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I would like to add an internet hyperlink to my homepage on the about dialog box of an application. I have seen this in other applications but can't find a code snipplet for it. Thanks for any help.
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Look for the CHyperLink class on this site. I used it for precisely that purpose. Kinda cool.
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WTL, which is included in the Platform SDK, has a CHyperLink class. There is also the Hyperlink class http://codeguru.earthweb.com/controls/hyperlink.shtml created by someone named Chris Maunder. Never heard of him.
I'm sure the code is also here but I couldn't find it. Chris?
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Hi there,
I had previously asked but just to make sure that it doesn't go away into the back pages, how do you force a listctrl to keep focus after you click as oppose to after a return..This is all after performing a label edit.
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Don't know for sure, but have you treid handling LVN_ENDLABELEDIT for the listctrl?
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Hi All!
I have C++ custom control created as descendant from CWnd.
Is there any easy way to make ActiveX and/or DLL from it (best will be to do it automatically like in Delphi, but the only tool that promised that for VC++ is not working  .
I understand how to build ActiveX and/or DLL from the scratch, but I want to have ONE source (to simplify maintanance) as C++ control, and some template/tool/whatever that will translate it to ActiveX or DLL each time I need update.
SY-
Kosta.
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I had this problem a year ago, when I was trying to take a treectrl and listctrl from MDI into ActiveX.
The only way I could find was to build an MFC ActiveX that doesn't inherit
from any main MFC classes.
Then, I would include my header and cpp for the controls in the project and in its OnCreate Event of the ActiveX, create an instance of each item.
i.e.
in the ActiveX header,
CTreeCtrl MyTreeCtrl;
CListCtrl MyListCtrl;
and in OnCreate of the ActiveX:
MyTreeCtrl.Create(.....)
MyListCtrl.Create(.....)
So, it wasn't plug and play but i didn't have to do things from scratch
either.
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But this will only make CTreeCtrl member of this ActiveX, and all methods, properties and events you'll need to put manually, like:
MyActiveX::DoSomething ()
{ MyCppControl.DoSomething();
}
Is that what you mean? If yes, I need something different. I.e.:
// my C++ control h file:
CMyControl : public CWnd
{ int DoSomething();
}
// my C++ control cpp file:
int CMyControl::DoSomething()
{ /* some processing here*/
}
// My ActiveX h file:
CMyActiveXControl : public CMyControl
{ // no redeclarations from CMyControl here
}
And than after compile I will have OCX where all public methods, properties and events will be available to other programs.
I understand, that simple declaration
CMyActiveXControl : public CMyControl
will not be correct, and I'm looking either for utility that will automatically generate code for CMyActiveXControl given code of CMyControl, or some declaration that will not require me to rewrite methods, properties and events in the cpp file for CMyActiveXControl (may be like CMyActiveXControl : public CMyControl, COleControl ???), or something else.
What I'm trying to avoid is maintaining two or three cpp files (for C++, ActiveX and DLL) that have identical code except declarations and, possible, function names (for example, COleControls has OnDraw instead of OnPaint).
Is it possible in MSVC++? (I know that in C++ Builder and Delphi they have tool allowing to do it automatically).
SY-
Kosta.
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Hello,
I'm new to programing and I'm trying to use a ListBox control(report style).. I have read all the atricles in the ListBox areas and they have helped alot.. the problem I'm having is probably simple to resolve but I'm unable to find any info on it(well atleast examples).. I have a simple listbox(report style).. I'm able to populate it just fine.. I have 8 collumns and 3 rows with data in each field.. I need to pull the data from each field and assign each field with its own member variable.. so in the above example, I have created 24 CString type member variables (one for each field).. how do I pull the data/string from each field and assign it to the variable that I want? Can someone provide me with a little code.. I can understand that type of example better.. Thanks in advance.
Rob Jones
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Why must you create variable for each field? To get the text just use the CListCtrl::GetItemText function.
To retrieve the text from say row 2, column 4
CString strText = GetItemText(1, 3);
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CString str = wndYourList.GetItemText ( nRow, nCol ); And just FYI, you're using a list view control; a list box is the old Win 3.1 control.
--Mike--
http://home.inreach.com/mdunn/
You are the weakest link, GOODBYE!
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Thanks for all your help!!!
Rob
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Hi,
I've written a very simple custom static control that allows you certain control over formatting via HTML type tags (bold, italic and underlined).
I've got it working, but when you drag a window over the control and it gets repainted, the memory usage for the program goes up collosally, which is obviously a memory leak.
I've traced the problem to creating the fonts, via CFont, but despite DeleteObjects and just plain deletes of the CFont object/pointer, the memory leak is still there.
I'm creating a font every time the WM_PAINT message is called using the CreateFont() function. I've tried saving the old font then restoring the old font at the end but this doesn't help either.
Is anyone who knows what they're doing with GDI willing to have a look through the code (180 lines .cpp and .h) if I email it to them, as I really haven't a clue what's wrong.
Many thanks,
Peter
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This is a classic. You're trying to call DeleteObject on a GDI object selected into device context. If you're dealing with font, save the CFont pointer returned SelectObject, and select it back before calling DeleteObject:
CFont f;
f.CreateFont(...);
CFont *pOldFont = dc.SelectObject(&font);
dc.SelectObject(pOldFont);
Tomasz Sowinski -- http://www.shooltz.com
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Thanks for the tips but it didn't help.
I've posted the full OnPaint code under the original thread so maybe that will help?
Cheers,
Peter
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I've just realized that you're already restoring the old font. Sorry for first response - email the code to shooltz@shooltz.com - I'll have a look.
Tomasz Sowinski -- http://www.shooltz.com
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void CCustStatic::OnPaint()
{
CPaintDC dc(this);
CString strText;
GetWindowText(strText);
CRect rect;
GetClientRect(rect);
rect.DeflateRect(CSize(1, 1));
dc.FillSolidRect(rect, m_Colour);
int nMode = dc.SetBkMode(TRANSPARENT);
if (m_bSimple == TRUE)
{
CFont font;
font.CreateFont(-MulDiv(m_nSize, GetDeviceCaps(CreateCompatibleDC(NULL), LOGPIXELSY), 72),0,0,0,m_nWeight,0,0,0,ANSI_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH|FF_DONTCARE, "Arial");
CFont *oldfont = dc.SelectObject(&font);
if (m_bCentred == TRUE)
{
CSize Extent = dc.GetTextExtent(strText);
CPoint pt(rect.CenterPoint().x - Extent.cx/2,
rect.CenterPoint().y - Extent.cy/2);
if (!strText.IsEmpty())
{
dc.TextOut(pt.x, pt.y, strText);
}
}
else
{
CRect rect2 = rect;
rect2.DeflateRect(CSize(2,2));
dc.DrawText(strText, strText.GetLength(), rect2, DT_LEFT | DT_WORDBREAK | DT_NOPREFIX);
}
dc.SelectObject(oldfont);
}
else
{
int nX, nY = 0;
if (m_bCentred == TRUE)
{
CString strTextTemp = "";
for (int j = 0; j < strText.GetLength(); j++)
{
if (strText[j] == '<')
{
if (strText[j + 1] == '/')
{
j ++;
}
j ++;
j ++;
j ++;
}
else
{
strTextTemp += strText[j];
}
}
CFont font;
font.CreateFont(-MulDiv(m_nSize, GetDeviceCaps(CreateCompatibleDC(NULL), LOGPIXELSY), 72),0,0,0,m_nWeight,0,0,0,ANSI_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH|FF_DONTCARE, "Arial");
CFont *oldfont = dc.SelectObject(&font);
CSize Extent = dc.GetTextExtent(strTextTemp);
nX = rect.CenterPoint().x - Extent.cx/2;
nY = rect.CenterPoint().y - Extent.cy/2;
dc.SelectObject(oldfont);
}
else
{
nX = rect.left;
nY = rect.top;
}
BOOL bInsideTag = FALSE;
BOOL bBold = FALSE;
BOOL bItalic = FALSE;
BOOL bUnderLined = FALSE;
BOOL bEndTag = FALSE;
for (int i = 0; i < strText.GetLength(); i++)
{
if (!bInsideTag)
{
if (strText[i] == '<')
{
bInsideTag = TRUE;
continue;
}
CFont font;
if (bBold == TRUE)
{
font.CreateFont(-MulDiv(m_nSize, GetDeviceCaps(CreateCompatibleDC(NULL), LOGPIXELSY), 72), 0, 0, 0, m_nWeight + 200, bItalic, bUnderLined, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH|FF_DONTCARE, "Arial");
}
else
{
font.CreateFont(-MulDiv(m_nSize, GetDeviceCaps(CreateCompatibleDC(NULL), LOGPIXELSY), 72), 0, 0, 0, m_nWeight, bItalic, bUnderLined, 0, ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH|FF_DONTCARE, "Arial");
}
CFont *oldfont = dc.SelectObject(&font);
CString strChar = strText[i];
CSize sSize = dc.GetTextExtent(strChar);
dc.TextOut(nX, nY, strChar);
nX += sSize.cx;
dc.SelectObject(oldfont);
}
else
{
if (strText[i] == 'b')
{
if (strText[i - 1] == '/')
{
bBold = FALSE;
}
else
{
bBold = TRUE;
}
continue;
}
else if (strText[i] == 'i')
{
if (strText[i - 1] == '/')
{
bItalic = FALSE;
}
else
{
bItalic = TRUE;
}
continue;
}
else if (strText[i] == 'u')
{
if (strText[i - 1] == '/')
{
bUnderLined = FALSE;
}
else
{
bUnderLined = TRUE;
}
continue;
}
else if (strText[i] == '>')
{
bInsideTag = FALSE;
continue;
}
}
}
}
dc.SetBkMode(nMode);
}
m_nSize, m_nWeight and m_Colour are all member variables of the control.
Thanks,
Peter
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GetDeviceCaps(CreateCompatibleDC(NULL), LOGPIXELSY)
You're creating and leaking two DCs in each OnPaint. Use dc.GetDeviceCaps instead.
Tomasz Sowinski -- http://www.shooltz.com
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Thanks for that!
I'd never have found that.
Cheers,
Peter
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Hi,
I am trying to find the difference between 2 CTime objects so that I'll know the difference in number of days. But it doesn't seem to work right. Attached is my code. nDays is returning a large negative number while I thought it should return the no. of days difference between the two CTime objects. Any suggestions/ideas/comments would be greatly appreciated.
CTime fileCreatedTime;
....
....
//Find the file's creation time
inputFinder.GetCreationTime(fileCreatedTime);
CTime currentTime = CTime::GetCurrentTime();
CTimeSpan timeDifference = currentTime - fileCreatedTime;
long nDays = timeDifference.GetDays();
Thanks,
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I'd suspect fileCreatedTime variable - here's the excerpt from CFileFind::GetCreationTime docs:
Note Not all file systems use the same semantics to implement the time stamp returned by this function
Check what's returned from CFileFind::GetCreationTime - is it TRUE?
Tomasz Sowinski -- http://www.shooltz.com
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Yes, I am checking for what it is returning. But I believe I found the problem. I was off by 2 minutes from the when it was created yesterday versus when I ran it today. So, it considered the nDays to be 0 since it did not match up to the exact minute/seconds.
Thanks a lot for your help.
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Hi,
I am using CHTMLview as a convenient activeX document container for a Word document.
The problem is i would like
Does anyone know if this is possible? Or any good resource for creating my own activeX document container
I know GetHTMLDocument returns a IUnknown.
Cheers
Richard
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