C / C++ / MFC

Re: How to show a progress dialog to a no window procedure

16-May-07 2:08

I compile your code but I think it doesnt receive WM_INITDIALOG and it seems that hProgress=0x00

WhiteSky

Mark Salsbery16-May-07 4:59

Mark Salsbery

16-May-07 4:59

zhongwenjia wrote:
what happen in your computer to run this precedure?

It worked fine (XP Pro, SP2).

I did have to add

INITCOMMONCONTROLSEX initcontrols;
initcontrols.dwSize = sizeof(INITCOMMONCONTROLSEX);
initcontrols.dwICC = ICC_PROGRESS_CLASS;
::InitCommonControlsEx(&initcontrols);

to get my dialog to create.

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: How to show a progress dialog to a no window procedure

Mark Salsbery16-May-07 5:14

Mark Salsbery

16-May-07 5:14

Here's your code, modified to use a thread synchronization object...

#define WM_DLGCREATED WM_USER+1
#define WM_PROGRESS WM_USER+2

typedef struct
{
HWND hDlg;
HANDLE hDlgCreatedEvent;
HWND hProgress;
HINSTANCE hInst;
}MyParams, *ptMyParams;

/*-----------------------------------------------------------------------*/
BOOL CALLBACK MyDlgProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam);
void Thread1(PVOID pvoid);

/*------------------------------------------------------------------------*/
void Thread1(PVOID pvoid)
{
ptMyParams pt=(ptMyParams)pvoid;
DialogBoxParam(pt->hInst, MAKEINTRESOURCE(IDD_DIALOG1), NULL, MyDlgProc, (LPARAM)pt);
_endthread();
}
/*------------------------------------------------------------------------*/
BOOL CALLBACK MyDlgProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
ptMyParams pt;

switch(Message)
{
case WM_INITDIALOG:
pt = (ptMyParams)lParam;
pt->hDlg = hWnd;
pt->hProgress = GetDlgItem(hWnd, IDC_PROGRESS1);
::PostMessage(hWnd, WM_DLGCREATED, 0, lParam);
return TRUE;
case WM_DLGCREATED:
pt = (ptMyParams)lParam;
::SetEvent(pt->hDlgCreatedEvent);
return TRUE;
}
return FALSE;
}

/*------------------------------------------------------------------------*/
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
INITCOMMONCONTROLSEX initcontrols;
initcontrols.dwSize = sizeof(INITCOMMONCONTROLSEX);
initcontrols.dwICC = ICC_PROGRESS_CLASS;
::InitCommonControlsEx(&initcontrols);

static MyParams myParam;
int i;

myParam.hInst=hInstance;
myParam.hDlgCreatedEvent = ::CreateEvent(NULL, FALSE, FALSE, NULL);

_beginthread(Thread1, 0, &myParam);

::WaitForSingleObject(myParam.hDlgCreatedEvent, INFINITE);
::CloseHandle(myParam.hDlgCreatedEvent);
myParam.hDlgCreatedEvent = 0;

SendMessage(myParam.hProgress, PBM_SETRANGE, 0, MAKELPARAM(0, 30));
for(i=0;i<30;i++)
{
SendMessage(myParam.hProgress, PBM_SETPOS, i, 0);
Sleep(100);
}

Sleep(1000);
EndDialog(myParam.hDlg, 0);
return 0;
}

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

error C2106: '=' : left operand must be l-value

Aint14-May-07 17:43

Aint

14-May-07 17:43

hi.

I have this error that pointed to this code:

// Get a pointer to the current document
CVector3DDoc * pDoc = GetDocument();
m_pLead.m_aValue = pDoc->m_aLead; // error occur here in view class

Can I do this? m_aLead is a variable in Doc class while m_pLead is a variable in view class. both m_aLead and m_pLead.m_aValue is an array. I am trying to get the data in the Doc class to view class..Thanks.

Re: error C2106: '=' : left operand must be l-value

bob1697214-May-07 18:14

Re: error C2106: '=' : left operand must be l-value

14-May-07 18:14

What you need to do to copy those depends on what kind of arrays you have. If they are of type CArray or similar, there is a member function CArray::Copy to achieve this. Others require you go through and copy each element in the array to a corresponding index on the destination array.

However, if it's an array of pointers, you want to think this through carefully and understand who points to what an who is reponsible for resource cleanup so you don't dangle pointers later on.

In a nutshell, the assignment operator = is usually not used to copy arrays.

Arman S.14-May-07 20:08

Re: error C2106: '=' : left operand must be l-value

14-May-07 20:08

In a nutshell, the assignment operator = is usually not used to copy arrays.

Why do you think so? operator = is usual and natural for a concrete entity as far as the term 'assignment' itself is natural. An array may be assigned to another one which I think is natural [I'm not speaking about the correct ways of doing that]. For instance, std::vector has the = operator overloaded which, I'm pretty sure, is used extensivelly.

--
=====
Arman

bob1697215-May-07 2:13

Re: error C2106: '=' : left operand must be l-value

15-May-07 2:13

Good point. I don't use STL so I wasn't aware of that.

Would it be safe to say the assignment operator is not usually used to copy arrays unless your using STL and a vector?

John R. Shaw14-May-07 19:10

John R. Shaw

14-May-07 19:10

If it is a normal language array such as char lead[10], then the compiler does not generate the code to copy for you. If you where expecting dynamic copy and or creation, then you need to use a container class like vector for that.

char a1[10] = {/*something*/};
char a2[10];

memcpy(a2,a1,10); // copy 10 bytes from a1 to a2

Or with vector

std::vector<char> b1;
std::vector<char> b2;
/* assign something to b1
** ....
*/

b2 = b1; // allocates memory (if needed) and copies b1 to b2

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

Event Handler -Please help me

prathuraj14-May-07 17:08

14-May-07 17:08

I have created a IP address control dynamically.

How to add a event handler for those controls.

How to use event handlers with dynamically created control.

Arman S.14-May-07 19:30

14-May-07 19:30

Generally, three things to be done;

*) decide which exact command to handle
*) prepare the handler function [whose prtototype is influenced by the cammand to be handled]
*) map the command to the handler

As for ip control, I guess you are trying to handle the IPN_FIELDCHANGED notifycation. So you would have a handler like this;

void CMyDialog::OnFieldChangedIpAddress(NMHDR *pNMHDR, LRESULT *pResult)
{
    LPNMIPADDRESS pIPAddr = reinterpret_cast<LPNMIPADDRESS>(pNMHDR);
    // your code here ...
    *pResult = 0;
}

And map it to the notifycation inside BEGIN_MESSAGE_MAP/END_MESSAGE_MAP pair like so;

ON_NOTIFY(IPN_FIELDCHANGED, IDC_MYIPADDRESS, OnFieldChangedIpAddress)

--
=====
Arman

prathuraj14-May-07 19:43

14-May-07 19:43

ON_NOTIFY(IPN_FIELDCHANGED, IDC_MYIPADDRESS, OnFieldChangedIpAddress)

I cant use the control id directly because i created control dynamically.

How to add On_notify for dynamically created one

Arman S.14-May-07 19:51

14-May-07 19:51

You can and hou have to. The last parameter of CIPAddressCtrl::Create takes the id of the newly creating control. So define an id inside resource.h file and pass it to the Create method.

PS. To define an id, go to menu option Edit\Resource Synbols... and then choose New... .

--
=====
Arman

prathuraj14-May-07 22:32

14-May-07 22:32

how to use this id to call notify event

Arman S.14-May-07 22:40

14-May-07 22:40

You should not bother about calling notify events. This is done by the system. So your job is to handle the notifyfication only. See my first post; it describes what you need to do.

--
=====
Arman

Hamid_RT14-May-07 20:55

14-May-07 20:55

prathuraj wrote:
I cant use the control id

How do you make IP address control ? CIPAddressCtrl::Create(....,UINT nID); or CIPAddressCtrl::CreateEx(...,UINT nID);

WhiteSky

prathuraj14-May-07 23:33

14-May-07 23:33

CIPAddressCtrl* pIPAdd = new CIPAddressCtrl;

pIPAdd->Create(WS_CHILD|WS_VISIBLE|WS_TABSTOP|WS_BORDER|ES_AUTOHSCROLL,
CRect(x,y,x+sz.cx,y+sz.cy),this,nID);

Hamid_RT15-May-07 1:00

15-May-07 1:00

You used of nID whats problem?

WhiteSky

prathuraj15-May-07 1:23

15-May-07 1:23

how to call on_notify for OnFieldchangedIpaddress1 using this id

Hamid_RT15-May-07 2:05

what to include to use XMLReader?

15-May-07 2:05

Did you try with Arman Z. Sahakyan's answer anyway see this[^] thread.

WhiteSky

nathan714-May-07 16:41

nathan7

14-May-07 16:41

hi, what files should be included?

thanks!

Nathan

nathan714-May-07 16:48

nathan7

14-May-07 16:48

in Visual Studio using unmanaged C++

bob1697214-May-07 17:21

14-May-07 17:21

What is XMLReader? Are you in search of an XMLReader or is that a specific class you've got picked out and want to use?

MSXML is reasonable if your still looking for a parser to use.

Hamid_RT14-May-07 20:58

14-May-07 20:58

Can you more explain,please? see this article is helpful for you
See XMLReader - Simple reusable class (DOM implementation) for reading xml data. [^]

WhiteSky

Sam_c15-May-07 3:37

Sam_c

15-May-07 3:37

I'm guessing your after the unmanaged C++ version of the .Net XmlReader Class

you might find these of interest,

Microsoft's new XMLLite for C++[^] I havent used this or even taken a proper look but you might find it of interest.

This is an interesting looking project here on CP
FlexibleParser by Michael Chourdakis[^] from the looks of it its his own parser for XML and is platform independent.

Otherwise
MSXML6 Download[^]

cant really say what to include as there are a number of options open for you.
MSXML is nice and easy supports XPath so is very quick, its the one i go for.
documentation has samples in etc.
hope that helps Smile | :)

CScrollBar SB_LINEDOWN

bob1697214-May-07 12:23