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Hi!
I have a MFC application that handle idle processing by overloading CWinApp::OnIdle ; for menus and dialogs, I handle the WM_ENTERIDLE in my MainFrame. But I use ShowHTMLDialog API to display HTML page, and then, I don't receive EnterIdle any more. Why ?
Thanks for any help
Regards
Emmanuel Derriey
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i am not sure if WM_ENTERIDLE is a standard message.
if yes, u can get if from PreTranslateMessage function.
if not (it's a fuction call actually), microsoft never offers it for the class.
includeh10
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ShowHTMLDialog shows a modal dialog box, so by definition you can't expect your app to continue to go into idle from time to time.
There's a work around for that, you have to create a separate thread, and call ShowHTMLDialog in that thread.
Back to real work : D-22.
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Why does some write:
typedef struct {
foo bar;
} MyStruct;
whilst I write
struct MyStruct {
foo bar;
};
I know that it's possible to declare LPMyStruct in the first example.
And why the _TAGMYSTRUCT in some cases?
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I think the fomer syntax is C-code (as opposed to C++), meant to trick some C-compilers into doing what you want.
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it is all for C.
typedef struct ABC
{
foo bar;
} MyStruct;
i.e.
MyFunction(MyStruct ms); //C needs struct as description
similar to:
MyFunction(struct ABC ms);
it can be used by both C and C++.
includeh10
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That was what I meant: You can use all of these forms in both C and C++, but you only NEED them in C.
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I want to change CString data to CString data(in Hex format) and change back from CString data (in Hex format)
to CString data. So I write this below code
<br />
CString m_str = "chop][:" ;<br />
CString ivstr;<br />
StrToHexStr(m_str, ivstr); <br />
StrToHexStr function change CString data to CString data(in Hex format)which have these below detail.
<br />
void StrToHexStr(CString& strData, CString& hexstrData)<br />
{ <br />
int j;<br />
CString strtemp;<br />
<br />
hexstrData.Empty();<br />
for (j=0;j<strData.GetLength();j++){<br />
strtemp.Format("%02X",strData.GetAt(j));<br />
hexstrData+=strtemp;<br />
}<br />
}<br />
I get ivstr = "63686F705D5B3A" (from m_str = "chop][:")
Then I write program to change back from CString data (in Hex format)to CString data.
<br />
ivstr = "63686F705D5B3A"; <br />
HexStrToStr(ivstr, m_str);<br />
HexStrToStr function change CString data (in Hex format)to CString data which have these below detail.
<br />
void HexStrToStr(CString& hexstrData, CString& strData)<br />
{ <br />
int j, strlen;<br />
CString c1, c2;<br />
int temp;<br />
unsigned char ctemp;<br />
<br />
strData.Empty();<br />
<br />
for (j=0;j<hexstrData.GetLength();j+=2)<br />
{<br />
c1= hexstrData.GetAt(j);<br />
if ((c1 == 'A')||(c1 == 'B')||(c1 == 'C')||(c1 == 'D')||(c1 == 'E')||(c1 == 'F'))<br />
{<br />
ctemp = c1[0];<br />
temp = (ctemp-55)*16;<br />
}<br />
else<br />
{<br />
temp = atoi(c1)*16;<br />
}<br />
c2= hexstrData.GetAt(j+1);<br />
if ((c2 == 'A')||(c2 == 'B')||(c2 == 'C')||(c2 == 'D')||(c2 == 'E')||(c2 == 'F'))<br />
{<br />
ctemp = c2[0];<br />
temp = (ctemp-55);<br />
}<br />
else<br />
{<br />
temp += atoi(c2);<br />
}<br />
strData += temp;<br />
}<br />
}<br />
But I do not get m_str = "chop][:"
m_str is the other string
Do you know how to solve my problem?
Thank you for your reply.
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When reversing the process, take each two Hex chars, convert them to a long (strtol base 16 ) then format it into a char, then concatenate into a string
Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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How can I get the coordinates of a window, relative to it's parent?
And how can I create sticky buttons on a toolbar? (Staying up/down when clicked)
Using MFC
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Not sure about the coords part, but sticky buttons work exactly the same way as checkable menu items do
--
Help me! I'm turning into a grapefruit!
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benjymous wrote:
Not sure about the coords part, but sticky buttons work exactly the same way as checkable menu items do
And that would be... how :p
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Its relatively simple:
CRect GetCoordsRelativeToParent (CWnd *pCoordsOf)<br />
{<br />
CWnd *pParent = NULL;<br />
ASSERT(pCoordsOf);<br />
if (pCoordsOf != NULL)
pParent = pCoordsOf->GetParent ();<br />
<br />
CRect rcCoords;<br />
pCoordsOf->GetWindowRect (&rc);<br />
pParent->ScreenToClient (&rc);<br />
<br />
return rc;<br />
}<code><br />
<br />
I'm going of memory, so the syntax of the commands may be a little wrong, but you hopefully the idea!<br />
<br />
Iain.
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Thanks a lot 
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Locked Ghost wrote:
And how can I create sticky buttons on a toolbar? (Staying up/down when clicked)
// where i is the button index (1,2,3,4,5,6 etc...)
m_wndToolBar.SetButtonStyle(i, TBSTYLE_CHECK);
Locked Ghost wrote:
How can I get the coordinates of a window, relative to it's parent?
CPoint point;
ClientToScreen(&point);
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I forgot you need to handle the ON_UPDATE_COMMAND_UI ... and do a SetCheck either TRUE or FALSE to set the button down and up..
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How can I catch an event in my application when user changes/changed language
(for instance, from En to Fr or De) in system tray area or with ALT+SHIFT?
Thanks
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- INTRODUCTION:
I have created a derived CListCtrl class.
That class have a CEdit and a CComboBox var.
I try to instantiate them using their Create function but the this pointer is still null in the constructor of the ListCtrl.
- QUESTIONS:
When do the ListCtrl this pointer won't be null?
Which message must I handle in order to be able to use the Create functions? I mean that as in a dialog there's the OnInitDialog function, could it be possible to have something similar in a control?
- CODE:
the header file:
<br />
CEdit m_cedParametritzacio;<br />
the constructor in the cpp file:
<br />
CRect rInicialitzacio;<br />
<br />
rInicialitzacio.left = 0;<br />
rInicialitzacio.top = 0;<br />
rInicialitzacio.right = 20;<br />
rInicialitzacio.bottom = 20;<br />
<br />
int iR = this->m_cedParametritzacio.Create(ES_AUTOHSCROLL, rInicialitzacio, this, IDC_ED_PARAMETRITZACIO_LCTRL);<br />
Due to the fact that this is still NULL the function fails.
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"this" pointer is not null at any place (from constructor to destructor).
ur problem is the (parent) window has not been created in constrctor.
WM_CREATE is right point to create child window - but, some MFC classes filter the message - check if the message is really past to ur code if has trouble.
includeh10
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the wm_create is not passed...
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Ok, here's the situation: I've created a new MDI app (with Appwizard) to which I've added four CFormView's. I've registered to Document Templates ok and can open new views without any problem.
The thing is these views are to operate sequentially (there is only one document) - i.e. the user will complete all the nessecary bits on one form, then click a button whoch will open a different form and close the current one.
The new view opens OK, but i'm having difficulty closing the first one without getting various nasty access violations etc. I gather from MSDN that DestroyWindow is the thing I should be calling, but that I should be calling this for both the view and frame - is this right? If so I cannot get it to work at all (shuts down ok but I then get all sorts of access violations which seem to be caused by some bit or other being left in memory).
Any body know how to do this? It strikes me as something pretty elementary but I just can't get a grip on it. Help!
All I want to do is close the view totally.
Alex.
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I also need help on how to restart a program from within itself...
Basically I have a need to reload my program from scratch if a user changes some options. I'm not sure how to accomplish that, so any suggestions or hints would be really helpful!
Thanks in advance,
Dennis
MCP, MCSD
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Can't you just make it ShellExecute it's own exe (passing down any command line options if appropriate) and then quit the original?
--
Help me! I'm turning into a grapefruit!
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Strangely enough, it works!
I just didn't think of that option because I am limiting my application to one instance only in InitInstance and I thought that the thread wouldn't be destroyed as fast as it does and it would block the launch of a new one. But it doesn't. Thanks.
MCP, MCSD
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Hmm, in that case it's worth testing rigourously (especially on slower machines) as it may end up failing some of the time.
Another solution would just to be to run a secondary application (or batch file) that's job is to just pause until the main app is quit, and then relaunch it
--
Help me! I'm turning into a grapefruit!
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