CtlColor question - C / C++ / MFC Discussion Boards

Re: Animated Vs html based websites

Maximilien16-Mar-09 9:59

Maximilien

16-Mar-09 9:59

What is an animated web site ? a fully flash (or silverlight) site ? or something else ?
Confused | :confused:

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Re: Animated Vs html based websites

llp00na16-Mar-09 10:09

llp00na

16-Mar-09 10:09

An animated website is a flash-based website. All/ Major content is flash.

llp00na

Re: Animated Vs html based websites

Maximilien16-Mar-09 10:10

Maximilien

16-Mar-09 10:10

After parsing the html source, how can you decide that the major content of a page is in flash or not ?

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Re: Animated Vs html based websites

llp00na16-Mar-09 10:11

llp00na

16-Mar-09 10:11

How can you do that?

llp00na

Re: Animated Vs html based websites

bulg16-Mar-09 10:45

bulg

16-Mar-09 10:45

Website is a display. While some people unfortunately use diagonals to measure displays, I prefer width and height attributes. Fortunately, so do <object>s in webpages, usually.

All that's left to do is pick a "total area" number, & compare.

Re: Animated Vs html based websites

llp00na16-Mar-09 11:18

llp00na

16-Mar-09 11:18

Thats good idea which I started to implement now

Thanks

llp00na

Re: Animated Vs html based websites

led mike16-Mar-09 11:40

led mike

16-Mar-09 11:40

llp00na wrote:
Thats good idea

Really, it's a good idea now, it just wasn't a good idea the first two times people gave it to you? What a frakin monkey. Dead | X|

CtlColor question

bulg16-Mar-09 8:41

bulg

16-Mar-09 8:41

Given this...

class CTopDlg : public CDialog {
...

then this works...

HBRUSH CTopDlg::OnCtlColor(CDC*,CWnd*,UINT){
  HBRUSH ret = CDialog::OnCtlColor(...)
  ... 
  return ret
}

but if I try this...

class CDerivedDlg : public CTopDlg {
...

then this does _not_ work...

HBRUSH CDerivedDlg::OnCtlColor(CDC*,CWnd*,UINT) { 
  HBRUSH ret = CTopDlg::OnCtlColor(...) // error: access non-static protected member function
  ...
  return ret
}

OnCtlColor is declared virtual in my CTopDlg class, and is also in a protected: section. It is _not_ virtual and _is_ protected in CDialog. The error is based on the rules of C++, but how did CTopDlg compile?

Re: CtlColor question

bulg16-Mar-09 8:54

bulg

16-Mar-09 8:54

brain fart.. here's why in case you wasted your time with my first post, or you looked this up:

make OnCtlColor not virtual in CTopDlg. Then it isn't overwritten by CDerivedDlg::OnCtlColor, and CTopDlg::OnCtlColor(...) is a valid reference inside the CDerivedDlg version.

Re: CtlColor question

Stuart Dootson16-Mar-09 9:20

Stuart Dootson

16-Mar-09 9:20

CTopDlg::OnCtlColor should be a valid reference within CDerivedDlg even if it is declared virtual. It tells the compiler explicitly to call OnCtlColor as if this had type CTopDlg.

It certainly works in VS2008 and g++4.0.1

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: CtlColor question

Stuart Dootson16-Mar-09 9:17

Stuart Dootson

16-Mar-09 9:17

The message indicates the compiler can't get a CTopDlg object pointer from the CDerivedDlg object pointer you get using this (BTW - what error number are you getting?).

Your scenario, as presented, (OnCtlColor declared virtual and protected in CTopDlg, OnCtlColor declared virtual (or non-virtual) and protected in CDerivedDlg) compiles under VS2008. So...what compiler are you using (VC6? I'm thinking it might get confused easier than VS2008), are you absolutely sure you've derived CDerivedDlg publicly from CTopDlg?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: CtlColor question

bulg16-Mar-09 10:39

bulg

16-Mar-09 10:39

(busted!) Yes, I'm using VC6, since for some reason that's what our partners chose to code in originally.

I thought it was a blessing in disguise, as if CDerivedDlg::OnCtlColor ever got executed, with a valid call to this->OnCtlColor, the program would almost certainly hang, right? (I can't try it on this machine)

Re: CtlColor question

Stuart Dootson16-Mar-09 10:51

Stuart Dootson

16-Mar-09 10:51

bulg wrote:
I thought it was a blessing in disguise, as if CDerivedDlg::OnCtlColor ever got executed, with a valid call to this->OnCtlColor, the program would almost certainly hang, right?

No, it'll do the right thing - when you use a class namespace specifier like that (i.e. something like CTopDlg::OnCtlColor), it determines what method to call statically at compile-time (i.e. the compiler works out what to call) rather than dynamically at run-time (i.e. looking up what to call in the v-table).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Wanted: Eclipse C++ projects

-+- Beth Mackenzie -+-16-Mar-09 7:54

-+- Beth Mackenzie -+-

16-Mar-09 7:54

Hi, I'm looking for large opensource C++/g++ Eclipse projects to test and build in Eclipse, any suggestions?

Preferably where the workspace .cproject has been provided.

(I'm using Windows, did I post this in correct forum?)

Thanks
Beth

Having a bad bug day?

--- Elle A Du Shell --

Re: Wanted: Eclipse C++ projects

Stuart Dootson16-Mar-09 8:50

Stuart Dootson

16-Mar-09 8:50

I don't know of any, but I'd suggest searching Google (both Web and Google Code[^]) for something like "cproject cdt" or "cproject cdt eclipse" - that found a few when I had a look.

Searching SVN repositories for ".cproject" might help as well - an example[^].

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: Wanted: Eclipse C++ projects

-+- Beth Mackenzie -+-16-Mar-09 22:51

-+- Beth Mackenzie -+-

16-Mar-09 22:51

Thanks your help there seem to some sizable projects out there to pick.

Having a bad bug day?

--- Elle A Du Shell --

how to find multiple instances of same top-level class name

FISH78616-Mar-09 6:48

FISH786

16-Mar-09 6:48

Can some please tell me how to find multiple instances of same top-level class name. I have used FindWindow(), however it's only returning the first window it finds.

thanks a million.

Re: how to find multiple instances of same top-level class name

«_Superman_»16-Mar-09 7:12

«_Superman_»

16-Mar-09 7:12

You can enumerate all windows using EnumWindows.
Then use GetClassName on the window handle to get the name of its class.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: how to find multiple instances of same top-level class name

FISH78616-Mar-09 7:19

FISH786

16-Mar-09 7:19

Thank you.

Re: how to find multiple instances of same top-level class name

FISH78617-Mar-09 17:35

FISH786

17-Mar-09 17:35

Superman, I am stuck between using EnumWindows and a hook. I have tried both. Here are my problems with both. I was avoiding to use hook because i am not as provicient yet to use, however if I can get it going with what I have so far, It will save me frustrations in the future. The reason I am avoiding it is I for now is I only need it to get my window captions and window positions of all windows open based on classname. I am way behind in this. If you can help with either I will appreciate it.
Hook Problem.
The Dll compiles fine. Not sure how to test it yet on its own.
User Inteface that goes with the hook compiles fine own its own and runs fine. However when I compile and run it with the header files included for the hook dll. I get a run time execution error. I changed the project to make it as a dependency when compiling. When I do that the user app is looking for a hookdll.lib file which I believe is for the dll's export which I can't find and not sure what options to change, even though I have the __desc(....dllexport) in there. So I am stuck there.
EnumWindows Problem.

I am using trying to use it when the user clicks the command button in the user application.
This is what I have so far and cant compile once i have this in the app.

void CUserAppDlg::OnBnClickedButton1()
{
	::EnumWindows(MyEnumProc, 0);
////Not sure if this is right?
	
	// TODO: Add your control notification handler code here
}
/////////
Not sure How to declare this. Getting compile errors on this too.

I have it in the app's header file in the public section as

BOOL CALLBACK MyEnumProc(HWND hWnd, LPARAM lParam);

the following is in the app's.cpp

BOOL CALLBACK MyEnumProc(HWND hWnd, LPARAM lParam)
{
      char title[500];
      GetWindowText(hWnd, title, sizeof(title)); 
      return true;

}

I sincerely appreciate all the help you have provided me with.

once again thanks a million.

Re: how to find multiple instances of same top-level class name

«_Superman_»17-Mar-09 23:54

«_Superman_»

17-Mar-09 23:54

It looks fine to me.
What is the error that you're getting?

«_Superman_»
I love work. It gives me something to do between weekends.

Re: how to find multiple instances of same top-level class name

FISH78618-Mar-09 2:21

FISH786

18-Mar-09 2:21

Appreciate your help a lot.
When I use EnumWindows.

error C3867: 'CUserAppDlg::MyEnumProc': function call missing argument list; use '&CUserAppDlg::MyEnumProc'

When I use the hook without the dependency compiles and header included.

This is with the hook in the userapp: The application failed to initialize properly (0xc0000005).

Without the hook in the user app and no EnumWindows: the UserApp is fine.

DeBug Question:

When I am debugging my app. The debuger states that no sorce code found when it reaches the above error. Could this error be caused by one of the Header files I am using. e.g. or <regex.hpp> because if it is all I am using are the standard header files nothing fancy.
Thanks a million.

Re: how to find multiple instances of same top-level class name

FISH78618-Mar-09 3:32

FISH786

18-Mar-09 3:32

Well. I might have resolved this doing the following. Not sure where I went wrong with the first one.

I created a new userapp. Without inserting any codes compiled it to make sure it works. Well it worked.

Created a DLL project in the same solution as I had before this time instead of changing and entering anything. Compiled it and set the dependencies.

After setting the dependencies it compiled not asking for any lib files.

I changed the dll code to pop up a message and ran my user app. It worked fine.

So I have a template to work with. So If any errors I get will be my own.

Thanks again for all the help.

CWinThread Question

ForNow16-Mar-09 6:20

ForNow

16-Mar-09 6:20

Hi,

I starting a worker thread using a CwinThread object

In response to User info from a Dialog Box

After the thread a has retrieved the info what is the best way to notify the app/MainFame window

Save the main window object after creating it e.g CMainFrame were is CMainFrame

is the main CFrameWnd object and do a SendMessage to that object

Or save the Main Thread from CWinapp and PostMessage to that thread

Since the thread isn't really part of Dialog Window I guess can't do a CWnd::GetaParent

to get the main Cwnd object ???

I am just a MFC rookie so... any suggestion are welcome

Re: CWinThread Question

«_Superman_»16-Mar-09 7:14

«_Superman_»

16-Mar-09 7:14

MFC has a function called AfxGetMainWnd to get the main window object.

«_Superman_»
I love work. It gives me something to do between weekends.

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