C / C++ / MFC

5-Jun-02 9:36

Overriding the paint handler in your dialog and using DrawIconEx will do the trick.

Dov Sherman wrote:
How do I tell VC that I want to display the icon at it's actual size?

Shout at it really loud. Use harsh language. Tell it that Microsoft Sucks™. Then try DrawIconEx. Smile | :)

Re: Icons in Dialogs

Ed Gadziemski5-Jun-02 12:33

Ed Gadziemski

5-Jun-02 12:33

Set the style to "real size image" in the resource editor or programmatically.

Mutex problem

Hans Ruck5-Jun-02 8:14

Hans Ruck

5-Jun-02 8:14

In a dialog-based MFC, i've created a mutex as a result of pressing of a button, this way:

m_hMutex=CreateMutex(NULL, FALSE, "unique name");

Later, i call:

WaitForSingleObject(m_hMutex, INFINITE);

waiting for a worker to release the mutex.
The behaviour of the stuff is very strange: the worker doesn't release the mutex, but the main-one passes the WaitForSingleObject call and returns WAIT_OBJECT_0 immediately.

If you know how could it be fixed, please kick a click to some reply.

rechi

Mike Nordell5-Jun-02 9:40

5-Jun-02 9:40

Has the worker really acquired the mutex before you try to wait?

Also, if this is the only way you are using it perhaps an event is a better choice than a mutex?

Hans Ruck5-Jun-02 21:07

Hans Ruck

5-Jun-02 21:07

I pass the mutex' handle by the PVOID of the worker, while the mutex is constructed with FALSE on bInitialOwner.
It has to behave like a theoretical binary semaphore.

rechi

Mike Nordell6-Jun-02 9:57

6-Jun-02 9:57

Then, how do you know that the started thread has indeed started and acquired the mutex?

Perhaps an event is a better choice in this case. If you create an event in the non-signalled state, hand it over to the thread you're creating and then WaitFor... until the other thread signals the event object (SetEvent).

John M. Drescher6-Jun-02 10:06

John M. Drescher

6-Jun-02 10:06

If you name the Mutex or Event the same in both threads there is no need to pass a handle to the other thread. Remember make the name unique in the system use a GUID for example. Then Create the mutex in the main thread and open it in worker threads.

John

string to wstring conversion

John M. Drescher6-Jun-02 10:11

John M. Drescher

6-Jun-02 10:11

Are you calling WaitForSingleObject(m_hMutex, INFINITE); in the worker. Your call to CreateMutex does not acquire the mutex.

John

5-Jun-02 7:41

I was told that you can perform this conversion using the transforms and widen and narrow functions. But having played with the transform function, I keep getting an error regarding not beign able to find the widen() function. Where is widen() defined?

this is what i do:

wstring wstr;
string str;
transform(str, wstr, widen());

Re: string to wstring conversion

Mike Nordell5-Jun-02 7:57

Error when using EnumObjects function.

5-Jun-02 7:57

Where is widen() defined?

basic_ios

If you for some reason can't read the documentation, you might try the following:
Open an explorer window and navigate down to your MSVC include directory. Press F3. Type "widen(" (without the quotes) in the "Containing text" edit box.

Once you get a sample compiled you can get there even faster by pressing F12 from within the IDE.

VC++ XML integration

5-Jun-02 7:31

I have an XML document that includes a DTD . I need to parse this file using VC++ using the DOM .Where can I find resources for doing this . Please help Smile | :)

Actx

Re: VC++ XML integration

Nemanja Trifunovic5-Jun-02 7:48

Nemanja Trifunovic

5-Jun-02 7:48

http://www.codeproject.com/soap/#XML

I vote pro drink Beer | [beer]

redeemer5-Jun-02 7:16

redeemer

5-Jun-02 7:16

I have a function which takes the IShellFolder object for a folder as a parameter, and loops through all the items in the folder. If it is a file, it adds it to a ListView control, and if it is a folder it calls itself. But the first time the function encounters a folder and calls itself, the pIShell->EnumObjects returns the error code -2147023673 which, according to the Error Lookup, is "The operation was canceled by the user.".

Can anyone figure out what's wrong? Here's the code:

void AddFilesFromFolder(IShellFolder *pIShell)
{
	if (pIShell)
	{
		IShellFolder *pBrowse = NULL;
		LPENUMIDLIST pFolder = NULL;
		LPMALLOC pMalloc = NULL;
		ITEMIDLIST *pNewId = NULL;
		STRRET strDispName;
		LVITEM lvItem;
		DWORD pActual = 0;
		DWORD dwAttrib;
		IShellFolder *CurrentFolder;
		HRESULT err;

		err = SHGetDesktopFolder (&CurrentFolder);

		if (err == NOERROR)
		{
			SHGetMalloc(&pMalloc);
			err = pIShell->EnumObjects(NULL, SHCONTF_FOLDERS | SHCONTF_NONFOLDERS | SHCONTF_INCLUDEHIDDEN, &pFolder);
			if (err == NOERROR)
			{

				lvItem.mask = LVIF_IMAGE | LVIF_TEXT;

				while (pFolder->Next(1, &pNewId, &pActual) != S_FALSE)
				{
					dwAttrib = SFGAO_FOLDER;
					pIShell->GetAttributesOf(1, (LPCITEMIDLIST*)&pNewId, &dwAttrib);
						
					if (!(dwAttrib & SFGAO_FOLDER))
					{
						pIShell->GetDisplayNameOf(pNewId, SHGDN_INFOLDER, &strDispName);

						GetID3();
						FillInfo();
						ListAddItem();
					}

					if (dwAttrib & SFGAO_FOLDER)
					{
						CurrentFolder->BindToObject(pNewId, NULL, IID_IShellFolder, (LPVOID*)&pBrowse);
						Add2(pBrowse);
					}
				}

				pMalloc->Free(pNewId);
				pMalloc->Release();
				gbFileOpen = true;
				pFolder->Release();
			}

			CurrentFolder->Release();
		}
	}
}

Thankyou.

-Rune Svendsen

Re: Error when using EnumObjects function.

Cathy6-Jun-02 9:43

Cathy

6-Jun-02 9:43

Try setting hwndOwner and maybe it will show you a message.

MSDN says "If hwndOwner is set to NULL, the enumerator should not post any messages, and if user input is required, it should silently fail."

Cathy

Life's uncertain, have dessert first!

MSChart labels

5-Jun-02 5:50

Hi I've read the article in Code project about the mschart and how to set data. Now I would like to know how to set the labels.
Can anyone help?
Thanks

Richard Ellis5-Jun-02 20:36

Richard Ellis

5-Jun-02 20:36

G'Day Anon

I may have the answer for you though I'm not 100% sure because I'm yet to get it working myself - but I have run out of time for the moment.

using the example on code project I have added the following code when the GO button is pressed. I have placed it just before the chart is refreshed.

The first bit sets the legend (only did 1 to see if it worked)

CVcPlot Plot = m_Chart.GetPlot();
CVcSeriesCollection SeriesCollection = Plot.GetSeriesCollection();

CVcSeries Series = SeriesCollection.GetItem(1);
Series.SetLegendText(_T("New Text"));

The next bit was to do the labels for each point on the axis. It is incomplete and not quite working but hopefully it will give you an idea and you can let me know how to fix it Smile | :)

I am getting a bad function argument error when calling SetColumnLabel or SetRowLabel - something to do with my indexes I think.

CVcDataGrid DataGrid = m_Chart.GetDataGrid();

short i;
CString strLabel;
short nRows = DataGrid.GetRowLabelCount();
short nColumns = DataGrid.GetColumnLabelCount();

/* for (i=0; i

Ruca20-Aug-02 1:08

Ruca

20-Aug-02 1:08

Hi Richard,
Sorry that I'm only answering now, it's just that I've been busy and only had the time to do this now.

I tried what you suggested and also get the same "bad function argument" error.
So I tried the following:
short index;
for ( i = 1; i < 11; i++ )
{
//strLabel.Format("row %d", i);
// strLabel = "Row Text";
index = i * 2;
// DataGrid.SetColumnLabel(index, 1, "");
strLabel = DataGrid.GetColumnLabel(index, 1);
}

And I get all the correct column names, i.e. R1, R2, R3, ... R10.
It almost seems to be the actual string variable that seems to give the problem???

Still trying. Have you had any success?

Rui

Rui

Ruca20-Aug-02 5:28

Ruca

20-Aug-02 5:28

Hi Richard,
I tried the following:

DataGrid.SetColumnLabel(1, 1, "Column 1");
strLabel = DataGrid.GetColumnLabel(1, 1);
AfxMessageBox(strLabel);

This enables the C1 text in the datagrid to be changed. This seems to be the name of the first set of data.

But I'm still not able to change the Column labels.
Does anyone have a clue how to do it?

Regards

Rui

Ruca20-Aug-02 6:43

Ruca

20-Aug-02 6:43

hi Richard,

The following works:

COleSafeArray saRet;
CString strLabel = "";

DWORD numElements[] = {10, 1}; // 10x10
//DWORD numElements[] = {10};

// Create the safe-array...
saRet.Create(VT_R8, 2, numElements);

// Initialize it with values...

long index[2];

for(index[0] = 0; index[0] < 10; index[0]++)
{
for(index[1] = 0; index[1] < 1; index[1]++)
{
double val = index[0]*10;
saRet.PutElement(index, &val);
}
}

// Return the safe-array encapsulated in a VARIANT...
m_Chart.SetChartData(saRet.Detach());
m_Chart.SetChartType(3);

CVcPlot Plot = m_Chart.GetPlot();
CVcSeriesCollection SeriesCollection = Plot.GetSeriesCollection();

CVcSeries Series = SeriesCollection.GetItem(1);
Series.SetLegendText(_T("New Text"));

CVcDataGrid DataGrid = m_Chart.GetDataGrid();

short i;
short nRows = DataGrid.GetRowLabelCount();
short nColumns = DataGrid.GetColumnLabelCount();

/* for (i=0; i {
strLabel.Format("col %d", i);
DataGrid.SetColumnLabel(i, 1, strLabel);
}
*/

short j;
// DataGrid.SetColumnLabelCount(10);
// count = DataGrid.GetColumnLabelCount();
for ( i = 1; i < 6; i++ )
{
//strLabel.Format("row %d", i);
strLabel = "Row Text";
j = i * 2;
// DataGrid.SetColumnLabel(j, 1, strLabel);
strLabel = DataGrid.GetColumnLabel(j, 1);
//AfxMessageBox(strLabel);
DataGrid.SetRowLabel(i, 1, "Row");
strLabel = DataGrid.GetRowLabel(i, 1);
}

m_Chart.SetShowLegend(TRUE);

m_Chart.Refresh();

Try it.

Thanks for your help

Rui