C / C++ / MFC Discussion Boards

Re: using timers

Jamie Hale6-Feb-02 8:38

Jamie Hale

6-Feb-02 8:38

Not again. Smile | :)

Re: using timers

Nish Nishant6-Feb-02 8:47

Nish Nishant

6-Feb-02 8:47

yeah. Not so soon anyway Smile | :)

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: using timers

Nish Nishant6-Feb-02 8:35

Nish Nishant

6-Feb-02 8:35

Post the code snippet for the function within which you get this error.

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Simple typo?

Ravi Bhavnani6-Feb-02 9:03

Ravi Bhavnani

6-Feb-02 9:03

[ Please don't send me email - instead reply to the forum. Thanks! ]

Rajveer wrote:
Here is the function that gave the error. I have marked the line where the error occured. And i've pasted the error message below.

void CTimersDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	CTime curTime = CTime::GetCurrentTime();
	switch(nIDEvent)
	{
	case ID_CLOCK_TIMER:
		m_sTime.Format("%d:%d:%d", curTime.GetHour(), curTime.GetMinute(), 
curTime.GetSecond());
		break;

	case ID_COUNT_TIMER:         ///THE ERROR OCCURED ON THIS LINE!!!///
		m_iCount++;
		m_sCount.Format("%d", m_iCount);
		break;
	}

	UpdateData(FALSE);

	CDialog::OnTimer(nIDEvent);
}

You can't have 2 cases (i.e. 2 occurences of ID_CLOCK_TIMER) in the same switch statement. Looks like you made a simple copy/paste error.

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

Re: Simple typo?

solex7-Feb-02 2:48

solex

7-Feb-02 2:48

He doesn't - he as ID_CLOCK_TIMER and ID_COUNT_TIMER but they both seem to have the same value.

A vast majority of our imports comes from outside the country.
George W. Bush

Re: Simple typo?

Ravi Bhavnani7-Feb-02 2:54

Ravi Bhavnani

7-Feb-02 2:54

Ooops! Sorry, my dyslexia got the better of me. Smile | :)

/ravi

"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com

<complex> !?!

Joel Holdsworth6-Feb-02 7:08

Joel Holdsworth

6-Feb-02 7:08

Hi,
I've just tried to use the c++ complex library in vc6, but if I use the complex template like this

complex<double> foo; //Definition of a variable

for some reason a compile error is generated:

error C2143: syntax error : missing ';' before '<'

does anyone know why this happens, how to avoid it, and why is the complex header file called "complex", and not "complex.h"?

With time we live, with money we spend!
Joel Holdsworth

Re: <complex> !?!

Joaquín M López Muñoz6-Feb-02 7:16

Joaquín M López Muñoz

6-Feb-02 7:16

insert

using namespace std;

between the #include and the first use of complex.
If you don't know what std goes about, I suggest you read the "namespaces" section of any good C++ tutorial.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: <complex> !?!

Le centriste6-Feb-02 9:06

Le centriste

6-Feb-02 9:06

try

std::complex<double> foo;

CControlBar won't go away

6-Feb-02 4:38

Hi,

I have several toolbars and control bars in my application. I load different ones depending on the type of document loaded at the time. Hence, if I close one document type and open another I get different combinations of control bars.

My problem is that when I unload the control bars they do not destroy properly, the client area (i.e. the grey panel) for the control bar remains.

Is there a key step that I have missed in the process of closing a ControlBar?

The same is also true for the toolbars underneath the menus.

Matthew

Re: CControlBar won't go away

56789012346-Feb-02 5:14

5678901234

6-Feb-02 5:14

I think MFC sample CTRLBARS can help you. Toolbars are not unloaded or destroyed in it, they are just hidden. From user point of view this is the same.

Re: CControlBar won't go away

Xon6-Feb-02 10:49

Xon

6-Feb-02 10:49

Hello,
I think You can use RecalcLayout() function to solve this problem.

Peter

Re: CControlBar won't go away

Derek Waters6-Feb-02 13:02

Derek Waters

6-Feb-02 13:02

For control bars that belong to a particular CFrameWnd, you need to use the ShowControlBar() function rather than just calling CMyControlBar::ShowWindow(SW_HIDE). For example:

CMyDialogBar m_barHelper;

void CMyFrame::OnMDIActivate(BOOL bActivate, ...)
{
  if (bActivate)
    ShowControlBar(&m_barHelper, TRUE, FALSE);
  else
    ShowControlBar(&m_barHelper, FALSE, FALSE);
}

------------------------
Derek Waters
derek@lj-oz.com

Big/Small Tic marks on CSliderCtrl

Jerry Wang6-Feb-02 4:38

Jerry Wang

6-Feb-02 4:38

Hi everyone,

A quick question-- Does anyone know if it is possible to have big and small tic marks on a CSliderCtrl? I have a slider that has the range -100 to 100, and I would like to have small tic marks every 10, while having a big tic mark at 0, which marks the middle of the slider.

I am using

m_PCWF_slider.SetTicFreq(10);<br />
m_PCWF_slider.SetPageSize(5);<br />

Thanks for the help!

Re: Big/Small Tic marks on CSliderCtrl

Mazdak6-Feb-02 5:00

Mazdak

6-Feb-02 5:00

Check this:
http://www.codeproject.com/miscctrl/transparentslider.asp

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: Big/Small Tic marks on CSliderCtrl

Jerry Wang6-Feb-02 5:10

Jerry Wang

6-Feb-02 5:10

Yes, I read Nic Wilson's article already. Unfortuantely it does not help me though. I am looking for sliders with big and small tic marks.

ActiveX (ATL) question?

jancsi6-Feb-02 4:30

jancsi

6-Feb-02 4:30

I created an ATL project and inserted into it a Composite Control Object.
It works fine , but need to read some info from the browser specified in the
OBJECT tag
<object>
...
...
<param name="myparam" value="MyValue"
<="" object="" />

How I read the MyValue from my ATL Composite Control?

Thankx Eek! | :eek:

xxx

Re: ActiveX (ATL) question?

alex.barylski6-Feb-02 5:16

alex.barylski

6-Feb-02 5:16

I figure you would have better luck in the COM section.

You wanna use the <param /> tag.

I dunno if i'm right with the following(i'm tired haven't slept yet) but I think what you want is custom properties in COM there is no such thing as just assigning values to your object data members, you MUST use get/set mutators and accessors. Your gonna need something similar to this:

STDMETHODIMP IMyInterface::get_MyAttrib(BSTR* pVal)
{
  m_MyMember = *pVal;
  return S_OK;
}

//Also you need some way to tie the attribute to your variable
//This is accomplished through IDL, I don't have a reference handy so don't ask...

This might be entirely wrong, but will give you some starting ground

p.s-If your building a control for web sites only...have you considered using IE lite...? less overhead and better suited for webpages. Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: ActiveX (ATL) question?

Paul M Watt6-Feb-02 8:40

Paul M Watt

6-Feb-02 8:40

Besides creating the get and set member functions for the member variable, you will need to derive your class from IPersist.

Re: ActiveX (ATL) question?

Paul M Watt7-Feb-02 10:35

Paul M Watt

7-Feb-02 10:35

You are not bothering me, I like to help.

Anyways, here are some segments of code from a control that I wrote. First declare the property get_ and put_ functions in idl.

<br />
	[<br />
		object,<br />
		uuid(...),<br />
		dual,<br />
		helpstring("IHTMLInfoCtl Interface"),<br />
		pointer_default(unique)<br />
	]<br />
	interface IHTMLInfoCtl : IDispatch<br />
	{<br />
		[propput, id(0)]<br />
		HRESULT URL([in]BSTR pVal);<br />
		[propget, id(0)]<br />
		HRESULT URL([out,retval]BSTR* newVal);<br />
	};<br />

Next implement these functions in your class interface.
The key to tying the data together is deriving your ATL object from the IPersistStream interface, then providing one of the IPersist implementations. I used IPersistePropertyBagImpl and it
works fine. I am not sure, but I think that One of the IPersistxxx classes that I have declared may not need to be declared, but this code works for me.

<br />
class ATL_NO_VTABLE CHTMLInfoCtl : <br />
	public CComObjectRootEx<CComSingleThreadModel>,<br />
	public CComCoClass<CHTMLInfoCtl, &CLSID_HTMLInfoCtl>,<br />
        ...<br />
	public IPersistStreamInitImpl<CHTMLInfoCtl>,<br />
	public IPersistStorageImpl<CHTMLInfoCtl>,<br />
        ...<br />
	public IPersistPropertyBagImpl<CHTMLInfoCtl>,<br />
        ...<br />
{<br />
<br />
public:<br />
	CHTMLInfoCtl();<br />
	~CHTMLInfoCtl();<br />
<br />
        ...<br />
<br />

One final thing, add the IPersist entries to your COM map here.

<br />
BEGIN_COM_MAP(CHTMLInfoCtl)<br />
	COM_INTERFACE_ENTRY(IHTMLInfoCtl)<br />
        ...<br />
	COM_INTERFACE_ENTRY(IPersistStorage)<br />
	COM_INTERFACE_ENTRY(IPersistStreamInit)<br />
	COM_INTERFACE_ENTRY2(IPersist, IPersistStreamInit)<br />
	COM_INTERFACE_ENTRY_IID(IID_IPersist, IPersistPropertyBag)<br />
	COM_INTERFACE_ENTRY(IPersistPropertyBag)<br />
END_COM_MAP()<br />
<br />
BEGIN_PROP_MAP(CHTMLInfoCtl)<br />
	PROP_ENTRY("URL", 0, CLSID_NULL)<br />
END_PROP_MAP()<br />
<br />
// IHTMLInfoCtl<br />
public:<br />
	STDMETHOD(get_URL)(BSTR *pVal);<br />
	STDMETHOD(put_URL)(BSTR newURL);<br />
private:<br />
	CComBSTR	m_bstrURL;<br />
};<br />

let me know if you have other questions.

Input Reading?

6-Feb-02 4:21

I want to check the first letter of my input. and based on that take certain actions.
here is the input :
S 000-00-0001 C 20
B 000-00-0001 C 20
B 000-00-0002 CD 10
B 000-00-0002 JDSU 50
S 000-00-0002 CD 5
B 000-00-0010 TXN 30
B 000-00-0010 TYC 20
B 000-00-0009 WCOM 20
S 000-00-0009 WCOM 10
C citigroupinc 57

any ideas out there
thank you.

Re: Input Reading?

Carlos Antollini6-Feb-02 4:29

Carlos Antollini

6-Feb-02 4:29

Please is Easy...
You need to read the string until the first space....

Reagrds...

At the source of every error which is blamed on the computer, you will find at least two human errors, including the error of blaming it on the computer

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Input Reading?

Carlos Antollini6-Feb-02 4:29

Carlos Antollini

6-Feb-02 4:29

Please is Easy...
You need to read the string until the first space....

Regards...

At the source of every error which is blamed on the computer, you will find at least two human errors, including the error of blaming it on the computer

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Input Reading?

Nish Nishant6-Feb-02 4:40

Nish Nishant

6-Feb-02 4:40

That should be pretty straightforward. If the char array where you have the input is pStr1 then pStr1[0] would be the first character in your string. Now use a switch-case construct.

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: Input Reading?

lucy6-Feb-02 6:48

lucy

6-Feb-02 6:48

does this help?

char buffer[200];
gets(buffer); // get the whole line of user input
trimfrontspaces(buffer);// get rid of any spaces before the first character
swich(*buffer)
{
case 'B': break;
case 'S': break;
case 'C': break;
default: break;
}

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