

As you want to handle the WM_LBUTTONDOWN before it goes to the TreeCtrl, I would override PreTranslateMessage() as follows:

BOOL CYourDialog::PreTranslateMessage(MSG* pMsg) 
{
	if (pMsg->message == WM_LBUTTONDOWN)
		{
		// determine whether the mouse is on the tree ctrl
		CPoint p ;
		GetCursorPos(&p) ;
		CWnd *pWnd = GetWindowFromPoint(p) ;
		if (pWnd != NULL)
			{
			// its on a window, is it the correct window
			if (pWnd->GetDlgCtrlID() == ID_OF_TREE_CTRL && pWnd->GetParent() == this)
				{
				// its our tree control
				// put your code here
				}
			}
		}
	return CDialog::PreTranslateMessage(pMsg);
}

Its all written from memory, so some calls/parameters etc may not be correct, but it should do something close to what you need.

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.
A fool jabbers, while a wise man listens. But is he so wise to listen to the fool?

GetActiveIndex() from a PropertySheet

26-Mar-02 3:25

Hi, I am trying to use GetActiveIndex() in the property sheet to get the index of an active page. I encountered a problem in GetTabControl() which returns 0xcccccccc. I believe the setup of my property sheet and pages should be right by using DoModal() and AddPage(). Please give me some suggestions on troubleshooting this problem. Thanks!

Re: GetActiveIndex() from a PropertySheet

Tomasz Sowinski26-Mar-02 3:32

Tomasz Sowinski

26-Mar-02 3:32

Are you calling GetTabControl before DoModal?

Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **

Re: GetActiveIndex() from a PropertySheet

26-Mar-02 3:49

I called GetActiveIndex() after DoModal() and Addpages(). If I go straight to display data on the first page, it works fine when I am on the first page and vice versa on the other pages. However, I would like to display data by the active page which gives me more flexability.

Save Dialog Box

Anthony988726-Mar-02 3:21

Anthony9887

26-Mar-02 3:21

Hi, I'm trying to create a save dialog box with 2 filters. How can i update the extention in the filename whenever the "Save As Type" box is highlighted.

Thanks

debugging

Rajveer26-Mar-02 3:06

Rajveer

26-Mar-02 3:06

I've just started learning how to debug, and I'm still kinda new with C++ programming language.
I have two variables declared as doubles: x, slope
while debugging, I noticed that sometimes in the loop they're values came up as:
slope = 1.#INF000000000
x = -1.#IND000000000
what does that mean?....why does it happen?

Re: debugging

Tim Smith26-Mar-02 3:21

Tim Smith

26-Mar-02 3:21

(EDIT: Corrections)

1.#INF stands for positive infinity.
1.#IND stands for positive ideterminite.

If you add a negative, then they are negative infinity.

This can happen if a variable has yet to be initialized. It can also happen during ASCII to float conversions and math operations.

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: debugging

26-Mar-02 3:58

So can I use that value just like other values in my code, for example in an if statement, could I say:
if(x==1.#INF)
{
//do stuff
}

or when I say
if(x>=9000)
{
//do stuff
}

will the infinite value be regarded as greater than 9000?

Re: debugging

Tim Smith26-Mar-02 5:16

Tim Smith

26-Mar-02 5:16

You can use _finite to test to see if a value is finite. Thus your NAN, QNAN, INF, IND should return false. (???)

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: debugging

Tomasz Sowinski26-Mar-02 3:24

Tomasz Sowinski

26-Mar-02 3:24

1.#INF means positive infinity - usually you get it when you divide by zero. 1.#IND represents so-called 'quiet-nan' - for example, when you take the logarithm of negative value.

Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **

Re: debugging

26-Mar-02 3:59

Re: debugging

DRHuff26-Mar-02 10:58

DRHuff

26-Mar-02 10:58

Don't - instead figure out what is setting the bad values.

Those numbers indicate that you are doing something wrong. If the variables are uninitialized there is no guarantee that they will always be the same. If you are dividing by 0 or taking the log of a negative number you should be checking your inputs because they are faulty.

Dave Huff

There are no small projects - only young ones.

Re: We were both wrong Tom

Tim Smith26-Mar-02 5:13

Tim Smith

26-Mar-02 5:13

1.INF/-1.INF = Positive/Negative infinity
1.IND/-1.IND = Positive/Negative indeterminate
1.QNAN/-1.QNAN = Positive/Negative quiet not-a-number
1.NAN/-1.NAN = Positive/Negative not-a-number

IEEE Reference information

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?

How to show and handle CFormView in ActiveX

sanskypotov26-Mar-02 2:59

sanskypotov

26-Mar-02 2:59

Hi,
Can someone tell me ,
How to show and handle CFormView in
an ActiveX Control.
Thanks,
Sansky Big Grin | :-D

God is Good, all the Time.
All the Time, God is Good.

Re: How to show and handle CFormView in ActiveX

Michael P Butler26-Mar-02 3:24

Michael P Butler

26-Mar-02 3:24

FormView wasn't really designed for placing in an activex control. What are you try to achieve as there may be a better way.

I'm guessing you are wanting an activex control made up on a number of other controls? Have a search on MSDN for composite controls.

Michael Smile | :)

Thanks, but according to Q155973

sanskypotov26-Mar-02 19:52

sanskypotov

26-Mar-02 19:52

Hi,
Actually trying to develop an ActiveX , where I can
show other some ActiveX's , which also needs to be dragged.
So I believe that I need CFormView for this.
According to the art Q155973, this is possible , but I am
unable to find the sample DLGX.EXE at microsoft.com,
any suggestions . Big Grin | :-D

God is Good, all the Time.
All the Time, God is Good.

Re: How to show and handle CFormView in ActiveX

Joaquín M López Muñoz26-Mar-02 3:25

Joaquín M López Muñoz

26-Mar-02 3:25

If you do not intend to take advantage of SDI/MDI architecture, it's much easier to embed a CDialog-based object, just by specifying the ActiveX window as the parent when creating the dialog. Some CRect arithmetic could be needed too in the process of embedding. If you follow this approach, you can even get scroll bars without much effort.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Finding tree root

26-Mar-02 3:04

hi,
1.how to find weather the item clicked is a root or leaf in a tree.

2.should the menu resource be initialised or something before loading it to diaplay popup menu because I get run time error saying the handle is null. I use the same procedure said all over this site.

help
Cry | :((

Re: Finding tree root

Tomasz Sowinski26-Mar-02 3:38

Tomasz Sowinski

26-Mar-02 3:38

Regarding (1):

Handle WM_LBUTTONDOWN. Use CTreeCtrl::HitTest to get HTREEITEM. CTreeCtrl::GetRootItem returns root, so simple comparison of HTREEITEMS will answer your question. If you need to check if item is leaf, call CTreeCtrl::GetChildItem and pass clicked HTREEITEM - if it returns NULL, your item is a leaf.

Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **

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