C / C++ / MFC

Richard MacCutchan25-Jan-24 22:21

25-Jan-24 22:21

You need to provide more details about what you are trying to do here. Calling UpdateGame in the message loop as you show, will only work if there are no messages in the queue. And given the way Windows operates, this is not very likely. The only thing you should do in your WM_PAINT handler, is to update the screen. All calculations and measurements should be performed elsewhere.

Calin Negru26-Jan-24 0:41

Calin Negru

26-Jan-24 0:41

Original post edited, I hope it makes sense now

Richard MacCutchan26-Jan-24 0:52

26-Jan-24 0:52

I just ran a quick test and the call to UpdateGame does indeed get called many times in a simple Window. You need to do some more debugging to find out why that does not happen in your code.

CPallini26-Jan-24 1:25

CPallini

26-Jan-24 1:25

Wow, you're a game developer, now! Thumbs Up | :thumbsup:

"In testa che avete, Signor di Ceprano?"
-- Rigoletto

Richard MacCutchan26-Jan-24 1:30

26-Jan-24 1:30

C++

void UpdateGame()
{
    MessageBox(hWnd, "Doing the update", "Game", MB_OK);
}

Help me to decipher the error messages

CPallini26-Jan-24 0:39

CPallini

26-Jan-24 0:39

Quote:
but the execution never reaches UpdateGame()

Are you sure?

Even here: The basic game loop · microsoft/DirectXTK12 Wiki · GitHub[^] such a loop is suggested (look at the bottom of the page).

"In testa che avete, Signor di Ceprano?"
-- Rigoletto

modified 26-Jan-24 7:22am.

Salvatore Terress20-Jan-24 2:46

20-Jan-24 2:46

The second line of code does not compile and I get a ton of "helpful" messages.
I am asking the forum to help me to understand the messages.
I am not asking for RTFM...

If somebody is willing to help I will post the errors.

QAction tempAction;
subMenu[index]->addAction(" test ");
subMenu[index]->addAction(tempAction.setCheckable(true));

Richard MacCutchan20-Jan-24 3:18

20-Jan-24 3:18

Posting such a question without the error message is not very helpful. Please make sure you post all the relevant information.

Dave Kreskowiak20-Jan-24 4:56

Dave Kreskowiak

20-Jan-24 4:56

Don't make a post with a teensy bit of code and no errors, then ask "is someone willing to help?" Because if you don't supply ALL of the information on the problem, the answer is going to be NO. All you're doing is wasting time because now you have to wait for an answer of "Sure!" before you post the rest of the information required to solve the problem, then wait some more for an actual answer.

Asking questions is a skill
CodeProject Forum Guidelines
Google: C# How to debug code
Seriously, go read these articles.
Dave Kreskowiak

Gerry Schmitz20-Jan-24 6:34

Gerry Schmitz

20-Jan-24 6:34

Best guess: you're mixing types; which only works for things "typed as object".

"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I

Richard Andrew x6421-Jan-24 11:33

Richard Andrew x64

21-Jan-24 11:33

Oh, so we need to pass a little test before we're allowed to respond to your post? How childish.

The difficult we do right away...
...the impossible takes slightly longer.

CPallini21-Jan-24 20:33

CPallini

21-Jan-24 20:33

Please help us to answer your post.

"In testa che avete, Signor di Ceprano?"
-- Rigoletto

jschell22-Jan-24 5:24

jschell

22-Jan-24 5:24

As noted not enough information.

And the cause is based on what the exact type (resolved by the compiler) for 'subMenu[index]'

So for example from Qt docs a QWidget addAction() method takes a pointer to a QAction. And in that case a char pointer would not work. (I got that by RTFM by the way.)

Richard MacCutchan22-Jan-24 6:22

22-Jan-24 6:22

jschell wrote:
I got that by RTFM by the way

Me too, but I couldn't be bothered to edit my original reply. This guy really takes the biscuit (cookie).

Loop thru two dimensional array - edited

Gerry Schmitz26-Jan-24 6:13

Gerry Schmitz

26-Jan-24 6:13

I think it's the same cookie under a different name.

Salvatore Terress15-Jan-24 7:41

15-Jan-24 7:41

Minor add:

I think the loop increment is wrong

I have commented out inner loop and addend two more list to the array
so the decimal count should be 5.
OK the code say Array size 4
and it misses the last array.
That should be a snap to fix...

<"TASK #ifdef FUNCTION_TEST_PROJECT int MainWindow_Bluetooth::CreateMenus_Array()79"
" index array 0  Array size 4"
" index array 1  Array size 4"
" index array 2  Array size 4"
" index array 3  Array size 4"/pre>








OK, I have plain C question about nested  "loop" 

My task is to loop thru two dimensional array...
The error in my code is stopping the embedded loop.

Here is a snippet of the run debug messages

here is the "problem " code 

 for (index_main = 0; index_main < list_array[index_array][index_main].size(); ++index_main)
What am I doing wrong in sizing the array?
Many thanks for help resolving this.

Debug


 <pre lang="text">" index array 0Array size 4"
" main menus  0 SubWindow terminal     (QMdiArea )main menu size 34"
" main menus  1 SubWindow hcitool      (QMdiArea )main menu size 34"
" main menus  2 SubWindow bluetoothctl (QMdiArea )main menu size 34"
" main menus  3 SubWindow system       (QMdiArea )main menu size 34"
ASSERT failure in QList<T>::operator[]: "index out of range", file /home/nov25-1/Qt/5.15.2/gcc_64/include/QtCore/qlist.h, line 575
12:23:02: /mnt/A_BT_DEC10/BT__PROGRAMS/A_JAN11/A_BT_LIBRARY/mdi/mdi crashed.

Array;

C++

const QStringList list_array[10]
   {
       { "SubWindow terminal     (QMdiArea )",
           "SubWindow hcitool      (QMdiArea )",
           "SubWindow bluetoothctl (QMdiArea )",
           "SubWindow system       (QMdiArea )" },

       { "SubsubWindow bluetoothctl help        (QMdiArea )",
           "SubsubWindow bluetoothctl list  (QMdiArea )",
           "SubsubWindow bluetoothctl devices (QMdiArea )",
           "SubsubWindow bluetoothctl show  (QMdiArea )" },

       { "SubsubWindow hcitool        (QMdiArea )",
           "SubsubWindow hcitool   dev  (QMdiArea )",
           "SubsubWindow hcitool   scan (QMdiArea )",
           "SubsubWindow hcitool   inq  (QMdiArea )"}
   };

Code:

C++

for (index_array = 0; index_array <  list_array[index_array].size(); ++index_array  )
 {
     text = " index array ";
     text += QString::number(index_array);
     text += "Array size ";
     text += QString::number(list_array[index_array].size() );
     qDebug() << text;

 for (index_main = 0; index_main < list_array[index_array][index_main].size(); ++index_main)
 {
     text = " main menus  ";
     text += QString::number(index_main);
     text += " ";
     text += list_array[index_array][index_main];
     text += "main menu size ";
     text += QString::number(list_array[index_array][index_main].size());
     qDebug() << text;
 }
 }

modified 15-Jan-24 18:16pm.

jeron115-Jan-24 9:31

jeron1

15-Jan-24 9:31

I've never used Qt before but, this line seems odd,

for (index_array = 0; index_array <  list_array[index_array].size(); ++index_array  )

specifically

index_array <  list_array[index_array].size()

Maybe try something like

for (index_array = 0; index_array <  list_array.size(); ++index_array  )

"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
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modified 15-Jan-24 15:38pm.

Salvatore Terress15-Jan-24 9:50

15-Jan-24 9:50

Sorry, no go.

This is not about Qt - I no longer post questions about Qt - this is wrong forum for Qt.

This is plain C question - hence in "C..." sub forum.

In my view each loop has its stopping point.

The first - parent loop - needs to stop when it reaches the end

AND its "size" is correct (see debug message ) and I can run it bypassing the "inner " loop.

The size of inner loop is wrong - see debug messages posted.

Changing the parent loop size as suggested gets this error:

/mnt/A_BT_DEC10/BT__PROGRAMS/A_JAN11/A_BT_LIBRARY/terminal_Bluetooth/mainwindow_Bluetooth.cpp:142: error: member reference base type 'const QStringList[10]' is not a structure or union
mainwindow_Bluetooth.cpp:142:52: error: member reference base type 'const QStringList[10]' is not a structure or union
    for (index_array = 0; index_array <  list_array.size(); ++index_array  )
                                         ~~~~~~~~~~^~~~~

k505415-Jan-24 10:45

k5054

15-Jan-24 10:45

I think you've got your logic in a twist here. I think it should be

C++

for(index_array = 0; index_array < list_array.size(); ++index_array )
{
    // stuff
    for(index_main = 0; index_main < list_array[index_array].size(); ++index_main ) 
    {
       // more stuff
    }
}

Additionally, note that you're calculating list_array.size() and list_array[index_array].size() multiple times. Perhaps better would be

C++

const size_t list_max = list_array.size();
for( index_array = 0; index_array < list_max; ++index_array )
{
   // stuff
   const size_t array_max = list_array[index_array].size();
   for(index_main = 0; index_main < array_max; ++index_main)
   {
      //more stuff 
   }

Maybe, since you've declared list_array as const, the compiler will be able to optimize away the unneeded function calls, but speaking for myself, I find my version just a little easier to read and understand.

"A little song, a little dance, a little seltzer down your pants"
Chuckles the clown

Salvatore Terress15-Jan-24 12:28

SOLVED Re: Loop thru two dimensional array - edited

15-Jan-24 12:28

Sorry, but the compiler till complain about this - without specifying it is an arraray as [10]

/mnt/A_BT_DEC10/BT__PROGRAMS/A_JAN11/A_BT_LIBRARY/terminal_Bluetooth/mainwindow_Bluetooth.cpp:168: error: member reference base type 'const QStringList[10]' is not a structure or union
mainwindow_Bluetooth.cpp:168:39: error: member reference base type 'const QStringList[10]' is not a structure or union
    const size_t list_max = list_array.size();
                            ~~~~~~~~~~^~~~~

const size_t list_max = list_array.size();
 for( index_array = 0; index_array < list_max; ++index_array )
 {
    // stuff
    const size_t array_max = list_array[index_array].size();
    for(index_main = 0; index_main < array_max; ++index_main)
    {
       //more stuff
    }
 }

Salvatore Terress15-Jan-24 12:49

Re: SOLVED Re: Loop thru two dimensional array - edited

15-Jan-24 12:49

SOLVED
Wrong logic in embedded loop - this is size of CURRENT / dynamic MAIN loop member.

Thanks very much for all the help.
Sal

C++

for (index_array = 0; index_array <  list_array[index_array].size()+1; ++index_array  )
{
    text = " index array ";
    text += QString::number(index_array);
    text += "  Array size ";
    text += QString::number(list_array[index_array].size() );
    qDebug() << text;

for (index_main = 0; index_main < list_array[index_array].size(); ++index_main)
{
    text = " main menus  ";
    text += QString::number(index_main);
    text += " ";
    text += list_array[index_array][index_main];
    text += "main menu size ";
    text += QString::number(list_array[index_array][index_main].size());
    qDebug() << text;
}
}

return 0;

{// menus processing

Found the cause of the weird count

The code counts # of characters in the member of the child array....

" index array 0 Array size 7"
" main menus 0 SubWindow terminal added space here (QMdiArea )main menu size 57"
" main menus 1 SubWindow hcitool (QMdiArea )main menu size 34"
" main menus 2 SubWindow bluetoothctl (QMdiArea )main menu size 34"
" main menus 3 SubWindow terminal (QMdiArea )main menu size 34"
" main menus 4 SubWindow hcitool (QMdiArea )main menu size 34"
" main menus 5 SubWindow bluetoothctl (QMdiArea )main menu size 34"
" main menus 6 SubWindow system (QMdiArea )main menu size 34"
ASSERT failure in QList<t>::operator[]: "index out of range", file /home/nov25-1/Qt/5.15.2/gcc_64/include/QtCore/qlist.h, line 575

modified 15-Jan-24 19:10pm.

jeron116-Jan-24 6:39

jeron1

16-Jan-24 6:39

To me anyway, your for loop test seems tailored to the actual counts of items and subitems, what if each QStringList had 15 strings instead of 4?

Couldn't you use containers analogous to stl contianers
something along the lines of;

QList<QStringList> myList;

QStringList strlist1 = { "Blah1", "Blah2", "Blah3" };
QStringList strlist2 = { "Blah4", "Blah5", "Blah6" };
QStringList strlist3 = { "Blah7", "Blah8", "Blah9" };

myList.push_back(strList1);
myList.push_back(strList2);
myList.push_back(strList3);

  for (int mainIndex = 0; mainIndex < myList.size(); mainIndex++)
  {
     // do item stuff
  
     for (int subIndex = 0; subIndex < myList[mainIndex].size(); subIndex++)
     {
        // do some sub item stuff
     }
  }

Re: SOLVED Re: Loop thru two dimensional array - edited

Salvatore Terress16-Jan-24 7:20

Adding "checkable " in Qt QMenu / QAction using C++ partially fails

16-Jan-24 7:20

Yes, pretty much similar code.
..and the idea of "variable count ", I will eventually have a file where I will keep the data and will add to it as required - sort of database .
I messed up a little and had the main loop in the array...
It has been great "discussion" and it helped a lot...
Thanks

PS
I may post the final version ,if anybody cares.
Right now it is lot of "cut and paste" to put it in code
which actuality does puts menu /submenu into main code.

Salvatore Terress13-Jan-24 16:29