C / C++ / MFC

18-Dec-02 2:41

I'm currently working with an MDI application and RogueWave's Stingray library. I'm using their SECControlBar class for a dockable window which will contain 2 tree controls selectable by tabs. I have the trees working and the tabs working, but I'm trying to keep all my data in the Document class of my MDI. This SECControlBar class is not doc/view based, it's just a CWnd derivative. My question is how do i get access to my document class via this CWnd derived dockable window? Normally i just use a GetDocument for my view classes to obtain the related document but there is no such function i can see for the same thing from this CWnd derivative.

Thanks for you time.

Jeff Rothenberg

Project Engineer
Vector CANtech, Inc.

Maximilien18-Dec-02 2:46

Maximilien

18-Dec-02 2:46

Look for GetActiveView ( from CFrameWnd ) call this on the MainFrame ( AfxGetMainWnd ), and with the view, you GetDocument.

Max.

electronicman_x18-Dec-02 3:56

18-Dec-02 3:56

I attempted your suggestion with this code:

void ModuleTab::OnModulemenuAddchannel()
{
// TODO: Add your command handler code here
CString display;
int work;
AfxMessageBox(_T("add channel. later."));
//start
CFrameWnd* pMWnd;
pMWnd=(CFrameWnd *)AfxGetMainWnd();
CView* pVWnd;
pVWnd=pMWnd->GetActiveView();
CGENyDoc* pDoc;
pDoc=(CGENyDoc *)pVWnd->GetDocument();//fails debug assertion here.
//end
work=pDoc->m_myint;
work++;
pDoc->m_myint=work;
display.Format(_T(" value: %d"),work);
AfxMessageBox(display);
Invalidate();
}

It fails where i call get document. It appears that I'm getting the wrong pointer.

Any suggestions?

Jeff Rothenberg

Project Engineer
Vector CANtech, Inc.

Maximilien18-Dec-02 3:58

Maximilien

18-Dec-02 3:58

I'm sorry, I was too fast to answer : The view is inside a frame window.

I do this to get the view:

CMainFrame *pMainFrame = ( CMainFrame* )AfxGetMainWnd();
ASSERT( pMainFrame );
CMDIChildWnd *pChild = (CMDIChildWnd *) pMainFrame->GetActiveFrame();
CView* pView = pChild->GetActiveView();

Max.

electronicman_x18-Dec-02 4:02

18-Dec-02 4:02

Great!! works good thanks

Jeff Rothenberg

Project Engineer
Vector CANtech, Inc.

Play a sound?

kvan0718-Dec-02 2:34

kvan07

18-Dec-02 2:34

What's the easiest way to play a sound. Does VS have a function that will do this?

Re: Play a sound?

Daniel Strigl18-Dec-02 2:57

Daniel Strigl

18-Dec-02 2:57

Try the PlaySound(...) API function!

Daniel Wink | ;)

---------------------------
Never change a running system!

UpdateData won't cut it

18-Dec-02 2:29

I am designing a program that acts as a countdown timer. However, because the function called from the GUI doesn't stop running until the time has decremented to zero, the GUI can't show how much time is remaining. Here's the source:

void CtimerDlg::OnBnClickedStart()
{
int currentTime = 0;
int timeInSeconds = 0;
char min[5] = "";
char sec[5] = "";
char setTime[12] = "";

UpdateData(true);

currentTime = time(NULL);
minutesRemaining = setMinutes;
secondsRemaining = setSeconds;

sprintf(min, "%i", setMinutes);
sprintf(sec, "%i", setSeconds);
strcpy(setTime, min);
strcat(setTime, " : ");
strcat(setTime, sec);
startTime = setTime;

timeInSeconds = ((setMinutes * 60) + setSeconds);

while(timeInSeconds != 0)
{
if(currentTime != time(NULL))
{
if(secondsRemaining == 0)
secondsRemaining = 60;

timeInSeconds--;
secondsRemaining--;
sprintf(sec, "%i", secondsRemaining);
secLeft.SetWindowText(sec);

currentTime = time(NULL);
}

if(secondsRemaining == 59)
{
minutesRemaining--;
sprintf(min, "%i", minutesRemaining);
minLeft.SetWindowText(min);
}
}

UpdateData(false);
}
// end code

How can I get the GUI to update while the progam is executing?

-Thanks

electronicman_x18-Dec-02 2:42

18-Dec-02 2:42

Maybe you should spawn a thread to countdown?

Jeff Rothenberg

Project Engineer
Vector CANtech, Inc.

benjymous18-Dec-02 3:32

benjymous

18-Dec-02 3:32

I'd use a timer instead, then you can have a handler function that gets called every second, which will allow normal GUI operations to continue

--
Help me! I'm turning into a grapefruit!

valikac18-Dec-02 5:34

valikac

18-Dec-02 5:34

There are several soltuions. One solutin is a timer queue timer that will call a callback after upon tick.

Kuphryn

CDC::GetTextExtent problem

Ravi Bhavnani18-Dec-02 10:39

Ravi Bhavnani

18-Dec-02 10:39

kvan07 wrote:
How can I get the GUI to update while the progam is executing?

Pump the message queue. See my TaskTimer[^] article for instructions.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Brian van der Beek18-Dec-02 0:26

Brian van der Beek

18-Dec-02 0:26

Hi,

I have a CTreeCtrl with a font set to 'Courier'. When I try to determine the width of a text item in the tree I do something like:

<br />
  CDC* pDC = m_ctrlTree.GetDC();<br />
  int nItemWidth = pDC->GetTextExtent(strItem).cx;<br />

The width I receive is smaller than the actual text width. It seems that the font of the DC ('system') is not equal to the font of the tree control ('courier').

Does anyone know how this can be?

Joaquín M López Muñoz18-Dec-02 1:24

Joaquín M López Muñoz

18-Dec-02 1:24

Try this (I haven't tested it, but it might work):

CDC* pDC = m_ctrlTree.GetDC();
CFont *pFont=pDC->SelectFont(m_ctrlTree.GetFont());
int nItemWidth = pDC->GetTextExtent(strItem).cx;
pDC->SelectFont(pFont);

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Brian van der Beek18-Dec-02 1:32

Brian van der Beek

18-Dec-02 1:32

Thanx for your reply, but the CDC does not have a SelectFont.

Joaquín M López Muñoz18-Dec-02 1:36

Joaquín M López Muñoz

18-Dec-02 1:36

It's a typo: Substitute SelectObject for SelectFont.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo