function that doesn't care about the type in the paramater?? - C / C++ / MFC Discussion Boards

Re: How to make a function that you can pass any type of array to??

John M. Drescher30-Jul-03 11:53

John M. Drescher

30-Jul-03 11:53

[EDIT]
Sorry did not read all the posts, but this problem screams for a template approach...
[/EDIT]

template<class T>myFunction(T* data)
{
// do stuff
}


int main()
{
  char tmp[100];
  float fTmp[1000];
  myFunction<char>(tmp);
  myFunction<float>(fTmp);
}

John

ShellExecute and highlighting

heju30-Jul-03 9:57

heju

30-Jul-03 9:57

Hi,

I use the function ShellExecute to open a PDF-file from my c++-programm (ActiveXControl). I want to highlight one word on the pdf-file. Can I do this with ShellExecute or have you another idea how I can realize that.

Julia

CMainFrame

act_x30-Jul-03 9:35

act_x

30-Jul-03 9:35

In my SDI application , I have a ToolBar with 10 buttons .

I am unable to Change the text displayed in this Button .

I named the button ID_NEWBUTTON and have a event handler in CMainFrame.

I tried to change the text in the Toolbar button using
m_wndToolBar.SetButtonText(m_wndToolBar.CommandToIndex(ID_NEWBUTTON),"Please change text");
Still nothing seems to be happenning ?

ToolBar

Anonymous30-Jul-03 8:36

Anonymous

30-Jul-03 8:36

How can I programatically change the Color of a ToolBar ?

Re: ToolBar

Frank K31-Jul-03 0:50

Frank K

31-Jul-03 0:50

Hi,

try this

<br />
SetClassLong(m_wndToolBar.m_hWnd, GCL_HBRBACKGROUND, (LONG)::GetStockObject(WHITE_BRUSH));<br />

Regards

Dialog events when in a View

Anonymous30-Jul-03 8:31

Anonymous

30-Jul-03 8:31

I have an SDI framework where my Chidlview creates many Dialogs within itself .

I want to trap a keyboard entry in one of the dialogs . For this I went to ClassView and added the event Handler with a dummy AfxMessageBox

This event is not getting fired ? Suggestions are needed .

Re: Dialog events when in a View

Bob Stanneveld30-Jul-03 9:19

Bob Stanneveld

30-Jul-03 9:19

Hello,

Where did you add the event handler? The OnChar() handler should be added to the dialog in which you want to trap a keyboard entry!

hope this helps a bit...

A student knows little about a lot.
A professor knows a lot about little.
I know everything about nothing.

function that doesn't care about the type in the paramater??

johnstonsk30-Jul-03 8:23

johnstonsk

30-Jul-03 8:23

Sorry the subject was hard to summerize.

I have created a function that I thought was type independent, meaning that it didn't matter what type of an array was passed to the function. It would just write the data with a comma seperation.

I have 2 structure in a class called RFMAccess:

struct TSimHeader
    {
	char   Name[47][21];
	char   Unit[47][21];
	double Min[47];
	double Max[47];
	int SignalCount;
	int SimStatus;

    }static TSimHeader_arr[10];


    struct TSimSignal
    {
       	double Value[47];
	double TimeStamp;

    }static TSimSignal_arr[10];

The data in these structures gets updated 2x a second.
I also want to write the data to a file 2x a second so, I created a function that I thought would do this without having to declare the array type. I want to be able to use this later in other projects.

Here is my function.
I am doing something incorrect here, but just not sure what it is.

ofstream fout ("test.txt");
bool firstTime = true;
int passes = 1;




void LogData::writeData(void *data){	
    int count;
    if(firstTime){
        fout<<"flight_data,";
        for(int i=0; i<RFMAccess::TSimHeader_arr[0].SignalCount; i++){
           if(i == 0){
            fout<<data[i]<<endl;
            passes++;
            if(passes == 2)
                writeData(RFMAccess::TSimHeader_arr[0].Unit);
            else if(passes == 3)
                writeData(RFMAccess::TSimHeader_arr[0].Min);
            else if(passes == 4)
                writeData(RFMAccess::TSimHeader_arr[0].Max);
            else if(passes == 5){
                firstTime = false;
                writeData(RFMAccess::TSimSignal_arr[0].Value);
            }
        }
        else
            fout<<data[i]<<",";
        }
    }
    if(!firstTime &&(flight_data->log  == true)){
         if(i == 0){
            fout<<data[i]<<endl;
            writeData(RFMAccess::TSimSignal_arr[0].Value);
         }
         else
            fout<<data[i]<<",";
    }
}

Thnaks for the help,
Steven

Re: function that doesn't care about the type in the paramater??

Brian Delahunty30-Jul-03 9:37

Brian Delahunty

30-Jul-03 9:37

What is the actual problem your getting?

Regards,
Brian Dela Smile | :)

Re: function that doesn't care about the type in the paramater??

johnstonsk30-Jul-03 9:46

johnstonsk

30-Jul-03 9:46

It's saying that the type of void is unknown or zero.

thanks
steven

CDialogBar ?????

Shay Harel30-Jul-03 8:03

Shay Harel

30-Jul-03 8:03

Anyone have a link to a good resource explaining how to use CDialogBar ?

Unwanted color change when Edit box is ReadOnly

Aidman30-Jul-03 7:07

Aidman

30-Jul-03 7:07

Hi, all

I am experiencing a problem, when I change an edit box into readonly/lock state the backgroundcolor of control changes into the buttonface system color. How can I prevent this or choose a different color?

Thanks in advance

Aidman » over and out
We haven't inherited Earth from our parents, instead we have borrowed her from our children; an old Indian saying.

Re: Unwanted color change when Edit box is ReadOnly

l a u r e n30-Jul-03 7:20

l a u r e n

30-Jul-03 7:20

u have to trap the OnCtlColor() event but as i recall edit boxes dont play nice and repaint themselves in a few places so it can be a bit of a b*itch

"penguins have no bill"
biz stuff about me

Re: Unwanted color change when Edit box is ReadOnly

Renjith Ramachandran30-Jul-03 8:13

Renjith Ramachandran

30-Jul-03 8:13

return a White Brush in OnCtlColor()

Re: Unwanted color change when Edit box is ReadOnly

Aidman30-Jul-03 8:20

Aidman

30-Jul-03 8:20

Ok, Thanks mates Smile | :)

I will try that out

Aidman » over and out
We haven't inherited Earth from our parents, instead we have borrowed her from our children; an old Indian saying.

Re: Unwanted color change when Edit box is ReadOnly

John M. Drescher30-Jul-03 15:06

John M. Drescher

30-Jul-03 15:06

This is the default windows behavior. Unless it is absolutly necissary I would not change it because it will confuse your users who will expect to be able to edit the box.

John

Child dialogs in Win32

bluecombtiller30-Jul-03 7:06

bluecombtiller

30-Jul-03 7:06

Hey! I'm trying to get a child dialog to show up in a pure Win32 app.

What I want to do is use the dialog as half of the UI and use a simple ListBox (created with CreateWindowEx) as the other half.

Here's what I'm trying:
hCtrls = CreateDialog( hInst, (LPCTSTR)IDD_GAMEINFO, hWnd, (DLGPROC)DlgGameInfo );

The line of code works for all non-child dialogs (like my About and Options dialogs), however as soon as I specify in the resource editor that my IDD_GAMEINFO should be a child it doesn't work.

Any help is appreciated! Thanks
./[tiller]

Re: Child dialogs in Win32

l a u r e n30-Jul-03 7:21

l a u r e n

30-Jul-03 7:21

whats the hWnd ur passing?

"penguins have no bill"
biz stuff about me

Re: Child dialogs in Win32

bluecombtiller31-Jul-03 7:10

bluecombtiller

31-Jul-03 7:10

The hWnd is the HWND variable that the main window's WndProc message handler recieves.

In the switch statement for the various windows messages I basically have the following to create my UI:

case WM_CREATE:

HWND hCtrls;
// Listbox works
hCtrls = CreateWindowEx( WS_EX_CLIENTEDGE, "LISTBOX", "",
WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL,
5, 5, 200, 340, hWnd, (HMENU)IDC_GAMELISTBOX,
GetModuleHandle(NULL), NULL);

// Static frame works
hCtrls = CreateWindowEx( WS_EX_CLIENTEDGE, "STATIC", "",
WS_CHILD | ~WS_VISIBLE | SS_GRAYFRAME,
210, 5, 250, 340, hWnd, (HMENU)IDC_GAMEINFOFRAME,
GetModuleHandle(NULL), NULL);

// CreateDialog returns a NULL (IDD_GAMEINFO is my dialog resource)
hCtrls = CreateDialog( hInst, (LPCTSTR)IDD_GAMEINFO, hWnd,
(DLGPROC)DlgGameInfo );

// I also added this later to try it...but it didn't help:
ShowWindow( hCtrls, SW_SHOWNORMAL );
UpdateWindow( hCtrls );

I experimented a bit...the code with no modification works if I specify in the resource editor that the dialog is a regular popup with a border, etc. But of course then it's a popup...and I want it a part of the actually window. (Like a common control would be)
Thanks,
./[tiller]

Re: Child dialogs in Win32

andyj1151-Aug-03 4:30

andyj115

1-Aug-03 4:30

Not sure that this is your case, but for child dialogs you have to ensure that the WS_VISIBLE style attribute is set in the resource.

Cool | :cool:

Re: Child dialogs in Win32

bluecombtiller1-Aug-03 9:13

bluecombtiller

1-Aug-03 9:13

Yeah...I have WS_VISIBLE selected.
./[tiller]

Dynamic array initialization.

⁷³Zeppelin30-Jul-03 6:37

⁷³Zeppelin

30-Jul-03 6:37

I have a member variable of a class declared as a pointer to type double, m_dHessianMatrix. This variable will be holding a 2 x 2 matrix (could be larger)and needs to be initialized completely to zeroes to start. As such, I need something to init the matrix to zero quickly (thus a for loop will not do particularly for LARGE matrices).

Currently I am initializing the matrix data in the constructor as follows:

//////////////////////////////////////////////////////
// CROT_Optimizer()
//
// NOTES: Constructs a ROT_Optimizer object
//        to be used as the quasi-Newton 
//        nonlinear optimization engine
//
// ACCEPTS: The number of nodes in the springs
//			network to be optimized
//
// RETURNS:
//
CROT_Optimizer::CROT_Optimizer(UINT MaxNodes)
{
	ASSERT (MaxNodes > 0);

	if (MaxNodes == 0)
		return;

	m_uiNumberOfNodes = MaxNodes;	// we NEED the number of nodes
	m_uiNumberOfSprings = 0;

	// Pointer initializations
	m_ppNodeIndexedSpringArray = NULL;
	m_dHessianMatrix = NULL;

	m_dHessianMatrix = new double[4];  // a 2 x 2 matrix
	memset(m_dHessianMatrix, 0, sizeof(double));

}

However, I don't like this for two reasons.

1.) I have to include string.h to gain access to the memset function ->code bloat Dead | X|

2.) It is not aesthetically pleasing to the eye Cool | :cool:

Is there a way to initialize the matrix without using a for loop and without using memset()?

Re: Dynamic array initialization.

John M. Drescher30-Jul-03 6:39

John M. Drescher

30-Jul-03 6:39

I use ZeroMemory.

John

Re: Dynamic array initialization.

⁷³Zeppelin30-Jul-03 6:49

⁷³Zeppelin

30-Jul-03 6:49

Ah, ok. One question.

If I have a 4 element matrix, is the proper syntax:

ZeroMemory(&m_dHessianMatrix, sizeof(double));
<pre><code>
ZeroMemory(&m_dHessianMatrix, 4*sizeof(double));

?

(Thanks for the suggestion)

Re: Dynamic array initialization.

John M. Drescher30-Jul-03 6:54

John M. Drescher

30-Jul-03 6:54

ZeroMemory(&m_dHessianMatrix, 4*sizeof(double));

John

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